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 | 35 | |
e2ebc74d JB |
36 | /* misc utils */ |
37 | ||
03f93c3d JB |
38 | static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, int group_addr, |
39 | int next_frag_len) | |
e2ebc74d JB |
40 | { |
41 | int rate, mrate, erp, dur, i; | |
2e92e6f2 | 42 | struct ieee80211_rate *txrate; |
e2ebc74d | 43 | struct ieee80211_local *local = tx->local; |
8318d78a | 44 | struct ieee80211_supported_band *sband; |
358c8d9d | 45 | struct ieee80211_hdr *hdr; |
e6a9854b JB |
46 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
47 | ||
48 | /* assume HW handles this */ | |
49 | if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS) | |
50 | return 0; | |
51 | ||
52 | /* uh huh? */ | |
53 | if (WARN_ON_ONCE(info->control.rates[0].idx < 0)) | |
54 | return 0; | |
e2ebc74d | 55 | |
2e92e6f2 | 56 | sband = local->hw.wiphy->bands[tx->channel->band]; |
e6a9854b | 57 | txrate = &sband->bitrates[info->control.rates[0].idx]; |
8318d78a | 58 | |
e6a9854b | 59 | erp = txrate->flags & IEEE80211_RATE_ERP_G; |
e2ebc74d JB |
60 | |
61 | /* | |
62 | * data and mgmt (except PS Poll): | |
63 | * - during CFP: 32768 | |
64 | * - during contention period: | |
65 | * if addr1 is group address: 0 | |
66 | * if more fragments = 0 and addr1 is individual address: time to | |
67 | * transmit one ACK plus SIFS | |
68 | * if more fragments = 1 and addr1 is individual address: time to | |
69 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
70 | * | |
71 | * IEEE 802.11, 9.6: | |
72 | * - control response frame (CTS or ACK) shall be transmitted using the | |
73 | * same rate as the immediately previous frame in the frame exchange | |
74 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
75 | * at the highest possible rate belonging to the PHY rates in the | |
76 | * BSSBasicRateSet | |
77 | */ | |
358c8d9d HH |
78 | hdr = (struct ieee80211_hdr *)tx->skb->data; |
79 | if (ieee80211_is_ctl(hdr->frame_control)) { | |
e2ebc74d | 80 | /* TODO: These control frames are not currently sent by |
ccd7b362 | 81 | * mac80211, but should they be implemented, this function |
e2ebc74d JB |
82 | * needs to be updated to support duration field calculation. |
83 | * | |
84 | * RTS: time needed to transmit pending data/mgmt frame plus | |
85 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
86 | * CTS: duration of immediately previous RTS minus time | |
87 | * required to transmit CTS and its SIFS | |
88 | * ACK: 0 if immediately previous directed data/mgmt had | |
89 | * more=0, with more=1 duration in ACK frame is duration | |
90 | * from previous frame minus time needed to transmit ACK | |
91 | * and its SIFS | |
92 | * PS Poll: BIT(15) | BIT(14) | aid | |
93 | */ | |
94 | return 0; | |
95 | } | |
96 | ||
97 | /* data/mgmt */ | |
98 | if (0 /* FIX: data/mgmt during CFP */) | |
03f93c3d | 99 | return cpu_to_le16(32768); |
e2ebc74d JB |
100 | |
101 | if (group_addr) /* Group address as the destination - no ACK */ | |
102 | return 0; | |
103 | ||
104 | /* Individual destination address: | |
105 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
106 | * CTS and ACK frames shall be transmitted using the highest rate in | |
107 | * basic rate set that is less than or equal to the rate of the | |
108 | * immediately previous frame and that is using the same modulation | |
109 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
110 | * the highest mandatory rate of the PHY that is less than or equal to | |
111 | * the rate of the previous frame is used. | |
112 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
113 | */ | |
114 | rate = -1; | |
8318d78a JB |
115 | /* use lowest available if everything fails */ |
116 | mrate = sband->bitrates[0].bitrate; | |
117 | for (i = 0; i < sband->n_bitrates; i++) { | |
118 | struct ieee80211_rate *r = &sband->bitrates[i]; | |
e2ebc74d | 119 | |
8318d78a JB |
120 | if (r->bitrate > txrate->bitrate) |
121 | break; | |
e2ebc74d | 122 | |
bda3933a | 123 | if (tx->sdata->vif.bss_conf.basic_rates & BIT(i)) |
8318d78a JB |
124 | rate = r->bitrate; |
125 | ||
126 | switch (sband->band) { | |
127 | case IEEE80211_BAND_2GHZ: { | |
128 | u32 flag; | |
129 | if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
130 | flag = IEEE80211_RATE_MANDATORY_G; | |
131 | else | |
132 | flag = IEEE80211_RATE_MANDATORY_B; | |
133 | if (r->flags & flag) | |
134 | mrate = r->bitrate; | |
135 | break; | |
136 | } | |
137 | case IEEE80211_BAND_5GHZ: | |
138 | if (r->flags & IEEE80211_RATE_MANDATORY_A) | |
139 | mrate = r->bitrate; | |
140 | break; | |
141 | case IEEE80211_NUM_BANDS: | |
142 | WARN_ON(1); | |
143 | break; | |
144 | } | |
e2ebc74d JB |
145 | } |
146 | if (rate == -1) { | |
147 | /* No matching basic rate found; use highest suitable mandatory | |
148 | * PHY rate */ | |
149 | rate = mrate; | |
150 | } | |
151 | ||
152 | /* Time needed to transmit ACK | |
153 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
154 | * to closest integer */ | |
155 | ||
156 | dur = ieee80211_frame_duration(local, 10, rate, erp, | |
bda3933a | 157 | tx->sdata->vif.bss_conf.use_short_preamble); |
e2ebc74d JB |
158 | |
159 | if (next_frag_len) { | |
160 | /* Frame is fragmented: duration increases with time needed to | |
161 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
162 | dur *= 2; /* ACK + SIFS */ | |
163 | /* next fragment */ | |
164 | dur += ieee80211_frame_duration(local, next_frag_len, | |
8318d78a | 165 | txrate->bitrate, erp, |
bda3933a | 166 | tx->sdata->vif.bss_conf.use_short_preamble); |
e2ebc74d JB |
167 | } |
168 | ||
03f93c3d | 169 | return cpu_to_le16(dur); |
e2ebc74d JB |
170 | } |
171 | ||
42b16b3f | 172 | static inline int is_ieee80211_device(struct ieee80211_local *local, |
133b8226 | 173 | struct net_device *dev) |
e2ebc74d | 174 | { |
133b8226 | 175 | return local == wdev_priv(dev->ieee80211_ptr); |
e2ebc74d JB |
176 | } |
177 | ||
178 | /* tx handlers */ | |
5c1b98a5 KV |
179 | static ieee80211_tx_result debug_noinline |
180 | ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx) | |
181 | { | |
182 | struct ieee80211_local *local = tx->local; | |
0c74211d | 183 | struct ieee80211_if_managed *ifmgd; |
5c1b98a5 KV |
184 | |
185 | /* driver doesn't support power save */ | |
186 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) | |
187 | return TX_CONTINUE; | |
188 | ||
189 | /* hardware does dynamic power save */ | |
190 | if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) | |
191 | return TX_CONTINUE; | |
192 | ||
193 | /* dynamic power save disabled */ | |
194 | if (local->hw.conf.dynamic_ps_timeout <= 0) | |
195 | return TX_CONTINUE; | |
196 | ||
197 | /* we are scanning, don't enable power save */ | |
198 | if (local->scanning) | |
199 | return TX_CONTINUE; | |
200 | ||
201 | if (!local->ps_sdata) | |
202 | return TX_CONTINUE; | |
203 | ||
204 | /* No point if we're going to suspend */ | |
205 | if (local->quiescing) | |
206 | return TX_CONTINUE; | |
207 | ||
0c74211d KV |
208 | /* dynamic ps is supported only in managed mode */ |
209 | if (tx->sdata->vif.type != NL80211_IFTYPE_STATION) | |
210 | return TX_CONTINUE; | |
211 | ||
212 | ifmgd = &tx->sdata->u.mgd; | |
213 | ||
214 | /* | |
215 | * Don't wakeup from power save if u-apsd is enabled, voip ac has | |
216 | * u-apsd enabled and the frame is in voip class. This effectively | |
217 | * means that even if all access categories have u-apsd enabled, in | |
218 | * practise u-apsd is only used with the voip ac. This is a | |
219 | * workaround for the case when received voip class packets do not | |
220 | * have correct qos tag for some reason, due the network or the | |
221 | * peer application. | |
222 | * | |
223 | * Note: local->uapsd_queues access is racy here. If the value is | |
224 | * changed via debugfs, user needs to reassociate manually to have | |
225 | * everything in sync. | |
226 | */ | |
227 | if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) | |
228 | && (local->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) | |
229 | && skb_get_queue_mapping(tx->skb) == 0) | |
230 | return TX_CONTINUE; | |
231 | ||
5c1b98a5 KV |
232 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
233 | ieee80211_stop_queues_by_reason(&local->hw, | |
234 | IEEE80211_QUEUE_STOP_REASON_PS); | |
db28569a | 235 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
5c1b98a5 KV |
236 | ieee80211_queue_work(&local->hw, |
237 | &local->dynamic_ps_disable_work); | |
238 | } | |
239 | ||
5db1c07c LC |
240 | /* Don't restart the timer if we're not disassociated */ |
241 | if (!ifmgd->associated) | |
242 | return TX_CONTINUE; | |
243 | ||
5c1b98a5 KV |
244 | mod_timer(&local->dynamic_ps_timer, jiffies + |
245 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
246 | ||
247 | return TX_CONTINUE; | |
248 | } | |
e2ebc74d | 249 | |
d9e8a70f | 250 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 251 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 252 | { |
358c8d9d | 253 | |
e039fa4a | 254 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 255 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e2ebc74d JB |
256 | u32 sta_flags; |
257 | ||
e039fa4a | 258 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 259 | return TX_CONTINUE; |
58d4185e | 260 | |
b23b025f BG |
261 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
262 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && | |
a9a6ffff KV |
263 | !ieee80211_is_probe_req(hdr->frame_control) && |
264 | !ieee80211_is_nullfunc(hdr->frame_control)) | |
265 | /* | |
266 | * When software scanning only nullfunc frames (to notify | |
267 | * the sleep state to the AP) and probe requests (for the | |
268 | * active scan) are allowed, all other frames should not be | |
269 | * sent and we should not get here, but if we do | |
270 | * nonetheless, drop them to avoid sending them | |
271 | * off-channel. See the link below and | |
272 | * ieee80211_start_scan() for more. | |
273 | * | |
274 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
275 | */ | |
9ae54c84 | 276 | return TX_DROP; |
e2ebc74d | 277 | |
1be7fe8d BJ |
278 | if (tx->sdata->vif.type == NL80211_IFTYPE_WDS) |
279 | return TX_CONTINUE; | |
280 | ||
05c914fe | 281 | if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
33b64eb2 LCC |
282 | return TX_CONTINUE; |
283 | ||
5cf121c3 | 284 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 285 | return TX_CONTINUE; |
e2ebc74d | 286 | |
07346f81 | 287 | sta_flags = tx->sta ? get_sta_flags(tx->sta) : 0; |
e2ebc74d | 288 | |
5cf121c3 | 289 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
e2ebc74d | 290 | if (unlikely(!(sta_flags & WLAN_STA_ASSOC) && |
05c914fe | 291 | tx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
358c8d9d | 292 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d JB |
293 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
294 | printk(KERN_DEBUG "%s: dropped data frame to not " | |
0c68ae26 | 295 | "associated station %pM\n", |
47846c9b | 296 | tx->sdata->name, hdr->addr1); |
e2ebc74d JB |
297 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
298 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); | |
9ae54c84 | 299 | return TX_DROP; |
e2ebc74d JB |
300 | } |
301 | } else { | |
358c8d9d | 302 | if (unlikely(ieee80211_is_data(hdr->frame_control) && |
e2ebc74d | 303 | tx->local->num_sta == 0 && |
05c914fe | 304 | tx->sdata->vif.type != NL80211_IFTYPE_ADHOC)) { |
e2ebc74d JB |
305 | /* |
306 | * No associated STAs - no need to send multicast | |
307 | * frames. | |
308 | */ | |
9ae54c84 | 309 | return TX_DROP; |
e2ebc74d | 310 | } |
9ae54c84 | 311 | return TX_CONTINUE; |
e2ebc74d JB |
312 | } |
313 | ||
9ae54c84 | 314 | return TX_CONTINUE; |
e2ebc74d JB |
315 | } |
316 | ||
e2ebc74d JB |
317 | /* This function is called whenever the AP is about to exceed the maximum limit |
318 | * of buffered frames for power saving STAs. This situation should not really | |
319 | * happen often during normal operation, so dropping the oldest buffered packet | |
320 | * from each queue should be OK to make some room for new frames. */ | |
321 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
322 | { | |
323 | int total = 0, purged = 0; | |
324 | struct sk_buff *skb; | |
325 | struct ieee80211_sub_if_data *sdata; | |
326 | struct sta_info *sta; | |
327 | ||
79010420 JB |
328 | /* |
329 | * virtual interfaces are protected by RCU | |
330 | */ | |
331 | rcu_read_lock(); | |
332 | ||
333 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
e2ebc74d | 334 | struct ieee80211_if_ap *ap; |
05c914fe | 335 | if (sdata->vif.type != NL80211_IFTYPE_AP) |
e2ebc74d JB |
336 | continue; |
337 | ap = &sdata->u.ap; | |
338 | skb = skb_dequeue(&ap->ps_bc_buf); | |
339 | if (skb) { | |
340 | purged++; | |
341 | dev_kfree_skb(skb); | |
342 | } | |
343 | total += skb_queue_len(&ap->ps_bc_buf); | |
344 | } | |
e2ebc74d | 345 | |
d0709a65 | 346 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
e2ebc74d JB |
347 | skb = skb_dequeue(&sta->ps_tx_buf); |
348 | if (skb) { | |
349 | purged++; | |
350 | dev_kfree_skb(skb); | |
351 | } | |
352 | total += skb_queue_len(&sta->ps_tx_buf); | |
353 | } | |
d0709a65 JB |
354 | |
355 | rcu_read_unlock(); | |
e2ebc74d JB |
356 | |
357 | local->total_ps_buffered = total; | |
54223995 | 358 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0fb9a9ec JP |
359 | wiphy_debug(local->hw.wiphy, "PS buffers full - purged %d frames\n", |
360 | purged); | |
f4ea83dd | 361 | #endif |
e2ebc74d JB |
362 | } |
363 | ||
9ae54c84 | 364 | static ieee80211_tx_result |
5cf121c3 | 365 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 366 | { |
e039fa4a | 367 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 368 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 369 | |
7d54d0dd JB |
370 | /* |
371 | * broadcast/multicast frame | |
372 | * | |
373 | * If any of the associated stations is in power save mode, | |
374 | * the frame is buffered to be sent after DTIM beacon frame. | |
375 | * This is done either by the hardware or us. | |
376 | */ | |
377 | ||
3e122be0 JB |
378 | /* powersaving STAs only in AP/VLAN mode */ |
379 | if (!tx->sdata->bss) | |
380 | return TX_CONTINUE; | |
381 | ||
382 | /* no buffering for ordered frames */ | |
358c8d9d | 383 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 384 | return TX_CONTINUE; |
7d54d0dd JB |
385 | |
386 | /* no stations in PS mode */ | |
387 | if (!atomic_read(&tx->sdata->bss->num_sta_ps)) | |
9ae54c84 | 388 | return TX_CONTINUE; |
7d54d0dd | 389 | |
62b517cb | 390 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
62b1208e | 391 | |
62b517cb JB |
392 | /* device releases frame after DTIM beacon */ |
393 | if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)) | |
62b1208e | 394 | return TX_CONTINUE; |
62b1208e | 395 | |
7d54d0dd | 396 | /* buffered in mac80211 */ |
62b1208e JB |
397 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
398 | purge_old_ps_buffers(tx->local); | |
399 | ||
400 | if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >= AP_MAX_BC_BUFFER) { | |
54223995 | 401 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
62b1208e JB |
402 | if (net_ratelimit()) |
403 | printk(KERN_DEBUG "%s: BC TX buffer full - dropping the oldest frame\n", | |
47846c9b | 404 | tx->sdata->name); |
f4ea83dd | 405 | #endif |
62b1208e JB |
406 | dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf)); |
407 | } else | |
408 | tx->local->total_ps_buffered++; | |
e2ebc74d | 409 | |
62b1208e | 410 | skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb); |
7d54d0dd | 411 | |
62b1208e | 412 | return TX_QUEUED; |
e2ebc74d JB |
413 | } |
414 | ||
fb733336 JM |
415 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
416 | struct sk_buff *skb) | |
417 | { | |
418 | if (!ieee80211_is_mgmt(fc)) | |
419 | return 0; | |
420 | ||
421 | if (sta == NULL || !test_sta_flags(sta, WLAN_STA_MFP)) | |
422 | return 0; | |
423 | ||
424 | if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) | |
425 | skb->data)) | |
426 | return 0; | |
427 | ||
428 | return 1; | |
429 | } | |
430 | ||
9ae54c84 | 431 | static ieee80211_tx_result |
5cf121c3 | 432 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
433 | { |
434 | struct sta_info *sta = tx->sta; | |
e039fa4a | 435 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 436 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
3393a608 | 437 | struct ieee80211_local *local = tx->local; |
07346f81 | 438 | u32 staflags; |
e2ebc74d | 439 | |
f64f9e71 JP |
440 | if (unlikely(!sta || |
441 | ieee80211_is_probe_resp(hdr->frame_control) || | |
442 | ieee80211_is_auth(hdr->frame_control) || | |
443 | ieee80211_is_assoc_resp(hdr->frame_control) || | |
444 | ieee80211_is_reassoc_resp(hdr->frame_control))) | |
9ae54c84 | 445 | return TX_CONTINUE; |
e2ebc74d | 446 | |
07346f81 JB |
447 | staflags = get_sta_flags(sta); |
448 | ||
af818581 | 449 | if (unlikely((staflags & (WLAN_STA_PS_STA | WLAN_STA_PS_DRIVER)) && |
3fa52056 | 450 | !(info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE))) { |
e2ebc74d | 451 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0c68ae26 | 452 | printk(KERN_DEBUG "STA %pM aid %d: PS buffer (entries " |
e2ebc74d | 453 | "before %d)\n", |
0c68ae26 | 454 | sta->sta.addr, sta->sta.aid, |
e2ebc74d JB |
455 | skb_queue_len(&sta->ps_tx_buf)); |
456 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
e2ebc74d JB |
457 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
458 | purge_old_ps_buffers(tx->local); | |
459 | if (skb_queue_len(&sta->ps_tx_buf) >= STA_MAX_TX_BUFFER) { | |
460 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf); | |
54223995 | 461 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
e2ebc74d | 462 | if (net_ratelimit()) { |
0c68ae26 | 463 | printk(KERN_DEBUG "%s: STA %pM TX " |
e2ebc74d | 464 | "buffer full - dropping oldest frame\n", |
47846c9b | 465 | tx->sdata->name, sta->sta.addr); |
e2ebc74d | 466 | } |
f4ea83dd | 467 | #endif |
e2ebc74d JB |
468 | dev_kfree_skb(old); |
469 | } else | |
470 | tx->local->total_ps_buffered++; | |
004c872e | 471 | |
af818581 JB |
472 | /* |
473 | * Queue frame to be sent after STA wakes up/polls, | |
474 | * but don't set the TIM bit if the driver is blocking | |
475 | * wakeup or poll response transmissions anyway. | |
476 | */ | |
477 | if (skb_queue_empty(&sta->ps_tx_buf) && | |
478 | !(staflags & WLAN_STA_PS_DRIVER)) | |
004c872e JB |
479 | sta_info_set_tim_bit(sta); |
480 | ||
e039fa4a | 481 | info->control.jiffies = jiffies; |
5061b0c2 | 482 | info->control.vif = &tx->sdata->vif; |
8f77f384 | 483 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
e2ebc74d | 484 | skb_queue_tail(&sta->ps_tx_buf, tx->skb); |
3393a608 JO |
485 | |
486 | if (!timer_pending(&local->sta_cleanup)) | |
487 | mod_timer(&local->sta_cleanup, | |
488 | round_jiffies(jiffies + | |
489 | STA_INFO_CLEANUP_INTERVAL)); | |
490 | ||
9ae54c84 | 491 | return TX_QUEUED; |
e2ebc74d JB |
492 | } |
493 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
af818581 | 494 | else if (unlikely(staflags & WLAN_STA_PS_STA)) { |
0c68ae26 | 495 | printk(KERN_DEBUG "%s: STA %pM in PS mode, but pspoll " |
47846c9b | 496 | "set -> send frame\n", tx->sdata->name, |
0c68ae26 | 497 | sta->sta.addr); |
e2ebc74d JB |
498 | } |
499 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
e2ebc74d | 500 | |
9ae54c84 | 501 | return TX_CONTINUE; |
e2ebc74d JB |
502 | } |
503 | ||
d9e8a70f | 504 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 505 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 506 | { |
5cf121c3 | 507 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 508 | return TX_CONTINUE; |
e2ebc74d | 509 | |
5cf121c3 | 510 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
511 | return ieee80211_tx_h_unicast_ps_buf(tx); |
512 | else | |
513 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
514 | } | |
515 | ||
a621fa4d JB |
516 | static ieee80211_tx_result debug_noinline |
517 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
518 | { | |
519 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
520 | ||
521 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol && | |
522 | tx->sdata->control_port_no_encrypt)) | |
523 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
524 | ||
525 | return TX_CONTINUE; | |
526 | } | |
527 | ||
d9e8a70f | 528 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 529 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 530 | { |
d3feaf5a | 531 | struct ieee80211_key *key = NULL; |
e039fa4a | 532 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 533 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 534 | |
3b8d81e0 | 535 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 536 | tx->key = NULL; |
e31b8213 | 537 | else if (tx->sta && (key = rcu_dereference(tx->sta->ptk))) |
d4e46a3d | 538 | tx->key = key; |
3cfcf6ac | 539 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 JM |
540 | is_multicast_ether_addr(hdr->addr1) && |
541 | ieee80211_is_robust_mgmt_frame(hdr) && | |
3cfcf6ac JM |
542 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
543 | tx->key = key; | |
f7e0104c JB |
544 | else if (is_multicast_ether_addr(hdr->addr1) && |
545 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
546 | tx->key = key; | |
547 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
548 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 549 | tx->key = key; |
e2ebc74d | 550 | else if (tx->sdata->drop_unencrypted && |
a621fa4d | 551 | (tx->skb->protocol != tx->sdata->control_port_protocol) && |
e0463f50 JM |
552 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && |
553 | (!ieee80211_is_robust_mgmt_frame(hdr) || | |
554 | (ieee80211_is_action(hdr->frame_control) && | |
555 | tx->sta && test_sta_flags(tx->sta, WLAN_STA_MFP)))) { | |
e2ebc74d | 556 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); |
9ae54c84 | 557 | return TX_DROP; |
176e4f84 | 558 | } else |
e2ebc74d JB |
559 | tx->key = NULL; |
560 | ||
561 | if (tx->key) { | |
813d7669 JB |
562 | bool skip_hw = false; |
563 | ||
e2ebc74d | 564 | tx->key->tx_rx_count++; |
011bfcc4 | 565 | /* TODO: add threshold stuff again */ |
176e4f84 | 566 | |
97359d12 JB |
567 | switch (tx->key->conf.cipher) { |
568 | case WLAN_CIPHER_SUITE_WEP40: | |
569 | case WLAN_CIPHER_SUITE_WEP104: | |
358c8d9d | 570 | if (ieee80211_is_auth(hdr->frame_control)) |
176e4f84 | 571 | break; |
97359d12 | 572 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 573 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
574 | tx->key = NULL; |
575 | break; | |
97359d12 | 576 | case WLAN_CIPHER_SUITE_CCMP: |
fb733336 JM |
577 | if (!ieee80211_is_data_present(hdr->frame_control) && |
578 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
579 | tx->skb)) | |
580 | tx->key = NULL; | |
3b43a187 KV |
581 | else |
582 | skip_hw = (tx->key->conf.flags & | |
583 | IEEE80211_KEY_FLAG_SW_MGMT) && | |
584 | ieee80211_is_mgmt(hdr->frame_control); | |
fb733336 | 585 | break; |
97359d12 | 586 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac JM |
587 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
588 | tx->key = NULL; | |
589 | break; | |
176e4f84 | 590 | } |
813d7669 | 591 | |
f12553eb | 592 | if (!skip_hw && tx->key && |
382b1655 | 593 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 594 | info->control.hw_key = &tx->key->conf; |
e2ebc74d JB |
595 | } |
596 | ||
9ae54c84 | 597 | return TX_CONTINUE; |
e2ebc74d JB |
598 | } |
599 | ||
d9e8a70f | 600 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 601 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 602 | { |
e039fa4a | 603 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
604 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
605 | struct ieee80211_supported_band *sband; | |
606 | struct ieee80211_rate *rate; | |
a2c40249 SZ |
607 | int i; |
608 | u32 len; | |
e6a9854b JB |
609 | bool inval = false, rts = false, short_preamble = false; |
610 | struct ieee80211_tx_rate_control txrc; | |
b770b43e | 611 | u32 sta_flags; |
8318d78a | 612 | |
e6a9854b | 613 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 614 | |
e6a9854b | 615 | sband = tx->local->hw.wiphy->bands[tx->channel->band]; |
58d4185e | 616 | |
a2c40249 | 617 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 618 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
619 | |
620 | /* set up the tx rate control struct we give the RC algo */ | |
621 | txrc.hw = local_to_hw(tx->local); | |
622 | txrc.sband = sband; | |
623 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
624 | txrc.skb = tx->skb; | |
625 | txrc.reported_rate.idx = -1; | |
37eb0b16 JM |
626 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[tx->channel->band]; |
627 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) | |
628 | txrc.max_rate_idx = -1; | |
629 | else | |
630 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
8f0729b1 FF |
631 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
632 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC); | |
e6a9854b JB |
633 | |
634 | /* set up RTS protection if desired */ | |
b9a5f8ca | 635 | if (len > tx->local->hw.wiphy->rts_threshold) { |
e6a9854b | 636 | txrc.rts = rts = true; |
e2ebc74d | 637 | } |
e2ebc74d | 638 | |
e6a9854b JB |
639 | /* |
640 | * Use short preamble if the BSS can handle it, but not for | |
641 | * management frames unless we know the receiver can handle | |
642 | * that -- the management frame might be to a station that | |
643 | * just wants a probe response. | |
644 | */ | |
645 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
646 | (ieee80211_is_data(hdr->frame_control) || | |
647 | (tx->sta && test_sta_flags(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) | |
648 | txrc.short_preamble = short_preamble = true; | |
e2ebc74d | 649 | |
b770b43e LR |
650 | sta_flags = tx->sta ? get_sta_flags(tx->sta) : 0; |
651 | ||
652 | /* | |
653 | * Lets not bother rate control if we're associated and cannot | |
654 | * talk to the sta. This should not happen. | |
655 | */ | |
fbe9c429 | 656 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && |
b770b43e LR |
657 | (sta_flags & WLAN_STA_ASSOC) && |
658 | !rate_usable_index_exists(sband, &tx->sta->sta), | |
659 | "%s: Dropped data frame as no usable bitrate found while " | |
660 | "scanning and associated. Target station: " | |
661 | "%pM on %d GHz band\n", | |
47846c9b | 662 | tx->sdata->name, hdr->addr1, |
b770b43e LR |
663 | tx->channel->band ? 5 : 2)) |
664 | return TX_DROP; | |
2e92e6f2 | 665 | |
b770b43e LR |
666 | /* |
667 | * If we're associated with the sta at this point we know we can at | |
668 | * least send the frame at the lowest bit rate. | |
669 | */ | |
e6a9854b JB |
670 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
671 | ||
672 | if (unlikely(info->control.rates[0].idx < 0)) | |
673 | return TX_DROP; | |
674 | ||
c1ce5a74 | 675 | if (txrc.reported_rate.idx < 0) { |
e6a9854b | 676 | txrc.reported_rate = info->control.rates[0]; |
c1ce5a74 HS |
677 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
678 | tx->sta->last_tx_rate = txrc.reported_rate; | |
679 | } else if (tx->sta) | |
e6a9854b | 680 | tx->sta->last_tx_rate = txrc.reported_rate; |
e039fa4a | 681 | |
e6a9854b JB |
682 | if (unlikely(!info->control.rates[0].count)) |
683 | info->control.rates[0].count = 1; | |
e2ebc74d | 684 | |
9955151d GS |
685 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
686 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
687 | info->control.rates[0].count = 1; | |
688 | ||
e6a9854b JB |
689 | if (is_multicast_ether_addr(hdr->addr1)) { |
690 | /* | |
691 | * XXX: verify the rate is in the basic rateset | |
692 | */ | |
693 | return TX_CONTINUE; | |
e2ebc74d JB |
694 | } |
695 | ||
e6a9854b JB |
696 | /* |
697 | * set up the RTS/CTS rate as the fastest basic rate | |
698 | * that is not faster than the data rate | |
699 | * | |
700 | * XXX: Should this check all retry rates? | |
701 | */ | |
702 | if (!(info->control.rates[0].flags & IEEE80211_TX_RC_MCS)) { | |
703 | s8 baserate = 0; | |
704 | ||
705 | rate = &sband->bitrates[info->control.rates[0].idx]; | |
706 | ||
707 | for (i = 0; i < sband->n_bitrates; i++) { | |
708 | /* must be a basic rate */ | |
709 | if (!(tx->sdata->vif.bss_conf.basic_rates & BIT(i))) | |
710 | continue; | |
711 | /* must not be faster than the data rate */ | |
712 | if (sband->bitrates[i].bitrate > rate->bitrate) | |
713 | continue; | |
714 | /* maximum */ | |
715 | if (sband->bitrates[baserate].bitrate < | |
716 | sband->bitrates[i].bitrate) | |
717 | baserate = i; | |
718 | } | |
719 | ||
720 | info->control.rts_cts_rate_idx = baserate; | |
7e9ed188 DD |
721 | } |
722 | ||
e6a9854b JB |
723 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
724 | /* | |
725 | * make sure there's no valid rate following | |
726 | * an invalid one, just in case drivers don't | |
727 | * take the API seriously to stop at -1. | |
728 | */ | |
729 | if (inval) { | |
730 | info->control.rates[i].idx = -1; | |
731 | continue; | |
732 | } | |
733 | if (info->control.rates[i].idx < 0) { | |
734 | inval = true; | |
735 | continue; | |
736 | } | |
8318d78a | 737 | |
e6a9854b JB |
738 | /* |
739 | * For now assume MCS is already set up correctly, this | |
740 | * needs to be fixed. | |
741 | */ | |
742 | if (info->control.rates[i].flags & IEEE80211_TX_RC_MCS) { | |
743 | WARN_ON(info->control.rates[i].idx > 76); | |
744 | continue; | |
745 | } | |
e2ebc74d | 746 | |
e6a9854b JB |
747 | /* set up RTS protection if desired */ |
748 | if (rts) | |
749 | info->control.rates[i].flags |= | |
750 | IEEE80211_TX_RC_USE_RTS_CTS; | |
8318d78a | 751 | |
e6a9854b | 752 | /* RC is busted */ |
075cbc9e S |
753 | if (WARN_ON_ONCE(info->control.rates[i].idx >= |
754 | sband->n_bitrates)) { | |
e6a9854b JB |
755 | info->control.rates[i].idx = -1; |
756 | continue; | |
8318d78a | 757 | } |
e2ebc74d | 758 | |
e6a9854b JB |
759 | rate = &sband->bitrates[info->control.rates[i].idx]; |
760 | ||
761 | /* set up short preamble */ | |
762 | if (short_preamble && | |
763 | rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) | |
764 | info->control.rates[i].flags |= | |
765 | IEEE80211_TX_RC_USE_SHORT_PREAMBLE; | |
766 | ||
767 | /* set up G protection */ | |
768 | if (!rts && tx->sdata->vif.bss_conf.use_cts_prot && | |
769 | rate->flags & IEEE80211_RATE_ERP_G) | |
770 | info->control.rates[i].flags |= | |
771 | IEEE80211_TX_RC_USE_CTS_PROTECT; | |
e2ebc74d JB |
772 | } |
773 | ||
e6a9854b JB |
774 | return TX_CONTINUE; |
775 | } | |
776 | ||
f591fa5d JB |
777 | static ieee80211_tx_result debug_noinline |
778 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
779 | { | |
780 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
781 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
782 | u16 *seq; | |
783 | u8 *qc; | |
784 | int tid; | |
785 | ||
25d834e1 JB |
786 | /* |
787 | * Packet injection may want to control the sequence | |
788 | * number, if we have no matching interface then we | |
789 | * neither assign one ourselves nor ask the driver to. | |
790 | */ | |
5061b0c2 | 791 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
792 | return TX_CONTINUE; |
793 | ||
f591fa5d JB |
794 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
795 | return TX_CONTINUE; | |
796 | ||
797 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
798 | return TX_CONTINUE; | |
799 | ||
94778280 JB |
800 | /* |
801 | * Anything but QoS data that has a sequence number field | |
802 | * (is long enough) gets a sequence number from the global | |
803 | * counter. | |
804 | */ | |
f591fa5d | 805 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
94778280 | 806 | /* driver should assign sequence number */ |
f591fa5d | 807 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
808 | /* for pure STA mode without beacons, we can do it */ |
809 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
810 | tx->sdata->sequence_number += 0x10; | |
f591fa5d JB |
811 | return TX_CONTINUE; |
812 | } | |
813 | ||
814 | /* | |
815 | * This should be true for injected/management frames only, for | |
816 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
817 | * above since they are not QoS-data frames. | |
818 | */ | |
819 | if (!tx->sta) | |
820 | return TX_CONTINUE; | |
821 | ||
822 | /* include per-STA, per-TID sequence counter */ | |
823 | ||
824 | qc = ieee80211_get_qos_ctl(hdr); | |
825 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
826 | seq = &tx->sta->tid_seq[tid]; | |
827 | ||
828 | hdr->seq_ctrl = cpu_to_le16(*seq); | |
829 | ||
830 | /* Increase the sequence number. */ | |
831 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
832 | ||
833 | return TX_CONTINUE; | |
834 | } | |
835 | ||
2de8e0d9 JB |
836 | static int ieee80211_fragment(struct ieee80211_local *local, |
837 | struct sk_buff *skb, int hdrlen, | |
838 | int frag_threshold) | |
839 | { | |
840 | struct sk_buff *tail = skb, *tmp; | |
841 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; | |
842 | int pos = hdrlen + per_fragm; | |
843 | int rem = skb->len - hdrlen - per_fragm; | |
844 | ||
845 | if (WARN_ON(rem < 0)) | |
846 | return -EINVAL; | |
847 | ||
848 | while (rem) { | |
849 | int fraglen = per_fragm; | |
850 | ||
851 | if (fraglen > rem) | |
852 | fraglen = rem; | |
853 | rem -= fraglen; | |
854 | tmp = dev_alloc_skb(local->tx_headroom + | |
855 | frag_threshold + | |
856 | IEEE80211_ENCRYPT_HEADROOM + | |
857 | IEEE80211_ENCRYPT_TAILROOM); | |
858 | if (!tmp) | |
859 | return -ENOMEM; | |
860 | tail->next = tmp; | |
861 | tail = tmp; | |
862 | skb_reserve(tmp, local->tx_headroom + | |
863 | IEEE80211_ENCRYPT_HEADROOM); | |
864 | /* copy control information */ | |
865 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
866 | skb_copy_queue_mapping(tmp, skb); | |
867 | tmp->priority = skb->priority; | |
2de8e0d9 | 868 | tmp->dev = skb->dev; |
2de8e0d9 JB |
869 | |
870 | /* copy header and data */ | |
871 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
872 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
873 | ||
874 | pos += fraglen; | |
875 | } | |
876 | ||
877 | skb->len = hdrlen + per_fragm; | |
878 | return 0; | |
879 | } | |
880 | ||
d9e8a70f | 881 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
882 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
883 | { | |
2de8e0d9 JB |
884 | struct sk_buff *skb = tx->skb; |
885 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
886 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 887 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
888 | int hdrlen; |
889 | int fragnum; | |
e2454948 JB |
890 | |
891 | if (!(tx->flags & IEEE80211_TX_FRAGMENTED)) | |
892 | return TX_CONTINUE; | |
893 | ||
eefce91a JB |
894 | /* |
895 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 896 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 897 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 898 | */ |
8b30b1fe | 899 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
900 | return TX_DROP; |
901 | ||
065e9605 | 902 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 903 | |
2de8e0d9 | 904 | /* internal error, why is TX_FRAGMENTED set? */ |
8ccd8f21 | 905 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 906 | return TX_DROP; |
e6a9854b | 907 | |
2de8e0d9 JB |
908 | /* |
909 | * Now fragment the frame. This will allocate all the fragments and | |
910 | * chain them (using skb as the first fragment) to skb->next. | |
911 | * During transmission, we will remove the successfully transmitted | |
912 | * fragments from this list. When the low-level driver rejects one | |
913 | * of the fragments then we will simply pretend to accept the skb | |
914 | * but store it away as pending. | |
915 | */ | |
916 | if (ieee80211_fragment(tx->local, skb, hdrlen, frag_threshold)) | |
917 | return TX_DROP; | |
e6a9854b | 918 | |
2de8e0d9 JB |
919 | /* update duration/seq/flags of fragments */ |
920 | fragnum = 0; | |
921 | do { | |
922 | int next_len; | |
923 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); | |
e6a9854b | 924 | |
2de8e0d9 JB |
925 | hdr = (void *)skb->data; |
926 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 927 | |
2de8e0d9 JB |
928 | if (skb->next) { |
929 | hdr->frame_control |= morefrags; | |
930 | next_len = skb->next->len; | |
e6a9854b JB |
931 | /* |
932 | * No multi-rate retries for fragmented frames, that | |
933 | * would completely throw off the NAV at other STAs. | |
934 | */ | |
935 | info->control.rates[1].idx = -1; | |
936 | info->control.rates[2].idx = -1; | |
937 | info->control.rates[3].idx = -1; | |
938 | info->control.rates[4].idx = -1; | |
939 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 5); | |
940 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; | |
2de8e0d9 JB |
941 | } else { |
942 | hdr->frame_control &= ~morefrags; | |
943 | next_len = 0; | |
e6a9854b | 944 | } |
2de8e0d9 JB |
945 | hdr->duration_id = ieee80211_duration(tx, 0, next_len); |
946 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); | |
947 | fragnum++; | |
948 | } while ((skb = skb->next)); | |
e2ebc74d | 949 | |
9ae54c84 | 950 | return TX_CONTINUE; |
e2ebc74d JB |
951 | } |
952 | ||
feff1f2f JB |
953 | static ieee80211_tx_result debug_noinline |
954 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
955 | { | |
956 | struct sk_buff *skb = tx->skb; | |
957 | ||
958 | if (!tx->sta) | |
959 | return TX_CONTINUE; | |
960 | ||
961 | tx->sta->tx_packets++; | |
962 | do { | |
963 | tx->sta->tx_fragments++; | |
964 | tx->sta->tx_bytes += skb->len; | |
965 | } while ((skb = skb->next)); | |
966 | ||
967 | return TX_CONTINUE; | |
968 | } | |
969 | ||
d9e8a70f | 970 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
971 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
972 | { | |
3ffc2a90 JB |
973 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
974 | ||
e2454948 JB |
975 | if (!tx->key) |
976 | return TX_CONTINUE; | |
977 | ||
97359d12 JB |
978 | switch (tx->key->conf.cipher) { |
979 | case WLAN_CIPHER_SUITE_WEP40: | |
980 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 981 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 982 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 983 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 984 | case WLAN_CIPHER_SUITE_CCMP: |
e2454948 | 985 | return ieee80211_crypto_ccmp_encrypt(tx); |
97359d12 | 986 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 987 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
3ffc2a90 JB |
988 | default: |
989 | /* handle hw-only algorithm */ | |
990 | if (info->control.hw_key) { | |
991 | ieee80211_tx_set_protected(tx); | |
992 | return TX_CONTINUE; | |
993 | } | |
994 | break; | |
995 | ||
e2454948 JB |
996 | } |
997 | ||
e2454948 JB |
998 | return TX_DROP; |
999 | } | |
1000 | ||
d9e8a70f | 1001 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1002 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1003 | { | |
2de8e0d9 JB |
1004 | struct sk_buff *skb = tx->skb; |
1005 | struct ieee80211_hdr *hdr; | |
1006 | int next_len; | |
1007 | bool group_addr; | |
03f93c3d | 1008 | |
2de8e0d9 JB |
1009 | do { |
1010 | hdr = (void *) skb->data; | |
7e0aae47 JM |
1011 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1012 | break; /* must not overwrite AID */ | |
2de8e0d9 JB |
1013 | next_len = skb->next ? skb->next->len : 0; |
1014 | group_addr = is_multicast_ether_addr(hdr->addr1); | |
03f93c3d | 1015 | |
2de8e0d9 JB |
1016 | hdr->duration_id = |
1017 | ieee80211_duration(tx, group_addr, next_len); | |
1018 | } while ((skb = skb->next)); | |
03f93c3d JB |
1019 | |
1020 | return TX_CONTINUE; | |
1021 | } | |
1022 | ||
e2ebc74d JB |
1023 | /* actual transmit path */ |
1024 | ||
1025 | /* | |
1026 | * deal with packet injection down monitor interface | |
1027 | * with Radiotap Header -- only called for monitor mode interface | |
1028 | */ | |
27004b10 JB |
1029 | static bool __ieee80211_parse_tx_radiotap(struct ieee80211_tx_data *tx, |
1030 | struct sk_buff *skb) | |
e2ebc74d JB |
1031 | { |
1032 | /* | |
1033 | * this is the moment to interpret and discard the radiotap header that | |
1034 | * must be at the start of the packet injected in Monitor mode | |
1035 | * | |
1036 | * Need to take some care with endian-ness since radiotap | |
1037 | * args are little-endian | |
1038 | */ | |
1039 | ||
1040 | struct ieee80211_radiotap_iterator iterator; | |
1041 | struct ieee80211_radiotap_header *rthdr = | |
1042 | (struct ieee80211_radiotap_header *) skb->data; | |
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 | |
3b8d81e0 | 1048 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
5cf121c3 | 1049 | tx->flags &= ~IEEE80211_TX_FRAGMENTED; |
e2ebc74d | 1050 | |
f23a4780 AN |
1051 | /* packet is fragmented in HW if we have a non-NULL driver callback */ |
1052 | hw_frag = (tx->local->ops->set_frag_threshold != NULL); | |
1053 | ||
e2ebc74d JB |
1054 | /* |
1055 | * for every radiotap entry that is present | |
1056 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1057 | * entries present, or -EINVAL on error) | |
1058 | */ | |
1059 | ||
1060 | while (!ret) { | |
e2ebc74d JB |
1061 | ret = ieee80211_radiotap_iterator_next(&iterator); |
1062 | ||
1063 | if (ret) | |
1064 | continue; | |
1065 | ||
1066 | /* see if this argument is something we can use */ | |
1067 | switch (iterator.this_arg_index) { | |
1068 | /* | |
1069 | * You must take care when dereferencing iterator.this_arg | |
1070 | * for multibyte types... the pointer is not aligned. Use | |
1071 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1072 | * iterator.this_arg for type "type" safely on all arches. | |
1073 | */ | |
e2ebc74d JB |
1074 | case IEEE80211_RADIOTAP_FLAGS: |
1075 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1076 | /* | |
1077 | * this indicates that the skb we have been | |
1078 | * handed has the 32-bit FCS CRC at the end... | |
1079 | * we should react to that by snipping it off | |
1080 | * because it will be recomputed and added | |
1081 | * on transmission | |
1082 | */ | |
33e5a2f7 | 1083 | if (skb->len < (iterator._max_length + FCS_LEN)) |
27004b10 | 1084 | return false; |
e2ebc74d JB |
1085 | |
1086 | skb_trim(skb, skb->len - FCS_LEN); | |
1087 | } | |
58d4185e | 1088 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) |
3b8d81e0 | 1089 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; |
f23a4780 AN |
1090 | if ((*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) && |
1091 | !hw_frag) | |
5cf121c3 | 1092 | tx->flags |= IEEE80211_TX_FRAGMENTED; |
e2ebc74d JB |
1093 | break; |
1094 | ||
58d4185e JB |
1095 | /* |
1096 | * Please update the file | |
1097 | * Documentation/networking/mac80211-injection.txt | |
1098 | * when parsing new fields here. | |
1099 | */ | |
1100 | ||
e2ebc74d JB |
1101 | default: |
1102 | break; | |
1103 | } | |
1104 | } | |
1105 | ||
1106 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
27004b10 | 1107 | return false; |
e2ebc74d JB |
1108 | |
1109 | /* | |
1110 | * remove the radiotap header | |
33e5a2f7 | 1111 | * iterator->_max_length was sanity-checked against |
e2ebc74d JB |
1112 | * skb->len by iterator init |
1113 | */ | |
33e5a2f7 | 1114 | skb_pull(skb, iterator._max_length); |
e2ebc74d | 1115 | |
27004b10 | 1116 | return true; |
e2ebc74d JB |
1117 | } |
1118 | ||
a622ab72 JB |
1119 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1120 | struct sk_buff *skb, | |
1121 | struct ieee80211_tx_info *info, | |
1122 | struct tid_ampdu_tx *tid_tx, | |
1123 | int tid) | |
1124 | { | |
1125 | bool queued = false; | |
1126 | ||
1127 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1128 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
0ab33703 JB |
1129 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1130 | /* | |
1131 | * nothing -- this aggregation session is being started | |
1132 | * but that might still fail with the driver | |
1133 | */ | |
a622ab72 JB |
1134 | } else { |
1135 | spin_lock(&tx->sta->lock); | |
1136 | /* | |
1137 | * Need to re-check now, because we may get here | |
1138 | * | |
1139 | * 1) in the window during which the setup is actually | |
1140 | * already done, but not marked yet because not all | |
1141 | * packets are spliced over to the driver pending | |
1142 | * queue yet -- if this happened we acquire the lock | |
1143 | * either before or after the splice happens, but | |
1144 | * need to recheck which of these cases happened. | |
1145 | * | |
1146 | * 2) during session teardown, if the OPERATIONAL bit | |
1147 | * was cleared due to the teardown but the pointer | |
1148 | * hasn't been assigned NULL yet (or we loaded it | |
1149 | * before it was assigned) -- in this case it may | |
1150 | * now be NULL which means we should just let the | |
1151 | * packet pass through because splicing the frames | |
1152 | * back is already done. | |
1153 | */ | |
40b275b6 | 1154 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1155 | |
1156 | if (!tid_tx) { | |
1157 | /* do nothing, let packet pass through */ | |
1158 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1159 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
1160 | } else { | |
1161 | queued = true; | |
1162 | info->control.vif = &tx->sdata->vif; | |
1163 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1164 | __skb_queue_tail(&tid_tx->pending, skb); | |
1165 | } | |
1166 | spin_unlock(&tx->sta->lock); | |
1167 | } | |
1168 | ||
1169 | return queued; | |
1170 | } | |
1171 | ||
58d4185e JB |
1172 | /* |
1173 | * initialises @tx | |
1174 | */ | |
9ae54c84 | 1175 | static ieee80211_tx_result |
3b8d81e0 JB |
1176 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1177 | struct ieee80211_tx_data *tx, | |
1178 | struct sk_buff *skb) | |
e2ebc74d | 1179 | { |
3b8d81e0 | 1180 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1181 | struct ieee80211_hdr *hdr; |
e039fa4a | 1182 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
8b30b1fe | 1183 | int hdrlen, tid; |
a622ab72 | 1184 | u8 *qc; |
e2ebc74d JB |
1185 | |
1186 | memset(tx, 0, sizeof(*tx)); | |
1187 | tx->skb = skb; | |
e2ebc74d | 1188 | tx->local = local; |
3b8d81e0 | 1189 | tx->sdata = sdata; |
e039fa4a | 1190 | tx->channel = local->hw.conf.channel; |
e2ebc74d | 1191 | /* |
58d4185e JB |
1192 | * Set this flag (used below to indicate "automatic fragmentation"), |
1193 | * it will be cleared/left by radiotap as desired. | |
f23a4780 | 1194 | * Only valid when fragmentation is done by the stack. |
e2ebc74d | 1195 | */ |
f23a4780 AN |
1196 | if (!local->ops->set_frag_threshold) |
1197 | tx->flags |= IEEE80211_TX_FRAGMENTED; | |
e2ebc74d JB |
1198 | |
1199 | /* process and remove the injection radiotap header */ | |
17ad353b | 1200 | if (unlikely(info->flags & IEEE80211_TX_INTFL_HAS_RADIOTAP)) { |
27004b10 | 1201 | if (!__ieee80211_parse_tx_radiotap(tx, skb)) |
9ae54c84 | 1202 | return TX_DROP; |
58d4185e | 1203 | |
e2ebc74d | 1204 | /* |
58d4185e JB |
1205 | * __ieee80211_parse_tx_radiotap has now removed |
1206 | * the radiotap header that was present and pre-filled | |
1207 | * 'tx' with tx control information. | |
e2ebc74d | 1208 | */ |
17ad353b | 1209 | info->flags &= ~IEEE80211_TX_INTFL_HAS_RADIOTAP; |
e2ebc74d JB |
1210 | } |
1211 | ||
cd8ffc80 JB |
1212 | /* |
1213 | * If this flag is set to true anywhere, and we get here, | |
1214 | * we are doing the needed processing, so remove the flag | |
1215 | * now. | |
1216 | */ | |
1217 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1218 | ||
58d4185e JB |
1219 | hdr = (struct ieee80211_hdr *) skb->data; |
1220 | ||
3f0e0b22 | 1221 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
f14543ee | 1222 | tx->sta = rcu_dereference(sdata->u.vlan.sta); |
3f0e0b22 FF |
1223 | if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr) |
1224 | return TX_DROP; | |
b4d57adb FF |
1225 | } else if (info->flags & IEEE80211_TX_CTL_INJECTED) { |
1226 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); | |
3f0e0b22 | 1227 | } |
f14543ee | 1228 | if (!tx->sta) |
abe60632 | 1229 | tx->sta = sta_info_get(sdata, hdr->addr1); |
58d4185e | 1230 | |
cd8ffc80 JB |
1231 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
1232 | (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)) { | |
cd8ffc80 JB |
1233 | struct tid_ampdu_tx *tid_tx; |
1234 | ||
8b30b1fe S |
1235 | qc = ieee80211_get_qos_ctl(hdr); |
1236 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
1237 | ||
a622ab72 JB |
1238 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1239 | if (tid_tx) { | |
1240 | bool queued; | |
cd8ffc80 | 1241 | |
a622ab72 JB |
1242 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1243 | tid_tx, tid); | |
1244 | ||
1245 | if (unlikely(queued)) | |
1246 | return TX_QUEUED; | |
1247 | } | |
8b30b1fe S |
1248 | } |
1249 | ||
badffb72 | 1250 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1251 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1252 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
badffb72 | 1253 | } else { |
5cf121c3 | 1254 | tx->flags |= IEEE80211_TX_UNICAST; |
d3707d99 JB |
1255 | if (unlikely(local->wifi_wme_noack_test)) |
1256 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1257 | else | |
1258 | info->flags &= ~IEEE80211_TX_CTL_NO_ACK; | |
badffb72 | 1259 | } |
58d4185e | 1260 | |
5cf121c3 JB |
1261 | if (tx->flags & IEEE80211_TX_FRAGMENTED) { |
1262 | if ((tx->flags & IEEE80211_TX_UNICAST) && | |
b9a5f8ca | 1263 | skb->len + FCS_LEN > local->hw.wiphy->frag_threshold && |
8d5e0d58 | 1264 | !(info->flags & IEEE80211_TX_CTL_AMPDU)) |
5cf121c3 | 1265 | tx->flags |= IEEE80211_TX_FRAGMENTED; |
58d4185e | 1266 | else |
5cf121c3 | 1267 | tx->flags &= ~IEEE80211_TX_FRAGMENTED; |
58d4185e JB |
1268 | } |
1269 | ||
e2ebc74d | 1270 | if (!tx->sta) |
e039fa4a | 1271 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
07346f81 | 1272 | else if (test_and_clear_sta_flags(tx->sta, WLAN_STA_CLEAR_PS_FILT)) |
e039fa4a | 1273 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
58d4185e | 1274 | |
b73d70ad | 1275 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2ebc74d JB |
1276 | if (skb->len > hdrlen + sizeof(rfc1042_header) + 2) { |
1277 | u8 *pos = &skb->data[hdrlen + sizeof(rfc1042_header)]; | |
1278 | tx->ethertype = (pos[0] << 8) | pos[1]; | |
1279 | } | |
e039fa4a | 1280 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1281 | |
9ae54c84 | 1282 | return TX_CONTINUE; |
e2ebc74d JB |
1283 | } |
1284 | ||
7bb45683 JB |
1285 | /* |
1286 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1287 | */ | |
1288 | static bool __ieee80211_tx(struct ieee80211_local *local, struct sk_buff **skbp, | |
1289 | struct sta_info *sta, bool txpending) | |
e2ebc74d | 1290 | { |
1870cd71 | 1291 | struct sk_buff *skb = *skbp, *next; |
f8e79ddd | 1292 | struct ieee80211_tx_info *info; |
5061b0c2 | 1293 | struct ieee80211_sub_if_data *sdata; |
3b8d81e0 | 1294 | unsigned long flags; |
7bb45683 | 1295 | int len; |
2de8e0d9 | 1296 | bool fragm = false; |
e2ebc74d | 1297 | |
2de8e0d9 | 1298 | while (skb) { |
3b8d81e0 | 1299 | int q = skb_get_queue_mapping(skb); |
e1e54068 | 1300 | __le16 fc; |
3b8d81e0 JB |
1301 | |
1302 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1303 | if (local->queue_stop_reasons[q] || |
7bb45683 JB |
1304 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
1305 | /* | |
1306 | * Since queue is stopped, queue up frames for later | |
1307 | * transmission from the tx-pending tasklet when the | |
1308 | * queue is woken again. | |
1309 | */ | |
1310 | ||
1311 | do { | |
1312 | next = skb->next; | |
1313 | skb->next = NULL; | |
1314 | /* | |
1315 | * NB: If txpending is true, next must already | |
1316 | * be NULL since we must've gone through this | |
1317 | * loop before already; therefore we can just | |
1318 | * queue the frame to the head without worrying | |
1319 | * about reordering of fragments. | |
1320 | */ | |
1321 | if (unlikely(txpending)) | |
1322 | __skb_queue_head(&local->pending[q], | |
1323 | skb); | |
1324 | else | |
1325 | __skb_queue_tail(&local->pending[q], | |
1326 | skb); | |
1327 | } while ((skb = next)); | |
1328 | ||
1329 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1330 | flags); | |
1331 | return false; | |
1332 | } | |
3b8d81e0 | 1333 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1334 | |
f0e72851 JB |
1335 | info = IEEE80211_SKB_CB(skb); |
1336 | ||
1337 | if (fragm) | |
e6a9854b | 1338 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | |
e039fa4a | 1339 | IEEE80211_TX_CTL_FIRST_FRAGMENT); |
f0e72851 | 1340 | |
2de8e0d9 | 1341 | next = skb->next; |
a220858d | 1342 | len = skb->len; |
5061b0c2 | 1343 | |
ad5351db JB |
1344 | if (next) |
1345 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
1346 | ||
5061b0c2 JB |
1347 | sdata = vif_to_sdata(info->control.vif); |
1348 | ||
1349 | switch (sdata->vif.type) { | |
1350 | case NL80211_IFTYPE_MONITOR: | |
1351 | info->control.vif = NULL; | |
1352 | break; | |
1353 | case NL80211_IFTYPE_AP_VLAN: | |
1354 | info->control.vif = &container_of(sdata->bss, | |
1355 | struct ieee80211_sub_if_data, u.ap)->vif; | |
1356 | break; | |
1357 | default: | |
1358 | /* keep */ | |
1359 | break; | |
1360 | } | |
1361 | ||
ec25acc4 JB |
1362 | if (sta && sta->uploaded) |
1363 | info->control.sta = &sta->sta; | |
1364 | else | |
1365 | info->control.sta = NULL; | |
1366 | ||
e1e54068 | 1367 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
7bb45683 | 1368 | drv_tx(local, skb); |
21f5fc75 | 1369 | |
e1e54068 | 1370 | ieee80211_tpt_led_trig_tx(local, fc, len); |
1870cd71 | 1371 | *skbp = skb = next; |
2de8e0d9 JB |
1372 | ieee80211_led_tx(local, 1); |
1373 | fragm = true; | |
e2ebc74d | 1374 | } |
2de8e0d9 | 1375 | |
7bb45683 | 1376 | return true; |
e2ebc74d JB |
1377 | } |
1378 | ||
97b045d6 JB |
1379 | /* |
1380 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1381 | * frame was dropped or queued. | |
1382 | */ | |
1383 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) | |
1384 | { | |
97b045d6 | 1385 | struct sk_buff *skb = tx->skb; |
c6fcf6bc | 1386 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
97b045d6 | 1387 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1388 | |
9aa4aee3 JB |
1389 | #define CALL_TXH(txh) \ |
1390 | do { \ | |
1391 | res = txh(tx); \ | |
1392 | if (res != TX_CONTINUE) \ | |
1393 | goto txh_done; \ | |
1394 | } while (0) | |
1395 | ||
5c1b98a5 | 1396 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1397 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1398 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1399 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1400 | CALL_TXH(ieee80211_tx_h_select_key); |
af65cd96 JB |
1401 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1402 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
c6fcf6bc JB |
1403 | |
1404 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) | |
1405 | goto txh_done; | |
1406 | ||
1407 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1408 | CALL_TXH(ieee80211_tx_h_sequence); |
1409 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1410 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1411 | CALL_TXH(ieee80211_tx_h_stats); |
1412 | CALL_TXH(ieee80211_tx_h_encrypt); | |
8fd369ee AN |
1413 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1414 | CALL_TXH(ieee80211_tx_h_calculate_duration); | |
d9e8a70f | 1415 | #undef CALL_TXH |
97b045d6 | 1416 | |
d9e8a70f | 1417 | txh_done: |
97b045d6 | 1418 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1419 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
2de8e0d9 JB |
1420 | while (skb) { |
1421 | struct sk_buff *next; | |
1422 | ||
1423 | next = skb->next; | |
1424 | dev_kfree_skb(skb); | |
1425 | skb = next; | |
1426 | } | |
97b045d6 JB |
1427 | return -1; |
1428 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1429 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1430 | return -1; |
1431 | } | |
1432 | ||
1433 | return 0; | |
1434 | } | |
1435 | ||
7bb45683 JB |
1436 | /* |
1437 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1438 | */ | |
1439 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
3b8d81e0 | 1440 | struct sk_buff *skb, bool txpending) |
e2ebc74d | 1441 | { |
3b8d81e0 | 1442 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1443 | struct ieee80211_tx_data tx; |
97b045d6 | 1444 | ieee80211_tx_result res_prepare; |
e039fa4a | 1445 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1446 | bool result = true; |
e2ebc74d | 1447 | |
e2ebc74d JB |
1448 | if (unlikely(skb->len < 10)) { |
1449 | dev_kfree_skb(skb); | |
7bb45683 | 1450 | return true; |
e2ebc74d JB |
1451 | } |
1452 | ||
d0709a65 JB |
1453 | rcu_read_lock(); |
1454 | ||
58d4185e | 1455 | /* initialises tx */ |
3b8d81e0 | 1456 | res_prepare = ieee80211_tx_prepare(sdata, &tx, skb); |
e2ebc74d | 1457 | |
cd8ffc80 | 1458 | if (unlikely(res_prepare == TX_DROP)) { |
e2ebc74d | 1459 | dev_kfree_skb(skb); |
7bb45683 | 1460 | goto out; |
cd8ffc80 | 1461 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
7bb45683 | 1462 | goto out; |
e2ebc74d JB |
1463 | } |
1464 | ||
5cf121c3 | 1465 | tx.channel = local->hw.conf.channel; |
e039fa4a | 1466 | info->band = tx.channel->band; |
e2ebc74d | 1467 | |
7bb45683 JB |
1468 | if (!invoke_tx_handlers(&tx)) |
1469 | result = __ieee80211_tx(local, &tx.skb, tx.sta, txpending); | |
97b045d6 | 1470 | out: |
d4e46a3d | 1471 | rcu_read_unlock(); |
7bb45683 | 1472 | return result; |
e2ebc74d JB |
1473 | } |
1474 | ||
1475 | /* device xmit handlers */ | |
1476 | ||
23c0752a JB |
1477 | static int ieee80211_skb_resize(struct ieee80211_local *local, |
1478 | struct sk_buff *skb, | |
1479 | int head_need, bool may_encrypt) | |
1480 | { | |
1481 | int tail_need = 0; | |
1482 | ||
ab6a44ce JL |
1483 | /* |
1484 | * This could be optimised, devices that do full hardware | |
1485 | * crypto (including TKIP MMIC) need no tailroom... But we | |
1486 | * have no drivers for such devices currently. | |
1487 | */ | |
1488 | if (may_encrypt) { | |
23c0752a JB |
1489 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1490 | tail_need -= skb_tailroom(skb); | |
1491 | tail_need = max_t(int, tail_need, 0); | |
1492 | } | |
1493 | ||
1494 | if (head_need || tail_need) { | |
1495 | /* Sorry. Can't account for this any more */ | |
1496 | skb_orphan(skb); | |
1497 | } | |
1498 | ||
fc7c976d | 1499 | if (skb_cloned(skb)) |
23c0752a | 1500 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1501 | else if (head_need || tail_need) |
23c0752a | 1502 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1503 | else |
1504 | return 0; | |
23c0752a JB |
1505 | |
1506 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1507 | wiphy_debug(local->hw.wiphy, |
1508 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1509 | return -ENOMEM; |
1510 | } | |
1511 | ||
1512 | /* update truesize too */ | |
1513 | skb->truesize += head_need + tail_need; | |
1514 | ||
1515 | return 0; | |
1516 | } | |
1517 | ||
3b8d81e0 JB |
1518 | static void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, |
1519 | struct sk_buff *skb) | |
e2ebc74d | 1520 | { |
3b8d81e0 | 1521 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1522 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1523 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
3b8d81e0 | 1524 | struct ieee80211_sub_if_data *tmp_sdata; |
e2ebc74d | 1525 | int headroom; |
23c0752a | 1526 | bool may_encrypt; |
e2ebc74d | 1527 | |
d84f3234 JB |
1528 | rcu_read_lock(); |
1529 | ||
cca89496 | 1530 | if (unlikely(sdata->vif.type == NL80211_IFTYPE_MONITOR)) { |
25d834e1 JB |
1531 | int hdrlen; |
1532 | u16 len_rthdr; | |
1533 | ||
17ad353b FF |
1534 | info->flags |= IEEE80211_TX_CTL_INJECTED | |
1535 | IEEE80211_TX_INTFL_HAS_RADIOTAP; | |
25d834e1 JB |
1536 | |
1537 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
8ef86c7b | 1538 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); |
25d834e1 JB |
1539 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
1540 | ||
1541 | /* check the header is complete in the frame */ | |
1542 | if (likely(skb->len >= len_rthdr + hdrlen)) { | |
1543 | /* | |
1544 | * We process outgoing injected frames that have a | |
1545 | * local address we handle as though they are our | |
1546 | * own frames. | |
1547 | * This code here isn't entirely correct, the local | |
1548 | * MAC address is not necessarily enough to find | |
1549 | * the interface to use; for that proper VLAN/WDS | |
1550 | * support we will need a different mechanism. | |
1551 | */ | |
1552 | ||
3b8d81e0 | 1553 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, |
25d834e1 | 1554 | list) { |
9607e6b6 | 1555 | if (!ieee80211_sdata_running(tmp_sdata)) |
25d834e1 | 1556 | continue; |
7dff3125 JM |
1557 | if (tmp_sdata->vif.type == |
1558 | NL80211_IFTYPE_MONITOR || | |
1559 | tmp_sdata->vif.type == | |
1560 | NL80211_IFTYPE_AP_VLAN || | |
1561 | tmp_sdata->vif.type == | |
1562 | NL80211_IFTYPE_WDS) | |
f1b33cb1 | 1563 | continue; |
47846c9b | 1564 | if (compare_ether_addr(tmp_sdata->vif.addr, |
9b1ce526 | 1565 | hdr->addr2) == 0) { |
3b8d81e0 | 1566 | sdata = tmp_sdata; |
25d834e1 JB |
1567 | break; |
1568 | } | |
1569 | } | |
25d834e1 | 1570 | } |
e32f85f7 LCC |
1571 | } |
1572 | ||
3b8d81e0 | 1573 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1574 | |
3b8d81e0 | 1575 | headroom = local->tx_headroom; |
23c0752a JB |
1576 | if (may_encrypt) |
1577 | headroom += IEEE80211_ENCRYPT_HEADROOM; | |
1578 | headroom -= skb_headroom(skb); | |
1579 | headroom = max_t(int, 0, headroom); | |
1580 | ||
3b8d81e0 | 1581 | if (ieee80211_skb_resize(local, skb, headroom, may_encrypt)) { |
23c0752a | 1582 | dev_kfree_skb(skb); |
d84f3234 | 1583 | rcu_read_unlock(); |
3b8d81e0 | 1584 | return; |
e2ebc74d JB |
1585 | } |
1586 | ||
740c1aa3 | 1587 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1588 | info->control.vif = &sdata->vif; |
e2ebc74d | 1589 | |
cca89496 JC |
1590 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
1591 | ieee80211_is_data(hdr->frame_control) && | |
1592 | !is_multicast_ether_addr(hdr->addr1)) | |
1593 | if (mesh_nexthop_lookup(skb, sdata)) { | |
1594 | /* skb queued: don't free */ | |
d84f3234 | 1595 | rcu_read_unlock(); |
cca89496 JC |
1596 | return; |
1597 | } | |
1598 | ||
cf0277e7 | 1599 | ieee80211_set_qos_hdr(local, skb); |
3b8d81e0 | 1600 | ieee80211_tx(sdata, skb, false); |
d84f3234 | 1601 | rcu_read_unlock(); |
e2ebc74d JB |
1602 | } |
1603 | ||
d0cf9c0d SH |
1604 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1605 | struct net_device *dev) | |
e2ebc74d JB |
1606 | { |
1607 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
47f4d887 | 1608 | struct ieee80211_channel *chan = local->hw.conf.channel; |
e2ebc74d JB |
1609 | struct ieee80211_radiotap_header *prthdr = |
1610 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 1611 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
9b8a74e3 | 1612 | u16 len_rthdr; |
e2ebc74d | 1613 | |
47f4d887 LR |
1614 | /* |
1615 | * Frame injection is not allowed if beaconing is not allowed | |
1616 | * or if we need radar detection. Beaconing is usually not allowed when | |
1617 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
1618 | * Passive scan is also used in world regulatory domains where | |
1619 | * your country is not known and as such it should be treated as | |
1620 | * NO TX unless the channel is explicitly allowed in which case | |
1621 | * your current regulatory domain would not have the passive scan | |
1622 | * flag. | |
1623 | * | |
1624 | * Since AP mode uses monitor interfaces to inject/TX management | |
1625 | * frames we can make AP mode the exception to this rule once it | |
1626 | * supports radar detection as its implementation can deal with | |
1627 | * radar detection by itself. We can do that later by adding a | |
1628 | * monitor flag interfaces used for AP support. | |
1629 | */ | |
1630 | if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR | | |
1631 | IEEE80211_CHAN_PASSIVE_SCAN))) | |
1632 | goto fail; | |
1633 | ||
9b8a74e3 AG |
1634 | /* check for not even having the fixed radiotap header part */ |
1635 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
1636 | goto fail; /* too short to be possibly valid */ | |
1637 | ||
1638 | /* is it a header version we can trust to find length from? */ | |
1639 | if (unlikely(prthdr->it_version)) | |
1640 | goto fail; /* only version 0 is supported */ | |
1641 | ||
1642 | /* then there must be a radiotap header with a length we can use */ | |
1643 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
1644 | ||
1645 | /* does the skb contain enough to deliver on the alleged length? */ | |
1646 | if (unlikely(skb->len < len_rthdr)) | |
1647 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 1648 | |
e2ebc74d JB |
1649 | /* |
1650 | * fix up the pointers accounting for the radiotap | |
1651 | * header still being in there. We are being given | |
1652 | * a precooked IEEE80211 header so no need for | |
1653 | * normal processing | |
1654 | */ | |
9b8a74e3 | 1655 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 1656 | /* |
9b8a74e3 AG |
1657 | * these are just fixed to the end of the rt area since we |
1658 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 1659 | */ |
9b8a74e3 AG |
1660 | skb_set_network_header(skb, len_rthdr); |
1661 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 1662 | |
3b8d81e0 JB |
1663 | memset(info, 0, sizeof(*info)); |
1664 | ||
7351c6bd JB |
1665 | info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; |
1666 | ||
3b8d81e0 JB |
1667 | /* pass the radiotap header up to xmit */ |
1668 | ieee80211_xmit(IEEE80211_DEV_TO_SUB_IF(dev), skb); | |
e2ebc74d | 1669 | return NETDEV_TX_OK; |
9b8a74e3 AG |
1670 | |
1671 | fail: | |
1672 | dev_kfree_skb(skb); | |
1673 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
1674 | } |
1675 | ||
1676 | /** | |
1677 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type | |
1678 | * subinterfaces (wlan#, WDS, and VLAN interfaces) | |
1679 | * @skb: packet to be sent | |
1680 | * @dev: incoming interface | |
1681 | * | |
1682 | * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will | |
1683 | * not be freed, and caller is responsible for either retrying later or freeing | |
1684 | * skb). | |
1685 | * | |
1686 | * This function takes in an Ethernet header and encapsulates it with suitable | |
1687 | * IEEE 802.11 header based on which interface the packet is coming in. The | |
1688 | * encapsulated packet will then be passed to master interface, wlan#.11, for | |
1689 | * transmission (through low-level driver). | |
1690 | */ | |
d0cf9c0d SH |
1691 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
1692 | struct net_device *dev) | |
e2ebc74d | 1693 | { |
133b8226 JB |
1694 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
1695 | struct ieee80211_local *local = sdata->local; | |
489ee919 | 1696 | struct ieee80211_tx_info *info; |
5b548140 | 1697 | int ret = NETDEV_TX_BUSY, head_need; |
065e9605 HH |
1698 | u16 ethertype, hdrlen, meshhdrlen = 0; |
1699 | __le16 fc; | |
e2ebc74d | 1700 | struct ieee80211_hdr hdr; |
ff67bb86 | 1701 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
0a65169b | 1702 | struct mesh_path __maybe_unused *mppath = NULL; |
e2ebc74d JB |
1703 | const u8 *encaps_data; |
1704 | int encaps_len, skip_header_bytes; | |
e8bf9649 | 1705 | int nh_pos, h_pos; |
f14543ee | 1706 | struct sta_info *sta = NULL; |
ce3edf6d | 1707 | u32 sta_flags = 0; |
7e244707 | 1708 | struct sk_buff *tmp_skb; |
e2ebc74d | 1709 | |
e2ebc74d | 1710 | if (unlikely(skb->len < ETH_HLEN)) { |
ec634fe3 | 1711 | ret = NETDEV_TX_OK; |
e2ebc74d JB |
1712 | goto fail; |
1713 | } | |
1714 | ||
e2ebc74d JB |
1715 | /* convert Ethernet header to proper 802.11 header (based on |
1716 | * operation mode) */ | |
1717 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 1718 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 1719 | |
51fb61e7 | 1720 | switch (sdata->vif.type) { |
05c914fe | 1721 | case NL80211_IFTYPE_AP_VLAN: |
f14543ee | 1722 | rcu_read_lock(); |
9bc383de | 1723 | sta = rcu_dereference(sdata->u.vlan.sta); |
f14543ee FF |
1724 | if (sta) { |
1725 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
1726 | /* RA TA DA SA */ | |
1727 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 1728 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1729 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1730 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1731 | hdrlen = 30; | |
1732 | sta_flags = get_sta_flags(sta); | |
1733 | } | |
1734 | rcu_read_unlock(); | |
1735 | if (sta) | |
1736 | break; | |
1737 | /* fall through */ | |
1738 | case NL80211_IFTYPE_AP: | |
065e9605 | 1739 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
1740 | /* DA BSSID SA */ |
1741 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 1742 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1743 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
1744 | hdrlen = 24; | |
cf966838 | 1745 | break; |
05c914fe | 1746 | case NL80211_IFTYPE_WDS: |
065e9605 | 1747 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
1748 | /* RA TA DA SA */ |
1749 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 1750 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1751 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1752 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1753 | hdrlen = 30; | |
cf966838 | 1754 | break; |
33b64eb2 | 1755 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 1756 | case NL80211_IFTYPE_MESH_POINT: |
472dbc45 | 1757 | if (!sdata->u.mesh.mshcfg.dot11MeshTTL) { |
e32f85f7 | 1758 | /* Do not send frames with mesh_ttl == 0 */ |
472dbc45 | 1759 | sdata->u.mesh.mshstats.dropped_frames_ttl++; |
ec634fe3 | 1760 | ret = NETDEV_TX_OK; |
e32f85f7 | 1761 | goto fail; |
33b64eb2 | 1762 | } |
28104cae | 1763 | rcu_read_lock(); |
f76b57b4 JF |
1764 | if (!is_multicast_ether_addr(skb->data)) |
1765 | mppath = mpp_path_lookup(skb->data, sdata); | |
79617dee | 1766 | |
f76b57b4 | 1767 | /* |
9d52501b JF |
1768 | * Use address extension if it is a packet from |
1769 | * another interface or if we know the destination | |
1770 | * is being proxied by a portal (i.e. portal address | |
1771 | * differs from proxied address) | |
f76b57b4 | 1772 | */ |
47846c9b | 1773 | if (compare_ether_addr(sdata->vif.addr, |
f76b57b4 | 1774 | skb->data + ETH_ALEN) == 0 && |
9d52501b | 1775 | !(mppath && compare_ether_addr(mppath->mpp, skb->data))) { |
3c5772a5 JC |
1776 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
1777 | skb->data, skb->data + ETH_ALEN); | |
28104cae | 1778 | rcu_read_unlock(); |
3c5772a5 | 1779 | meshhdrlen = ieee80211_new_mesh_header(&mesh_hdr, |
61ad5394 | 1780 | sdata, NULL, NULL); |
79617dee | 1781 | } else { |
3c5772a5 | 1782 | int is_mesh_mcast = 1; |
15ff6365 | 1783 | const u8 *mesh_da; |
79617dee | 1784 | |
79617dee | 1785 | if (is_multicast_ether_addr(skb->data)) |
3c5772a5 JC |
1786 | /* DA TA mSA AE:SA */ |
1787 | mesh_da = skb->data; | |
79617dee | 1788 | else { |
15ff6365 JB |
1789 | static const u8 bcast[ETH_ALEN] = |
1790 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; | |
3c5772a5 JC |
1791 | if (mppath) { |
1792 | /* RA TA mDA mSA AE:DA SA */ | |
1793 | mesh_da = mppath->mpp; | |
1794 | is_mesh_mcast = 0; | |
15ff6365 | 1795 | } else { |
3c5772a5 | 1796 | /* DA TA mSA AE:SA */ |
15ff6365 JB |
1797 | mesh_da = bcast; |
1798 | } | |
79617dee | 1799 | } |
3c5772a5 | 1800 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 1801 | mesh_da, sdata->vif.addr); |
3c5772a5 JC |
1802 | rcu_read_unlock(); |
1803 | if (is_mesh_mcast) | |
1804 | meshhdrlen = | |
1805 | ieee80211_new_mesh_header(&mesh_hdr, | |
1806 | sdata, | |
1807 | skb->data + ETH_ALEN, | |
3c5772a5 JC |
1808 | NULL); |
1809 | else | |
1810 | meshhdrlen = | |
1811 | ieee80211_new_mesh_header(&mesh_hdr, | |
1812 | sdata, | |
3c5772a5 JC |
1813 | skb->data, |
1814 | skb->data + ETH_ALEN); | |
79617dee | 1815 | |
79617dee | 1816 | } |
33b64eb2 LCC |
1817 | break; |
1818 | #endif | |
05c914fe | 1819 | case NL80211_IFTYPE_STATION: |
46900298 | 1820 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
a621fa4d JB |
1821 | if (sdata->u.mgd.use_4addr && |
1822 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
f14543ee FF |
1823 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
1824 | /* RA TA DA SA */ | |
47846c9b | 1825 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1826 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1827 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1828 | hdrlen = 30; | |
1829 | } else { | |
1830 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
1831 | /* BSSID SA DA */ | |
1832 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1833 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
1834 | hdrlen = 24; | |
1835 | } | |
cf966838 | 1836 | break; |
05c914fe | 1837 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
1838 | /* DA SA BSSID */ |
1839 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1840 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 1841 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 1842 | hdrlen = 24; |
cf966838 JB |
1843 | break; |
1844 | default: | |
ec634fe3 | 1845 | ret = NETDEV_TX_OK; |
e2ebc74d JB |
1846 | goto fail; |
1847 | } | |
1848 | ||
7d185b8b JB |
1849 | /* |
1850 | * There's no need to try to look up the destination | |
1851 | * if it is a multicast address (which can only happen | |
1852 | * in AP mode) | |
1853 | */ | |
1854 | if (!is_multicast_ether_addr(hdr.addr1)) { | |
d0709a65 | 1855 | rcu_read_lock(); |
abe60632 JB |
1856 | sta = sta_info_get(sdata, hdr.addr1); |
1857 | if (sta) | |
07346f81 | 1858 | sta_flags = get_sta_flags(sta); |
d0709a65 | 1859 | rcu_read_unlock(); |
e2ebc74d JB |
1860 | } |
1861 | ||
3434fbd3 | 1862 | /* receiver and we are QoS enabled, use a QoS type frame */ |
176be728 | 1863 | if ((sta_flags & WLAN_STA_WME) && local->hw.queues >= 4) { |
065e9605 | 1864 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
1865 | hdrlen += 2; |
1866 | } | |
1867 | ||
1868 | /* | |
238814fd JB |
1869 | * Drop unicast frames to unauthorised stations unless they are |
1870 | * EAPOL frames from the local station. | |
ce3edf6d | 1871 | */ |
e32f85f7 LCC |
1872 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
1873 | unlikely(!is_multicast_ether_addr(hdr.addr1) && | |
33b64eb2 | 1874 | !(sta_flags & WLAN_STA_AUTHORIZED) && |
a621fa4d | 1875 | !(cpu_to_be16(ethertype) == sdata->control_port_protocol && |
47846c9b | 1876 | compare_ether_addr(sdata->vif.addr, |
ce3edf6d JB |
1877 | skb->data + ETH_ALEN) == 0))) { |
1878 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
ce3edf6d | 1879 | if (net_ratelimit()) |
0c68ae26 | 1880 | printk(KERN_DEBUG "%s: dropped frame to %pM" |
ce3edf6d | 1881 | " (unauthorized port)\n", dev->name, |
0c68ae26 | 1882 | hdr.addr1); |
ce3edf6d JB |
1883 | #endif |
1884 | ||
1885 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
1886 | ||
ec634fe3 | 1887 | ret = NETDEV_TX_OK; |
ce3edf6d JB |
1888 | goto fail; |
1889 | } | |
1890 | ||
7e244707 HS |
1891 | /* |
1892 | * If the skb is shared we need to obtain our own copy. | |
1893 | */ | |
1894 | if (skb_shared(skb)) { | |
1895 | tmp_skb = skb; | |
f8a0a781 | 1896 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
1897 | kfree_skb(tmp_skb); |
1898 | ||
1899 | if (!skb) { | |
1900 | ret = NETDEV_TX_OK; | |
1901 | goto fail; | |
1902 | } | |
1903 | } | |
1904 | ||
065e9605 | 1905 | hdr.frame_control = fc; |
e2ebc74d JB |
1906 | hdr.duration_id = 0; |
1907 | hdr.seq_ctrl = 0; | |
1908 | ||
1909 | skip_header_bytes = ETH_HLEN; | |
1910 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
1911 | encaps_data = bridge_tunnel_header; | |
1912 | encaps_len = sizeof(bridge_tunnel_header); | |
1913 | skip_header_bytes -= 2; | |
1914 | } else if (ethertype >= 0x600) { | |
1915 | encaps_data = rfc1042_header; | |
1916 | encaps_len = sizeof(rfc1042_header); | |
1917 | skip_header_bytes -= 2; | |
1918 | } else { | |
1919 | encaps_data = NULL; | |
1920 | encaps_len = 0; | |
1921 | } | |
1922 | ||
7e244707 HS |
1923 | nh_pos = skb_network_header(skb) - skb->data; |
1924 | h_pos = skb_transport_header(skb) - skb->data; | |
1925 | ||
e2ebc74d JB |
1926 | skb_pull(skb, skip_header_bytes); |
1927 | nh_pos -= skip_header_bytes; | |
1928 | h_pos -= skip_header_bytes; | |
1929 | ||
23c0752a | 1930 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 1931 | |
23c0752a JB |
1932 | /* |
1933 | * So we need to modify the skb header and hence need a copy of | |
1934 | * that. The head_need variable above doesn't, so far, include | |
1935 | * the needed header space that we don't need right away. If we | |
1936 | * can, then we don't reallocate right now but only after the | |
1937 | * frame arrives at the master device (if it does...) | |
1938 | * | |
1939 | * If we cannot, however, then we will reallocate to include all | |
1940 | * the ever needed space. Also, if we need to reallocate it anyway, | |
1941 | * make it big enough for everything we may ever need. | |
1942 | */ | |
e2ebc74d | 1943 | |
3a5be7d4 | 1944 | if (head_need > 0 || skb_cloned(skb)) { |
23c0752a JB |
1945 | head_need += IEEE80211_ENCRYPT_HEADROOM; |
1946 | head_need += local->tx_headroom; | |
1947 | head_need = max_t(int, 0, head_need); | |
1948 | if (ieee80211_skb_resize(local, skb, head_need, true)) | |
e2ebc74d | 1949 | goto fail; |
e2ebc74d JB |
1950 | } |
1951 | ||
1952 | if (encaps_data) { | |
1953 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
1954 | nh_pos += encaps_len; | |
1955 | h_pos += encaps_len; | |
1956 | } | |
c29b9b9b | 1957 | |
e4ab7eb0 | 1958 | #ifdef CONFIG_MAC80211_MESH |
33b64eb2 LCC |
1959 | if (meshhdrlen > 0) { |
1960 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); | |
1961 | nh_pos += meshhdrlen; | |
1962 | h_pos += meshhdrlen; | |
1963 | } | |
e4ab7eb0 | 1964 | #endif |
33b64eb2 | 1965 | |
065e9605 | 1966 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
1967 | __le16 *qos_control; |
1968 | ||
1969 | qos_control = (__le16*) skb_push(skb, 2); | |
1970 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); | |
1971 | /* | |
1972 | * Maybe we could actually set some fields here, for now just | |
1973 | * initialise to zero to indicate no special operation. | |
1974 | */ | |
1975 | *qos_control = 0; | |
1976 | } else | |
1977 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
1978 | ||
e2ebc74d JB |
1979 | nh_pos += hdrlen; |
1980 | h_pos += hdrlen; | |
1981 | ||
68aae116 SH |
1982 | dev->stats.tx_packets++; |
1983 | dev->stats.tx_bytes += skb->len; | |
e2ebc74d JB |
1984 | |
1985 | /* Update skb pointers to various headers since this modified frame | |
1986 | * is going to go through Linux networking code that may potentially | |
1987 | * need things like pointer to IP header. */ | |
1988 | skb_set_mac_header(skb, 0); | |
1989 | skb_set_network_header(skb, nh_pos); | |
1990 | skb_set_transport_header(skb, h_pos); | |
1991 | ||
489ee919 | 1992 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
1993 | memset(info, 0, sizeof(*info)); |
1994 | ||
e2ebc74d | 1995 | dev->trans_start = jiffies; |
3b8d81e0 | 1996 | ieee80211_xmit(sdata, skb); |
e2ebc74d | 1997 | |
ec634fe3 | 1998 | return NETDEV_TX_OK; |
e2ebc74d JB |
1999 | |
2000 | fail: | |
ec634fe3 | 2001 | if (ret == NETDEV_TX_OK) |
e2ebc74d JB |
2002 | dev_kfree_skb(skb); |
2003 | ||
2004 | return ret; | |
2005 | } | |
2006 | ||
e2ebc74d | 2007 | |
e2530083 JB |
2008 | /* |
2009 | * ieee80211_clear_tx_pending may not be called in a context where | |
2010 | * it is possible that it packets could come in again. | |
2011 | */ | |
e2ebc74d JB |
2012 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
2013 | { | |
2de8e0d9 | 2014 | int i; |
e2ebc74d | 2015 | |
2a577d98 JB |
2016 | for (i = 0; i < local->hw.queues; i++) |
2017 | skb_queue_purge(&local->pending[i]); | |
e2ebc74d JB |
2018 | } |
2019 | ||
7bb45683 JB |
2020 | /* |
2021 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
2022 | * which in this case means re-queued -- take as an indication to stop sending | |
2023 | * more pending frames. | |
2024 | */ | |
cd8ffc80 JB |
2025 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
2026 | struct sk_buff *skb) | |
2027 | { | |
2028 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2029 | struct ieee80211_sub_if_data *sdata; | |
2030 | struct sta_info *sta; | |
2031 | struct ieee80211_hdr *hdr; | |
7bb45683 | 2032 | bool result; |
cd8ffc80 | 2033 | |
5061b0c2 | 2034 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
2035 | |
2036 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
7bb45683 | 2037 | result = ieee80211_tx(sdata, skb, true); |
cd8ffc80 JB |
2038 | } else { |
2039 | hdr = (struct ieee80211_hdr *)skb->data; | |
abe60632 | 2040 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 2041 | |
7bb45683 | 2042 | result = __ieee80211_tx(local, &skb, sta, true); |
cd8ffc80 JB |
2043 | } |
2044 | ||
cd8ffc80 JB |
2045 | return result; |
2046 | } | |
2047 | ||
e2530083 | 2048 | /* |
3b8d81e0 | 2049 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 2050 | */ |
e2ebc74d JB |
2051 | void ieee80211_tx_pending(unsigned long data) |
2052 | { | |
2053 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
7236fe29 | 2054 | struct ieee80211_sub_if_data *sdata; |
2a577d98 | 2055 | unsigned long flags; |
cd8ffc80 | 2056 | int i; |
3b8d81e0 | 2057 | bool txok; |
e2ebc74d | 2058 | |
f0e72851 | 2059 | rcu_read_lock(); |
e2530083 | 2060 | |
3b8d81e0 | 2061 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
2062 | for (i = 0; i < local->hw.queues; i++) { |
2063 | /* | |
2064 | * If queue is stopped by something other than due to pending | |
2065 | * frames, or we have no pending frames, proceed to next queue. | |
2066 | */ | |
3b8d81e0 | 2067 | if (local->queue_stop_reasons[i] || |
2a577d98 | 2068 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 2069 | continue; |
e2530083 | 2070 | |
2a577d98 | 2071 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 2072 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 2073 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 2074 | |
a7bc376c JB |
2075 | if (WARN_ON(!info->control.vif)) { |
2076 | kfree_skb(skb); | |
2077 | continue; | |
2078 | } | |
2079 | ||
3b8d81e0 JB |
2080 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
2081 | flags); | |
2082 | ||
2083 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
2084 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
2085 | flags); | |
2086 | if (!txok) | |
2a577d98 | 2087 | break; |
e2ebc74d | 2088 | } |
7236fe29 JB |
2089 | |
2090 | if (skb_queue_empty(&local->pending[i])) | |
2091 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2337db8d | 2092 | netif_wake_subqueue(sdata->dev, i); |
e2ebc74d | 2093 | } |
3b8d81e0 | 2094 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 2095 | |
f0e72851 | 2096 | rcu_read_unlock(); |
e2ebc74d JB |
2097 | } |
2098 | ||
2099 | /* functions for drivers to get certain frames */ | |
2100 | ||
8e7be8da | 2101 | static void ieee80211_beacon_add_tim(struct ieee80211_if_ap *bss, |
5dfdaf58 JB |
2102 | struct sk_buff *skb, |
2103 | struct beacon_data *beacon) | |
e2ebc74d JB |
2104 | { |
2105 | u8 *pos, *tim; | |
2106 | int aid0 = 0; | |
2107 | int i, have_bits = 0, n1, n2; | |
2108 | ||
2109 | /* Generate bitmap for TIM only if there are any STAs in power save | |
2110 | * mode. */ | |
e2ebc74d JB |
2111 | if (atomic_read(&bss->num_sta_ps) > 0) |
2112 | /* in the hope that this is faster than | |
2113 | * checking byte-for-byte */ | |
2114 | have_bits = !bitmap_empty((unsigned long*)bss->tim, | |
2115 | IEEE80211_MAX_AID+1); | |
2116 | ||
2117 | if (bss->dtim_count == 0) | |
5dfdaf58 | 2118 | bss->dtim_count = beacon->dtim_period - 1; |
e2ebc74d JB |
2119 | else |
2120 | bss->dtim_count--; | |
2121 | ||
2122 | tim = pos = (u8 *) skb_put(skb, 6); | |
2123 | *pos++ = WLAN_EID_TIM; | |
2124 | *pos++ = 4; | |
2125 | *pos++ = bss->dtim_count; | |
5dfdaf58 | 2126 | *pos++ = beacon->dtim_period; |
e2ebc74d JB |
2127 | |
2128 | if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf)) | |
2129 | aid0 = 1; | |
2130 | ||
512119b3 CL |
2131 | bss->dtim_bc_mc = aid0 == 1; |
2132 | ||
e2ebc74d JB |
2133 | if (have_bits) { |
2134 | /* Find largest even number N1 so that bits numbered 1 through | |
2135 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
2136 | * (N2 + 1) x 8 through 2007 are 0. */ | |
2137 | n1 = 0; | |
2138 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
2139 | if (bss->tim[i]) { | |
2140 | n1 = i & 0xfe; | |
2141 | break; | |
2142 | } | |
2143 | } | |
2144 | n2 = n1; | |
2145 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
2146 | if (bss->tim[i]) { | |
2147 | n2 = i; | |
2148 | break; | |
2149 | } | |
2150 | } | |
2151 | ||
2152 | /* Bitmap control */ | |
2153 | *pos++ = n1 | aid0; | |
2154 | /* Part Virt Bitmap */ | |
2155 | memcpy(pos, bss->tim + n1, n2 - n1 + 1); | |
2156 | ||
2157 | tim[1] = n2 - n1 + 4; | |
2158 | skb_put(skb, n2 - n1); | |
2159 | } else { | |
2160 | *pos++ = aid0; /* Bitmap control */ | |
2161 | *pos++ = 0; /* Part Virt Bitmap */ | |
2162 | } | |
e2ebc74d JB |
2163 | } |
2164 | ||
eddcbb94 JB |
2165 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, |
2166 | struct ieee80211_vif *vif, | |
2167 | u16 *tim_offset, u16 *tim_length) | |
e2ebc74d JB |
2168 | { |
2169 | struct ieee80211_local *local = hw_to_local(hw); | |
9d139c81 | 2170 | struct sk_buff *skb = NULL; |
e039fa4a | 2171 | struct ieee80211_tx_info *info; |
e2ebc74d JB |
2172 | struct ieee80211_sub_if_data *sdata = NULL; |
2173 | struct ieee80211_if_ap *ap = NULL; | |
5dfdaf58 | 2174 | struct beacon_data *beacon; |
8318d78a | 2175 | struct ieee80211_supported_band *sband; |
2e92e6f2 | 2176 | enum ieee80211_band band = local->hw.conf.channel->band; |
e00cfce0 | 2177 | struct ieee80211_tx_rate_control txrc; |
8318d78a | 2178 | |
2e92e6f2 | 2179 | sband = local->hw.wiphy->bands[band]; |
5dfdaf58 JB |
2180 | |
2181 | rcu_read_lock(); | |
e2ebc74d | 2182 | |
32bfd35d | 2183 | sdata = vif_to_sdata(vif); |
e2ebc74d | 2184 | |
eb3e554b FF |
2185 | if (!ieee80211_sdata_running(sdata)) |
2186 | goto out; | |
2187 | ||
eddcbb94 JB |
2188 | if (tim_offset) |
2189 | *tim_offset = 0; | |
2190 | if (tim_length) | |
2191 | *tim_length = 0; | |
2192 | ||
05c914fe | 2193 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
33b64eb2 LCC |
2194 | ap = &sdata->u.ap; |
2195 | beacon = rcu_dereference(ap->beacon); | |
3ad97fbc | 2196 | if (beacon) { |
902acc78 JB |
2197 | /* |
2198 | * headroom, head length, | |
2199 | * tail length and maximum TIM length | |
2200 | */ | |
2201 | skb = dev_alloc_skb(local->tx_headroom + | |
2202 | beacon->head_len + | |
2203 | beacon->tail_len + 256); | |
2204 | if (!skb) | |
2205 | goto out; | |
33b64eb2 | 2206 | |
902acc78 JB |
2207 | skb_reserve(skb, local->tx_headroom); |
2208 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
2209 | beacon->head_len); | |
33b64eb2 | 2210 | |
d0709a65 JB |
2211 | /* |
2212 | * Not very nice, but we want to allow the driver to call | |
2213 | * ieee80211_beacon_get() as a response to the set_tim() | |
2214 | * callback. That, however, is already invoked under the | |
2215 | * sta_lock to guarantee consistent and race-free update | |
2216 | * of the tim bitmap in mac80211 and the driver. | |
2217 | */ | |
2218 | if (local->tim_in_locked_section) { | |
8e7be8da | 2219 | ieee80211_beacon_add_tim(ap, skb, beacon); |
d0709a65 JB |
2220 | } else { |
2221 | unsigned long flags; | |
2222 | ||
2223 | spin_lock_irqsave(&local->sta_lock, flags); | |
8e7be8da | 2224 | ieee80211_beacon_add_tim(ap, skb, beacon); |
d0709a65 JB |
2225 | spin_unlock_irqrestore(&local->sta_lock, flags); |
2226 | } | |
33b64eb2 | 2227 | |
eddcbb94 JB |
2228 | if (tim_offset) |
2229 | *tim_offset = beacon->head_len; | |
2230 | if (tim_length) | |
2231 | *tim_length = skb->len - beacon->head_len; | |
2232 | ||
902acc78 JB |
2233 | if (beacon->tail) |
2234 | memcpy(skb_put(skb, beacon->tail_len), | |
2235 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
2236 | } else |
2237 | goto out; | |
05c914fe | 2238 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 2239 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 2240 | struct ieee80211_hdr *hdr; |
af8cdcd8 | 2241 | struct sk_buff *presp = rcu_dereference(ifibss->presp); |
33b64eb2 | 2242 | |
af8cdcd8 | 2243 | if (!presp) |
9d139c81 JB |
2244 | goto out; |
2245 | ||
af8cdcd8 | 2246 | skb = skb_copy(presp, GFP_ATOMIC); |
9d139c81 JB |
2247 | if (!skb) |
2248 | goto out; | |
2249 | ||
2250 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
2251 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2252 | IEEE80211_STYPE_BEACON); | |
902acc78 | 2253 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
472dbc45 JB |
2254 | struct ieee80211_mgmt *mgmt; |
2255 | u8 *pos; | |
2256 | ||
ac1bd846 JB |
2257 | #ifdef CONFIG_MAC80211_MESH |
2258 | if (!sdata->u.mesh.mesh_id_len) | |
2259 | goto out; | |
2260 | #endif | |
2261 | ||
902acc78 | 2262 | /* headroom, head length, tail length and maximum TIM length */ |
c80d545d | 2263 | skb = dev_alloc_skb(local->tx_headroom + 400 + |
581a8b0f | 2264 | sdata->u.mesh.ie_len); |
902acc78 JB |
2265 | if (!skb) |
2266 | goto out; | |
2267 | ||
2268 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2269 | mgmt = (struct ieee80211_mgmt *) | |
2270 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
2271 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
065e9605 HH |
2272 | mgmt->frame_control = |
2273 | cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON); | |
902acc78 | 2274 | memset(mgmt->da, 0xff, ETH_ALEN); |
47846c9b JB |
2275 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
2276 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
902acc78 | 2277 | mgmt->u.beacon.beacon_int = |
57c4d7b4 | 2278 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); |
902acc78 JB |
2279 | mgmt->u.beacon.capab_info = 0x0; /* 0x0 for MPs */ |
2280 | ||
2281 | pos = skb_put(skb, 2); | |
2282 | *pos++ = WLAN_EID_SSID; | |
2283 | *pos++ = 0x0; | |
2284 | ||
f698d856 | 2285 | mesh_mgmt_ies_add(skb, sdata); |
9d139c81 JB |
2286 | } else { |
2287 | WARN_ON(1); | |
5dfdaf58 | 2288 | goto out; |
e2ebc74d JB |
2289 | } |
2290 | ||
e039fa4a JB |
2291 | info = IEEE80211_SKB_CB(skb); |
2292 | ||
3b8d81e0 | 2293 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 2294 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 2295 | info->band = band; |
e00cfce0 JM |
2296 | |
2297 | memset(&txrc, 0, sizeof(txrc)); | |
2298 | txrc.hw = hw; | |
2299 | txrc.sband = sband; | |
2300 | txrc.bss_conf = &sdata->vif.bss_conf; | |
2301 | txrc.skb = skb; | |
2302 | txrc.reported_rate.idx = -1; | |
37eb0b16 JM |
2303 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
2304 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) | |
2305 | txrc.max_rate_idx = -1; | |
2306 | else | |
2307 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
8f0729b1 | 2308 | txrc.bss = true; |
e00cfce0 | 2309 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
2310 | |
2311 | info->control.vif = vif; | |
f591fa5d | 2312 | |
a472e71b JL |
2313 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
2314 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
2315 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 2316 | out: |
5dfdaf58 | 2317 | rcu_read_unlock(); |
e2ebc74d JB |
2318 | return skb; |
2319 | } | |
eddcbb94 | 2320 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 2321 | |
7044cc56 KV |
2322 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
2323 | struct ieee80211_vif *vif) | |
2324 | { | |
2325 | struct ieee80211_sub_if_data *sdata; | |
2326 | struct ieee80211_if_managed *ifmgd; | |
2327 | struct ieee80211_pspoll *pspoll; | |
2328 | struct ieee80211_local *local; | |
2329 | struct sk_buff *skb; | |
2330 | ||
2331 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2332 | return NULL; | |
2333 | ||
2334 | sdata = vif_to_sdata(vif); | |
2335 | ifmgd = &sdata->u.mgd; | |
2336 | local = sdata->local; | |
2337 | ||
2338 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
2339 | if (!skb) { | |
2340 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
2341 | "pspoll template\n", sdata->name); | |
2342 | return NULL; | |
2343 | } | |
2344 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2345 | ||
2346 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
2347 | memset(pspoll, 0, sizeof(*pspoll)); | |
2348 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
2349 | IEEE80211_STYPE_PSPOLL); | |
2350 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
2351 | ||
2352 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
2353 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
2354 | ||
2355 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
2356 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
2357 | ||
2358 | return skb; | |
2359 | } | |
2360 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
2361 | ||
2362 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
2363 | struct ieee80211_vif *vif) | |
2364 | { | |
2365 | struct ieee80211_hdr_3addr *nullfunc; | |
2366 | struct ieee80211_sub_if_data *sdata; | |
2367 | struct ieee80211_if_managed *ifmgd; | |
2368 | struct ieee80211_local *local; | |
2369 | struct sk_buff *skb; | |
2370 | ||
2371 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2372 | return NULL; | |
2373 | ||
2374 | sdata = vif_to_sdata(vif); | |
2375 | ifmgd = &sdata->u.mgd; | |
2376 | local = sdata->local; | |
2377 | ||
2378 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
2379 | if (!skb) { | |
2380 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
2381 | "template\n", sdata->name); | |
2382 | return NULL; | |
2383 | } | |
2384 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2385 | ||
2386 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
2387 | sizeof(*nullfunc)); | |
2388 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
2389 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
2390 | IEEE80211_STYPE_NULLFUNC | | |
2391 | IEEE80211_FCTL_TODS); | |
2392 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
2393 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
2394 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
2395 | ||
2396 | return skb; | |
2397 | } | |
2398 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
2399 | ||
05e54ea6 KV |
2400 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
2401 | struct ieee80211_vif *vif, | |
2402 | const u8 *ssid, size_t ssid_len, | |
2403 | const u8 *ie, size_t ie_len) | |
2404 | { | |
2405 | struct ieee80211_sub_if_data *sdata; | |
2406 | struct ieee80211_local *local; | |
2407 | struct ieee80211_hdr_3addr *hdr; | |
2408 | struct sk_buff *skb; | |
2409 | size_t ie_ssid_len; | |
2410 | u8 *pos; | |
2411 | ||
2412 | sdata = vif_to_sdata(vif); | |
2413 | local = sdata->local; | |
2414 | ie_ssid_len = 2 + ssid_len; | |
2415 | ||
2416 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
2417 | ie_ssid_len + ie_len); | |
2418 | if (!skb) { | |
2419 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
2420 | "request template\n", sdata->name); | |
2421 | return NULL; | |
2422 | } | |
2423 | ||
2424 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2425 | ||
2426 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
2427 | memset(hdr, 0, sizeof(*hdr)); | |
2428 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
2429 | IEEE80211_STYPE_PROBE_REQ); | |
2430 | memset(hdr->addr1, 0xff, ETH_ALEN); | |
2431 | memcpy(hdr->addr2, vif->addr, ETH_ALEN); | |
2432 | memset(hdr->addr3, 0xff, ETH_ALEN); | |
2433 | ||
2434 | pos = skb_put(skb, ie_ssid_len); | |
2435 | *pos++ = WLAN_EID_SSID; | |
2436 | *pos++ = ssid_len; | |
2437 | if (ssid) | |
2438 | memcpy(pos, ssid, ssid_len); | |
2439 | pos += ssid_len; | |
2440 | ||
2441 | if (ie) { | |
2442 | pos = skb_put(skb, ie_len); | |
2443 | memcpy(pos, ie, ie_len); | |
2444 | } | |
2445 | ||
2446 | return skb; | |
2447 | } | |
2448 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
2449 | ||
32bfd35d | 2450 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2451 | const void *frame, size_t frame_len, |
e039fa4a | 2452 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2453 | struct ieee80211_rts *rts) |
2454 | { | |
2455 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2456 | |
065e9605 HH |
2457 | rts->frame_control = |
2458 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
2459 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
2460 | frame_txctl); | |
e2ebc74d JB |
2461 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
2462 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
2463 | } | |
2464 | EXPORT_SYMBOL(ieee80211_rts_get); | |
2465 | ||
32bfd35d | 2466 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2467 | const void *frame, size_t frame_len, |
e039fa4a | 2468 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2469 | struct ieee80211_cts *cts) |
2470 | { | |
2471 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2472 | |
065e9605 HH |
2473 | cts->frame_control = |
2474 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
2475 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
2476 | frame_len, frame_txctl); | |
e2ebc74d JB |
2477 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
2478 | } | |
2479 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
2480 | ||
2481 | struct sk_buff * | |
32bfd35d | 2482 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 2483 | struct ieee80211_vif *vif) |
e2ebc74d JB |
2484 | { |
2485 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 2486 | struct sk_buff *skb = NULL; |
5cf121c3 | 2487 | struct ieee80211_tx_data tx; |
e2ebc74d JB |
2488 | struct ieee80211_sub_if_data *sdata; |
2489 | struct ieee80211_if_ap *bss = NULL; | |
5dfdaf58 | 2490 | struct beacon_data *beacon; |
e039fa4a | 2491 | struct ieee80211_tx_info *info; |
e2ebc74d | 2492 | |
32bfd35d | 2493 | sdata = vif_to_sdata(vif); |
747cf5e9 | 2494 | bss = &sdata->u.ap; |
5dfdaf58 | 2495 | |
5dfdaf58 JB |
2496 | rcu_read_lock(); |
2497 | beacon = rcu_dereference(bss->beacon); | |
2498 | ||
05c914fe | 2499 | if (sdata->vif.type != NL80211_IFTYPE_AP || !beacon || !beacon->head) |
747cf5e9 | 2500 | goto out; |
5dfdaf58 | 2501 | |
512119b3 | 2502 | if (bss->dtim_count != 0 || !bss->dtim_bc_mc) |
747cf5e9 | 2503 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 2504 | |
e2ebc74d JB |
2505 | while (1) { |
2506 | skb = skb_dequeue(&bss->ps_bc_buf); | |
2507 | if (!skb) | |
747cf5e9 | 2508 | goto out; |
e2ebc74d JB |
2509 | local->total_ps_buffered--; |
2510 | ||
2511 | if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) { | |
2512 | struct ieee80211_hdr *hdr = | |
2513 | (struct ieee80211_hdr *) skb->data; | |
2514 | /* more buffered multicast/broadcast frames ==> set | |
2515 | * MoreData flag in IEEE 802.11 header to inform PS | |
2516 | * STAs */ | |
2517 | hdr->frame_control |= | |
2518 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
2519 | } | |
2520 | ||
3b8d81e0 | 2521 | if (!ieee80211_tx_prepare(sdata, &tx, skb)) |
e2ebc74d JB |
2522 | break; |
2523 | dev_kfree_skb_any(skb); | |
2524 | } | |
e039fa4a JB |
2525 | |
2526 | info = IEEE80211_SKB_CB(skb); | |
2527 | ||
5cf121c3 JB |
2528 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
2529 | tx.channel = local->hw.conf.channel; | |
e039fa4a | 2530 | info->band = tx.channel->band; |
e2ebc74d | 2531 | |
97b045d6 | 2532 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 2533 | skb = NULL; |
97b045d6 | 2534 | out: |
d0709a65 | 2535 | rcu_read_unlock(); |
e2ebc74d JB |
2536 | |
2537 | return skb; | |
2538 | } | |
2539 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 2540 | |
62ae67be | 2541 | void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
3b8d81e0 | 2542 | { |
3b8d81e0 JB |
2543 | skb_set_mac_header(skb, 0); |
2544 | skb_set_network_header(skb, 0); | |
2545 | skb_set_transport_header(skb, 0); | |
2546 | ||
4c468fe5 AN |
2547 | /* Send all internal mgmt frames on VO. Accordingly set TID to 7. */ |
2548 | skb_set_queue_mapping(skb, IEEE80211_AC_VO); | |
2549 | skb->priority = 7; | |
cf0277e7 | 2550 | |
3d34deb6 JB |
2551 | /* |
2552 | * The other path calling ieee80211_xmit is from the tasklet, | |
2553 | * and while we can handle concurrent transmissions locking | |
2554 | * requirements are that we do not come into tx with bhs on. | |
2555 | */ | |
2556 | local_bh_disable(); | |
3b8d81e0 | 2557 | ieee80211_xmit(sdata, skb); |
3d34deb6 | 2558 | local_bh_enable(); |
3b8d81e0 | 2559 | } |