Commit | Line | Data |
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e2ebc74d JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * | |
12 | * Transmit and frame generation functions. | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/skbuff.h> | |
18 | #include <linux/etherdevice.h> | |
19 | #include <linux/bitmap.h> | |
d4e46a3d | 20 | #include <linux/rcupdate.h> |
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; | |
0c74211d | 187 | struct ieee80211_if_managed *ifmgd; |
5c1b98a5 KV |
188 | |
189 | /* driver doesn't support power save */ | |
190 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) | |
191 | return TX_CONTINUE; | |
192 | ||
193 | /* hardware does dynamic power save */ | |
194 | if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) | |
195 | return TX_CONTINUE; | |
196 | ||
197 | /* dynamic power save disabled */ | |
198 | if (local->hw.conf.dynamic_ps_timeout <= 0) | |
199 | return TX_CONTINUE; | |
200 | ||
201 | /* we are scanning, don't enable power save */ | |
202 | if (local->scanning) | |
203 | return TX_CONTINUE; | |
204 | ||
205 | if (!local->ps_sdata) | |
206 | return TX_CONTINUE; | |
207 | ||
208 | /* No point if we're going to suspend */ | |
209 | if (local->quiescing) | |
210 | return TX_CONTINUE; | |
211 | ||
0c74211d KV |
212 | /* dynamic ps is supported only in managed mode */ |
213 | if (tx->sdata->vif.type != NL80211_IFTYPE_STATION) | |
214 | return TX_CONTINUE; | |
215 | ||
216 | ifmgd = &tx->sdata->u.mgd; | |
217 | ||
218 | /* | |
219 | * Don't wakeup from power save if u-apsd is enabled, voip ac has | |
220 | * u-apsd enabled and the frame is in voip class. This effectively | |
221 | * means that even if all access categories have u-apsd enabled, in | |
222 | * practise u-apsd is only used with the voip ac. This is a | |
223 | * workaround for the case when received voip class packets do not | |
224 | * have correct qos tag for some reason, due the network or the | |
225 | * peer application. | |
226 | * | |
227 | * Note: local->uapsd_queues access is racy here. If the value is | |
228 | * changed via debugfs, user needs to reassociate manually to have | |
229 | * everything in sync. | |
230 | */ | |
231 | if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) | |
232 | && (local->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) | |
233 | && skb_get_queue_mapping(tx->skb) == 0) | |
234 | return TX_CONTINUE; | |
235 | ||
5c1b98a5 KV |
236 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
237 | ieee80211_stop_queues_by_reason(&local->hw, | |
238 | IEEE80211_QUEUE_STOP_REASON_PS); | |
239 | ieee80211_queue_work(&local->hw, | |
240 | &local->dynamic_ps_disable_work); | |
241 | } | |
242 | ||
243 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
244 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
245 | ||
246 | return TX_CONTINUE; | |
247 | } | |
e2ebc74d | 248 | |
d9e8a70f | 249 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 250 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 251 | { |
358c8d9d | 252 | |
e039fa4a | 253 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 254 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e2ebc74d JB |
255 | u32 sta_flags; |
256 | ||
e039fa4a | 257 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 258 | return TX_CONTINUE; |
58d4185e | 259 | |
b23b025f BG |
260 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
261 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && | |
a9a6ffff KV |
262 | !ieee80211_is_probe_req(hdr->frame_control) && |
263 | !ieee80211_is_nullfunc(hdr->frame_control)) | |
264 | /* | |
265 | * When software scanning only nullfunc frames (to notify | |
266 | * the sleep state to the AP) and probe requests (for the | |
267 | * active scan) are allowed, all other frames should not be | |
268 | * sent and we should not get here, but if we do | |
269 | * nonetheless, drop them to avoid sending them | |
270 | * off-channel. See the link below and | |
271 | * ieee80211_start_scan() for more. | |
272 | * | |
273 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
274 | */ | |
9ae54c84 | 275 | return TX_DROP; |
e2ebc74d | 276 | |
1be7fe8d BJ |
277 | if (tx->sdata->vif.type == NL80211_IFTYPE_WDS) |
278 | return TX_CONTINUE; | |
279 | ||
05c914fe | 280 | if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
33b64eb2 LCC |
281 | return TX_CONTINUE; |
282 | ||
5cf121c3 | 283 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 284 | return TX_CONTINUE; |
e2ebc74d | 285 | |
07346f81 | 286 | sta_flags = tx->sta ? get_sta_flags(tx->sta) : 0; |
e2ebc74d | 287 | |
5cf121c3 | 288 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
e2ebc74d | 289 | if (unlikely(!(sta_flags & WLAN_STA_ASSOC) && |
05c914fe | 290 | tx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
358c8d9d | 291 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d JB |
292 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
293 | printk(KERN_DEBUG "%s: dropped data frame to not " | |
0c68ae26 | 294 | "associated station %pM\n", |
47846c9b | 295 | tx->sdata->name, hdr->addr1); |
e2ebc74d JB |
296 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
297 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); | |
9ae54c84 | 298 | return TX_DROP; |
e2ebc74d JB |
299 | } |
300 | } else { | |
358c8d9d | 301 | if (unlikely(ieee80211_is_data(hdr->frame_control) && |
e2ebc74d | 302 | tx->local->num_sta == 0 && |
05c914fe | 303 | tx->sdata->vif.type != NL80211_IFTYPE_ADHOC)) { |
e2ebc74d JB |
304 | /* |
305 | * No associated STAs - no need to send multicast | |
306 | * frames. | |
307 | */ | |
9ae54c84 | 308 | return TX_DROP; |
e2ebc74d | 309 | } |
9ae54c84 | 310 | return TX_CONTINUE; |
e2ebc74d JB |
311 | } |
312 | ||
9ae54c84 | 313 | return TX_CONTINUE; |
e2ebc74d JB |
314 | } |
315 | ||
e2ebc74d JB |
316 | /* This function is called whenever the AP is about to exceed the maximum limit |
317 | * of buffered frames for power saving STAs. This situation should not really | |
318 | * happen often during normal operation, so dropping the oldest buffered packet | |
319 | * from each queue should be OK to make some room for new frames. */ | |
320 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
321 | { | |
322 | int total = 0, purged = 0; | |
323 | struct sk_buff *skb; | |
324 | struct ieee80211_sub_if_data *sdata; | |
325 | struct sta_info *sta; | |
326 | ||
79010420 JB |
327 | /* |
328 | * virtual interfaces are protected by RCU | |
329 | */ | |
330 | rcu_read_lock(); | |
331 | ||
332 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
e2ebc74d | 333 | struct ieee80211_if_ap *ap; |
05c914fe | 334 | if (sdata->vif.type != NL80211_IFTYPE_AP) |
e2ebc74d JB |
335 | continue; |
336 | ap = &sdata->u.ap; | |
337 | skb = skb_dequeue(&ap->ps_bc_buf); | |
338 | if (skb) { | |
339 | purged++; | |
340 | dev_kfree_skb(skb); | |
341 | } | |
342 | total += skb_queue_len(&ap->ps_bc_buf); | |
343 | } | |
e2ebc74d | 344 | |
d0709a65 | 345 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
e2ebc74d JB |
346 | skb = skb_dequeue(&sta->ps_tx_buf); |
347 | if (skb) { | |
348 | purged++; | |
349 | dev_kfree_skb(skb); | |
350 | } | |
351 | total += skb_queue_len(&sta->ps_tx_buf); | |
352 | } | |
d0709a65 JB |
353 | |
354 | rcu_read_unlock(); | |
e2ebc74d JB |
355 | |
356 | local->total_ps_buffered = total; | |
54223995 | 357 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0fb9a9ec JP |
358 | wiphy_debug(local->hw.wiphy, "PS buffers full - purged %d frames\n", |
359 | purged); | |
f4ea83dd | 360 | #endif |
e2ebc74d JB |
361 | } |
362 | ||
9ae54c84 | 363 | static ieee80211_tx_result |
5cf121c3 | 364 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 365 | { |
e039fa4a | 366 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 367 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 368 | |
7d54d0dd JB |
369 | /* |
370 | * broadcast/multicast frame | |
371 | * | |
372 | * If any of the associated stations is in power save mode, | |
373 | * the frame is buffered to be sent after DTIM beacon frame. | |
374 | * This is done either by the hardware or us. | |
375 | */ | |
376 | ||
3e122be0 JB |
377 | /* powersaving STAs only in AP/VLAN mode */ |
378 | if (!tx->sdata->bss) | |
379 | return TX_CONTINUE; | |
380 | ||
381 | /* no buffering for ordered frames */ | |
358c8d9d | 382 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 383 | return TX_CONTINUE; |
7d54d0dd JB |
384 | |
385 | /* no stations in PS mode */ | |
386 | if (!atomic_read(&tx->sdata->bss->num_sta_ps)) | |
9ae54c84 | 387 | return TX_CONTINUE; |
7d54d0dd | 388 | |
62b517cb | 389 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
62b1208e | 390 | |
62b517cb JB |
391 | /* device releases frame after DTIM beacon */ |
392 | if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)) | |
62b1208e | 393 | return TX_CONTINUE; |
62b1208e | 394 | |
7d54d0dd | 395 | /* buffered in mac80211 */ |
62b1208e JB |
396 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
397 | purge_old_ps_buffers(tx->local); | |
398 | ||
399 | if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >= AP_MAX_BC_BUFFER) { | |
54223995 | 400 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
62b1208e JB |
401 | if (net_ratelimit()) |
402 | printk(KERN_DEBUG "%s: BC TX buffer full - dropping the oldest frame\n", | |
47846c9b | 403 | tx->sdata->name); |
f4ea83dd | 404 | #endif |
62b1208e JB |
405 | dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf)); |
406 | } else | |
407 | tx->local->total_ps_buffered++; | |
e2ebc74d | 408 | |
62b1208e | 409 | skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb); |
7d54d0dd | 410 | |
62b1208e | 411 | return TX_QUEUED; |
e2ebc74d JB |
412 | } |
413 | ||
fb733336 JM |
414 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
415 | struct sk_buff *skb) | |
416 | { | |
417 | if (!ieee80211_is_mgmt(fc)) | |
418 | return 0; | |
419 | ||
420 | if (sta == NULL || !test_sta_flags(sta, WLAN_STA_MFP)) | |
421 | return 0; | |
422 | ||
423 | if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) | |
424 | skb->data)) | |
425 | return 0; | |
426 | ||
427 | return 1; | |
428 | } | |
429 | ||
9ae54c84 | 430 | static ieee80211_tx_result |
5cf121c3 | 431 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
432 | { |
433 | struct sta_info *sta = tx->sta; | |
e039fa4a | 434 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 435 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
3393a608 | 436 | struct ieee80211_local *local = tx->local; |
07346f81 | 437 | u32 staflags; |
e2ebc74d | 438 | |
f64f9e71 JP |
439 | if (unlikely(!sta || |
440 | ieee80211_is_probe_resp(hdr->frame_control) || | |
441 | ieee80211_is_auth(hdr->frame_control) || | |
442 | ieee80211_is_assoc_resp(hdr->frame_control) || | |
443 | ieee80211_is_reassoc_resp(hdr->frame_control))) | |
9ae54c84 | 444 | return TX_CONTINUE; |
e2ebc74d | 445 | |
07346f81 JB |
446 | staflags = get_sta_flags(sta); |
447 | ||
af818581 | 448 | if (unlikely((staflags & (WLAN_STA_PS_STA | WLAN_STA_PS_DRIVER)) && |
3fa52056 | 449 | !(info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE))) { |
e2ebc74d | 450 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0c68ae26 | 451 | printk(KERN_DEBUG "STA %pM aid %d: PS buffer (entries " |
e2ebc74d | 452 | "before %d)\n", |
0c68ae26 | 453 | sta->sta.addr, sta->sta.aid, |
e2ebc74d JB |
454 | skb_queue_len(&sta->ps_tx_buf)); |
455 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
e2ebc74d JB |
456 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
457 | purge_old_ps_buffers(tx->local); | |
458 | if (skb_queue_len(&sta->ps_tx_buf) >= STA_MAX_TX_BUFFER) { | |
459 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf); | |
54223995 | 460 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
e2ebc74d | 461 | if (net_ratelimit()) { |
0c68ae26 | 462 | printk(KERN_DEBUG "%s: STA %pM TX " |
e2ebc74d | 463 | "buffer full - dropping oldest frame\n", |
47846c9b | 464 | tx->sdata->name, sta->sta.addr); |
e2ebc74d | 465 | } |
f4ea83dd | 466 | #endif |
e2ebc74d JB |
467 | dev_kfree_skb(old); |
468 | } else | |
469 | tx->local->total_ps_buffered++; | |
004c872e | 470 | |
af818581 JB |
471 | /* |
472 | * Queue frame to be sent after STA wakes up/polls, | |
473 | * but don't set the TIM bit if the driver is blocking | |
474 | * wakeup or poll response transmissions anyway. | |
475 | */ | |
476 | if (skb_queue_empty(&sta->ps_tx_buf) && | |
477 | !(staflags & WLAN_STA_PS_DRIVER)) | |
004c872e JB |
478 | sta_info_set_tim_bit(sta); |
479 | ||
e039fa4a | 480 | info->control.jiffies = jiffies; |
5061b0c2 | 481 | info->control.vif = &tx->sdata->vif; |
8f77f384 | 482 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
e2ebc74d | 483 | skb_queue_tail(&sta->ps_tx_buf, tx->skb); |
3393a608 JO |
484 | |
485 | if (!timer_pending(&local->sta_cleanup)) | |
486 | mod_timer(&local->sta_cleanup, | |
487 | round_jiffies(jiffies + | |
488 | STA_INFO_CLEANUP_INTERVAL)); | |
489 | ||
9ae54c84 | 490 | return TX_QUEUED; |
e2ebc74d JB |
491 | } |
492 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
af818581 | 493 | else if (unlikely(staflags & WLAN_STA_PS_STA)) { |
0c68ae26 | 494 | printk(KERN_DEBUG "%s: STA %pM in PS mode, but pspoll " |
47846c9b | 495 | "set -> send frame\n", tx->sdata->name, |
0c68ae26 | 496 | sta->sta.addr); |
e2ebc74d JB |
497 | } |
498 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
e2ebc74d | 499 | |
9ae54c84 | 500 | return TX_CONTINUE; |
e2ebc74d JB |
501 | } |
502 | ||
d9e8a70f | 503 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 504 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 505 | { |
5cf121c3 | 506 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 507 | return TX_CONTINUE; |
e2ebc74d | 508 | |
5cf121c3 | 509 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
510 | return ieee80211_tx_h_unicast_ps_buf(tx); |
511 | else | |
512 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
513 | } | |
514 | ||
a621fa4d JB |
515 | static ieee80211_tx_result debug_noinline |
516 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
517 | { | |
518 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
519 | ||
520 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol && | |
521 | tx->sdata->control_port_no_encrypt)) | |
522 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
523 | ||
524 | return TX_CONTINUE; | |
525 | } | |
526 | ||
d9e8a70f | 527 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 528 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 529 | { |
d3feaf5a | 530 | struct ieee80211_key *key = NULL; |
e039fa4a | 531 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 532 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 533 | |
3b8d81e0 | 534 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 535 | tx->key = NULL; |
e31b8213 | 536 | else if (tx->sta && (key = rcu_dereference(tx->sta->ptk))) |
d4e46a3d | 537 | tx->key = key; |
3cfcf6ac | 538 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 JM |
539 | is_multicast_ether_addr(hdr->addr1) && |
540 | ieee80211_is_robust_mgmt_frame(hdr) && | |
3cfcf6ac JM |
541 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
542 | tx->key = key; | |
f7e0104c JB |
543 | else if (is_multicast_ether_addr(hdr->addr1) && |
544 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
545 | tx->key = key; | |
546 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
547 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 548 | tx->key = key; |
e2ebc74d | 549 | else if (tx->sdata->drop_unencrypted && |
a621fa4d | 550 | (tx->skb->protocol != tx->sdata->control_port_protocol) && |
e0463f50 JM |
551 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && |
552 | (!ieee80211_is_robust_mgmt_frame(hdr) || | |
553 | (ieee80211_is_action(hdr->frame_control) && | |
554 | tx->sta && test_sta_flags(tx->sta, WLAN_STA_MFP)))) { | |
e2ebc74d | 555 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); |
9ae54c84 | 556 | return TX_DROP; |
176e4f84 | 557 | } else |
e2ebc74d JB |
558 | tx->key = NULL; |
559 | ||
560 | if (tx->key) { | |
813d7669 JB |
561 | bool skip_hw = false; |
562 | ||
e2ebc74d | 563 | tx->key->tx_rx_count++; |
011bfcc4 | 564 | /* TODO: add threshold stuff again */ |
176e4f84 | 565 | |
97359d12 JB |
566 | switch (tx->key->conf.cipher) { |
567 | case WLAN_CIPHER_SUITE_WEP40: | |
568 | case WLAN_CIPHER_SUITE_WEP104: | |
358c8d9d | 569 | if (ieee80211_is_auth(hdr->frame_control)) |
176e4f84 | 570 | break; |
97359d12 | 571 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 572 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
573 | tx->key = NULL; |
574 | break; | |
97359d12 | 575 | case WLAN_CIPHER_SUITE_CCMP: |
fb733336 JM |
576 | if (!ieee80211_is_data_present(hdr->frame_control) && |
577 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
578 | tx->skb)) | |
579 | tx->key = NULL; | |
3b43a187 KV |
580 | else |
581 | skip_hw = (tx->key->conf.flags & | |
582 | IEEE80211_KEY_FLAG_SW_MGMT) && | |
583 | ieee80211_is_mgmt(hdr->frame_control); | |
fb733336 | 584 | break; |
97359d12 | 585 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac JM |
586 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
587 | tx->key = NULL; | |
588 | break; | |
176e4f84 | 589 | } |
813d7669 | 590 | |
f12553eb | 591 | if (!skip_hw && tx->key && |
382b1655 | 592 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 593 | info->control.hw_key = &tx->key->conf; |
e2ebc74d JB |
594 | } |
595 | ||
9ae54c84 | 596 | return TX_CONTINUE; |
e2ebc74d JB |
597 | } |
598 | ||
d9e8a70f | 599 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 600 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 601 | { |
e039fa4a | 602 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
603 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
604 | struct ieee80211_supported_band *sband; | |
605 | struct ieee80211_rate *rate; | |
a2c40249 SZ |
606 | int i; |
607 | u32 len; | |
e6a9854b JB |
608 | bool inval = false, rts = false, short_preamble = false; |
609 | struct ieee80211_tx_rate_control txrc; | |
b770b43e | 610 | u32 sta_flags; |
8318d78a | 611 | |
e6a9854b | 612 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 613 | |
e6a9854b | 614 | sband = tx->local->hw.wiphy->bands[tx->channel->band]; |
58d4185e | 615 | |
a2c40249 | 616 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 617 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
618 | |
619 | /* set up the tx rate control struct we give the RC algo */ | |
620 | txrc.hw = local_to_hw(tx->local); | |
621 | txrc.sband = sband; | |
622 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
623 | txrc.skb = tx->skb; | |
624 | txrc.reported_rate.idx = -1; | |
37eb0b16 JM |
625 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[tx->channel->band]; |
626 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) | |
627 | txrc.max_rate_idx = -1; | |
628 | else | |
629 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
8f0729b1 FF |
630 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
631 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC); | |
e6a9854b JB |
632 | |
633 | /* set up RTS protection if desired */ | |
b9a5f8ca | 634 | if (len > tx->local->hw.wiphy->rts_threshold) { |
e6a9854b | 635 | txrc.rts = rts = true; |
e2ebc74d | 636 | } |
e2ebc74d | 637 | |
e6a9854b JB |
638 | /* |
639 | * Use short preamble if the BSS can handle it, but not for | |
640 | * management frames unless we know the receiver can handle | |
641 | * that -- the management frame might be to a station that | |
642 | * just wants a probe response. | |
643 | */ | |
644 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
645 | (ieee80211_is_data(hdr->frame_control) || | |
646 | (tx->sta && test_sta_flags(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) | |
647 | txrc.short_preamble = short_preamble = true; | |
e2ebc74d | 648 | |
b770b43e LR |
649 | sta_flags = tx->sta ? get_sta_flags(tx->sta) : 0; |
650 | ||
651 | /* | |
652 | * Lets not bother rate control if we're associated and cannot | |
653 | * talk to the sta. This should not happen. | |
654 | */ | |
fbe9c429 | 655 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && |
b770b43e LR |
656 | (sta_flags & WLAN_STA_ASSOC) && |
657 | !rate_usable_index_exists(sband, &tx->sta->sta), | |
658 | "%s: Dropped data frame as no usable bitrate found while " | |
659 | "scanning and associated. Target station: " | |
660 | "%pM on %d GHz band\n", | |
47846c9b | 661 | tx->sdata->name, hdr->addr1, |
b770b43e LR |
662 | tx->channel->band ? 5 : 2)) |
663 | return TX_DROP; | |
2e92e6f2 | 664 | |
b770b43e LR |
665 | /* |
666 | * If we're associated with the sta at this point we know we can at | |
667 | * least send the frame at the lowest bit rate. | |
668 | */ | |
e6a9854b JB |
669 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
670 | ||
671 | if (unlikely(info->control.rates[0].idx < 0)) | |
672 | return TX_DROP; | |
673 | ||
c1ce5a74 | 674 | if (txrc.reported_rate.idx < 0) { |
e6a9854b | 675 | txrc.reported_rate = info->control.rates[0]; |
c1ce5a74 HS |
676 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
677 | tx->sta->last_tx_rate = txrc.reported_rate; | |
678 | } else if (tx->sta) | |
e6a9854b | 679 | tx->sta->last_tx_rate = txrc.reported_rate; |
e039fa4a | 680 | |
e6a9854b JB |
681 | if (unlikely(!info->control.rates[0].count)) |
682 | info->control.rates[0].count = 1; | |
e2ebc74d | 683 | |
9955151d GS |
684 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
685 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
686 | info->control.rates[0].count = 1; | |
687 | ||
e6a9854b JB |
688 | if (is_multicast_ether_addr(hdr->addr1)) { |
689 | /* | |
690 | * XXX: verify the rate is in the basic rateset | |
691 | */ | |
692 | return TX_CONTINUE; | |
e2ebc74d JB |
693 | } |
694 | ||
e6a9854b JB |
695 | /* |
696 | * set up the RTS/CTS rate as the fastest basic rate | |
697 | * that is not faster than the data rate | |
698 | * | |
699 | * XXX: Should this check all retry rates? | |
700 | */ | |
701 | if (!(info->control.rates[0].flags & IEEE80211_TX_RC_MCS)) { | |
702 | s8 baserate = 0; | |
703 | ||
704 | rate = &sband->bitrates[info->control.rates[0].idx]; | |
705 | ||
706 | for (i = 0; i < sband->n_bitrates; i++) { | |
707 | /* must be a basic rate */ | |
708 | if (!(tx->sdata->vif.bss_conf.basic_rates & BIT(i))) | |
709 | continue; | |
710 | /* must not be faster than the data rate */ | |
711 | if (sband->bitrates[i].bitrate > rate->bitrate) | |
712 | continue; | |
713 | /* maximum */ | |
714 | if (sband->bitrates[baserate].bitrate < | |
715 | sband->bitrates[i].bitrate) | |
716 | baserate = i; | |
717 | } | |
718 | ||
719 | info->control.rts_cts_rate_idx = baserate; | |
7e9ed188 DD |
720 | } |
721 | ||
e6a9854b JB |
722 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
723 | /* | |
724 | * make sure there's no valid rate following | |
725 | * an invalid one, just in case drivers don't | |
726 | * take the API seriously to stop at -1. | |
727 | */ | |
728 | if (inval) { | |
729 | info->control.rates[i].idx = -1; | |
730 | continue; | |
731 | } | |
732 | if (info->control.rates[i].idx < 0) { | |
733 | inval = true; | |
734 | continue; | |
735 | } | |
8318d78a | 736 | |
e6a9854b JB |
737 | /* |
738 | * For now assume MCS is already set up correctly, this | |
739 | * needs to be fixed. | |
740 | */ | |
741 | if (info->control.rates[i].flags & IEEE80211_TX_RC_MCS) { | |
742 | WARN_ON(info->control.rates[i].idx > 76); | |
743 | continue; | |
744 | } | |
e2ebc74d | 745 | |
e6a9854b JB |
746 | /* set up RTS protection if desired */ |
747 | if (rts) | |
748 | info->control.rates[i].flags |= | |
749 | IEEE80211_TX_RC_USE_RTS_CTS; | |
8318d78a | 750 | |
e6a9854b | 751 | /* RC is busted */ |
075cbc9e S |
752 | if (WARN_ON_ONCE(info->control.rates[i].idx >= |
753 | sband->n_bitrates)) { | |
e6a9854b JB |
754 | info->control.rates[i].idx = -1; |
755 | continue; | |
8318d78a | 756 | } |
e2ebc74d | 757 | |
e6a9854b JB |
758 | rate = &sband->bitrates[info->control.rates[i].idx]; |
759 | ||
760 | /* set up short preamble */ | |
761 | if (short_preamble && | |
762 | rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) | |
763 | info->control.rates[i].flags |= | |
764 | IEEE80211_TX_RC_USE_SHORT_PREAMBLE; | |
765 | ||
766 | /* set up G protection */ | |
767 | if (!rts && tx->sdata->vif.bss_conf.use_cts_prot && | |
768 | rate->flags & IEEE80211_RATE_ERP_G) | |
769 | info->control.rates[i].flags |= | |
770 | IEEE80211_TX_RC_USE_CTS_PROTECT; | |
e2ebc74d JB |
771 | } |
772 | ||
e6a9854b JB |
773 | return TX_CONTINUE; |
774 | } | |
775 | ||
f591fa5d JB |
776 | static ieee80211_tx_result debug_noinline |
777 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
778 | { | |
779 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
780 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
781 | u16 *seq; | |
782 | u8 *qc; | |
783 | int tid; | |
784 | ||
25d834e1 JB |
785 | /* |
786 | * Packet injection may want to control the sequence | |
787 | * number, if we have no matching interface then we | |
788 | * neither assign one ourselves nor ask the driver to. | |
789 | */ | |
5061b0c2 | 790 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
791 | return TX_CONTINUE; |
792 | ||
f591fa5d JB |
793 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
794 | return TX_CONTINUE; | |
795 | ||
796 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
797 | return TX_CONTINUE; | |
798 | ||
94778280 JB |
799 | /* |
800 | * Anything but QoS data that has a sequence number field | |
801 | * (is long enough) gets a sequence number from the global | |
802 | * counter. | |
803 | */ | |
f591fa5d | 804 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
94778280 | 805 | /* driver should assign sequence number */ |
f591fa5d | 806 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
807 | /* for pure STA mode without beacons, we can do it */ |
808 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
809 | tx->sdata->sequence_number += 0x10; | |
f591fa5d JB |
810 | return TX_CONTINUE; |
811 | } | |
812 | ||
813 | /* | |
814 | * This should be true for injected/management frames only, for | |
815 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
816 | * above since they are not QoS-data frames. | |
817 | */ | |
818 | if (!tx->sta) | |
819 | return TX_CONTINUE; | |
820 | ||
821 | /* include per-STA, per-TID sequence counter */ | |
822 | ||
823 | qc = ieee80211_get_qos_ctl(hdr); | |
824 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
825 | seq = &tx->sta->tid_seq[tid]; | |
826 | ||
827 | hdr->seq_ctrl = cpu_to_le16(*seq); | |
828 | ||
829 | /* Increase the sequence number. */ | |
830 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
831 | ||
832 | return TX_CONTINUE; | |
833 | } | |
834 | ||
2de8e0d9 JB |
835 | static int ieee80211_fragment(struct ieee80211_local *local, |
836 | struct sk_buff *skb, int hdrlen, | |
837 | int frag_threshold) | |
838 | { | |
839 | struct sk_buff *tail = skb, *tmp; | |
840 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; | |
841 | int pos = hdrlen + per_fragm; | |
842 | int rem = skb->len - hdrlen - per_fragm; | |
843 | ||
844 | if (WARN_ON(rem < 0)) | |
845 | return -EINVAL; | |
846 | ||
847 | while (rem) { | |
848 | int fraglen = per_fragm; | |
849 | ||
850 | if (fraglen > rem) | |
851 | fraglen = rem; | |
852 | rem -= fraglen; | |
853 | tmp = dev_alloc_skb(local->tx_headroom + | |
854 | frag_threshold + | |
855 | IEEE80211_ENCRYPT_HEADROOM + | |
856 | IEEE80211_ENCRYPT_TAILROOM); | |
857 | if (!tmp) | |
858 | return -ENOMEM; | |
859 | tail->next = tmp; | |
860 | tail = tmp; | |
861 | skb_reserve(tmp, local->tx_headroom + | |
862 | IEEE80211_ENCRYPT_HEADROOM); | |
863 | /* copy control information */ | |
864 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
865 | skb_copy_queue_mapping(tmp, skb); | |
866 | tmp->priority = skb->priority; | |
2de8e0d9 | 867 | tmp->dev = skb->dev; |
2de8e0d9 JB |
868 | |
869 | /* copy header and data */ | |
870 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
871 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
872 | ||
873 | pos += fraglen; | |
874 | } | |
875 | ||
876 | skb->len = hdrlen + per_fragm; | |
877 | return 0; | |
878 | } | |
879 | ||
d9e8a70f | 880 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
881 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
882 | { | |
2de8e0d9 JB |
883 | struct sk_buff *skb = tx->skb; |
884 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
885 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 886 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
887 | int hdrlen; |
888 | int fragnum; | |
e2454948 JB |
889 | |
890 | if (!(tx->flags & IEEE80211_TX_FRAGMENTED)) | |
891 | return TX_CONTINUE; | |
892 | ||
eefce91a JB |
893 | /* |
894 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 895 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 896 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 897 | */ |
8b30b1fe | 898 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
899 | return TX_DROP; |
900 | ||
065e9605 | 901 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 902 | |
2de8e0d9 | 903 | /* internal error, why is TX_FRAGMENTED set? */ |
8ccd8f21 | 904 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 905 | return TX_DROP; |
e6a9854b | 906 | |
2de8e0d9 JB |
907 | /* |
908 | * Now fragment the frame. This will allocate all the fragments and | |
909 | * chain them (using skb as the first fragment) to skb->next. | |
910 | * During transmission, we will remove the successfully transmitted | |
911 | * fragments from this list. When the low-level driver rejects one | |
912 | * of the fragments then we will simply pretend to accept the skb | |
913 | * but store it away as pending. | |
914 | */ | |
915 | if (ieee80211_fragment(tx->local, skb, hdrlen, frag_threshold)) | |
916 | return TX_DROP; | |
e6a9854b | 917 | |
2de8e0d9 JB |
918 | /* update duration/seq/flags of fragments */ |
919 | fragnum = 0; | |
920 | do { | |
921 | int next_len; | |
922 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); | |
e6a9854b | 923 | |
2de8e0d9 JB |
924 | hdr = (void *)skb->data; |
925 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 926 | |
2de8e0d9 JB |
927 | if (skb->next) { |
928 | hdr->frame_control |= morefrags; | |
929 | next_len = skb->next->len; | |
e6a9854b JB |
930 | /* |
931 | * No multi-rate retries for fragmented frames, that | |
932 | * would completely throw off the NAV at other STAs. | |
933 | */ | |
934 | info->control.rates[1].idx = -1; | |
935 | info->control.rates[2].idx = -1; | |
936 | info->control.rates[3].idx = -1; | |
937 | info->control.rates[4].idx = -1; | |
938 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 5); | |
939 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; | |
2de8e0d9 JB |
940 | } else { |
941 | hdr->frame_control &= ~morefrags; | |
942 | next_len = 0; | |
e6a9854b | 943 | } |
2de8e0d9 JB |
944 | hdr->duration_id = ieee80211_duration(tx, 0, next_len); |
945 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); | |
946 | fragnum++; | |
947 | } while ((skb = skb->next)); | |
e2ebc74d | 948 | |
9ae54c84 | 949 | return TX_CONTINUE; |
e2ebc74d JB |
950 | } |
951 | ||
feff1f2f JB |
952 | static ieee80211_tx_result debug_noinline |
953 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
954 | { | |
955 | struct sk_buff *skb = tx->skb; | |
956 | ||
957 | if (!tx->sta) | |
958 | return TX_CONTINUE; | |
959 | ||
960 | tx->sta->tx_packets++; | |
961 | do { | |
962 | tx->sta->tx_fragments++; | |
963 | tx->sta->tx_bytes += skb->len; | |
964 | } while ((skb = skb->next)); | |
965 | ||
966 | return TX_CONTINUE; | |
967 | } | |
968 | ||
d9e8a70f | 969 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
970 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
971 | { | |
3ffc2a90 JB |
972 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
973 | ||
e2454948 JB |
974 | if (!tx->key) |
975 | return TX_CONTINUE; | |
976 | ||
97359d12 JB |
977 | switch (tx->key->conf.cipher) { |
978 | case WLAN_CIPHER_SUITE_WEP40: | |
979 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 980 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 981 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 982 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 983 | case WLAN_CIPHER_SUITE_CCMP: |
e2454948 | 984 | return ieee80211_crypto_ccmp_encrypt(tx); |
97359d12 | 985 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 986 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
3ffc2a90 JB |
987 | default: |
988 | /* handle hw-only algorithm */ | |
989 | if (info->control.hw_key) { | |
990 | ieee80211_tx_set_protected(tx); | |
991 | return TX_CONTINUE; | |
992 | } | |
993 | break; | |
994 | ||
e2454948 JB |
995 | } |
996 | ||
e2454948 JB |
997 | return TX_DROP; |
998 | } | |
999 | ||
d9e8a70f | 1000 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1001 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1002 | { | |
2de8e0d9 JB |
1003 | struct sk_buff *skb = tx->skb; |
1004 | struct ieee80211_hdr *hdr; | |
1005 | int next_len; | |
1006 | bool group_addr; | |
03f93c3d | 1007 | |
2de8e0d9 JB |
1008 | do { |
1009 | hdr = (void *) skb->data; | |
7e0aae47 JM |
1010 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1011 | break; /* must not overwrite AID */ | |
2de8e0d9 JB |
1012 | next_len = skb->next ? skb->next->len : 0; |
1013 | group_addr = is_multicast_ether_addr(hdr->addr1); | |
03f93c3d | 1014 | |
2de8e0d9 JB |
1015 | hdr->duration_id = |
1016 | ieee80211_duration(tx, group_addr, next_len); | |
1017 | } while ((skb = skb->next)); | |
03f93c3d JB |
1018 | |
1019 | return TX_CONTINUE; | |
1020 | } | |
1021 | ||
e2ebc74d JB |
1022 | /* actual transmit path */ |
1023 | ||
1024 | /* | |
1025 | * deal with packet injection down monitor interface | |
1026 | * with Radiotap Header -- only called for monitor mode interface | |
1027 | */ | |
27004b10 JB |
1028 | static bool __ieee80211_parse_tx_radiotap(struct ieee80211_tx_data *tx, |
1029 | struct sk_buff *skb) | |
e2ebc74d JB |
1030 | { |
1031 | /* | |
1032 | * this is the moment to interpret and discard the radiotap header that | |
1033 | * must be at the start of the packet injected in Monitor mode | |
1034 | * | |
1035 | * Need to take some care with endian-ness since radiotap | |
1036 | * args are little-endian | |
1037 | */ | |
1038 | ||
1039 | struct ieee80211_radiotap_iterator iterator; | |
1040 | struct ieee80211_radiotap_header *rthdr = | |
1041 | (struct ieee80211_radiotap_header *) skb->data; | |
8318d78a | 1042 | struct ieee80211_supported_band *sband; |
f23a4780 | 1043 | bool hw_frag; |
3b8d81e0 | 1044 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
33e5a2f7 JB |
1045 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, |
1046 | NULL); | |
e2ebc74d | 1047 | |
2e92e6f2 | 1048 | sband = tx->local->hw.wiphy->bands[tx->channel->band]; |
8318d78a | 1049 | |
3b8d81e0 | 1050 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
5cf121c3 | 1051 | tx->flags &= ~IEEE80211_TX_FRAGMENTED; |
e2ebc74d | 1052 | |
f23a4780 AN |
1053 | /* packet is fragmented in HW if we have a non-NULL driver callback */ |
1054 | hw_frag = (tx->local->ops->set_frag_threshold != NULL); | |
1055 | ||
e2ebc74d JB |
1056 | /* |
1057 | * for every radiotap entry that is present | |
1058 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1059 | * entries present, or -EINVAL on error) | |
1060 | */ | |
1061 | ||
1062 | while (!ret) { | |
e2ebc74d JB |
1063 | ret = ieee80211_radiotap_iterator_next(&iterator); |
1064 | ||
1065 | if (ret) | |
1066 | continue; | |
1067 | ||
1068 | /* see if this argument is something we can use */ | |
1069 | switch (iterator.this_arg_index) { | |
1070 | /* | |
1071 | * You must take care when dereferencing iterator.this_arg | |
1072 | * for multibyte types... the pointer is not aligned. Use | |
1073 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1074 | * iterator.this_arg for type "type" safely on all arches. | |
1075 | */ | |
e2ebc74d JB |
1076 | case IEEE80211_RADIOTAP_FLAGS: |
1077 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1078 | /* | |
1079 | * this indicates that the skb we have been | |
1080 | * handed has the 32-bit FCS CRC at the end... | |
1081 | * we should react to that by snipping it off | |
1082 | * because it will be recomputed and added | |
1083 | * on transmission | |
1084 | */ | |
33e5a2f7 | 1085 | if (skb->len < (iterator._max_length + FCS_LEN)) |
27004b10 | 1086 | return false; |
e2ebc74d JB |
1087 | |
1088 | skb_trim(skb, skb->len - FCS_LEN); | |
1089 | } | |
58d4185e | 1090 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) |
3b8d81e0 | 1091 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; |
f23a4780 AN |
1092 | if ((*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) && |
1093 | !hw_frag) | |
5cf121c3 | 1094 | tx->flags |= IEEE80211_TX_FRAGMENTED; |
e2ebc74d JB |
1095 | break; |
1096 | ||
58d4185e JB |
1097 | /* |
1098 | * Please update the file | |
1099 | * Documentation/networking/mac80211-injection.txt | |
1100 | * when parsing new fields here. | |
1101 | */ | |
1102 | ||
e2ebc74d JB |
1103 | default: |
1104 | break; | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
27004b10 | 1109 | return false; |
e2ebc74d JB |
1110 | |
1111 | /* | |
1112 | * remove the radiotap header | |
33e5a2f7 | 1113 | * iterator->_max_length was sanity-checked against |
e2ebc74d JB |
1114 | * skb->len by iterator init |
1115 | */ | |
33e5a2f7 | 1116 | skb_pull(skb, iterator._max_length); |
e2ebc74d | 1117 | |
27004b10 | 1118 | return true; |
e2ebc74d JB |
1119 | } |
1120 | ||
a622ab72 JB |
1121 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1122 | struct sk_buff *skb, | |
1123 | struct ieee80211_tx_info *info, | |
1124 | struct tid_ampdu_tx *tid_tx, | |
1125 | int tid) | |
1126 | { | |
1127 | bool queued = false; | |
1128 | ||
1129 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1130 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
0ab33703 JB |
1131 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1132 | /* | |
1133 | * nothing -- this aggregation session is being started | |
1134 | * but that might still fail with the driver | |
1135 | */ | |
a622ab72 JB |
1136 | } else { |
1137 | spin_lock(&tx->sta->lock); | |
1138 | /* | |
1139 | * Need to re-check now, because we may get here | |
1140 | * | |
1141 | * 1) in the window during which the setup is actually | |
1142 | * already done, but not marked yet because not all | |
1143 | * packets are spliced over to the driver pending | |
1144 | * queue yet -- if this happened we acquire the lock | |
1145 | * either before or after the splice happens, but | |
1146 | * need to recheck which of these cases happened. | |
1147 | * | |
1148 | * 2) during session teardown, if the OPERATIONAL bit | |
1149 | * was cleared due to the teardown but the pointer | |
1150 | * hasn't been assigned NULL yet (or we loaded it | |
1151 | * before it was assigned) -- in this case it may | |
1152 | * now be NULL which means we should just let the | |
1153 | * packet pass through because splicing the frames | |
1154 | * back is already done. | |
1155 | */ | |
1156 | tid_tx = tx->sta->ampdu_mlme.tid_tx[tid]; | |
1157 | ||
1158 | if (!tid_tx) { | |
1159 | /* do nothing, let packet pass through */ | |
1160 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1161 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
1162 | } else { | |
1163 | queued = true; | |
1164 | info->control.vif = &tx->sdata->vif; | |
1165 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1166 | __skb_queue_tail(&tid_tx->pending, skb); | |
1167 | } | |
1168 | spin_unlock(&tx->sta->lock); | |
1169 | } | |
1170 | ||
1171 | return queued; | |
1172 | } | |
1173 | ||
58d4185e JB |
1174 | /* |
1175 | * initialises @tx | |
1176 | */ | |
9ae54c84 | 1177 | static ieee80211_tx_result |
3b8d81e0 JB |
1178 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1179 | struct ieee80211_tx_data *tx, | |
1180 | struct sk_buff *skb) | |
e2ebc74d | 1181 | { |
3b8d81e0 | 1182 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1183 | struct ieee80211_hdr *hdr; |
e039fa4a | 1184 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
8b30b1fe | 1185 | int hdrlen, tid; |
a622ab72 | 1186 | u8 *qc; |
e2ebc74d JB |
1187 | |
1188 | memset(tx, 0, sizeof(*tx)); | |
1189 | tx->skb = skb; | |
e2ebc74d | 1190 | tx->local = local; |
3b8d81e0 | 1191 | tx->sdata = sdata; |
e039fa4a | 1192 | tx->channel = local->hw.conf.channel; |
e2ebc74d | 1193 | /* |
58d4185e JB |
1194 | * Set this flag (used below to indicate "automatic fragmentation"), |
1195 | * it will be cleared/left by radiotap as desired. | |
f23a4780 | 1196 | * Only valid when fragmentation is done by the stack. |
e2ebc74d | 1197 | */ |
f23a4780 AN |
1198 | if (!local->ops->set_frag_threshold) |
1199 | tx->flags |= IEEE80211_TX_FRAGMENTED; | |
e2ebc74d JB |
1200 | |
1201 | /* process and remove the injection radiotap header */ | |
17ad353b | 1202 | if (unlikely(info->flags & IEEE80211_TX_INTFL_HAS_RADIOTAP)) { |
27004b10 | 1203 | if (!__ieee80211_parse_tx_radiotap(tx, skb)) |
9ae54c84 | 1204 | return TX_DROP; |
58d4185e | 1205 | |
e2ebc74d | 1206 | /* |
58d4185e JB |
1207 | * __ieee80211_parse_tx_radiotap has now removed |
1208 | * the radiotap header that was present and pre-filled | |
1209 | * 'tx' with tx control information. | |
e2ebc74d | 1210 | */ |
17ad353b | 1211 | info->flags &= ~IEEE80211_TX_INTFL_HAS_RADIOTAP; |
e2ebc74d JB |
1212 | } |
1213 | ||
cd8ffc80 JB |
1214 | /* |
1215 | * If this flag is set to true anywhere, and we get here, | |
1216 | * we are doing the needed processing, so remove the flag | |
1217 | * now. | |
1218 | */ | |
1219 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1220 | ||
58d4185e JB |
1221 | hdr = (struct ieee80211_hdr *) skb->data; |
1222 | ||
3f0e0b22 | 1223 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
f14543ee | 1224 | tx->sta = rcu_dereference(sdata->u.vlan.sta); |
3f0e0b22 FF |
1225 | if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr) |
1226 | return TX_DROP; | |
b4d57adb FF |
1227 | } else if (info->flags & IEEE80211_TX_CTL_INJECTED) { |
1228 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); | |
3f0e0b22 | 1229 | } |
f14543ee | 1230 | if (!tx->sta) |
abe60632 | 1231 | tx->sta = sta_info_get(sdata, hdr->addr1); |
58d4185e | 1232 | |
cd8ffc80 JB |
1233 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
1234 | (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)) { | |
cd8ffc80 JB |
1235 | struct tid_ampdu_tx *tid_tx; |
1236 | ||
8b30b1fe S |
1237 | qc = ieee80211_get_qos_ctl(hdr); |
1238 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
1239 | ||
a622ab72 JB |
1240 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1241 | if (tid_tx) { | |
1242 | bool queued; | |
cd8ffc80 | 1243 | |
a622ab72 JB |
1244 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1245 | tid_tx, tid); | |
1246 | ||
1247 | if (unlikely(queued)) | |
1248 | return TX_QUEUED; | |
1249 | } | |
8b30b1fe S |
1250 | } |
1251 | ||
badffb72 | 1252 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1253 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1254 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
badffb72 | 1255 | } else { |
5cf121c3 | 1256 | tx->flags |= IEEE80211_TX_UNICAST; |
d3707d99 JB |
1257 | if (unlikely(local->wifi_wme_noack_test)) |
1258 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1259 | else | |
1260 | info->flags &= ~IEEE80211_TX_CTL_NO_ACK; | |
badffb72 | 1261 | } |
58d4185e | 1262 | |
5cf121c3 JB |
1263 | if (tx->flags & IEEE80211_TX_FRAGMENTED) { |
1264 | if ((tx->flags & IEEE80211_TX_UNICAST) && | |
b9a5f8ca | 1265 | skb->len + FCS_LEN > local->hw.wiphy->frag_threshold && |
8d5e0d58 | 1266 | !(info->flags & IEEE80211_TX_CTL_AMPDU)) |
5cf121c3 | 1267 | tx->flags |= IEEE80211_TX_FRAGMENTED; |
58d4185e | 1268 | else |
5cf121c3 | 1269 | tx->flags &= ~IEEE80211_TX_FRAGMENTED; |
58d4185e JB |
1270 | } |
1271 | ||
e2ebc74d | 1272 | if (!tx->sta) |
e039fa4a | 1273 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
07346f81 | 1274 | else if (test_and_clear_sta_flags(tx->sta, WLAN_STA_CLEAR_PS_FILT)) |
e039fa4a | 1275 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
58d4185e | 1276 | |
b73d70ad | 1277 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2ebc74d JB |
1278 | if (skb->len > hdrlen + sizeof(rfc1042_header) + 2) { |
1279 | u8 *pos = &skb->data[hdrlen + sizeof(rfc1042_header)]; | |
1280 | tx->ethertype = (pos[0] << 8) | pos[1]; | |
1281 | } | |
e039fa4a | 1282 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1283 | |
9ae54c84 | 1284 | return TX_CONTINUE; |
e2ebc74d JB |
1285 | } |
1286 | ||
2de8e0d9 | 1287 | static int __ieee80211_tx(struct ieee80211_local *local, |
1870cd71 | 1288 | struct sk_buff **skbp, |
3b8d81e0 JB |
1289 | struct sta_info *sta, |
1290 | bool txpending) | |
e2ebc74d | 1291 | { |
1870cd71 | 1292 | struct sk_buff *skb = *skbp, *next; |
f8e79ddd | 1293 | struct ieee80211_tx_info *info; |
5061b0c2 | 1294 | struct ieee80211_sub_if_data *sdata; |
3b8d81e0 | 1295 | unsigned long flags; |
a220858d | 1296 | int ret, len; |
2de8e0d9 | 1297 | bool fragm = false; |
e2ebc74d | 1298 | |
2de8e0d9 | 1299 | while (skb) { |
3b8d81e0 | 1300 | int q = skb_get_queue_mapping(skb); |
e1e54068 | 1301 | __le16 fc; |
3b8d81e0 JB |
1302 | |
1303 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
1304 | ret = IEEE80211_TX_OK; | |
1305 | if (local->queue_stop_reasons[q] || | |
1306 | (!txpending && !skb_queue_empty(&local->pending[q]))) | |
1307 | ret = IEEE80211_TX_PENDING; | |
1308 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
1309 | if (ret != IEEE80211_TX_OK) | |
1310 | return ret; | |
f8e79ddd | 1311 | |
f0e72851 JB |
1312 | info = IEEE80211_SKB_CB(skb); |
1313 | ||
1314 | if (fragm) | |
e6a9854b | 1315 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | |
e039fa4a | 1316 | IEEE80211_TX_CTL_FIRST_FRAGMENT); |
f0e72851 | 1317 | |
2de8e0d9 | 1318 | next = skb->next; |
a220858d | 1319 | len = skb->len; |
5061b0c2 | 1320 | |
ad5351db JB |
1321 | if (next) |
1322 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
1323 | ||
5061b0c2 JB |
1324 | sdata = vif_to_sdata(info->control.vif); |
1325 | ||
1326 | switch (sdata->vif.type) { | |
1327 | case NL80211_IFTYPE_MONITOR: | |
1328 | info->control.vif = NULL; | |
1329 | break; | |
1330 | case NL80211_IFTYPE_AP_VLAN: | |
1331 | info->control.vif = &container_of(sdata->bss, | |
1332 | struct ieee80211_sub_if_data, u.ap)->vif; | |
1333 | break; | |
1334 | default: | |
1335 | /* keep */ | |
1336 | break; | |
1337 | } | |
1338 | ||
ec25acc4 JB |
1339 | if (sta && sta->uploaded) |
1340 | info->control.sta = &sta->sta; | |
1341 | else | |
1342 | info->control.sta = NULL; | |
1343 | ||
e1e54068 | 1344 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
24487981 | 1345 | ret = drv_tx(local, skb); |
a220858d JB |
1346 | if (WARN_ON(ret != NETDEV_TX_OK && skb->len != len)) { |
1347 | dev_kfree_skb(skb); | |
1348 | ret = NETDEV_TX_OK; | |
1349 | } | |
21f5fc75 LR |
1350 | if (ret != NETDEV_TX_OK) { |
1351 | info->control.vif = &sdata->vif; | |
2de8e0d9 | 1352 | return IEEE80211_TX_AGAIN; |
21f5fc75 LR |
1353 | } |
1354 | ||
e1e54068 | 1355 | ieee80211_tpt_led_trig_tx(local, fc, len); |
1870cd71 | 1356 | *skbp = skb = next; |
2de8e0d9 JB |
1357 | ieee80211_led_tx(local, 1); |
1358 | fragm = true; | |
e2ebc74d | 1359 | } |
2de8e0d9 | 1360 | |
e2ebc74d JB |
1361 | return IEEE80211_TX_OK; |
1362 | } | |
1363 | ||
97b045d6 JB |
1364 | /* |
1365 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1366 | * frame was dropped or queued. | |
1367 | */ | |
1368 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) | |
1369 | { | |
97b045d6 | 1370 | struct sk_buff *skb = tx->skb; |
c6fcf6bc | 1371 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
97b045d6 | 1372 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1373 | |
9aa4aee3 JB |
1374 | #define CALL_TXH(txh) \ |
1375 | do { \ | |
1376 | res = txh(tx); \ | |
1377 | if (res != TX_CONTINUE) \ | |
1378 | goto txh_done; \ | |
1379 | } while (0) | |
1380 | ||
5c1b98a5 | 1381 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1382 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1383 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1384 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1385 | CALL_TXH(ieee80211_tx_h_select_key); |
af65cd96 JB |
1386 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1387 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
c6fcf6bc JB |
1388 | |
1389 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) | |
1390 | goto txh_done; | |
1391 | ||
1392 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1393 | CALL_TXH(ieee80211_tx_h_sequence); |
1394 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1395 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1396 | CALL_TXH(ieee80211_tx_h_stats); |
1397 | CALL_TXH(ieee80211_tx_h_encrypt); | |
8fd369ee AN |
1398 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1399 | CALL_TXH(ieee80211_tx_h_calculate_duration); | |
d9e8a70f | 1400 | #undef CALL_TXH |
97b045d6 | 1401 | |
d9e8a70f | 1402 | txh_done: |
97b045d6 | 1403 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1404 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
2de8e0d9 JB |
1405 | while (skb) { |
1406 | struct sk_buff *next; | |
1407 | ||
1408 | next = skb->next; | |
1409 | dev_kfree_skb(skb); | |
1410 | skb = next; | |
1411 | } | |
97b045d6 JB |
1412 | return -1; |
1413 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1414 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1415 | return -1; |
1416 | } | |
1417 | ||
1418 | return 0; | |
1419 | } | |
1420 | ||
3b8d81e0 JB |
1421 | static void ieee80211_tx(struct ieee80211_sub_if_data *sdata, |
1422 | struct sk_buff *skb, bool txpending) | |
e2ebc74d | 1423 | { |
3b8d81e0 | 1424 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1425 | struct ieee80211_tx_data tx; |
97b045d6 | 1426 | ieee80211_tx_result res_prepare; |
e039fa4a | 1427 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
2a577d98 JB |
1428 | struct sk_buff *next; |
1429 | unsigned long flags; | |
1430 | int ret, retries; | |
e2530083 | 1431 | u16 queue; |
e2ebc74d | 1432 | |
e2530083 JB |
1433 | queue = skb_get_queue_mapping(skb); |
1434 | ||
e2ebc74d JB |
1435 | if (unlikely(skb->len < 10)) { |
1436 | dev_kfree_skb(skb); | |
cd8ffc80 | 1437 | return; |
e2ebc74d JB |
1438 | } |
1439 | ||
d0709a65 JB |
1440 | rcu_read_lock(); |
1441 | ||
58d4185e | 1442 | /* initialises tx */ |
3b8d81e0 | 1443 | res_prepare = ieee80211_tx_prepare(sdata, &tx, skb); |
e2ebc74d | 1444 | |
cd8ffc80 | 1445 | if (unlikely(res_prepare == TX_DROP)) { |
e2ebc74d | 1446 | dev_kfree_skb(skb); |
d0709a65 | 1447 | rcu_read_unlock(); |
cd8ffc80 JB |
1448 | return; |
1449 | } else if (unlikely(res_prepare == TX_QUEUED)) { | |
1450 | rcu_read_unlock(); | |
1451 | return; | |
e2ebc74d JB |
1452 | } |
1453 | ||
5cf121c3 | 1454 | tx.channel = local->hw.conf.channel; |
e039fa4a | 1455 | info->band = tx.channel->band; |
e2ebc74d | 1456 | |
97b045d6 JB |
1457 | if (invoke_tx_handlers(&tx)) |
1458 | goto out; | |
e2ebc74d | 1459 | |
2a577d98 JB |
1460 | retries = 0; |
1461 | retry: | |
3b8d81e0 | 1462 | ret = __ieee80211_tx(local, &tx.skb, tx.sta, txpending); |
2a577d98 JB |
1463 | switch (ret) { |
1464 | case IEEE80211_TX_OK: | |
1465 | break; | |
1466 | case IEEE80211_TX_AGAIN: | |
eefce91a JB |
1467 | /* |
1468 | * Since there are no fragmented frames on A-MPDU | |
1469 | * queues, there's no reason for a driver to reject | |
1470 | * a frame there, warn and drop it. | |
1471 | */ | |
2a577d98 JB |
1472 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
1473 | goto drop; | |
1474 | /* fall through */ | |
1475 | case IEEE80211_TX_PENDING: | |
1476 | skb = tx.skb; | |
eefce91a | 1477 | |
2a577d98 | 1478 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
e2ebc74d | 1479 | |
3b8d81e0 JB |
1480 | if (local->queue_stop_reasons[queue] || |
1481 | !skb_queue_empty(&local->pending[queue])) { | |
1482 | /* | |
1483 | * if queue is stopped, queue up frames for later | |
1484 | * transmission from the tasklet | |
1485 | */ | |
2a577d98 JB |
1486 | do { |
1487 | next = skb->next; | |
1488 | skb->next = NULL; | |
cd8ffc80 | 1489 | if (unlikely(txpending)) |
3b8d81e0 JB |
1490 | __skb_queue_head(&local->pending[queue], |
1491 | skb); | |
cd8ffc80 | 1492 | else |
3b8d81e0 JB |
1493 | __skb_queue_tail(&local->pending[queue], |
1494 | skb); | |
2a577d98 JB |
1495 | } while ((skb = next)); |
1496 | ||
2a577d98 JB |
1497 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
1498 | flags); | |
1499 | } else { | |
3b8d81e0 JB |
1500 | /* |
1501 | * otherwise retry, but this is a race condition or | |
1502 | * a driver bug (which we warn about if it persists) | |
1503 | */ | |
2a577d98 JB |
1504 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
1505 | flags); | |
1506 | ||
1507 | retries++; | |
3b8d81e0 | 1508 | if (WARN(retries > 10, "tx refused but queue active\n")) |
2a577d98 | 1509 | goto drop; |
e2ebc74d JB |
1510 | goto retry; |
1511 | } | |
e2ebc74d | 1512 | } |
97b045d6 | 1513 | out: |
d4e46a3d | 1514 | rcu_read_unlock(); |
cd8ffc80 | 1515 | return; |
e2ebc74d JB |
1516 | |
1517 | drop: | |
d4e46a3d | 1518 | rcu_read_unlock(); |
2de8e0d9 JB |
1519 | |
1520 | skb = tx.skb; | |
1521 | while (skb) { | |
2de8e0d9 JB |
1522 | next = skb->next; |
1523 | dev_kfree_skb(skb); | |
1524 | skb = next; | |
1525 | } | |
e2ebc74d JB |
1526 | } |
1527 | ||
1528 | /* device xmit handlers */ | |
1529 | ||
23c0752a JB |
1530 | static int ieee80211_skb_resize(struct ieee80211_local *local, |
1531 | struct sk_buff *skb, | |
1532 | int head_need, bool may_encrypt) | |
1533 | { | |
1534 | int tail_need = 0; | |
1535 | ||
1536 | /* | |
1537 | * This could be optimised, devices that do full hardware | |
1538 | * crypto (including TKIP MMIC) need no tailroom... But we | |
1539 | * have no drivers for such devices currently. | |
1540 | */ | |
1541 | if (may_encrypt) { | |
1542 | tail_need = IEEE80211_ENCRYPT_TAILROOM; | |
1543 | tail_need -= skb_tailroom(skb); | |
1544 | tail_need = max_t(int, tail_need, 0); | |
1545 | } | |
1546 | ||
1547 | if (head_need || tail_need) { | |
1548 | /* Sorry. Can't account for this any more */ | |
1549 | skb_orphan(skb); | |
1550 | } | |
1551 | ||
1552 | if (skb_header_cloned(skb)) | |
1553 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); | |
4cd06a34 | 1554 | else if (head_need || tail_need) |
23c0752a | 1555 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1556 | else |
1557 | return 0; | |
23c0752a JB |
1558 | |
1559 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1560 | wiphy_debug(local->hw.wiphy, |
1561 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1562 | return -ENOMEM; |
1563 | } | |
1564 | ||
1565 | /* update truesize too */ | |
1566 | skb->truesize += head_need + tail_need; | |
1567 | ||
1568 | return 0; | |
1569 | } | |
1570 | ||
3b8d81e0 JB |
1571 | static void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, |
1572 | struct sk_buff *skb) | |
e2ebc74d | 1573 | { |
3b8d81e0 | 1574 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1575 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1576 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
3b8d81e0 | 1577 | struct ieee80211_sub_if_data *tmp_sdata; |
e2ebc74d | 1578 | int headroom; |
23c0752a | 1579 | bool may_encrypt; |
e2ebc74d | 1580 | |
d84f3234 JB |
1581 | rcu_read_lock(); |
1582 | ||
cca89496 | 1583 | if (unlikely(sdata->vif.type == NL80211_IFTYPE_MONITOR)) { |
25d834e1 JB |
1584 | int hdrlen; |
1585 | u16 len_rthdr; | |
1586 | ||
17ad353b FF |
1587 | info->flags |= IEEE80211_TX_CTL_INJECTED | |
1588 | IEEE80211_TX_INTFL_HAS_RADIOTAP; | |
25d834e1 JB |
1589 | |
1590 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
8ef86c7b | 1591 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); |
25d834e1 JB |
1592 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
1593 | ||
1594 | /* check the header is complete in the frame */ | |
1595 | if (likely(skb->len >= len_rthdr + hdrlen)) { | |
1596 | /* | |
1597 | * We process outgoing injected frames that have a | |
1598 | * local address we handle as though they are our | |
1599 | * own frames. | |
1600 | * This code here isn't entirely correct, the local | |
1601 | * MAC address is not necessarily enough to find | |
1602 | * the interface to use; for that proper VLAN/WDS | |
1603 | * support we will need a different mechanism. | |
1604 | */ | |
1605 | ||
3b8d81e0 | 1606 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, |
25d834e1 | 1607 | list) { |
9607e6b6 | 1608 | if (!ieee80211_sdata_running(tmp_sdata)) |
25d834e1 | 1609 | continue; |
7dff3125 JM |
1610 | if (tmp_sdata->vif.type == |
1611 | NL80211_IFTYPE_MONITOR || | |
1612 | tmp_sdata->vif.type == | |
1613 | NL80211_IFTYPE_AP_VLAN || | |
1614 | tmp_sdata->vif.type == | |
1615 | NL80211_IFTYPE_WDS) | |
f1b33cb1 | 1616 | continue; |
47846c9b | 1617 | if (compare_ether_addr(tmp_sdata->vif.addr, |
9b1ce526 | 1618 | hdr->addr2) == 0) { |
3b8d81e0 | 1619 | sdata = tmp_sdata; |
25d834e1 JB |
1620 | break; |
1621 | } | |
1622 | } | |
25d834e1 | 1623 | } |
e32f85f7 LCC |
1624 | } |
1625 | ||
3b8d81e0 | 1626 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1627 | |
3b8d81e0 | 1628 | headroom = local->tx_headroom; |
23c0752a JB |
1629 | if (may_encrypt) |
1630 | headroom += IEEE80211_ENCRYPT_HEADROOM; | |
1631 | headroom -= skb_headroom(skb); | |
1632 | headroom = max_t(int, 0, headroom); | |
1633 | ||
3b8d81e0 | 1634 | if (ieee80211_skb_resize(local, skb, headroom, may_encrypt)) { |
23c0752a | 1635 | dev_kfree_skb(skb); |
d84f3234 | 1636 | rcu_read_unlock(); |
3b8d81e0 | 1637 | return; |
e2ebc74d JB |
1638 | } |
1639 | ||
740c1aa3 | 1640 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1641 | info->control.vif = &sdata->vif; |
e2ebc74d | 1642 | |
cca89496 JC |
1643 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
1644 | ieee80211_is_data(hdr->frame_control) && | |
1645 | !is_multicast_ether_addr(hdr->addr1)) | |
1646 | if (mesh_nexthop_lookup(skb, sdata)) { | |
1647 | /* skb queued: don't free */ | |
d84f3234 | 1648 | rcu_read_unlock(); |
cca89496 JC |
1649 | return; |
1650 | } | |
1651 | ||
cf0277e7 | 1652 | ieee80211_set_qos_hdr(local, skb); |
3b8d81e0 | 1653 | ieee80211_tx(sdata, skb, false); |
d84f3234 | 1654 | rcu_read_unlock(); |
e2ebc74d JB |
1655 | } |
1656 | ||
d0cf9c0d SH |
1657 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1658 | struct net_device *dev) | |
e2ebc74d JB |
1659 | { |
1660 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
47f4d887 | 1661 | struct ieee80211_channel *chan = local->hw.conf.channel; |
e2ebc74d JB |
1662 | struct ieee80211_radiotap_header *prthdr = |
1663 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 1664 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
9b8a74e3 | 1665 | u16 len_rthdr; |
e2ebc74d | 1666 | |
47f4d887 LR |
1667 | /* |
1668 | * Frame injection is not allowed if beaconing is not allowed | |
1669 | * or if we need radar detection. Beaconing is usually not allowed when | |
1670 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
1671 | * Passive scan is also used in world regulatory domains where | |
1672 | * your country is not known and as such it should be treated as | |
1673 | * NO TX unless the channel is explicitly allowed in which case | |
1674 | * your current regulatory domain would not have the passive scan | |
1675 | * flag. | |
1676 | * | |
1677 | * Since AP mode uses monitor interfaces to inject/TX management | |
1678 | * frames we can make AP mode the exception to this rule once it | |
1679 | * supports radar detection as its implementation can deal with | |
1680 | * radar detection by itself. We can do that later by adding a | |
1681 | * monitor flag interfaces used for AP support. | |
1682 | */ | |
1683 | if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR | | |
1684 | IEEE80211_CHAN_PASSIVE_SCAN))) | |
1685 | goto fail; | |
1686 | ||
9b8a74e3 AG |
1687 | /* check for not even having the fixed radiotap header part */ |
1688 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
1689 | goto fail; /* too short to be possibly valid */ | |
1690 | ||
1691 | /* is it a header version we can trust to find length from? */ | |
1692 | if (unlikely(prthdr->it_version)) | |
1693 | goto fail; /* only version 0 is supported */ | |
1694 | ||
1695 | /* then there must be a radiotap header with a length we can use */ | |
1696 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
1697 | ||
1698 | /* does the skb contain enough to deliver on the alleged length? */ | |
1699 | if (unlikely(skb->len < len_rthdr)) | |
1700 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 1701 | |
e2ebc74d JB |
1702 | /* |
1703 | * fix up the pointers accounting for the radiotap | |
1704 | * header still being in there. We are being given | |
1705 | * a precooked IEEE80211 header so no need for | |
1706 | * normal processing | |
1707 | */ | |
9b8a74e3 | 1708 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 1709 | /* |
9b8a74e3 AG |
1710 | * these are just fixed to the end of the rt area since we |
1711 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 1712 | */ |
9b8a74e3 AG |
1713 | skb_set_network_header(skb, len_rthdr); |
1714 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 1715 | |
3b8d81e0 JB |
1716 | memset(info, 0, sizeof(*info)); |
1717 | ||
7351c6bd JB |
1718 | info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; |
1719 | ||
3b8d81e0 JB |
1720 | /* pass the radiotap header up to xmit */ |
1721 | ieee80211_xmit(IEEE80211_DEV_TO_SUB_IF(dev), skb); | |
e2ebc74d | 1722 | return NETDEV_TX_OK; |
9b8a74e3 AG |
1723 | |
1724 | fail: | |
1725 | dev_kfree_skb(skb); | |
1726 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
1727 | } |
1728 | ||
1729 | /** | |
1730 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type | |
1731 | * subinterfaces (wlan#, WDS, and VLAN interfaces) | |
1732 | * @skb: packet to be sent | |
1733 | * @dev: incoming interface | |
1734 | * | |
1735 | * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will | |
1736 | * not be freed, and caller is responsible for either retrying later or freeing | |
1737 | * skb). | |
1738 | * | |
1739 | * This function takes in an Ethernet header and encapsulates it with suitable | |
1740 | * IEEE 802.11 header based on which interface the packet is coming in. The | |
1741 | * encapsulated packet will then be passed to master interface, wlan#.11, for | |
1742 | * transmission (through low-level driver). | |
1743 | */ | |
d0cf9c0d SH |
1744 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
1745 | struct net_device *dev) | |
e2ebc74d | 1746 | { |
133b8226 JB |
1747 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
1748 | struct ieee80211_local *local = sdata->local; | |
489ee919 | 1749 | struct ieee80211_tx_info *info; |
5b548140 | 1750 | int ret = NETDEV_TX_BUSY, head_need; |
065e9605 HH |
1751 | u16 ethertype, hdrlen, meshhdrlen = 0; |
1752 | __le16 fc; | |
e2ebc74d | 1753 | struct ieee80211_hdr hdr; |
ff67bb86 | 1754 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
0a65169b | 1755 | struct mesh_path __maybe_unused *mppath = NULL; |
e2ebc74d JB |
1756 | const u8 *encaps_data; |
1757 | int encaps_len, skip_header_bytes; | |
e8bf9649 | 1758 | int nh_pos, h_pos; |
f14543ee | 1759 | struct sta_info *sta = NULL; |
ce3edf6d | 1760 | u32 sta_flags = 0; |
7e244707 | 1761 | struct sk_buff *tmp_skb; |
e2ebc74d | 1762 | |
e2ebc74d | 1763 | if (unlikely(skb->len < ETH_HLEN)) { |
ec634fe3 | 1764 | ret = NETDEV_TX_OK; |
e2ebc74d JB |
1765 | goto fail; |
1766 | } | |
1767 | ||
e2ebc74d JB |
1768 | /* convert Ethernet header to proper 802.11 header (based on |
1769 | * operation mode) */ | |
1770 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 1771 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 1772 | |
51fb61e7 | 1773 | switch (sdata->vif.type) { |
05c914fe | 1774 | case NL80211_IFTYPE_AP_VLAN: |
f14543ee | 1775 | rcu_read_lock(); |
9bc383de | 1776 | sta = rcu_dereference(sdata->u.vlan.sta); |
f14543ee FF |
1777 | if (sta) { |
1778 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
1779 | /* RA TA DA SA */ | |
1780 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 1781 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1782 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1783 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1784 | hdrlen = 30; | |
1785 | sta_flags = get_sta_flags(sta); | |
1786 | } | |
1787 | rcu_read_unlock(); | |
1788 | if (sta) | |
1789 | break; | |
1790 | /* fall through */ | |
1791 | case NL80211_IFTYPE_AP: | |
065e9605 | 1792 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
1793 | /* DA BSSID SA */ |
1794 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 1795 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1796 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
1797 | hdrlen = 24; | |
cf966838 | 1798 | break; |
05c914fe | 1799 | case NL80211_IFTYPE_WDS: |
065e9605 | 1800 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
1801 | /* RA TA DA SA */ |
1802 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 1803 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1804 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1805 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1806 | hdrlen = 30; | |
cf966838 | 1807 | break; |
33b64eb2 | 1808 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 1809 | case NL80211_IFTYPE_MESH_POINT: |
472dbc45 | 1810 | if (!sdata->u.mesh.mshcfg.dot11MeshTTL) { |
e32f85f7 | 1811 | /* Do not send frames with mesh_ttl == 0 */ |
472dbc45 | 1812 | sdata->u.mesh.mshstats.dropped_frames_ttl++; |
ec634fe3 | 1813 | ret = NETDEV_TX_OK; |
e32f85f7 | 1814 | goto fail; |
33b64eb2 | 1815 | } |
f76b57b4 JF |
1816 | if (!is_multicast_ether_addr(skb->data)) |
1817 | mppath = mpp_path_lookup(skb->data, sdata); | |
79617dee | 1818 | |
f76b57b4 | 1819 | /* |
9d52501b JF |
1820 | * Use address extension if it is a packet from |
1821 | * another interface or if we know the destination | |
1822 | * is being proxied by a portal (i.e. portal address | |
1823 | * differs from proxied address) | |
f76b57b4 | 1824 | */ |
47846c9b | 1825 | if (compare_ether_addr(sdata->vif.addr, |
f76b57b4 | 1826 | skb->data + ETH_ALEN) == 0 && |
9d52501b | 1827 | !(mppath && compare_ether_addr(mppath->mpp, skb->data))) { |
3c5772a5 JC |
1828 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
1829 | skb->data, skb->data + ETH_ALEN); | |
1830 | meshhdrlen = ieee80211_new_mesh_header(&mesh_hdr, | |
61ad5394 | 1831 | sdata, NULL, NULL); |
79617dee | 1832 | } else { |
3c5772a5 | 1833 | int is_mesh_mcast = 1; |
15ff6365 | 1834 | const u8 *mesh_da; |
79617dee | 1835 | |
3c5772a5 | 1836 | rcu_read_lock(); |
79617dee | 1837 | if (is_multicast_ether_addr(skb->data)) |
3c5772a5 JC |
1838 | /* DA TA mSA AE:SA */ |
1839 | mesh_da = skb->data; | |
79617dee | 1840 | else { |
15ff6365 JB |
1841 | static const u8 bcast[ETH_ALEN] = |
1842 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; | |
3c5772a5 JC |
1843 | if (mppath) { |
1844 | /* RA TA mDA mSA AE:DA SA */ | |
1845 | mesh_da = mppath->mpp; | |
1846 | is_mesh_mcast = 0; | |
15ff6365 | 1847 | } else { |
3c5772a5 | 1848 | /* DA TA mSA AE:SA */ |
15ff6365 JB |
1849 | mesh_da = bcast; |
1850 | } | |
79617dee | 1851 | } |
3c5772a5 | 1852 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 1853 | mesh_da, sdata->vif.addr); |
3c5772a5 JC |
1854 | rcu_read_unlock(); |
1855 | if (is_mesh_mcast) | |
1856 | meshhdrlen = | |
1857 | ieee80211_new_mesh_header(&mesh_hdr, | |
1858 | sdata, | |
1859 | skb->data + ETH_ALEN, | |
3c5772a5 JC |
1860 | NULL); |
1861 | else | |
1862 | meshhdrlen = | |
1863 | ieee80211_new_mesh_header(&mesh_hdr, | |
1864 | sdata, | |
3c5772a5 JC |
1865 | skb->data, |
1866 | skb->data + ETH_ALEN); | |
79617dee | 1867 | |
79617dee | 1868 | } |
33b64eb2 LCC |
1869 | break; |
1870 | #endif | |
05c914fe | 1871 | case NL80211_IFTYPE_STATION: |
46900298 | 1872 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
a621fa4d JB |
1873 | if (sdata->u.mgd.use_4addr && |
1874 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
f14543ee FF |
1875 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
1876 | /* RA TA DA SA */ | |
47846c9b | 1877 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1878 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1879 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1880 | hdrlen = 30; | |
1881 | } else { | |
1882 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
1883 | /* BSSID SA DA */ | |
1884 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1885 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
1886 | hdrlen = 24; | |
1887 | } | |
cf966838 | 1888 | break; |
05c914fe | 1889 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
1890 | /* DA SA BSSID */ |
1891 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1892 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 1893 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 1894 | hdrlen = 24; |
cf966838 JB |
1895 | break; |
1896 | default: | |
ec634fe3 | 1897 | ret = NETDEV_TX_OK; |
e2ebc74d JB |
1898 | goto fail; |
1899 | } | |
1900 | ||
7d185b8b JB |
1901 | /* |
1902 | * There's no need to try to look up the destination | |
1903 | * if it is a multicast address (which can only happen | |
1904 | * in AP mode) | |
1905 | */ | |
1906 | if (!is_multicast_ether_addr(hdr.addr1)) { | |
d0709a65 | 1907 | rcu_read_lock(); |
abe60632 JB |
1908 | sta = sta_info_get(sdata, hdr.addr1); |
1909 | if (sta) | |
07346f81 | 1910 | sta_flags = get_sta_flags(sta); |
d0709a65 | 1911 | rcu_read_unlock(); |
e2ebc74d JB |
1912 | } |
1913 | ||
3434fbd3 | 1914 | /* receiver and we are QoS enabled, use a QoS type frame */ |
176be728 | 1915 | if ((sta_flags & WLAN_STA_WME) && local->hw.queues >= 4) { |
065e9605 | 1916 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
1917 | hdrlen += 2; |
1918 | } | |
1919 | ||
1920 | /* | |
238814fd JB |
1921 | * Drop unicast frames to unauthorised stations unless they are |
1922 | * EAPOL frames from the local station. | |
ce3edf6d | 1923 | */ |
e32f85f7 LCC |
1924 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
1925 | unlikely(!is_multicast_ether_addr(hdr.addr1) && | |
33b64eb2 | 1926 | !(sta_flags & WLAN_STA_AUTHORIZED) && |
a621fa4d | 1927 | !(cpu_to_be16(ethertype) == sdata->control_port_protocol && |
47846c9b | 1928 | compare_ether_addr(sdata->vif.addr, |
ce3edf6d JB |
1929 | skb->data + ETH_ALEN) == 0))) { |
1930 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
ce3edf6d | 1931 | if (net_ratelimit()) |
0c68ae26 | 1932 | printk(KERN_DEBUG "%s: dropped frame to %pM" |
ce3edf6d | 1933 | " (unauthorized port)\n", dev->name, |
0c68ae26 | 1934 | hdr.addr1); |
ce3edf6d JB |
1935 | #endif |
1936 | ||
1937 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
1938 | ||
ec634fe3 | 1939 | ret = NETDEV_TX_OK; |
ce3edf6d JB |
1940 | goto fail; |
1941 | } | |
1942 | ||
7e244707 HS |
1943 | /* |
1944 | * If the skb is shared we need to obtain our own copy. | |
1945 | */ | |
1946 | if (skb_shared(skb)) { | |
1947 | tmp_skb = skb; | |
f8a0a781 | 1948 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
1949 | kfree_skb(tmp_skb); |
1950 | ||
1951 | if (!skb) { | |
1952 | ret = NETDEV_TX_OK; | |
1953 | goto fail; | |
1954 | } | |
1955 | } | |
1956 | ||
065e9605 | 1957 | hdr.frame_control = fc; |
e2ebc74d JB |
1958 | hdr.duration_id = 0; |
1959 | hdr.seq_ctrl = 0; | |
1960 | ||
1961 | skip_header_bytes = ETH_HLEN; | |
1962 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
1963 | encaps_data = bridge_tunnel_header; | |
1964 | encaps_len = sizeof(bridge_tunnel_header); | |
1965 | skip_header_bytes -= 2; | |
1966 | } else if (ethertype >= 0x600) { | |
1967 | encaps_data = rfc1042_header; | |
1968 | encaps_len = sizeof(rfc1042_header); | |
1969 | skip_header_bytes -= 2; | |
1970 | } else { | |
1971 | encaps_data = NULL; | |
1972 | encaps_len = 0; | |
1973 | } | |
1974 | ||
7e244707 HS |
1975 | nh_pos = skb_network_header(skb) - skb->data; |
1976 | h_pos = skb_transport_header(skb) - skb->data; | |
1977 | ||
e2ebc74d JB |
1978 | skb_pull(skb, skip_header_bytes); |
1979 | nh_pos -= skip_header_bytes; | |
1980 | h_pos -= skip_header_bytes; | |
1981 | ||
23c0752a | 1982 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 1983 | |
23c0752a JB |
1984 | /* |
1985 | * So we need to modify the skb header and hence need a copy of | |
1986 | * that. The head_need variable above doesn't, so far, include | |
1987 | * the needed header space that we don't need right away. If we | |
1988 | * can, then we don't reallocate right now but only after the | |
1989 | * frame arrives at the master device (if it does...) | |
1990 | * | |
1991 | * If we cannot, however, then we will reallocate to include all | |
1992 | * the ever needed space. Also, if we need to reallocate it anyway, | |
1993 | * make it big enough for everything we may ever need. | |
1994 | */ | |
e2ebc74d | 1995 | |
3a5be7d4 | 1996 | if (head_need > 0 || skb_cloned(skb)) { |
23c0752a JB |
1997 | head_need += IEEE80211_ENCRYPT_HEADROOM; |
1998 | head_need += local->tx_headroom; | |
1999 | head_need = max_t(int, 0, head_need); | |
2000 | if (ieee80211_skb_resize(local, skb, head_need, true)) | |
e2ebc74d | 2001 | goto fail; |
e2ebc74d JB |
2002 | } |
2003 | ||
2004 | if (encaps_data) { | |
2005 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
2006 | nh_pos += encaps_len; | |
2007 | h_pos += encaps_len; | |
2008 | } | |
c29b9b9b | 2009 | |
e4ab7eb0 | 2010 | #ifdef CONFIG_MAC80211_MESH |
33b64eb2 LCC |
2011 | if (meshhdrlen > 0) { |
2012 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); | |
2013 | nh_pos += meshhdrlen; | |
2014 | h_pos += meshhdrlen; | |
2015 | } | |
e4ab7eb0 | 2016 | #endif |
33b64eb2 | 2017 | |
065e9605 | 2018 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2019 | __le16 *qos_control; |
2020 | ||
2021 | qos_control = (__le16*) skb_push(skb, 2); | |
2022 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); | |
2023 | /* | |
2024 | * Maybe we could actually set some fields here, for now just | |
2025 | * initialise to zero to indicate no special operation. | |
2026 | */ | |
2027 | *qos_control = 0; | |
2028 | } else | |
2029 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2030 | ||
e2ebc74d JB |
2031 | nh_pos += hdrlen; |
2032 | h_pos += hdrlen; | |
2033 | ||
68aae116 SH |
2034 | dev->stats.tx_packets++; |
2035 | dev->stats.tx_bytes += skb->len; | |
e2ebc74d JB |
2036 | |
2037 | /* Update skb pointers to various headers since this modified frame | |
2038 | * is going to go through Linux networking code that may potentially | |
2039 | * need things like pointer to IP header. */ | |
2040 | skb_set_mac_header(skb, 0); | |
2041 | skb_set_network_header(skb, nh_pos); | |
2042 | skb_set_transport_header(skb, h_pos); | |
2043 | ||
489ee919 | 2044 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2045 | memset(info, 0, sizeof(*info)); |
2046 | ||
e2ebc74d | 2047 | dev->trans_start = jiffies; |
3b8d81e0 | 2048 | ieee80211_xmit(sdata, skb); |
e2ebc74d | 2049 | |
ec634fe3 | 2050 | return NETDEV_TX_OK; |
e2ebc74d JB |
2051 | |
2052 | fail: | |
ec634fe3 | 2053 | if (ret == NETDEV_TX_OK) |
e2ebc74d JB |
2054 | dev_kfree_skb(skb); |
2055 | ||
2056 | return ret; | |
2057 | } | |
2058 | ||
e2ebc74d | 2059 | |
e2530083 JB |
2060 | /* |
2061 | * ieee80211_clear_tx_pending may not be called in a context where | |
2062 | * it is possible that it packets could come in again. | |
2063 | */ | |
e2ebc74d JB |
2064 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
2065 | { | |
2de8e0d9 | 2066 | int i; |
e2ebc74d | 2067 | |
2a577d98 JB |
2068 | for (i = 0; i < local->hw.queues; i++) |
2069 | skb_queue_purge(&local->pending[i]); | |
e2ebc74d JB |
2070 | } |
2071 | ||
cd8ffc80 JB |
2072 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
2073 | struct sk_buff *skb) | |
2074 | { | |
2075 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2076 | struct ieee80211_sub_if_data *sdata; | |
2077 | struct sta_info *sta; | |
2078 | struct ieee80211_hdr *hdr; | |
cd8ffc80 JB |
2079 | int ret; |
2080 | bool result = true; | |
2081 | ||
5061b0c2 | 2082 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
2083 | |
2084 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
5061b0c2 | 2085 | ieee80211_tx(sdata, skb, true); |
cd8ffc80 JB |
2086 | } else { |
2087 | hdr = (struct ieee80211_hdr *)skb->data; | |
abe60632 | 2088 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 2089 | |
3b8d81e0 | 2090 | ret = __ieee80211_tx(local, &skb, sta, true); |
cd8ffc80 JB |
2091 | if (ret != IEEE80211_TX_OK) |
2092 | result = false; | |
2093 | } | |
2094 | ||
cd8ffc80 JB |
2095 | return result; |
2096 | } | |
2097 | ||
e2530083 | 2098 | /* |
3b8d81e0 | 2099 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 2100 | */ |
e2ebc74d JB |
2101 | void ieee80211_tx_pending(unsigned long data) |
2102 | { | |
2103 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
7236fe29 | 2104 | struct ieee80211_sub_if_data *sdata; |
2a577d98 | 2105 | unsigned long flags; |
cd8ffc80 | 2106 | int i; |
3b8d81e0 | 2107 | bool txok; |
e2ebc74d | 2108 | |
f0e72851 | 2109 | rcu_read_lock(); |
e2530083 | 2110 | |
3b8d81e0 | 2111 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
2112 | for (i = 0; i < local->hw.queues; i++) { |
2113 | /* | |
2114 | * If queue is stopped by something other than due to pending | |
2115 | * frames, or we have no pending frames, proceed to next queue. | |
2116 | */ | |
3b8d81e0 | 2117 | if (local->queue_stop_reasons[i] || |
2a577d98 | 2118 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 2119 | continue; |
e2530083 | 2120 | |
2a577d98 | 2121 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 2122 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 2123 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 2124 | |
a7bc376c JB |
2125 | if (WARN_ON(!info->control.vif)) { |
2126 | kfree_skb(skb); | |
2127 | continue; | |
2128 | } | |
2129 | ||
3b8d81e0 JB |
2130 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
2131 | flags); | |
2132 | ||
2133 | txok = ieee80211_tx_pending_skb(local, skb); | |
2134 | if (!txok) | |
2135 | __skb_queue_head(&local->pending[i], skb); | |
2136 | spin_lock_irqsave(&local->queue_stop_reason_lock, | |
2137 | flags); | |
2138 | if (!txok) | |
2a577d98 | 2139 | break; |
e2ebc74d | 2140 | } |
7236fe29 JB |
2141 | |
2142 | if (skb_queue_empty(&local->pending[i])) | |
2143 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2337db8d | 2144 | netif_wake_subqueue(sdata->dev, i); |
e2ebc74d | 2145 | } |
3b8d81e0 | 2146 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 2147 | |
f0e72851 | 2148 | rcu_read_unlock(); |
e2ebc74d JB |
2149 | } |
2150 | ||
2151 | /* functions for drivers to get certain frames */ | |
2152 | ||
8e7be8da | 2153 | static void ieee80211_beacon_add_tim(struct ieee80211_if_ap *bss, |
5dfdaf58 JB |
2154 | struct sk_buff *skb, |
2155 | struct beacon_data *beacon) | |
e2ebc74d JB |
2156 | { |
2157 | u8 *pos, *tim; | |
2158 | int aid0 = 0; | |
2159 | int i, have_bits = 0, n1, n2; | |
2160 | ||
2161 | /* Generate bitmap for TIM only if there are any STAs in power save | |
2162 | * mode. */ | |
e2ebc74d JB |
2163 | if (atomic_read(&bss->num_sta_ps) > 0) |
2164 | /* in the hope that this is faster than | |
2165 | * checking byte-for-byte */ | |
2166 | have_bits = !bitmap_empty((unsigned long*)bss->tim, | |
2167 | IEEE80211_MAX_AID+1); | |
2168 | ||
2169 | if (bss->dtim_count == 0) | |
5dfdaf58 | 2170 | bss->dtim_count = beacon->dtim_period - 1; |
e2ebc74d JB |
2171 | else |
2172 | bss->dtim_count--; | |
2173 | ||
2174 | tim = pos = (u8 *) skb_put(skb, 6); | |
2175 | *pos++ = WLAN_EID_TIM; | |
2176 | *pos++ = 4; | |
2177 | *pos++ = bss->dtim_count; | |
5dfdaf58 | 2178 | *pos++ = beacon->dtim_period; |
e2ebc74d JB |
2179 | |
2180 | if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf)) | |
2181 | aid0 = 1; | |
2182 | ||
512119b3 CL |
2183 | bss->dtim_bc_mc = aid0 == 1; |
2184 | ||
e2ebc74d JB |
2185 | if (have_bits) { |
2186 | /* Find largest even number N1 so that bits numbered 1 through | |
2187 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
2188 | * (N2 + 1) x 8 through 2007 are 0. */ | |
2189 | n1 = 0; | |
2190 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
2191 | if (bss->tim[i]) { | |
2192 | n1 = i & 0xfe; | |
2193 | break; | |
2194 | } | |
2195 | } | |
2196 | n2 = n1; | |
2197 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
2198 | if (bss->tim[i]) { | |
2199 | n2 = i; | |
2200 | break; | |
2201 | } | |
2202 | } | |
2203 | ||
2204 | /* Bitmap control */ | |
2205 | *pos++ = n1 | aid0; | |
2206 | /* Part Virt Bitmap */ | |
2207 | memcpy(pos, bss->tim + n1, n2 - n1 + 1); | |
2208 | ||
2209 | tim[1] = n2 - n1 + 4; | |
2210 | skb_put(skb, n2 - n1); | |
2211 | } else { | |
2212 | *pos++ = aid0; /* Bitmap control */ | |
2213 | *pos++ = 0; /* Part Virt Bitmap */ | |
2214 | } | |
e2ebc74d JB |
2215 | } |
2216 | ||
eddcbb94 JB |
2217 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, |
2218 | struct ieee80211_vif *vif, | |
2219 | u16 *tim_offset, u16 *tim_length) | |
e2ebc74d JB |
2220 | { |
2221 | struct ieee80211_local *local = hw_to_local(hw); | |
9d139c81 | 2222 | struct sk_buff *skb = NULL; |
e039fa4a | 2223 | struct ieee80211_tx_info *info; |
e2ebc74d JB |
2224 | struct ieee80211_sub_if_data *sdata = NULL; |
2225 | struct ieee80211_if_ap *ap = NULL; | |
5dfdaf58 | 2226 | struct beacon_data *beacon; |
8318d78a | 2227 | struct ieee80211_supported_band *sband; |
2e92e6f2 | 2228 | enum ieee80211_band band = local->hw.conf.channel->band; |
e00cfce0 | 2229 | struct ieee80211_tx_rate_control txrc; |
8318d78a | 2230 | |
2e92e6f2 | 2231 | sband = local->hw.wiphy->bands[band]; |
5dfdaf58 JB |
2232 | |
2233 | rcu_read_lock(); | |
e2ebc74d | 2234 | |
32bfd35d | 2235 | sdata = vif_to_sdata(vif); |
e2ebc74d | 2236 | |
eb3e554b FF |
2237 | if (!ieee80211_sdata_running(sdata)) |
2238 | goto out; | |
2239 | ||
eddcbb94 JB |
2240 | if (tim_offset) |
2241 | *tim_offset = 0; | |
2242 | if (tim_length) | |
2243 | *tim_length = 0; | |
2244 | ||
05c914fe | 2245 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
33b64eb2 LCC |
2246 | ap = &sdata->u.ap; |
2247 | beacon = rcu_dereference(ap->beacon); | |
3ad97fbc | 2248 | if (beacon) { |
902acc78 JB |
2249 | /* |
2250 | * headroom, head length, | |
2251 | * tail length and maximum TIM length | |
2252 | */ | |
2253 | skb = dev_alloc_skb(local->tx_headroom + | |
2254 | beacon->head_len + | |
2255 | beacon->tail_len + 256); | |
2256 | if (!skb) | |
2257 | goto out; | |
33b64eb2 | 2258 | |
902acc78 JB |
2259 | skb_reserve(skb, local->tx_headroom); |
2260 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
2261 | beacon->head_len); | |
33b64eb2 | 2262 | |
d0709a65 JB |
2263 | /* |
2264 | * Not very nice, but we want to allow the driver to call | |
2265 | * ieee80211_beacon_get() as a response to the set_tim() | |
2266 | * callback. That, however, is already invoked under the | |
2267 | * sta_lock to guarantee consistent and race-free update | |
2268 | * of the tim bitmap in mac80211 and the driver. | |
2269 | */ | |
2270 | if (local->tim_in_locked_section) { | |
8e7be8da | 2271 | ieee80211_beacon_add_tim(ap, skb, beacon); |
d0709a65 JB |
2272 | } else { |
2273 | unsigned long flags; | |
2274 | ||
2275 | spin_lock_irqsave(&local->sta_lock, flags); | |
8e7be8da | 2276 | ieee80211_beacon_add_tim(ap, skb, beacon); |
d0709a65 JB |
2277 | spin_unlock_irqrestore(&local->sta_lock, flags); |
2278 | } | |
33b64eb2 | 2279 | |
eddcbb94 JB |
2280 | if (tim_offset) |
2281 | *tim_offset = beacon->head_len; | |
2282 | if (tim_length) | |
2283 | *tim_length = skb->len - beacon->head_len; | |
2284 | ||
902acc78 JB |
2285 | if (beacon->tail) |
2286 | memcpy(skb_put(skb, beacon->tail_len), | |
2287 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
2288 | } else |
2289 | goto out; | |
05c914fe | 2290 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 2291 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 2292 | struct ieee80211_hdr *hdr; |
af8cdcd8 | 2293 | struct sk_buff *presp = rcu_dereference(ifibss->presp); |
33b64eb2 | 2294 | |
af8cdcd8 | 2295 | if (!presp) |
9d139c81 JB |
2296 | goto out; |
2297 | ||
af8cdcd8 | 2298 | skb = skb_copy(presp, GFP_ATOMIC); |
9d139c81 JB |
2299 | if (!skb) |
2300 | goto out; | |
2301 | ||
2302 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
2303 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2304 | IEEE80211_STYPE_BEACON); | |
902acc78 | 2305 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
472dbc45 JB |
2306 | struct ieee80211_mgmt *mgmt; |
2307 | u8 *pos; | |
2308 | ||
ac1bd846 JB |
2309 | #ifdef CONFIG_MAC80211_MESH |
2310 | if (!sdata->u.mesh.mesh_id_len) | |
2311 | goto out; | |
2312 | #endif | |
2313 | ||
902acc78 | 2314 | /* headroom, head length, tail length and maximum TIM length */ |
c80d545d JC |
2315 | skb = dev_alloc_skb(local->tx_headroom + 400 + |
2316 | sdata->u.mesh.vendor_ie_len); | |
902acc78 JB |
2317 | if (!skb) |
2318 | goto out; | |
2319 | ||
2320 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2321 | mgmt = (struct ieee80211_mgmt *) | |
2322 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
2323 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
065e9605 HH |
2324 | mgmt->frame_control = |
2325 | cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON); | |
902acc78 | 2326 | memset(mgmt->da, 0xff, ETH_ALEN); |
47846c9b JB |
2327 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
2328 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
902acc78 | 2329 | mgmt->u.beacon.beacon_int = |
57c4d7b4 | 2330 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); |
902acc78 JB |
2331 | mgmt->u.beacon.capab_info = 0x0; /* 0x0 for MPs */ |
2332 | ||
2333 | pos = skb_put(skb, 2); | |
2334 | *pos++ = WLAN_EID_SSID; | |
2335 | *pos++ = 0x0; | |
2336 | ||
f698d856 | 2337 | mesh_mgmt_ies_add(skb, sdata); |
9d139c81 JB |
2338 | } else { |
2339 | WARN_ON(1); | |
5dfdaf58 | 2340 | goto out; |
e2ebc74d JB |
2341 | } |
2342 | ||
e039fa4a JB |
2343 | info = IEEE80211_SKB_CB(skb); |
2344 | ||
3b8d81e0 | 2345 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 2346 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 2347 | info->band = band; |
e00cfce0 JM |
2348 | |
2349 | memset(&txrc, 0, sizeof(txrc)); | |
2350 | txrc.hw = hw; | |
2351 | txrc.sband = sband; | |
2352 | txrc.bss_conf = &sdata->vif.bss_conf; | |
2353 | txrc.skb = skb; | |
2354 | txrc.reported_rate.idx = -1; | |
37eb0b16 JM |
2355 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
2356 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) | |
2357 | txrc.max_rate_idx = -1; | |
2358 | else | |
2359 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
8f0729b1 | 2360 | txrc.bss = true; |
e00cfce0 | 2361 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
2362 | |
2363 | info->control.vif = vif; | |
f591fa5d | 2364 | |
a472e71b JL |
2365 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
2366 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
2367 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 2368 | out: |
5dfdaf58 | 2369 | rcu_read_unlock(); |
e2ebc74d JB |
2370 | return skb; |
2371 | } | |
eddcbb94 | 2372 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 2373 | |
7044cc56 KV |
2374 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
2375 | struct ieee80211_vif *vif) | |
2376 | { | |
2377 | struct ieee80211_sub_if_data *sdata; | |
2378 | struct ieee80211_if_managed *ifmgd; | |
2379 | struct ieee80211_pspoll *pspoll; | |
2380 | struct ieee80211_local *local; | |
2381 | struct sk_buff *skb; | |
2382 | ||
2383 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2384 | return NULL; | |
2385 | ||
2386 | sdata = vif_to_sdata(vif); | |
2387 | ifmgd = &sdata->u.mgd; | |
2388 | local = sdata->local; | |
2389 | ||
2390 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
2391 | if (!skb) { | |
2392 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
2393 | "pspoll template\n", sdata->name); | |
2394 | return NULL; | |
2395 | } | |
2396 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2397 | ||
2398 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
2399 | memset(pspoll, 0, sizeof(*pspoll)); | |
2400 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
2401 | IEEE80211_STYPE_PSPOLL); | |
2402 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
2403 | ||
2404 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
2405 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
2406 | ||
2407 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
2408 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
2409 | ||
2410 | return skb; | |
2411 | } | |
2412 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
2413 | ||
2414 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
2415 | struct ieee80211_vif *vif) | |
2416 | { | |
2417 | struct ieee80211_hdr_3addr *nullfunc; | |
2418 | struct ieee80211_sub_if_data *sdata; | |
2419 | struct ieee80211_if_managed *ifmgd; | |
2420 | struct ieee80211_local *local; | |
2421 | struct sk_buff *skb; | |
2422 | ||
2423 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2424 | return NULL; | |
2425 | ||
2426 | sdata = vif_to_sdata(vif); | |
2427 | ifmgd = &sdata->u.mgd; | |
2428 | local = sdata->local; | |
2429 | ||
2430 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
2431 | if (!skb) { | |
2432 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
2433 | "template\n", sdata->name); | |
2434 | return NULL; | |
2435 | } | |
2436 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2437 | ||
2438 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
2439 | sizeof(*nullfunc)); | |
2440 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
2441 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
2442 | IEEE80211_STYPE_NULLFUNC | | |
2443 | IEEE80211_FCTL_TODS); | |
2444 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
2445 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
2446 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
2447 | ||
2448 | return skb; | |
2449 | } | |
2450 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
2451 | ||
05e54ea6 KV |
2452 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
2453 | struct ieee80211_vif *vif, | |
2454 | const u8 *ssid, size_t ssid_len, | |
2455 | const u8 *ie, size_t ie_len) | |
2456 | { | |
2457 | struct ieee80211_sub_if_data *sdata; | |
2458 | struct ieee80211_local *local; | |
2459 | struct ieee80211_hdr_3addr *hdr; | |
2460 | struct sk_buff *skb; | |
2461 | size_t ie_ssid_len; | |
2462 | u8 *pos; | |
2463 | ||
2464 | sdata = vif_to_sdata(vif); | |
2465 | local = sdata->local; | |
2466 | ie_ssid_len = 2 + ssid_len; | |
2467 | ||
2468 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
2469 | ie_ssid_len + ie_len); | |
2470 | if (!skb) { | |
2471 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
2472 | "request template\n", sdata->name); | |
2473 | return NULL; | |
2474 | } | |
2475 | ||
2476 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2477 | ||
2478 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
2479 | memset(hdr, 0, sizeof(*hdr)); | |
2480 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
2481 | IEEE80211_STYPE_PROBE_REQ); | |
2482 | memset(hdr->addr1, 0xff, ETH_ALEN); | |
2483 | memcpy(hdr->addr2, vif->addr, ETH_ALEN); | |
2484 | memset(hdr->addr3, 0xff, ETH_ALEN); | |
2485 | ||
2486 | pos = skb_put(skb, ie_ssid_len); | |
2487 | *pos++ = WLAN_EID_SSID; | |
2488 | *pos++ = ssid_len; | |
2489 | if (ssid) | |
2490 | memcpy(pos, ssid, ssid_len); | |
2491 | pos += ssid_len; | |
2492 | ||
2493 | if (ie) { | |
2494 | pos = skb_put(skb, ie_len); | |
2495 | memcpy(pos, ie, ie_len); | |
2496 | } | |
2497 | ||
2498 | return skb; | |
2499 | } | |
2500 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
2501 | ||
32bfd35d | 2502 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2503 | const void *frame, size_t frame_len, |
e039fa4a | 2504 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2505 | struct ieee80211_rts *rts) |
2506 | { | |
2507 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2508 | |
065e9605 HH |
2509 | rts->frame_control = |
2510 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
2511 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
2512 | frame_txctl); | |
e2ebc74d JB |
2513 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
2514 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
2515 | } | |
2516 | EXPORT_SYMBOL(ieee80211_rts_get); | |
2517 | ||
32bfd35d | 2518 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2519 | const void *frame, size_t frame_len, |
e039fa4a | 2520 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2521 | struct ieee80211_cts *cts) |
2522 | { | |
2523 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2524 | |
065e9605 HH |
2525 | cts->frame_control = |
2526 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
2527 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
2528 | frame_len, frame_txctl); | |
e2ebc74d JB |
2529 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
2530 | } | |
2531 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
2532 | ||
2533 | struct sk_buff * | |
32bfd35d | 2534 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 2535 | struct ieee80211_vif *vif) |
e2ebc74d JB |
2536 | { |
2537 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 2538 | struct sk_buff *skb = NULL; |
e2ebc74d | 2539 | struct sta_info *sta; |
5cf121c3 | 2540 | struct ieee80211_tx_data tx; |
e2ebc74d JB |
2541 | struct ieee80211_sub_if_data *sdata; |
2542 | struct ieee80211_if_ap *bss = NULL; | |
5dfdaf58 | 2543 | struct beacon_data *beacon; |
e039fa4a | 2544 | struct ieee80211_tx_info *info; |
e2ebc74d | 2545 | |
32bfd35d | 2546 | sdata = vif_to_sdata(vif); |
747cf5e9 | 2547 | bss = &sdata->u.ap; |
5dfdaf58 | 2548 | |
5dfdaf58 JB |
2549 | rcu_read_lock(); |
2550 | beacon = rcu_dereference(bss->beacon); | |
2551 | ||
05c914fe | 2552 | if (sdata->vif.type != NL80211_IFTYPE_AP || !beacon || !beacon->head) |
747cf5e9 | 2553 | goto out; |
5dfdaf58 | 2554 | |
512119b3 | 2555 | if (bss->dtim_count != 0 || !bss->dtim_bc_mc) |
747cf5e9 | 2556 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 2557 | |
e2ebc74d JB |
2558 | while (1) { |
2559 | skb = skb_dequeue(&bss->ps_bc_buf); | |
2560 | if (!skb) | |
747cf5e9 | 2561 | goto out; |
e2ebc74d JB |
2562 | local->total_ps_buffered--; |
2563 | ||
2564 | if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) { | |
2565 | struct ieee80211_hdr *hdr = | |
2566 | (struct ieee80211_hdr *) skb->data; | |
2567 | /* more buffered multicast/broadcast frames ==> set | |
2568 | * MoreData flag in IEEE 802.11 header to inform PS | |
2569 | * STAs */ | |
2570 | hdr->frame_control |= | |
2571 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
2572 | } | |
2573 | ||
3b8d81e0 | 2574 | if (!ieee80211_tx_prepare(sdata, &tx, skb)) |
e2ebc74d JB |
2575 | break; |
2576 | dev_kfree_skb_any(skb); | |
2577 | } | |
e039fa4a JB |
2578 | |
2579 | info = IEEE80211_SKB_CB(skb); | |
2580 | ||
e2ebc74d | 2581 | sta = tx.sta; |
5cf121c3 JB |
2582 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
2583 | tx.channel = local->hw.conf.channel; | |
e039fa4a | 2584 | info->band = tx.channel->band; |
e2ebc74d | 2585 | |
97b045d6 | 2586 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 2587 | skb = NULL; |
97b045d6 | 2588 | out: |
d0709a65 | 2589 | rcu_read_unlock(); |
e2ebc74d JB |
2590 | |
2591 | return skb; | |
2592 | } | |
2593 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 2594 | |
62ae67be | 2595 | void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
3b8d81e0 | 2596 | { |
3b8d81e0 JB |
2597 | skb_set_mac_header(skb, 0); |
2598 | skb_set_network_header(skb, 0); | |
2599 | skb_set_transport_header(skb, 0); | |
2600 | ||
cf0277e7 JB |
2601 | /* send all internal mgmt frames on VO */ |
2602 | skb_set_queue_mapping(skb, 0); | |
2603 | ||
3d34deb6 JB |
2604 | /* |
2605 | * The other path calling ieee80211_xmit is from the tasklet, | |
2606 | * and while we can handle concurrent transmissions locking | |
2607 | * requirements are that we do not come into tx with bhs on. | |
2608 | */ | |
2609 | local_bh_disable(); | |
3b8d81e0 | 2610 | ieee80211_xmit(sdata, skb); |
3d34deb6 | 2611 | local_bh_enable(); |
3b8d81e0 | 2612 | } |