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[PATCH] net/mac80211/wme.c: fix sparse warning
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / mac80211 / ieee80211.c
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f0706e82
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 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <net/mac80211.h>
12#include <net/ieee80211_radiotap.h>
13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/netdevice.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/etherdevice.h>
20#include <linux/if_arp.h>
21#include <linux/wireless.h>
22#include <linux/rtnetlink.h>
23#include <net/iw_handler.h>
24#include <linux/compiler.h>
25#include <linux/bitmap.h>
26#include <net/cfg80211.h>
e4c967c6 27#include <asm/unaligned.h>
f0706e82
JB		 28
29#include "ieee80211_common.h"
30#include "ieee80211_i.h"
31#include "ieee80211_rate.h"
32#include "wep.h"
33#include "wpa.h"
34#include "tkip.h"
35#include "wme.h"
36#include "aes_ccm.h"
37#include "ieee80211_led.h"
38#include "ieee80211_cfg.h"
e9f207f0
JB		 39#include "debugfs.h"
40#include "debugfs_netdev.h"
41#include "debugfs_key.h"
f0706e82
JB		 42
43/* privid for wiphys to determine whether they belong to us or not */
44void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
45
46/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
47/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
48static const unsigned char rfc1042_header[] =
49 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
50
51/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
52static const unsigned char bridge_tunnel_header[] =
53 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
54
55/* No encapsulation header if EtherType < 0x600 (=length) */
56static const unsigned char eapol_header[] =
57 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00, 0x88, 0x8e };
58
59
b306f453
JB		 60/*
61 * For seeing transmitted packets on monitor interfaces
62 * we have a radiotap header too.
63 */
64struct ieee80211_tx_status_rtap_hdr {
65 struct ieee80211_radiotap_header hdr;
66 __le16 tx_flags;
67 u8 data_retries;
68} __attribute__ ((packed));
69
70
f0706e82
JB		 71static inline void ieee80211_include_sequence(struct ieee80211_sub_if_data *sdata,
72 struct ieee80211_hdr *hdr)
73{
74 /* Set the sequence number for this frame. */
75 hdr->seq_ctrl = cpu_to_le16(sdata->sequence);
76
77 /* Increase the sequence number. */
78 sdata->sequence = (sdata->sequence + 0x10) & IEEE80211_SCTL_SEQ;
79}
80
81struct ieee80211_key_conf *
82ieee80211_key_data2conf(struct ieee80211_local *local,
83 const struct ieee80211_key *data)
84{
85 struct ieee80211_key_conf *conf;
86
87 conf = kmalloc(sizeof(*conf) + data->keylen, GFP_ATOMIC);
88 if (!conf)
89 return NULL;
90
91 conf->hw_key_idx = data->hw_key_idx;
92 conf->alg = data->alg;
93 conf->keylen = data->keylen;
94 conf->flags = 0;
95 if (data->force_sw_encrypt)
96 conf->flags |= IEEE80211_KEY_FORCE_SW_ENCRYPT;
97 conf->keyidx = data->keyidx;
98 if (data->default_tx_key)
99 conf->flags |= IEEE80211_KEY_DEFAULT_TX_KEY;
100 if (local->default_wep_only)
101 conf->flags |= IEEE80211_KEY_DEFAULT_WEP_ONLY;
102 memcpy(conf->key, data->key, data->keylen);
103
104 return conf;
105}
106
107struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata,
108 int idx, size_t key_len, gfp_t flags)
109{
110 struct ieee80211_key *key;
111
112 key = kzalloc(sizeof(struct ieee80211_key) + key_len, flags);
113 if (!key)
114 return NULL;
115 kref_init(&key->kref);
116 return key;
117}
118
119static void ieee80211_key_release(struct kref *kref)
120{
121 struct ieee80211_key *key;
122
123 key = container_of(kref, struct ieee80211_key, kref);
124 if (key->alg == ALG_CCMP)
125 ieee80211_aes_key_free(key->u.ccmp.tfm);
e9f207f0 126 ieee80211_debugfs_key_remove(key);
f0706e82
JB		 127 kfree(key);
128}
129
130void ieee80211_key_free(struct ieee80211_key *key)
131{
132 if (key)
133 kref_put(&key->kref, ieee80211_key_release);
134}
135
136static int rate_list_match(const int *rate_list, int rate)
137{
138 int i;
139
140 if (!rate_list)
141 return 0;
142
143 for (i = 0; rate_list[i] >= 0; i++)
144 if (rate_list[i] == rate)
145 return 1;
146
147 return 0;
148}
149
150
151void ieee80211_prepare_rates(struct ieee80211_local *local,
152 struct ieee80211_hw_mode *mode)
153{
154 int i;
155
156 for (i = 0; i < mode->num_rates; i++) {
157 struct ieee80211_rate *rate = &mode->rates[i];
158
159 rate->flags &= ~(IEEE80211_RATE_SUPPORTED |
160 IEEE80211_RATE_BASIC);
161
162 if (local->supp_rates[mode->mode]) {
163 if (!rate_list_match(local->supp_rates[mode->mode],
164 rate->rate))
165 continue;
166 }
167
168 rate->flags |= IEEE80211_RATE_SUPPORTED;
169
170 /* Use configured basic rate set if it is available. If not,
171 * use defaults that are sane for most cases. */
172 if (local->basic_rates[mode->mode]) {
173 if (rate_list_match(local->basic_rates[mode->mode],
174 rate->rate))
175 rate->flags |= IEEE80211_RATE_BASIC;
176 } else switch (mode->mode) {
177 case MODE_IEEE80211A:
178 if (rate->rate == 60 || rate->rate == 120 ||
179 rate->rate == 240)
180 rate->flags |= IEEE80211_RATE_BASIC;
181 break;
182 case MODE_IEEE80211B:
183 if (rate->rate == 10 || rate->rate == 20)
184 rate->flags |= IEEE80211_RATE_BASIC;
185 break;
186 case MODE_ATHEROS_TURBO:
187 if (rate->rate == 120 || rate->rate == 240 ||
188 rate->rate == 480)
189 rate->flags |= IEEE80211_RATE_BASIC;
190 break;
191 case MODE_IEEE80211G:
192 if (rate->rate == 10 || rate->rate == 20 ||
193 rate->rate == 55 || rate->rate == 110)
194 rate->flags |= IEEE80211_RATE_BASIC;
195 break;
196 }
197
198 /* Set ERP and MANDATORY flags based on phymode */
199 switch (mode->mode) {
200 case MODE_IEEE80211A:
201 if (rate->rate == 60 || rate->rate == 120 ||
202 rate->rate == 240)
203 rate->flags |= IEEE80211_RATE_MANDATORY;
204 break;
205 case MODE_IEEE80211B:
206 if (rate->rate == 10)
207 rate->flags |= IEEE80211_RATE_MANDATORY;
208 break;
209 case MODE_ATHEROS_TURBO:
210 break;
211 case MODE_IEEE80211G:
212 if (rate->rate == 10 || rate->rate == 20 ||
213 rate->rate == 55 || rate->rate == 110 ||
214 rate->rate == 60 || rate->rate == 120 ||
215 rate->rate == 240)
216 rate->flags |= IEEE80211_RATE_MANDATORY;
217 break;
218 }
219 if (ieee80211_is_erp_rate(mode->mode, rate->rate))
220 rate->flags |= IEEE80211_RATE_ERP;
221 }
222}
223
224
225static void ieee80211_key_threshold_notify(struct net_device *dev,
226 struct ieee80211_key *key,
227 struct sta_info *sta)
228{
229 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
230 struct sk_buff *skb;
231 struct ieee80211_msg_key_notification *msg;
232
233 /* if no one will get it anyway, don't even allocate it.
234 * unlikely because this is only relevant for APs
235 * where the device must be open... */
236 if (unlikely(!local->apdev))
237 return;
238
239 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
240 sizeof(struct ieee80211_msg_key_notification));
241 if (!skb)
242 return;
243
244 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
245 msg = (struct ieee80211_msg_key_notification *)
246 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
247 msg->tx_rx_count = key->tx_rx_count;
248 memcpy(msg->ifname, dev->name, IFNAMSIZ);
249 if (sta)
250 memcpy(msg->addr, sta->addr, ETH_ALEN);
251 else
252 memset(msg->addr, 0xff, ETH_ALEN);
253
254 key->tx_rx_count = 0;
255
256 ieee80211_rx_mgmt(local, skb, NULL,
257 ieee80211_msg_key_threshold_notification);
258}
259
260
261static u8 * ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len)
262{
263 u16 fc;
264
265 if (len < 24)
266 return NULL;
267
268 fc = le16_to_cpu(hdr->frame_control);
269
270 switch (fc & IEEE80211_FCTL_FTYPE) {
271 case IEEE80211_FTYPE_DATA:
272 switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
273 case IEEE80211_FCTL_TODS:
274 return hdr->addr1;
275 case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
276 return NULL;
277 case IEEE80211_FCTL_FROMDS:
278 return hdr->addr2;
279 case 0:
280 return hdr->addr3;
281 }
282 break;
283 case IEEE80211_FTYPE_MGMT:
284 return hdr->addr3;
285 case IEEE80211_FTYPE_CTL:
286 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)
287 return hdr->addr1;
288 else
289 return NULL;
290 }
291
292 return NULL;
293}
294
295int ieee80211_get_hdrlen(u16 fc)
296{
297 int hdrlen = 24;
298
299 switch (fc & IEEE80211_FCTL_FTYPE) {
300 case IEEE80211_FTYPE_DATA:
301 if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
302 hdrlen = 30; /* Addr4 */
303 /*
304 * The QoS Control field is two bytes and its presence is
305 * indicated by the IEEE80211_STYPE_QOS_DATA bit. Add 2 to
306 * hdrlen if that bit is set.
307 * This works by masking out the bit and shifting it to
308 * bit position 1 so the result has the value 0 or 2.
309 */
310 hdrlen += (fc & IEEE80211_STYPE_QOS_DATA)
311 >> (ilog2(IEEE80211_STYPE_QOS_DATA)-1);
312 break;
313 case IEEE80211_FTYPE_CTL:
314 /*
315 * ACK and CTS are 10 bytes, all others 16. To see how
316 * to get this condition consider
317 * subtype mask: 0b0000000011110000 (0x00F0)
318 * ACK subtype: 0b0000000011010000 (0x00D0)
319 * CTS subtype: 0b0000000011000000 (0x00C0)
320 * bits that matter: ^^^ (0x00E0)
321 * value of those: 0b0000000011000000 (0x00C0)
322 */
323 if ((fc & 0xE0) == 0xC0)
324 hdrlen = 10;
325 else
326 hdrlen = 16;
327 break;
328 }
329
330 return hdrlen;
331}
332EXPORT_SYMBOL(ieee80211_get_hdrlen);
333
334int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
335{
336 const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *) skb->data;
337 int hdrlen;
338
339 if (unlikely(skb->len < 10))
340 return 0;
341 hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control));
342 if (unlikely(hdrlen > skb->len))
343 return 0;
344 return hdrlen;
345}
346EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
347
348static int ieee80211_get_radiotap_len(struct sk_buff *skb)
349{
350 struct ieee80211_radiotap_header *hdr =
351 (struct ieee80211_radiotap_header *) skb->data;
352
353 return le16_to_cpu(hdr->it_len);
354}
355
356#ifdef CONFIG_MAC80211_LOWTX_FRAME_DUMP
357static void ieee80211_dump_frame(const char *ifname, const char *title,
358 const struct sk_buff *skb)
359{
360 const struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
361 u16 fc;
362 int hdrlen;
363
364 printk(KERN_DEBUG "%s: %s (len=%d)", ifname, title, skb->len);
365 if (skb->len < 4) {
366 printk("\n");
367 return;
368 }
369
370 fc = le16_to_cpu(hdr->frame_control);
371 hdrlen = ieee80211_get_hdrlen(fc);
372 if (hdrlen > skb->len)
373 hdrlen = skb->len;
374 if (hdrlen >= 4)
375 printk(" FC=0x%04x DUR=0x%04x",
376 fc, le16_to_cpu(hdr->duration_id));
377 if (hdrlen >= 10)
378 printk(" A1=" MAC_FMT, MAC_ARG(hdr->addr1));
379 if (hdrlen >= 16)
380 printk(" A2=" MAC_FMT, MAC_ARG(hdr->addr2));
381 if (hdrlen >= 24)
382 printk(" A3=" MAC_FMT, MAC_ARG(hdr->addr3));
383 if (hdrlen >= 30)
384 printk(" A4=" MAC_FMT, MAC_ARG(hdr->addr4));
385 printk("\n");
386}
387#else /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */
388static inline void ieee80211_dump_frame(const char *ifname, const char *title,
389 struct sk_buff *skb)
390{
391}
392#endif /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */
393
394
395static int ieee80211_is_eapol(const struct sk_buff *skb)
396{
397 const struct ieee80211_hdr *hdr;
398 u16 fc;
399 int hdrlen;
400
401 if (unlikely(skb->len < 10))
402 return 0;
403
404 hdr = (const struct ieee80211_hdr *) skb->data;
405 fc = le16_to_cpu(hdr->frame_control);
406
407 if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
408 return 0;
409
410 hdrlen = ieee80211_get_hdrlen(fc);
411
412 if (unlikely(skb->len >= hdrlen + sizeof(eapol_header) &&
413 memcmp(skb->data + hdrlen, eapol_header,
414 sizeof(eapol_header)) == 0))
415 return 1;
416
417 return 0;
418}
419
420
421static ieee80211_txrx_result
422ieee80211_tx_h_rate_ctrl(struct ieee80211_txrx_data *tx)
423{
424 struct rate_control_extra extra;
425
426 memset(&extra, 0, sizeof(extra));
427 extra.mode = tx->u.tx.mode;
428 extra.mgmt_data = tx->sdata &&
429 tx->sdata->type == IEEE80211_IF_TYPE_MGMT;
430 extra.ethertype = tx->ethertype;
431
432 tx->u.tx.rate = rate_control_get_rate(tx->local, tx->dev, tx->skb,
433 &extra);
434 if (unlikely(extra.probe != NULL)) {
435 tx->u.tx.control->flags |= IEEE80211_TXCTL_RATE_CTRL_PROBE;
436 tx->u.tx.probe_last_frag = 1;
437 tx->u.tx.control->alt_retry_rate = tx->u.tx.rate->val;
438 tx->u.tx.rate = extra.probe;
439 } else {
440 tx->u.tx.control->alt_retry_rate = -1;
441 }
442 if (!tx->u.tx.rate)
443 return TXRX_DROP;
444 if (tx->u.tx.mode->mode == MODE_IEEE80211G &&
63fc33ce 445 tx->sdata->use_protection && tx->fragmented &&
f0706e82
JB		 446 extra.nonerp) {
447 tx->u.tx.last_frag_rate = tx->u.tx.rate;
448 tx->u.tx.probe_last_frag = extra.probe ? 1 : 0;
449
450 tx->u.tx.rate = extra.nonerp;
451 tx->u.tx.control->rate = extra.nonerp;
452 tx->u.tx.control->flags &= ~IEEE80211_TXCTL_RATE_CTRL_PROBE;
453 } else {
454 tx->u.tx.last_frag_rate = tx->u.tx.rate;
455 tx->u.tx.control->rate = tx->u.tx.rate;
456 }
457 tx->u.tx.control->tx_rate = tx->u.tx.rate->val;
458 if ((tx->u.tx.rate->flags & IEEE80211_RATE_PREAMBLE2) &&
459 tx->local->short_preamble &&
460 (!tx->sta || (tx->sta->flags & WLAN_STA_SHORT_PREAMBLE))) {
461 tx->u.tx.short_preamble = 1;
462 tx->u.tx.control->tx_rate = tx->u.tx.rate->val2;
463 }
464
465 return TXRX_CONTINUE;
466}
467
468
469static ieee80211_txrx_result
470ieee80211_tx_h_select_key(struct ieee80211_txrx_data *tx)
471{
472 if (tx->sta)
473 tx->u.tx.control->key_idx = tx->sta->key_idx_compression;
474 else
475 tx->u.tx.control->key_idx = HW_KEY_IDX_INVALID;
476
477 if (unlikely(tx->u.tx.control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
478 tx->key = NULL;
479 else if (tx->sta && tx->sta->key)
480 tx->key = tx->sta->key;
481 else if (tx->sdata->default_key)
482 tx->key = tx->sdata->default_key;
483 else if (tx->sdata->drop_unencrypted &&
484 !(tx->sdata->eapol && ieee80211_is_eapol(tx->skb))) {
485 I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted);
486 return TXRX_DROP;
487 } else
488 tx->key = NULL;
489
490 if (tx->key) {
491 tx->key->tx_rx_count++;
492 if (unlikely(tx->local->key_tx_rx_threshold &&
493 tx->key->tx_rx_count >
494 tx->local->key_tx_rx_threshold)) {
495 ieee80211_key_threshold_notify(tx->dev, tx->key,
496 tx->sta);
497 }
498 }
499
500 return TXRX_CONTINUE;
501}
502
503
504static ieee80211_txrx_result
505ieee80211_tx_h_fragment(struct ieee80211_txrx_data *tx)
506{
507 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
508 size_t hdrlen, per_fragm, num_fragm, payload_len, left;
509 struct sk_buff **frags, *first, *frag;
510 int i;
511 u16 seq;
512 u8 *pos;
513 int frag_threshold = tx->local->fragmentation_threshold;
514
515 if (!tx->fragmented)
516 return TXRX_CONTINUE;
517
518 first = tx->skb;
519
520 hdrlen = ieee80211_get_hdrlen(tx->fc);
521 payload_len = first->len - hdrlen;
522 per_fragm = frag_threshold - hdrlen - FCS_LEN;
523 num_fragm = (payload_len + per_fragm - 1) / per_fragm;
524
525 frags = kzalloc(num_fragm * sizeof(struct sk_buff *), GFP_ATOMIC);
526 if (!frags)
527 goto fail;
528
529 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
530 seq = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ;
531 pos = first->data + hdrlen + per_fragm;
532 left = payload_len - per_fragm;
533 for (i = 0; i < num_fragm - 1; i++) {
534 struct ieee80211_hdr *fhdr;
535 size_t copylen;
536
537 if (left <= 0)
538 goto fail;
539
540 /* reserve enough extra head and tail room for possible
541 * encryption */
542 frag = frags[i] =
b306f453 543 dev_alloc_skb(tx->local->tx_headroom +
f0706e82
JB		 544 frag_threshold +
545 IEEE80211_ENCRYPT_HEADROOM +
546 IEEE80211_ENCRYPT_TAILROOM);
547 if (!frag)
548 goto fail;
549 /* Make sure that all fragments use the same priority so
550 * that they end up using the same TX queue */
551 frag->priority = first->priority;
b306f453
JB		 552 skb_reserve(frag, tx->local->tx_headroom +
553 IEEE80211_ENCRYPT_HEADROOM);
f0706e82
JB		 554 fhdr = (struct ieee80211_hdr *) skb_put(frag, hdrlen);
555 memcpy(fhdr, first->data, hdrlen);
556 if (i == num_fragm - 2)
557 fhdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREFRAGS);
558 fhdr->seq_ctrl = cpu_to_le16(seq | ((i + 1) & IEEE80211_SCTL_FRAG));
559 copylen = left > per_fragm ? per_fragm : left;
560 memcpy(skb_put(frag, copylen), pos, copylen);
561
562 pos += copylen;
563 left -= copylen;
564 }
565 skb_trim(first, hdrlen + per_fragm);
566
567 tx->u.tx.num_extra_frag = num_fragm - 1;
568 tx->u.tx.extra_frag = frags;
569
570 return TXRX_CONTINUE;
571
572 fail:
573 printk(KERN_DEBUG "%s: failed to fragment frame\n", tx->dev->name);
574 if (frags) {
575 for (i = 0; i < num_fragm - 1; i++)
576 if (frags[i])
577 dev_kfree_skb(frags[i]);
578 kfree(frags);
579 }
580 I802_DEBUG_INC(tx->local->tx_handlers_drop_fragment);
581 return TXRX_DROP;
582}
583
584
585static int wep_encrypt_skb(struct ieee80211_txrx_data *tx, struct sk_buff *skb)
586{
587 if (tx->key->force_sw_encrypt) {
588 if (ieee80211_wep_encrypt(tx->local, skb, tx->key))
589 return -1;
590 } else {
591 tx->u.tx.control->key_idx = tx->key->hw_key_idx;
592 if (tx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) {
593 if (ieee80211_wep_add_iv(tx->local, skb, tx->key) ==
594 NULL)
595 return -1;
596 }
597 }
598 return 0;
599}
600
601
602void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx)
603{
604 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
605
606 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
607 if (tx->u.tx.extra_frag) {
608 struct ieee80211_hdr *fhdr;
609 int i;
610 for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
611 fhdr = (struct ieee80211_hdr *)
612 tx->u.tx.extra_frag[i]->data;
613 fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
614 }
615 }
616}
617
618
619static ieee80211_txrx_result
620ieee80211_tx_h_wep_encrypt(struct ieee80211_txrx_data *tx)
621{
622 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
623 u16 fc;
624
625 fc = le16_to_cpu(hdr->frame_control);
626
627 if (!tx->key || tx->key->alg != ALG_WEP ||
628 ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
629 ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
630 (fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)))
631 return TXRX_CONTINUE;
632
633 tx->u.tx.control->iv_len = WEP_IV_LEN;
634 tx->u.tx.control->icv_len = WEP_ICV_LEN;
635 ieee80211_tx_set_iswep(tx);
636
637 if (wep_encrypt_skb(tx, tx->skb) < 0) {
638 I802_DEBUG_INC(tx->local->tx_handlers_drop_wep);
639 return TXRX_DROP;
640 }
641
642 if (tx->u.tx.extra_frag) {
643 int i;
644 for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
645 if (wep_encrypt_skb(tx, tx->u.tx.extra_frag[i]) < 0) {
646 I802_DEBUG_INC(tx->local->
647 tx_handlers_drop_wep);
648 return TXRX_DROP;
649 }
650 }
651 }
652
653 return TXRX_CONTINUE;
654}
655
656
657static int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
658 int rate, int erp, int short_preamble)
659{
660 int dur;
661
662 /* calculate duration (in microseconds, rounded up to next higher
663 * integer if it includes a fractional microsecond) to send frame of
664 * len bytes (does not include FCS) at the given rate. Duration will
665 * also include SIFS.
666 *
667 * rate is in 100 kbps, so divident is multiplied by 10 in the
668 * DIV_ROUND_UP() operations.
669 */
670
671 if (local->hw.conf.phymode == MODE_IEEE80211A || erp ||
672 local->hw.conf.phymode == MODE_ATHEROS_TURBO) {
673 /*
674 * OFDM:
675 *
676 * N_DBPS = DATARATE x 4
677 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
678 * (16 = SIGNAL time, 6 = tail bits)
679 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
680 *
681 * T_SYM = 4 usec
682 * 802.11a - 17.5.2: aSIFSTime = 16 usec
683 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
684 * signal ext = 6 usec
685 */
686 /* FIX: Atheros Turbo may have different (shorter) duration? */
687 dur = 16; /* SIFS + signal ext */
688 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
689 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
690 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
691 4 * rate); /* T_SYM x N_SYM */
692 } else {
693 /*
694 * 802.11b or 802.11g with 802.11b compatibility:
695 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
696 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
697 *
698 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
699 * aSIFSTime = 10 usec
700 * aPreambleLength = 144 usec or 72 usec with short preamble
701 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
702 */
703 dur = 10; /* aSIFSTime = 10 usec */
704 dur += short_preamble ? (72 + 24) : (144 + 48);
705
706 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
707 }
708
709 return dur;
710}
711
712
713/* Exported duration function for driver use */
714__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
715 size_t frame_len, int rate)
716{
717 struct ieee80211_local *local = hw_to_local(hw);
718 u16 dur;
719 int erp;
720
721 erp = ieee80211_is_erp_rate(hw->conf.phymode, rate);
722 dur = ieee80211_frame_duration(local, frame_len, rate,
723 erp, local->short_preamble);
724
725 return cpu_to_le16(dur);
726}
727EXPORT_SYMBOL(ieee80211_generic_frame_duration);
728
729
730static u16 ieee80211_duration(struct ieee80211_txrx_data *tx, int group_addr,
731 int next_frag_len)
732{
733 int rate, mrate, erp, dur, i;
734 struct ieee80211_rate *txrate = tx->u.tx.rate;
735 struct ieee80211_local *local = tx->local;
736 struct ieee80211_hw_mode *mode = tx->u.tx.mode;
737
738 erp = txrate->flags & IEEE80211_RATE_ERP;
739
740 /*
741 * data and mgmt (except PS Poll):
742 * - during CFP: 32768
743 * - during contention period:
744 * if addr1 is group address: 0
745 * if more fragments = 0 and addr1 is individual address: time to
746 * transmit one ACK plus SIFS
747 * if more fragments = 1 and addr1 is individual address: time to
748 * transmit next fragment plus 2 x ACK plus 3 x SIFS
749 *
750 * IEEE 802.11, 9.6:
751 * - control response frame (CTS or ACK) shall be transmitted using the
752 * same rate as the immediately previous frame in the frame exchange
753 * sequence, if this rate belongs to the PHY mandatory rates, or else
754 * at the highest possible rate belonging to the PHY rates in the
755 * BSSBasicRateSet
756 */
757
758 if ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) {
759 /* TODO: These control frames are not currently sent by
760 * 80211.o, but should they be implemented, this function
761 * needs to be updated to support duration field calculation.
762 *
763 * RTS: time needed to transmit pending data/mgmt frame plus
764 * one CTS frame plus one ACK frame plus 3 x SIFS
765 * CTS: duration of immediately previous RTS minus time
766 * required to transmit CTS and its SIFS
767 * ACK: 0 if immediately previous directed data/mgmt had
768 * more=0, with more=1 duration in ACK frame is duration
769 * from previous frame minus time needed to transmit ACK
770 * and its SIFS
771 * PS Poll: BIT(15) | BIT(14) | aid
772 */
773 return 0;
774 }
775
776 /* data/mgmt */
777 if (0 /* FIX: data/mgmt during CFP */)
778 return 32768;
779
780 if (group_addr) /* Group address as the destination - no ACK */
781 return 0;
782
783 /* Individual destination address:
784 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
785 * CTS and ACK frames shall be transmitted using the highest rate in
786 * basic rate set that is less than or equal to the rate of the
787 * immediately previous frame and that is using the same modulation
788 * (CCK or OFDM). If no basic rate set matches with these requirements,
789 * the highest mandatory rate of the PHY that is less than or equal to
790 * the rate of the previous frame is used.
791 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
792 */
793 rate = -1;
794 mrate = 10; /* use 1 Mbps if everything fails */
795 for (i = 0; i < mode->num_rates; i++) {
796 struct ieee80211_rate *r = &mode->rates[i];
797 if (r->rate > txrate->rate)
798 break;
799
800 if (IEEE80211_RATE_MODULATION(txrate->flags) !=
801 IEEE80211_RATE_MODULATION(r->flags))
802 continue;
803
804 if (r->flags & IEEE80211_RATE_BASIC)
805 rate = r->rate;
806 else if (r->flags & IEEE80211_RATE_MANDATORY)
807 mrate = r->rate;
808 }
809 if (rate == -1) {
810 /* No matching basic rate found; use highest suitable mandatory
811 * PHY rate */
812 rate = mrate;
813 }
814
815 /* Time needed to transmit ACK
816 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
817 * to closest integer */
818
819 dur = ieee80211_frame_duration(local, 10, rate, erp,
820 local->short_preamble);
821
822 if (next_frag_len) {
823 /* Frame is fragmented: duration increases with time needed to
824 * transmit next fragment plus ACK and 2 x SIFS. */
825 dur *= 2; /* ACK + SIFS */
826 /* next fragment */
827 dur += ieee80211_frame_duration(local, next_frag_len,
828 txrate->rate, erp,
829 local->short_preamble);
830 }
831
832 return dur;
833}
834
835
836static ieee80211_txrx_result
837ieee80211_tx_h_misc(struct ieee80211_txrx_data *tx)
838{
839 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
840 u16 dur;
841 struct ieee80211_tx_control *control = tx->u.tx.control;
842 struct ieee80211_hw_mode *mode = tx->u.tx.mode;
843
844 if (!is_multicast_ether_addr(hdr->addr1)) {
845 if (tx->skb->len + FCS_LEN > tx->local->rts_threshold &&
846 tx->local->rts_threshold < IEEE80211_MAX_RTS_THRESHOLD) {
847 control->flags |= IEEE80211_TXCTL_USE_RTS_CTS;
848 control->retry_limit =
849 tx->local->long_retry_limit;
850 } else {
851 control->retry_limit =
852 tx->local->short_retry_limit;
853 }
854 } else {
855 control->retry_limit = 1;
856 }
857
858 if (tx->fragmented) {
859 /* Do not use multiple retry rates when sending fragmented
860 * frames.
861 * TODO: The last fragment could still use multiple retry
862 * rates. */
863 control->alt_retry_rate = -1;
864 }
865
866 /* Use CTS protection for unicast frames sent using extended rates if
867 * there are associated non-ERP stations and RTS/CTS is not configured
868 * for the frame. */
869 if (mode->mode == MODE_IEEE80211G &&
870 (tx->u.tx.rate->flags & IEEE80211_RATE_ERP) &&
63fc33ce 871 tx->u.tx.unicast && tx->sdata->use_protection &&
f0706e82
JB		 872 !(control->flags & IEEE80211_TXCTL_USE_RTS_CTS))
873 control->flags |= IEEE80211_TXCTL_USE_CTS_PROTECT;
874
875 /* Setup duration field for the first fragment of the frame. Duration
876 * for remaining fragments will be updated when they are being sent
877 * to low-level driver in ieee80211_tx(). */
878 dur = ieee80211_duration(tx, is_multicast_ether_addr(hdr->addr1),
879 tx->fragmented ? tx->u.tx.extra_frag[0]->len :
880 0);
881 hdr->duration_id = cpu_to_le16(dur);
882
883 if ((control->flags & IEEE80211_TXCTL_USE_RTS_CTS) ||
884 (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) {
885 struct ieee80211_rate *rate;
886
887 /* Do not use multiple retry rates when using RTS/CTS */
888 control->alt_retry_rate = -1;
889
890 /* Use min(data rate, max base rate) as CTS/RTS rate */
891 rate = tx->u.tx.rate;
892 while (rate > mode->rates &&
893 !(rate->flags & IEEE80211_RATE_BASIC))
894 rate--;
895
896 control->rts_cts_rate = rate->val;
897 control->rts_rate = rate;
898 }
899
900 if (tx->sta) {
901 tx->sta->tx_packets++;
902 tx->sta->tx_fragments++;
903 tx->sta->tx_bytes += tx->skb->len;
904 if (tx->u.tx.extra_frag) {
905 int i;
906 tx->sta->tx_fragments += tx->u.tx.num_extra_frag;
907 for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
908 tx->sta->tx_bytes +=
909 tx->u.tx.extra_frag[i]->len;
910 }
911 }
912 }
913
914 return TXRX_CONTINUE;
915}
916
917
918static ieee80211_txrx_result
919ieee80211_tx_h_check_assoc(struct ieee80211_txrx_data *tx)
920{
921#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
922 struct sk_buff *skb = tx->skb;
923 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
924#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
925 u32 sta_flags;
926
927 if (unlikely(tx->local->sta_scanning != 0) &&
928 ((tx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
929 (tx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PROBE_REQ))
930 return TXRX_DROP;
931
932 if (tx->u.tx.ps_buffered)
933 return TXRX_CONTINUE;
934
935 sta_flags = tx->sta ? tx->sta->flags : 0;
936
937 if (likely(tx->u.tx.unicast)) {
938 if (unlikely(!(sta_flags & WLAN_STA_ASSOC) &&
939 tx->sdata->type != IEEE80211_IF_TYPE_IBSS &&
940 (tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
941#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
942 printk(KERN_DEBUG "%s: dropped data frame to not "
943 "associated station " MAC_FMT "\n",
944 tx->dev->name, MAC_ARG(hdr->addr1));
945#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
946 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
947 return TXRX_DROP;
948 }
949 } else {
950 if (unlikely((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
951 tx->local->num_sta == 0 &&
952 !tx->local->allow_broadcast_always &&
953 tx->sdata->type != IEEE80211_IF_TYPE_IBSS)) {
954 /*
955 * No associated STAs - no need to send multicast
956 * frames.
957 */
958 return TXRX_DROP;
959 }
960 return TXRX_CONTINUE;
961 }
962
963 if (unlikely(!tx->u.tx.mgmt_interface && tx->sdata->ieee802_1x &&
964 !(sta_flags & WLAN_STA_AUTHORIZED))) {
965#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
966 printk(KERN_DEBUG "%s: dropped frame to " MAC_FMT
967 " (unauthorized port)\n", tx->dev->name,
968 MAC_ARG(hdr->addr1));
969#endif
970 I802_DEBUG_INC(tx->local->tx_handlers_drop_unauth_port);
971 return TXRX_DROP;
972 }
973
974 return TXRX_CONTINUE;
975}
976
977static ieee80211_txrx_result
978ieee80211_tx_h_sequence(struct ieee80211_txrx_data *tx)
979{
980 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
981
982 if (ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)) >= 24)
983 ieee80211_include_sequence(tx->sdata, hdr);
984
985 return TXRX_CONTINUE;
986}
987
988/* This function is called whenever the AP is about to exceed the maximum limit
989 * of buffered frames for power saving STAs. This situation should not really
990 * happen often during normal operation, so dropping the oldest buffered packet
991 * from each queue should be OK to make some room for new frames. */
992static void purge_old_ps_buffers(struct ieee80211_local *local)
993{
994 int total = 0, purged = 0;
995 struct sk_buff *skb;
996 struct ieee80211_sub_if_data *sdata;
997 struct sta_info *sta;
998
999 read_lock(&local->sub_if_lock);
1000 list_for_each_entry(sdata, &local->sub_if_list, list) {
1001 struct ieee80211_if_ap *ap;
1002 if (sdata->dev == local->mdev ||
1003 sdata->type != IEEE80211_IF_TYPE_AP)
1004 continue;
1005 ap = &sdata->u.ap;
1006 skb = skb_dequeue(&ap->ps_bc_buf);
1007 if (skb) {
1008 purged++;
1009 dev_kfree_skb(skb);
1010 }
1011 total += skb_queue_len(&ap->ps_bc_buf);
1012 }
1013 read_unlock(&local->sub_if_lock);
1014
1015 spin_lock_bh(&local->sta_lock);
1016 list_for_each_entry(sta, &local->sta_list, list) {
1017 skb = skb_dequeue(&sta->ps_tx_buf);
1018 if (skb) {
1019 purged++;
1020 dev_kfree_skb(skb);
1021 }
1022 total += skb_queue_len(&sta->ps_tx_buf);
1023 }
1024 spin_unlock_bh(&local->sta_lock);
1025
1026 local->total_ps_buffered = total;
1027 printk(KERN_DEBUG "%s: PS buffers full - purged %d frames\n",
1028 local->mdev->name, purged);
1029}
1030
1031
1032static inline ieee80211_txrx_result
1033ieee80211_tx_h_multicast_ps_buf(struct ieee80211_txrx_data *tx)
1034{
1035 /* broadcast/multicast frame */
1036 /* If any of the associated stations is in power save mode,
1037 * the frame is buffered to be sent after DTIM beacon frame */
1038 if ((tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) &&
1039 tx->sdata->type != IEEE80211_IF_TYPE_WDS &&
1040 tx->sdata->bss && atomic_read(&tx->sdata->bss->num_sta_ps) &&
1041 !(tx->fc & IEEE80211_FCTL_ORDER)) {
1042 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
1043 purge_old_ps_buffers(tx->local);
1044 if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >=
1045 AP_MAX_BC_BUFFER) {
1046 if (net_ratelimit()) {
1047 printk(KERN_DEBUG "%s: BC TX buffer full - "
1048 "dropping the oldest frame\n",
1049 tx->dev->name);
1050 }
1051 dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf));
1052 } else
1053 tx->local->total_ps_buffered++;
1054 skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb);
1055 return TXRX_QUEUED;
1056 }
1057
1058 return TXRX_CONTINUE;
1059}
1060
1061
1062static inline ieee80211_txrx_result
1063ieee80211_tx_h_unicast_ps_buf(struct ieee80211_txrx_data *tx)
1064{
1065 struct sta_info *sta = tx->sta;
1066
1067 if (unlikely(!sta ||
1068 ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT &&
1069 (tx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP)))
1070 return TXRX_CONTINUE;
1071
1072 if (unlikely((sta->flags & WLAN_STA_PS) && !sta->pspoll)) {
1073 struct ieee80211_tx_packet_data *pkt_data;
1074#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
1075 printk(KERN_DEBUG "STA " MAC_FMT " aid %d: PS buffer (entries "
1076 "before %d)\n",
1077 MAC_ARG(sta->addr), sta->aid,
1078 skb_queue_len(&sta->ps_tx_buf));
1079#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
1080 sta->flags |= WLAN_STA_TIM;
1081 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
1082 purge_old_ps_buffers(tx->local);
1083 if (skb_queue_len(&sta->ps_tx_buf) >= STA_MAX_TX_BUFFER) {
1084 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf);
1085 if (net_ratelimit()) {
1086 printk(KERN_DEBUG "%s: STA " MAC_FMT " TX "
1087 "buffer full - dropping oldest frame\n",
1088 tx->dev->name, MAC_ARG(sta->addr));
1089 }
1090 dev_kfree_skb(old);
1091 } else
1092 tx->local->total_ps_buffered++;
1093 /* Queue frame to be sent after STA sends an PS Poll frame */
1094 if (skb_queue_empty(&sta->ps_tx_buf)) {
1095 if (tx->local->ops->set_tim)
1096 tx->local->ops->set_tim(local_to_hw(tx->local),
1097 sta->aid, 1);
1098 if (tx->sdata->bss)
1099 bss_tim_set(tx->local, tx->sdata->bss, sta->aid);
1100 }
1101 pkt_data = (struct ieee80211_tx_packet_data *)tx->skb->cb;
1102 pkt_data->jiffies = jiffies;
1103 skb_queue_tail(&sta->ps_tx_buf, tx->skb);
1104 return TXRX_QUEUED;
1105 }
1106#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
1107 else if (unlikely(sta->flags & WLAN_STA_PS)) {
1108 printk(KERN_DEBUG "%s: STA " MAC_FMT " in PS mode, but pspoll "
1109 "set -> send frame\n", tx->dev->name,
1110 MAC_ARG(sta->addr));
1111 }
1112#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
1113 sta->pspoll = 0;
1114
1115 return TXRX_CONTINUE;
1116}
1117
1118
1119static ieee80211_txrx_result
1120ieee80211_tx_h_ps_buf(struct ieee80211_txrx_data *tx)
1121{
1122 if (unlikely(tx->u.tx.ps_buffered))
1123 return TXRX_CONTINUE;
1124
1125 if (tx->u.tx.unicast)
1126 return ieee80211_tx_h_unicast_ps_buf(tx);
1127 else
1128 return ieee80211_tx_h_multicast_ps_buf(tx);
1129}
1130
1131
e4c967c6
AG		 1132/*
1133 * deal with packet injection down monitor interface
1134 * with Radiotap Header -- only called for monitor mode interface
1135 */
1136
1137static ieee80211_txrx_result
1138__ieee80211_parse_tx_radiotap(
1139 struct ieee80211_txrx_data *tx,
1140 struct sk_buff *skb, struct ieee80211_tx_control *control)
1141{
1142 /*
1143 * this is the moment to interpret and discard the radiotap header that
1144 * must be at the start of the packet injected in Monitor mode
1145 *
1146 * Need to take some care with endian-ness since radiotap
1147 * args are little-endian
1148 */
1149
1150 struct ieee80211_radiotap_iterator iterator;
1151 struct ieee80211_radiotap_header *rthdr =
1152 (struct ieee80211_radiotap_header *) skb->data;
1153 struct ieee80211_hw_mode *mode = tx->local->hw.conf.mode;
1154 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len);
1155
1156 /*
1157 * default control situation for all injected packets
1158 * FIXME: this does not suit all usage cases, expand to allow control
1159 */
1160
1161 control->retry_limit = 1; /* no retry */
1162 control->key_idx = -1; /* no encryption key */
1163 control->flags &= ~(IEEE80211_TXCTL_USE_RTS_CTS |
1164 IEEE80211_TXCTL_USE_CTS_PROTECT);
1165 control->flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT |
1166 IEEE80211_TXCTL_NO_ACK;
1167 control->antenna_sel_tx = 0; /* default to default antenna */
1168
1169 /*
1170 * for every radiotap entry that is present
1171 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1172 * entries present, or -EINVAL on error)
1173 */
1174
1175 while (!ret) {
1176 int i, target_rate;
1177
1178 ret = ieee80211_radiotap_iterator_next(&iterator);
1179
1180 if (ret)
1181 continue;
1182
1183 /* see if this argument is something we can use */
1184 switch (iterator.this_arg_index) {
1185 /*
1186 * You must take care when dereferencing iterator.this_arg
1187 * for multibyte types... the pointer is not aligned. Use
1188 * get_unaligned((type *)iterator.this_arg) to dereference
1189 * iterator.this_arg for type "type" safely on all arches.
1190 */
1191 case IEEE80211_RADIOTAP_RATE:
1192 /*
1193 * radiotap rate u8 is in 500kbps units eg, 0x02=1Mbps
1194 * ieee80211 rate int is in 100kbps units eg, 0x0a=1Mbps
1195 */
1196 target_rate = (*iterator.this_arg) * 5;
1197 for (i = 0; i < mode->num_rates; i++) {
1198 struct ieee80211_rate *r = &mode->rates[i];
1199
1200 if (r->rate > target_rate)
1201 continue;
1202
1203 control->rate = r;
1204
1205 if (r->flags & IEEE80211_RATE_PREAMBLE2)
1206 control->tx_rate = r->val2;
1207 else
1208 control->tx_rate = r->val;
1209
1210 /* end on exact match */
1211 if (r->rate == target_rate)
1212 i = mode->num_rates;
1213 }
1214 break;
1215
1216 case IEEE80211_RADIOTAP_ANTENNA:
1217 /*
1218 * radiotap uses 0 for 1st ant, mac80211 is 1 for
1219 * 1st ant
1220 */
1221 control->antenna_sel_tx = (*iterator.this_arg) + 1;
1222 break;
1223
1224 case IEEE80211_RADIOTAP_DBM_TX_POWER:
1225 control->power_level = *iterator.this_arg;
1226 break;
1227
1228 case IEEE80211_RADIOTAP_FLAGS:
1229 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
1230 /*
1231 * this indicates that the skb we have been
1232 * handed has the 32-bit FCS CRC at the end...
1233 * we should react to that by snipping it off
1234 * because it will be recomputed and added
1235 * on transmission
1236 */
1237 if (skb->len < (iterator.max_length + FCS_LEN))
1238 return TXRX_DROP;
1239
1240 skb_trim(skb, skb->len - FCS_LEN);
1241 }
1242 break;
1243
1244 default:
1245 break;
1246 }
1247 }
1248
1249 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
1250 return TXRX_DROP;
1251
1252 /*
1253 * remove the radiotap header
1254 * iterator->max_length was sanity-checked against
1255 * skb->len by iterator init
1256 */
1257 skb_pull(skb, iterator.max_length);
1258
1259 return TXRX_CONTINUE;
1260}
1261
1262
1263static ieee80211_txrx_result inline
f0706e82
JB		 1264__ieee80211_tx_prepare(struct ieee80211_txrx_data *tx,
1265 struct sk_buff *skb,
1266 struct net_device *dev,
1267 struct ieee80211_tx_control *control)
1268{
1269 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1270 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
e4c967c6
AG		 1271 struct ieee80211_sub_if_data *sdata;
1272 ieee80211_txrx_result res = TXRX_CONTINUE;
1273
f0706e82
JB		 1274 int hdrlen;
1275
1276 memset(tx, 0, sizeof(*tx));
1277 tx->skb = skb;
1278 tx->dev = dev; /* use original interface */
1279 tx->local = local;
1280 tx->sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1281 tx->sta = sta_info_get(local, hdr->addr1);
1282 tx->fc = le16_to_cpu(hdr->frame_control);
e4c967c6
AG		 1283
1284 /*
1285 * set defaults for things that can be set by
1286 * injected radiotap headers
1287 */
f0706e82 1288 control->power_level = local->hw.conf.power_level;
e4c967c6
AG		 1289 control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
1290 if (local->sta_antenna_sel != STA_ANTENNA_SEL_AUTO && tx->sta)
1291 control->antenna_sel_tx = tx->sta->antenna_sel_tx;
1292
1293 /* process and remove the injection radiotap header */
1294 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1295 if (unlikely(sdata->type == IEEE80211_IF_TYPE_MNTR)) {
1296 if (__ieee80211_parse_tx_radiotap(tx, skb, control) ==
1297 TXRX_DROP) {
1298 return TXRX_DROP;
1299 }
1300 /*
1301 * we removed the radiotap header after this point,
1302 * we filled control with what we could use
1303 * set to the actual ieee header now
1304 */
1305 hdr = (struct ieee80211_hdr *) skb->data;
1306 res = TXRX_QUEUED; /* indication it was monitor packet */
1307 }
1308
f0706e82
JB		 1309 tx->u.tx.control = control;
1310 tx->u.tx.unicast = !is_multicast_ether_addr(hdr->addr1);
1311 if (is_multicast_ether_addr(hdr->addr1))
1312 control->flags |= IEEE80211_TXCTL_NO_ACK;
1313 else
1314 control->flags &= ~IEEE80211_TXCTL_NO_ACK;
1315 tx->fragmented = local->fragmentation_threshold <
1316 IEEE80211_MAX_FRAG_THRESHOLD && tx->u.tx.unicast &&
1317 skb->len + FCS_LEN > local->fragmentation_threshold &&
1318 (!local->ops->set_frag_threshold);
1319 if (!tx->sta)
1320 control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK;
1321 else if (tx->sta->clear_dst_mask) {
1322 control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK;
1323 tx->sta->clear_dst_mask = 0;
1324 }
f0706e82
JB		 1325 hdrlen = ieee80211_get_hdrlen(tx->fc);
1326 if (skb->len > hdrlen + sizeof(rfc1042_header) + 2) {
1327 u8 *pos = &skb->data[hdrlen + sizeof(rfc1042_header)];
1328 tx->ethertype = (pos[0] << 8) | pos[1];
1329 }
1330 control->flags |= IEEE80211_TXCTL_FIRST_FRAGMENT;
1331
e4c967c6 1332 return res;
f0706e82
JB		 1333}
1334
1335static int inline is_ieee80211_device(struct net_device *dev,
1336 struct net_device *master)
1337{
1338 return (wdev_priv(dev->ieee80211_ptr) ==
1339 wdev_priv(master->ieee80211_ptr));
1340}
1341
1342/* Device in tx->dev has a reference added; use dev_put(tx->dev) when
1343 * finished with it. */
1344static int inline ieee80211_tx_prepare(struct ieee80211_txrx_data *tx,
1345 struct sk_buff *skb,
1346 struct net_device *mdev,
1347 struct ieee80211_tx_control *control)
1348{
1349 struct ieee80211_tx_packet_data *pkt_data;
1350 struct net_device *dev;
1351
1352 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
1353 dev = dev_get_by_index(pkt_data->ifindex);
1354 if (unlikely(dev && !is_ieee80211_device(dev, mdev))) {
1355 dev_put(dev);
1356 dev = NULL;
1357 }
1358 if (unlikely(!dev))
1359 return -ENODEV;
1360 __ieee80211_tx_prepare(tx, skb, dev, control);
1361 return 0;
1362}
1363
1364static inline int __ieee80211_queue_stopped(const struct ieee80211_local *local,
1365 int queue)
1366{
1367 return test_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]);
1368}
1369
1370static inline int __ieee80211_queue_pending(const struct ieee80211_local *local,
1371 int queue)
1372{
1373 return test_bit(IEEE80211_LINK_STATE_PENDING, &local->state[queue]);
1374}
1375
1376#define IEEE80211_TX_OK 0
1377#define IEEE80211_TX_AGAIN 1
1378#define IEEE80211_TX_FRAG_AGAIN 2
1379
1380static int __ieee80211_tx(struct ieee80211_local *local, struct sk_buff *skb,
1381 struct ieee80211_txrx_data *tx)
1382{
1383 struct ieee80211_tx_control *control = tx->u.tx.control;
1384 int ret, i;
1385
1386 if (!ieee80211_qdisc_installed(local->mdev) &&
1387 __ieee80211_queue_stopped(local, 0)) {
1388 netif_stop_queue(local->mdev);
1389 return IEEE80211_TX_AGAIN;
1390 }
1391 if (skb) {
1392 ieee80211_dump_frame(local->mdev->name, "TX to low-level driver", skb);
1393 ret = local->ops->tx(local_to_hw(local), skb, control);
1394 if (ret)
1395 return IEEE80211_TX_AGAIN;
1396 local->mdev->trans_start = jiffies;
1397 ieee80211_led_tx(local, 1);
1398 }
1399 if (tx->u.tx.extra_frag) {
1400 control->flags &= ~(IEEE80211_TXCTL_USE_RTS_CTS |
1401 IEEE80211_TXCTL_USE_CTS_PROTECT |
1402 IEEE80211_TXCTL_CLEAR_DST_MASK |
1403 IEEE80211_TXCTL_FIRST_FRAGMENT);
1404 for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
1405 if (!tx->u.tx.extra_frag[i])
1406 continue;
1407 if (__ieee80211_queue_stopped(local, control->queue))
1408 return IEEE80211_TX_FRAG_AGAIN;
1409 if (i == tx->u.tx.num_extra_frag) {
1410 control->tx_rate = tx->u.tx.last_frag_hwrate;
1411 control->rate = tx->u.tx.last_frag_rate;
1412 if (tx->u.tx.probe_last_frag)
1413 control->flags |=
1414 IEEE80211_TXCTL_RATE_CTRL_PROBE;
1415 else
1416 control->flags &=
1417 ~IEEE80211_TXCTL_RATE_CTRL_PROBE;
1418 }
1419
1420 ieee80211_dump_frame(local->mdev->name,
1421 "TX to low-level driver",
1422 tx->u.tx.extra_frag[i]);
1423 ret = local->ops->tx(local_to_hw(local),
1424 tx->u.tx.extra_frag[i],
1425 control);
1426 if (ret)
1427 return IEEE80211_TX_FRAG_AGAIN;
1428 local->mdev->trans_start = jiffies;
1429 ieee80211_led_tx(local, 1);
1430 tx->u.tx.extra_frag[i] = NULL;
1431 }
1432 kfree(tx->u.tx.extra_frag);
1433 tx->u.tx.extra_frag = NULL;
1434 }
1435 return IEEE80211_TX_OK;
1436}
1437
1438static int ieee80211_tx(struct net_device *dev, struct sk_buff *skb,
1439 struct ieee80211_tx_control *control, int mgmt)
1440{
1441 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1442 struct sta_info *sta;
1443 ieee80211_tx_handler *handler;
1444 struct ieee80211_txrx_data tx;
e4c967c6 1445 ieee80211_txrx_result res = TXRX_DROP, res_prepare;
f0706e82
JB		 1446 int ret, i;
1447
1448 WARN_ON(__ieee80211_queue_pending(local, control->queue));
1449
1450 if (unlikely(skb->len < 10)) {
1451 dev_kfree_skb(skb);
1452 return 0;
1453 }
1454
e4c967c6
AG		 1455 res_prepare = __ieee80211_tx_prepare(&tx, skb, dev, control);
1456
1457 if (res_prepare == TXRX_DROP) {
1458 dev_kfree_skb(skb);
1459 return 0;
1460 }
1461
f0706e82
JB		 1462 sta = tx.sta;
1463 tx.u.tx.mgmt_interface = mgmt;
1464 tx.u.tx.mode = local->hw.conf.mode;
1465
e4c967c6
AG		 1466 if (res_prepare == TXRX_QUEUED) { /* if it was an injected packet */
1467 res = TXRX_CONTINUE;
1468 } else {
1469 for (handler = local->tx_handlers; *handler != NULL;
1470 handler++) {
1471 res = (*handler)(&tx);
1472 if (res != TXRX_CONTINUE)
1473 break;
1474 }
f0706e82
JB		 1475 }
1476
1477 skb = tx.skb; /* handlers are allowed to change skb */
1478
1479 if (sta)
1480 sta_info_put(sta);
1481
1482 if (unlikely(res == TXRX_DROP)) {
1483 I802_DEBUG_INC(local->tx_handlers_drop);
1484 goto drop;
1485 }
1486
1487 if (unlikely(res == TXRX_QUEUED)) {
1488 I802_DEBUG_INC(local->tx_handlers_queued);
1489 return 0;
1490 }
1491
1492 if (tx.u.tx.extra_frag) {
1493 for (i = 0; i < tx.u.tx.num_extra_frag; i++) {
1494 int next_len, dur;
1495 struct ieee80211_hdr *hdr =
1496 (struct ieee80211_hdr *)
1497 tx.u.tx.extra_frag[i]->data;
1498
1499 if (i + 1 < tx.u.tx.num_extra_frag) {
1500 next_len = tx.u.tx.extra_frag[i + 1]->len;
1501 } else {
1502 next_len = 0;
1503 tx.u.tx.rate = tx.u.tx.last_frag_rate;
1504 tx.u.tx.last_frag_hwrate = tx.u.tx.rate->val;
1505 }
1506 dur = ieee80211_duration(&tx, 0, next_len);
1507 hdr->duration_id = cpu_to_le16(dur);
1508 }
1509 }
1510
1511retry:
1512 ret = __ieee80211_tx(local, skb, &tx);
1513 if (ret) {
1514 struct ieee80211_tx_stored_packet *store =
1515 &local->pending_packet[control->queue];
1516
1517 if (ret == IEEE80211_TX_FRAG_AGAIN)
1518 skb = NULL;
1519 set_bit(IEEE80211_LINK_STATE_PENDING,
1520 &local->state[control->queue]);
1521 smp_mb();
1522 /* When the driver gets out of buffers during sending of
1523 * fragments and calls ieee80211_stop_queue, there is
1524 * a small window between IEEE80211_LINK_STATE_XOFF and
1525 * IEEE80211_LINK_STATE_PENDING flags are set. If a buffer
1526 * gets available in that window (i.e. driver calls
1527 * ieee80211_wake_queue), we would end up with ieee80211_tx
1528 * called with IEEE80211_LINK_STATE_PENDING. Prevent this by
1529 * continuing transmitting here when that situation is
1530 * possible to have happened. */
1531 if (!__ieee80211_queue_stopped(local, control->queue)) {
1532 clear_bit(IEEE80211_LINK_STATE_PENDING,
1533 &local->state[control->queue]);
1534 goto retry;
1535 }
1536 memcpy(&store->control, control,
1537 sizeof(struct ieee80211_tx_control));
1538 store->skb = skb;
1539 store->extra_frag = tx.u.tx.extra_frag;
1540 store->num_extra_frag = tx.u.tx.num_extra_frag;
1541 store->last_frag_hwrate = tx.u.tx.last_frag_hwrate;
1542 store->last_frag_rate = tx.u.tx.last_frag_rate;
1543 store->last_frag_rate_ctrl_probe = tx.u.tx.probe_last_frag;
1544 }
1545 return 0;
1546
1547 drop:
1548 if (skb)
1549 dev_kfree_skb(skb);
1550 for (i = 0; i < tx.u.tx.num_extra_frag; i++)
1551 if (tx.u.tx.extra_frag[i])
1552 dev_kfree_skb(tx.u.tx.extra_frag[i]);
1553 kfree(tx.u.tx.extra_frag);
1554 return 0;
1555}
1556
1557static void ieee80211_tx_pending(unsigned long data)
1558{
1559 struct ieee80211_local *local = (struct ieee80211_local *)data;
1560 struct net_device *dev = local->mdev;
1561 struct ieee80211_tx_stored_packet *store;
1562 struct ieee80211_txrx_data tx;
1563 int i, ret, reschedule = 0;
1564
1565 netif_tx_lock_bh(dev);
1566 for (i = 0; i < local->hw.queues; i++) {
1567 if (__ieee80211_queue_stopped(local, i))
1568 continue;
1569 if (!__ieee80211_queue_pending(local, i)) {
1570 reschedule = 1;
1571 continue;
1572 }
1573 store = &local->pending_packet[i];
1574 tx.u.tx.control = &store->control;
1575 tx.u.tx.extra_frag = store->extra_frag;
1576 tx.u.tx.num_extra_frag = store->num_extra_frag;
1577 tx.u.tx.last_frag_hwrate = store->last_frag_hwrate;
1578 tx.u.tx.last_frag_rate = store->last_frag_rate;
1579 tx.u.tx.probe_last_frag = store->last_frag_rate_ctrl_probe;
1580 ret = __ieee80211_tx(local, store->skb, &tx);
1581 if (ret) {
1582 if (ret == IEEE80211_TX_FRAG_AGAIN)
1583 store->skb = NULL;
1584 } else {
1585 clear_bit(IEEE80211_LINK_STATE_PENDING,
1586 &local->state[i]);
1587 reschedule = 1;
1588 }
1589 }
1590 netif_tx_unlock_bh(dev);
1591 if (reschedule) {
1592 if (!ieee80211_qdisc_installed(dev)) {
1593 if (!__ieee80211_queue_stopped(local, 0))
1594 netif_wake_queue(dev);
1595 } else
1596 netif_schedule(dev);
1597 }
1598}
1599
1600static void ieee80211_clear_tx_pending(struct ieee80211_local *local)
1601{
1602 int i, j;
1603 struct ieee80211_tx_stored_packet *store;
1604
1605 for (i = 0; i < local->hw.queues; i++) {
1606 if (!__ieee80211_queue_pending(local, i))
1607 continue;
1608 store = &local->pending_packet[i];
1609 kfree_skb(store->skb);
1610 for (j = 0; j < store->num_extra_frag; j++)
1611 kfree_skb(store->extra_frag[j]);
1612 kfree(store->extra_frag);
1613 clear_bit(IEEE80211_LINK_STATE_PENDING, &local->state[i]);
1614 }
1615}
1616
1617static int ieee80211_master_start_xmit(struct sk_buff *skb,
1618 struct net_device *dev)
1619{
1620 struct ieee80211_tx_control control;
1621 struct ieee80211_tx_packet_data *pkt_data;
1622 struct net_device *odev = NULL;
1623 struct ieee80211_sub_if_data *osdata;
1624 int headroom;
1625 int ret;
1626
1627 /*
1628 * copy control out of the skb so other people can use skb->cb
1629 */
1630 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
1631 memset(&control, 0, sizeof(struct ieee80211_tx_control));
1632
1633 if (pkt_data->ifindex)
1634 odev = dev_get_by_index(pkt_data->ifindex);
1635 if (unlikely(odev && !is_ieee80211_device(odev, dev))) {
1636 dev_put(odev);
1637 odev = NULL;
1638 }
1639 if (unlikely(!odev)) {
1640#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1641 printk(KERN_DEBUG "%s: Discarded packet with nonexistent "
1642 "originating device\n", dev->name);
1643#endif
1644 dev_kfree_skb(skb);
1645 return 0;
1646 }
1647 osdata = IEEE80211_DEV_TO_SUB_IF(odev);
1648
b306f453 1649 headroom = osdata->local->tx_headroom + IEEE80211_ENCRYPT_HEADROOM;
f0706e82
JB		 1650 if (skb_headroom(skb) < headroom) {
1651 if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) {
1652 dev_kfree_skb(skb);
0e7088de 1653 dev_put(odev);
f0706e82
JB		 1654 return 0;
1655 }
1656 }
1657
1658 control.ifindex = odev->ifindex;
1659 control.type = osdata->type;
1660 if (pkt_data->req_tx_status)
1661 control.flags |= IEEE80211_TXCTL_REQ_TX_STATUS;
1662 if (pkt_data->do_not_encrypt)
1663 control.flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT;
1664 if (pkt_data->requeue)
1665 control.flags |= IEEE80211_TXCTL_REQUEUE;
1666 control.queue = pkt_data->queue;
1667
1668 ret = ieee80211_tx(odev, skb, &control,
1669 control.type == IEEE80211_IF_TYPE_MGMT);
1670 dev_put(odev);
1671
1672 return ret;
1673}
1674
1675
40f7cac9
JB		 1676int ieee80211_monitor_start_xmit(struct sk_buff *skb,
1677 struct net_device *dev)
1678{
1679 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1680 struct ieee80211_tx_packet_data *pkt_data;
1681 struct ieee80211_radiotap_header *prthdr =
1682 (struct ieee80211_radiotap_header *)skb->data;
1683 u16 len;
1684
1685 /*
1686 * there must be a radiotap header at the
1687 * start in this case
1688 */
1689 if (unlikely(prthdr->it_version)) {
1690 /* only version 0 is supported */
1691 dev_kfree_skb(skb);
1692 return NETDEV_TX_OK;
1693 }
1694
1695 skb->dev = local->mdev;
1696
1697 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
1698 memset(pkt_data, 0, sizeof(*pkt_data));
1699 pkt_data->ifindex = dev->ifindex;
1700 pkt_data->mgmt_iface = 0;
1701 pkt_data->do_not_encrypt = 1;
1702
1703 /* above needed because we set skb device to master */
1704
1705 /*
1706 * fix up the pointers accounting for the radiotap
1707 * header still being in there. We are being given
1708 * a precooked IEEE80211 header so no need for
1709 * normal processing
1710 */
1711 len = le16_to_cpu(get_unaligned(&prthdr->it_len));
1712 skb_set_mac_header(skb, len);
1713 skb_set_network_header(skb, len + sizeof(struct ieee80211_hdr));
1714 skb_set_transport_header(skb, len + sizeof(struct ieee80211_hdr));
1715
1716 /*
1717 * pass the radiotap header up to
1718 * the next stage intact
1719 */
1720 dev_queue_xmit(skb);
1721
1722 return NETDEV_TX_OK;
1723}
1724
1725
f0706e82
JB		 1726/**
1727 * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type
1728 * subinterfaces (wlan#, WDS, and VLAN interfaces)
1729 * @skb: packet to be sent
1730 * @dev: incoming interface
1731 *
1732 * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will
1733 * not be freed, and caller is responsible for either retrying later or freeing
1734 * skb).
1735 *
1736 * This function takes in an Ethernet header and encapsulates it with suitable
1737 * IEEE 802.11 header based on which interface the packet is coming in. The
1738 * encapsulated packet will then be passed to master interface, wlan#.11, for
1739 * transmission (through low-level driver).
1740 */
40f7cac9
JB		 1741int ieee80211_subif_start_xmit(struct sk_buff *skb,
1742 struct net_device *dev)
f0706e82
JB		 1743{
1744 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1745 struct ieee80211_tx_packet_data *pkt_data;
1746 struct ieee80211_sub_if_data *sdata;
1747 int ret = 1, head_need;
1748 u16 ethertype, hdrlen, fc;
1749 struct ieee80211_hdr hdr;
1750 const u8 *encaps_data;
1751 int encaps_len, skip_header_bytes;
1752 int nh_pos, h_pos, no_encrypt = 0;
1753 struct sta_info *sta;
1754
1755 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1756 if (unlikely(skb->len < ETH_HLEN)) {
1757 printk(KERN_DEBUG "%s: short skb (len=%d)\n",
1758 dev->name, skb->len);
1759 ret = 0;
1760 goto fail;
1761 }
1762
1763 nh_pos = skb_network_header(skb) - skb->data;
1764 h_pos = skb_transport_header(skb) - skb->data;
1765
1766 /* convert Ethernet header to proper 802.11 header (based on
1767 * operation mode) */
1768 ethertype = (skb->data[12] << 8) | skb->data[13];
1769 /* TODO: handling for 802.1x authorized/unauthorized port */
1770 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA;
1771
1772 if (likely(sdata->type == IEEE80211_IF_TYPE_AP ||
1773 sdata->type == IEEE80211_IF_TYPE_VLAN)) {
1774 fc |= IEEE80211_FCTL_FROMDS;
1775 /* DA BSSID SA */
1776 memcpy(hdr.addr1, skb->data, ETH_ALEN);
1777 memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN);
1778 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
1779 hdrlen = 24;
1780 } else if (sdata->type == IEEE80211_IF_TYPE_WDS) {
1781 fc |= IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS;
1782 /* RA TA DA SA */
1783 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
1784 memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN);
1785 memcpy(hdr.addr3, skb->data, ETH_ALEN);
1786 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
1787 hdrlen = 30;
1788 } else if (sdata->type == IEEE80211_IF_TYPE_STA) {
1789 fc |= IEEE80211_FCTL_TODS;
1790 /* BSSID SA DA */
1791 memcpy(hdr.addr1, sdata->u.sta.bssid, ETH_ALEN);
1792 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
1793 memcpy(hdr.addr3, skb->data, ETH_ALEN);
1794 hdrlen = 24;
1795 } else if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
1796 /* DA SA BSSID */
1797 memcpy(hdr.addr1, skb->data, ETH_ALEN);
1798 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
1799 memcpy(hdr.addr3, sdata->u.sta.bssid, ETH_ALEN);
1800 hdrlen = 24;
1801 } else {
1802 ret = 0;
1803 goto fail;
1804 }
1805
1806 /* receiver is QoS enabled, use a QoS type frame */
1807 sta = sta_info_get(local, hdr.addr1);
1808 if (sta) {
1809 if (sta->flags & WLAN_STA_WME) {
1810 fc |= IEEE80211_STYPE_QOS_DATA;
1811 hdrlen += 2;
1812 }
1813 sta_info_put(sta);
1814 }
1815
1816 hdr.frame_control = cpu_to_le16(fc);
1817 hdr.duration_id = 0;
1818 hdr.seq_ctrl = 0;
1819
1820 skip_header_bytes = ETH_HLEN;
1821 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
1822 encaps_data = bridge_tunnel_header;
1823 encaps_len = sizeof(bridge_tunnel_header);
1824 skip_header_bytes -= 2;
1825 } else if (ethertype >= 0x600) {
1826 encaps_data = rfc1042_header;
1827 encaps_len = sizeof(rfc1042_header);
1828 skip_header_bytes -= 2;
1829 } else {
1830 encaps_data = NULL;
1831 encaps_len = 0;
1832 }
1833
1834 skb_pull(skb, skip_header_bytes);
1835 nh_pos -= skip_header_bytes;
1836 h_pos -= skip_header_bytes;
1837
1838 /* TODO: implement support for fragments so that there is no need to
1839 * reallocate and copy payload; it might be enough to support one
1840 * extra fragment that would be copied in the beginning of the frame
1841 * data.. anyway, it would be nice to include this into skb structure
1842 * somehow
1843 *
1844 * There are few options for this:
1845 * use skb->cb as an extra space for 802.11 header
1846 * allocate new buffer if not enough headroom
1847 * make sure that there is enough headroom in every skb by increasing
1848 * build in headroom in __dev_alloc_skb() (linux/skbuff.h) and
1849 * alloc_skb() (net/core/skbuff.c)
1850 */
b306f453 1851 head_need = hdrlen + encaps_len + local->tx_headroom;
f0706e82
JB		 1852 head_need -= skb_headroom(skb);
1853
1854 /* We are going to modify skb data, so make a copy of it if happens to
1855 * be cloned. This could happen, e.g., with Linux bridge code passing
1856 * us broadcast frames. */
1857
1858 if (head_need > 0 || skb_cloned(skb)) {
1859#if 0
1860 printk(KERN_DEBUG "%s: need to reallocate buffer for %d bytes "
1861 "of headroom\n", dev->name, head_need);
1862#endif
1863
1864 if (skb_cloned(skb))
1865 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
1866 else
1867 I802_DEBUG_INC(local->tx_expand_skb_head);
1868 /* Since we have to reallocate the buffer, make sure that there
1869 * is enough room for possible WEP IV/ICV and TKIP (8 bytes
1870 * before payload and 12 after). */
1871 if (pskb_expand_head(skb, (head_need > 0 ? head_need + 8 : 8),
1872 12, GFP_ATOMIC)) {
1873 printk(KERN_DEBUG "%s: failed to reallocate TX buffer"
1874 "\n", dev->name);
1875 goto fail;
1876 }
1877 }
1878
1879 if (encaps_data) {
1880 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
1881 nh_pos += encaps_len;
1882 h_pos += encaps_len;
1883 }
1884 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
1885 nh_pos += hdrlen;
1886 h_pos += hdrlen;
1887
1888 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
1889 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
40f7cac9 1890 pkt_data->ifindex = dev->ifindex;
f0706e82
JB		 1891 pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
1892 pkt_data->do_not_encrypt = no_encrypt;
1893
1894 skb->dev = local->mdev;
1895 sdata->stats.tx_packets++;
1896 sdata->stats.tx_bytes += skb->len;
1897
1898 /* Update skb pointers to various headers since this modified frame
1899 * is going to go through Linux networking code that may potentially
1900 * need things like pointer to IP header. */
1901 skb_set_mac_header(skb, 0);
1902 skb_set_network_header(skb, nh_pos);
1903 skb_set_transport_header(skb, h_pos);
1904
1905 dev->trans_start = jiffies;
1906 dev_queue_xmit(skb);
1907
1908 return 0;
1909
1910 fail:
1911 if (!ret)
1912 dev_kfree_skb(skb);
1913
1914 return ret;
1915}
1916
1917
1918/*
1919 * This is the transmit routine for the 802.11 type interfaces
1920 * called by upper layers of the linux networking
1921 * stack when it has a frame to transmit
1922 */
1923static int
1924ieee80211_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev)
1925{
1926 struct ieee80211_sub_if_data *sdata;
1927 struct ieee80211_tx_packet_data *pkt_data;
1928 struct ieee80211_hdr *hdr;
1929 u16 fc;
1930
1931 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1932
1933 if (skb->len < 10) {
1934 dev_kfree_skb(skb);
1935 return 0;
1936 }
1937
b306f453
JB		 1938 if (skb_headroom(skb) < sdata->local->tx_headroom) {
1939 if (pskb_expand_head(skb, sdata->local->tx_headroom,
1940 0, GFP_ATOMIC)) {
f0706e82
JB		 1941 dev_kfree_skb(skb);
1942 return 0;
1943 }
1944 }
1945
1946 hdr = (struct ieee80211_hdr *) skb->data;
1947 fc = le16_to_cpu(hdr->frame_control);
1948
1949 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
1950 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
1951 pkt_data->ifindex = sdata->dev->ifindex;
1952 pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
1953
1954 skb->priority = 20; /* use hardcoded priority for mgmt TX queue */
1955 skb->dev = sdata->local->mdev;
1956
1957 /*
1958 * We're using the protocol field of the the frame control header
1959 * to request TX callback for hostapd. BIT(1) is checked.
1960 */
1961 if ((fc & BIT(1)) == BIT(1)) {
1962 pkt_data->req_tx_status = 1;
1963 fc &= ~BIT(1);
1964 hdr->frame_control = cpu_to_le16(fc);
1965 }
1966
1967 pkt_data->do_not_encrypt = !(fc & IEEE80211_FCTL_PROTECTED);
1968
1969 sdata->stats.tx_packets++;
1970 sdata->stats.tx_bytes += skb->len;
1971
1972 dev_queue_xmit(skb);
1973
1974 return 0;
1975}
1976
1977
1978static void ieee80211_beacon_add_tim(struct ieee80211_local *local,
1979 struct ieee80211_if_ap *bss,
1980 struct sk_buff *skb)
1981{
1982 u8 *pos, *tim;
1983 int aid0 = 0;
1984 int i, have_bits = 0, n1, n2;
1985
1986 /* Generate bitmap for TIM only if there are any STAs in power save
1987 * mode. */
1988 spin_lock_bh(&local->sta_lock);
1989 if (atomic_read(&bss->num_sta_ps) > 0)
1990 /* in the hope that this is faster than
1991 * checking byte-for-byte */
1992 have_bits = !bitmap_empty((unsigned long*)bss->tim,
1993 IEEE80211_MAX_AID+1);
1994
1995 if (bss->dtim_count == 0)
1996 bss->dtim_count = bss->dtim_period - 1;
1997 else
1998 bss->dtim_count--;
1999
2000 tim = pos = (u8 *) skb_put(skb, 6);
2001 *pos++ = WLAN_EID_TIM;
2002 *pos++ = 4;
2003 *pos++ = bss->dtim_count;
2004 *pos++ = bss->dtim_period;
2005
2006 if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf))
2007 aid0 = 1;
2008
2009 if (have_bits) {
2010 /* Find largest even number N1 so that bits numbered 1 through
2011 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
2012 * (N2 + 1) x 8 through 2007 are 0. */
2013 n1 = 0;
2014 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
2015 if (bss->tim[i]) {
2016 n1 = i & 0xfe;
2017 break;
2018 }
2019 }
2020 n2 = n1;
2021 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
2022 if (bss->tim[i]) {
2023 n2 = i;
2024 break;
2025 }
2026 }
2027
2028 /* Bitmap control */
2029 *pos++ = n1 | aid0;
2030 /* Part Virt Bitmap */
2031 memcpy(pos, bss->tim + n1, n2 - n1 + 1);
2032
2033 tim[1] = n2 - n1 + 4;
2034 skb_put(skb, n2 - n1);
2035 } else {
2036 *pos++ = aid0; /* Bitmap control */
2037 *pos++ = 0; /* Part Virt Bitmap */
2038 }
2039 spin_unlock_bh(&local->sta_lock);
2040}
2041
2042
2043struct sk_buff * ieee80211_beacon_get(struct ieee80211_hw *hw, int if_id,
2044 struct ieee80211_tx_control *control)
2045{
2046 struct ieee80211_local *local = hw_to_local(hw);
2047 struct sk_buff *skb;
2048 struct net_device *bdev;
2049 struct ieee80211_sub_if_data *sdata = NULL;
2050 struct ieee80211_if_ap *ap = NULL;
2051 struct ieee80211_rate *rate;
2052 struct rate_control_extra extra;
2053 u8 *b_head, *b_tail;
2054 int bh_len, bt_len;
2055
2056 bdev = dev_get_by_index(if_id);
2057 if (bdev) {
2058 sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
2059 ap = &sdata->u.ap;
2060 dev_put(bdev);
2061 }
2062
2063 if (!ap || sdata->type != IEEE80211_IF_TYPE_AP ||
2064 !ap->beacon_head) {
2065#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2066 if (net_ratelimit())
2067 printk(KERN_DEBUG "no beacon data avail for idx=%d "
2068 "(%s)\n", if_id, bdev ? bdev->name : "N/A");
2069#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
2070 return NULL;
2071 }
2072
2073 /* Assume we are generating the normal beacon locally */
2074 b_head = ap->beacon_head;
2075 b_tail = ap->beacon_tail;
2076 bh_len = ap->beacon_head_len;
2077 bt_len = ap->beacon_tail_len;
2078
b306f453 2079 skb = dev_alloc_skb(local->tx_headroom +
f0706e82
JB		 2080 bh_len + bt_len + 256 /* maximum TIM len */);
2081 if (!skb)
2082 return NULL;
2083
b306f453 2084 skb_reserve(skb, local->tx_headroom);
f0706e82
JB		 2085 memcpy(skb_put(skb, bh_len), b_head, bh_len);
2086
2087 ieee80211_include_sequence(sdata, (struct ieee80211_hdr *)skb->data);
2088
2089 ieee80211_beacon_add_tim(local, ap, skb);
2090
2091 if (b_tail) {
2092 memcpy(skb_put(skb, bt_len), b_tail, bt_len);
2093 }
2094
2095 if (control) {
2096 memset(&extra, 0, sizeof(extra));
2097 extra.mode = local->oper_hw_mode;
2098
2099 rate = rate_control_get_rate(local, local->mdev, skb, &extra);
2100 if (!rate) {
2101 if (net_ratelimit()) {
2102 printk(KERN_DEBUG "%s: ieee80211_beacon_get: no rate "
2103 "found\n", local->mdev->name);
2104 }
2105 dev_kfree_skb(skb);
2106 return NULL;
2107 }
2108
2109 control->tx_rate = (local->short_preamble &&
2110 (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2111 rate->val2 : rate->val;
2112 control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2113 control->power_level = local->hw.conf.power_level;
2114 control->flags |= IEEE80211_TXCTL_NO_ACK;
2115 control->retry_limit = 1;
2116 control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK;
2117 }
2118
2119 ap->num_beacons++;
2120 return skb;
2121}
2122EXPORT_SYMBOL(ieee80211_beacon_get);
2123
2124__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
2125 size_t frame_len,
2126 const struct ieee80211_tx_control *frame_txctl)
2127{
2128 struct ieee80211_local *local = hw_to_local(hw);
2129 struct ieee80211_rate *rate;
2130 int short_preamble = local->short_preamble;
2131 int erp;
2132 u16 dur;
2133
2134 rate = frame_txctl->rts_rate;
2135 erp = !!(rate->flags & IEEE80211_RATE_ERP);
2136
2137 /* CTS duration */
2138 dur = ieee80211_frame_duration(local, 10, rate->rate,
2139 erp, short_preamble);
2140 /* Data frame duration */
2141 dur += ieee80211_frame_duration(local, frame_len, rate->rate,
2142 erp, short_preamble);
2143 /* ACK duration */
2144 dur += ieee80211_frame_duration(local, 10, rate->rate,
2145 erp, short_preamble);
2146
2147 return cpu_to_le16(dur);
2148}
2149EXPORT_SYMBOL(ieee80211_rts_duration);
2150
2151
2152__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
2153 size_t frame_len,
2154 const struct ieee80211_tx_control *frame_txctl)
2155{
2156 struct ieee80211_local *local = hw_to_local(hw);
2157 struct ieee80211_rate *rate;
2158 int short_preamble = local->short_preamble;
2159 int erp;
2160 u16 dur;
2161
2162 rate = frame_txctl->rts_rate;
2163 erp = !!(rate->flags & IEEE80211_RATE_ERP);
2164
2165 /* Data frame duration */
2166 dur = ieee80211_frame_duration(local, frame_len, rate->rate,
2167 erp, short_preamble);
2168 if (!(frame_txctl->flags & IEEE80211_TXCTL_NO_ACK)) {
2169 /* ACK duration */
2170 dur += ieee80211_frame_duration(local, 10, rate->rate,
2171 erp, short_preamble);
2172 }
2173
2174 return cpu_to_le16(dur);
2175}
2176EXPORT_SYMBOL(ieee80211_ctstoself_duration);
2177
2178void ieee80211_rts_get(struct ieee80211_hw *hw,
2179 const void *frame, size_t frame_len,
2180 const struct ieee80211_tx_control *frame_txctl,
2181 struct ieee80211_rts *rts)
2182{
2183 const struct ieee80211_hdr *hdr = frame;
2184 u16 fctl;
2185
2186 fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS;
2187 rts->frame_control = cpu_to_le16(fctl);
2188 rts->duration = ieee80211_rts_duration(hw, frame_len, frame_txctl);
2189 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
2190 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
2191}
2192EXPORT_SYMBOL(ieee80211_rts_get);
2193
2194void ieee80211_ctstoself_get(struct ieee80211_hw *hw,
2195 const void *frame, size_t frame_len,
2196 const struct ieee80211_tx_control *frame_txctl,
2197 struct ieee80211_cts *cts)
2198{
2199 const struct ieee80211_hdr *hdr = frame;
2200 u16 fctl;
2201
2202 fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS;
2203 cts->frame_control = cpu_to_le16(fctl);
2204 cts->duration = ieee80211_ctstoself_duration(hw, frame_len, frame_txctl);
2205 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
2206}
2207EXPORT_SYMBOL(ieee80211_ctstoself_get);
2208
2209struct sk_buff *
2210ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id,
2211 struct ieee80211_tx_control *control)
2212{
2213 struct ieee80211_local *local = hw_to_local(hw);
2214 struct sk_buff *skb;
2215 struct sta_info *sta;
2216 ieee80211_tx_handler *handler;
2217 struct ieee80211_txrx_data tx;
2218 ieee80211_txrx_result res = TXRX_DROP;
2219 struct net_device *bdev;
2220 struct ieee80211_sub_if_data *sdata;
2221 struct ieee80211_if_ap *bss = NULL;
2222
2223 bdev = dev_get_by_index(if_id);
2224 if (bdev) {
2225 sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
2226 bss = &sdata->u.ap;
2227 dev_put(bdev);
2228 }
2229 if (!bss || sdata->type != IEEE80211_IF_TYPE_AP || !bss->beacon_head)
2230 return NULL;
2231
2232 if (bss->dtim_count != 0)
2233 return NULL; /* send buffered bc/mc only after DTIM beacon */
2234 memset(control, 0, sizeof(*control));
2235 while (1) {
2236 skb = skb_dequeue(&bss->ps_bc_buf);
2237 if (!skb)
2238 return NULL;
2239 local->total_ps_buffered--;
2240
2241 if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) {
2242 struct ieee80211_hdr *hdr =
2243 (struct ieee80211_hdr *) skb->data;
2244 /* more buffered multicast/broadcast frames ==> set
2245 * MoreData flag in IEEE 802.11 header to inform PS
2246 * STAs */
2247 hdr->frame_control |=
2248 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2249 }
2250
2251 if (ieee80211_tx_prepare(&tx, skb, local->mdev, control) == 0)
2252 break;
2253 dev_kfree_skb_any(skb);
2254 }
2255 sta = tx.sta;
2256 tx.u.tx.ps_buffered = 1;
2257
2258 for (handler = local->tx_handlers; *handler != NULL; handler++) {
2259 res = (*handler)(&tx);
2260 if (res == TXRX_DROP || res == TXRX_QUEUED)
2261 break;
2262 }
2263 dev_put(tx.dev);
2264 skb = tx.skb; /* handlers are allowed to change skb */
2265
2266 if (res == TXRX_DROP) {
2267 I802_DEBUG_INC(local->tx_handlers_drop);
2268 dev_kfree_skb(skb);
2269 skb = NULL;
2270 } else if (res == TXRX_QUEUED) {
2271 I802_DEBUG_INC(local->tx_handlers_queued);
2272 skb = NULL;
2273 }
2274
2275 if (sta)
2276 sta_info_put(sta);
2277
2278 return skb;
2279}
2280EXPORT_SYMBOL(ieee80211_get_buffered_bc);
2281
2282static int __ieee80211_if_config(struct net_device *dev,
2283 struct sk_buff *beacon,
2284 struct ieee80211_tx_control *control)
2285{
2286 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2287 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2288 struct ieee80211_if_conf conf;
2289 static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
2290
2291 if (!local->ops->config_interface || !netif_running(dev))
2292 return 0;
2293
2294 memset(&conf, 0, sizeof(conf));
2295 conf.type = sdata->type;
2296 if (sdata->type == IEEE80211_IF_TYPE_STA ||
2297 sdata->type == IEEE80211_IF_TYPE_IBSS) {
2298 if (local->sta_scanning &&
2299 local->scan_dev == dev)
2300 conf.bssid = scan_bssid;
2301 else
2302 conf.bssid = sdata->u.sta.bssid;
2303 conf.ssid = sdata->u.sta.ssid;
2304 conf.ssid_len = sdata->u.sta.ssid_len;
2305 conf.generic_elem = sdata->u.sta.extra_ie;
2306 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
2307 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
2308 conf.ssid = sdata->u.ap.ssid;
2309 conf.ssid_len = sdata->u.ap.ssid_len;
2310 conf.generic_elem = sdata->u.ap.generic_elem;
2311 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
2312 conf.beacon = beacon;
2313 conf.beacon_control = control;
2314 }
2315 return local->ops->config_interface(local_to_hw(local),
2316 dev->ifindex, &conf);
2317}
2318
2319int ieee80211_if_config(struct net_device *dev)
2320{
2321 return __ieee80211_if_config(dev, NULL, NULL);
2322}
2323
2324int ieee80211_if_config_beacon(struct net_device *dev)
2325{
2326 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2327 struct ieee80211_tx_control control;
2328 struct sk_buff *skb;
2329
2330 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
2331 return 0;
2332 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
2333 if (!skb)
2334 return -ENOMEM;
2335 return __ieee80211_if_config(dev, skb, &control);
2336}
2337
2338int ieee80211_hw_config(struct ieee80211_local *local)
2339{
2340 struct ieee80211_hw_mode *mode;
2341 struct ieee80211_channel *chan;
2342 int ret = 0;
2343
2344 if (local->sta_scanning) {
2345 chan = local->scan_channel;
2346 mode = local->scan_hw_mode;
2347 } else {
2348 chan = local->oper_channel;
2349 mode = local->oper_hw_mode;
2350 }
2351
2352 local->hw.conf.channel = chan->chan;
2353 local->hw.conf.channel_val = chan->val;
2354 local->hw.conf.power_level = chan->power_level;
2355 local->hw.conf.freq = chan->freq;
2356 local->hw.conf.phymode = mode->mode;
2357 local->hw.conf.antenna_max = chan->antenna_max;
2358 local->hw.conf.chan = chan;
2359 local->hw.conf.mode = mode;
2360
2361#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2362 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
2363 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
2364 local->hw.conf.phymode);
2365#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
2366
2367 if (local->ops->config)
2368 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
2369
2370 return ret;
2371}
2372
2373
2374static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
2375{
2376 /* FIX: what would be proper limits for MTU?
2377 * This interface uses 802.3 frames. */
2378 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
2379 printk(KERN_WARNING "%s: invalid MTU %d\n",
2380 dev->name, new_mtu);
2381 return -EINVAL;
2382 }
2383
2384#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2385 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
2386#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
2387 dev->mtu = new_mtu;
2388 return 0;
2389}
2390
2391
2392static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
2393{
2394 /* FIX: what would be proper limits for MTU?
2395 * This interface uses 802.11 frames. */
2396 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
2397 printk(KERN_WARNING "%s: invalid MTU %d\n",
2398 dev->name, new_mtu);
2399 return -EINVAL;
2400 }
2401
2402#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2403 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
2404#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
2405 dev->mtu = new_mtu;
2406 return 0;
2407}
2408
2409enum netif_tx_lock_class {
2410 TX_LOCK_NORMAL,
2411 TX_LOCK_MASTER,
2412};
2413
2414static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
2415{
2416 spin_lock_nested(&dev->_xmit_lock, subclass);
2417 dev->xmit_lock_owner = smp_processor_id();
2418}
2419
2420static void ieee80211_set_multicast_list(struct net_device *dev)
2421{
2422 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2423 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2424 unsigned short flags;
2425
2426 netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
2427 if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) {
2428 if (sdata->allmulti) {
2429 sdata->allmulti = 0;
2430 local->iff_allmultis--;
2431 } else {
2432 sdata->allmulti = 1;
2433 local->iff_allmultis++;
2434 }
2435 }
2436 if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) {
2437 if (sdata->promisc) {
2438 sdata->promisc = 0;
2439 local->iff_promiscs--;
2440 } else {
2441 sdata->promisc = 1;
2442 local->iff_promiscs++;
2443 }
2444 }
2445 if (dev->mc_count != sdata->mc_count) {
2446 local->mc_count = local->mc_count - sdata->mc_count +
2447 dev->mc_count;
2448 sdata->mc_count = dev->mc_count;
2449 }
2450 if (local->ops->set_multicast_list) {
2451 flags = local->mdev->flags;
2452 if (local->iff_allmultis)
2453 flags |= IFF_ALLMULTI;
2454 if (local->iff_promiscs)
2455 flags |= IFF_PROMISC;
2456 read_lock(&local->sub_if_lock);
2457 local->ops->set_multicast_list(local_to_hw(local), flags,
2458 local->mc_count);
2459 read_unlock(&local->sub_if_lock);
2460 }
2461 netif_tx_unlock(local->mdev);
2462}
2463
2464struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
2465 struct dev_mc_list *prev,
2466 void **ptr)
2467{
2468 struct ieee80211_local *local = hw_to_local(hw);
2469 struct ieee80211_sub_if_data *sdata = *ptr;
2470 struct dev_mc_list *mc;
2471
2472 if (!prev) {
2473 WARN_ON(sdata);
2474 sdata = NULL;
2475 }
2476 if (!prev || !prev->next) {
2477 if (sdata)
2478 sdata = list_entry(sdata->list.next,
2479 struct ieee80211_sub_if_data, list);
2480 else
2481 sdata = list_entry(local->sub_if_list.next,
2482 struct ieee80211_sub_if_data, list);
2483 if (&sdata->list != &local->sub_if_list)
2484 mc = sdata->dev->mc_list;
2485 else
2486 mc = NULL;
2487 } else
2488 mc = prev->next;
2489
2490 *ptr = sdata;
2491 return mc;
2492}
2493EXPORT_SYMBOL(ieee80211_get_mc_list_item);
2494
2495static struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
2496{
2497 struct ieee80211_sub_if_data *sdata;
2498 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2499 return &(sdata->stats);
2500}
2501
2502static void ieee80211_if_shutdown(struct net_device *dev)
2503{
2504 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2505 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2506
2507 ASSERT_RTNL();
2508 switch (sdata->type) {
2509 case IEEE80211_IF_TYPE_STA:
2510 case IEEE80211_IF_TYPE_IBSS:
2511 sdata->u.sta.state = IEEE80211_DISABLED;
2512 del_timer_sync(&sdata->u.sta.timer);
2513 skb_queue_purge(&sdata->u.sta.skb_queue);
2514 if (!local->ops->hw_scan &&
2515 local->scan_dev == sdata->dev) {
2516 local->sta_scanning = 0;
2517 cancel_delayed_work(&local->scan_work);
2518 }
2519 flush_workqueue(local->hw.workqueue);
2520 break;
2521 }
2522}
2523
2524static inline int identical_mac_addr_allowed(int type1, int type2)
2525{
2526 return (type1 == IEEE80211_IF_TYPE_MNTR ||
2527 type2 == IEEE80211_IF_TYPE_MNTR ||
2528 (type1 == IEEE80211_IF_TYPE_AP &&
2529 type2 == IEEE80211_IF_TYPE_WDS) ||
2530 (type1 == IEEE80211_IF_TYPE_WDS &&
2531 (type2 == IEEE80211_IF_TYPE_WDS ||
2532 type2 == IEEE80211_IF_TYPE_AP)) ||
2533 (type1 == IEEE80211_IF_TYPE_AP &&
2534 type2 == IEEE80211_IF_TYPE_VLAN) ||
2535 (type1 == IEEE80211_IF_TYPE_VLAN &&
2536 (type2 == IEEE80211_IF_TYPE_AP ||
2537 type2 == IEEE80211_IF_TYPE_VLAN)));
2538}
2539
2540static int ieee80211_master_open(struct net_device *dev)
2541{
2542 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2543 struct ieee80211_sub_if_data *sdata;
2544 int res = -EOPNOTSUPP;
2545
2546 read_lock(&local->sub_if_lock);
2547 list_for_each_entry(sdata, &local->sub_if_list, list) {
2548 if (sdata->dev != dev && netif_running(sdata->dev)) {
2549 res = 0;
2550 break;
2551 }
2552 }
2553 read_unlock(&local->sub_if_lock);
2554 return res;
2555}
2556
2557static int ieee80211_master_stop(struct net_device *dev)
2558{
2559 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2560 struct ieee80211_sub_if_data *sdata;
2561
2562 read_lock(&local->sub_if_lock);
2563 list_for_each_entry(sdata, &local->sub_if_list, list)
2564 if (sdata->dev != dev && netif_running(sdata->dev))
2565 dev_close(sdata->dev);
2566 read_unlock(&local->sub_if_lock);
2567
2568 return 0;
2569}
2570
2571static int ieee80211_mgmt_open(struct net_device *dev)
2572{
2573 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2574
2575 if (!netif_running(local->mdev))
2576 return -EOPNOTSUPP;
2577 return 0;
2578}
2579
2580static int ieee80211_mgmt_stop(struct net_device *dev)
2581{
2582 return 0;
2583}
2584
2585/* Check if running monitor interfaces should go to a "soft monitor" mode
2586 * and switch them if necessary. */
2587static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
2588{
2589 struct ieee80211_if_init_conf conf;
2590
2591 if (local->open_count && local->open_count == local->monitors &&
2592 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
2593 local->ops->remove_interface) {
2594 conf.if_id = -1;
2595 conf.type = IEEE80211_IF_TYPE_MNTR;
2596 conf.mac_addr = NULL;
2597 local->ops->remove_interface(local_to_hw(local), &conf);
2598 }
2599}
2600
2601/* Check if running monitor interfaces should go to a "hard monitor" mode
2602 * and switch them if necessary. */
2603static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
2604{
2605 struct ieee80211_if_init_conf conf;
2606
2607 if (local->open_count && local->open_count == local->monitors &&
4480f15c 2608 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
f0706e82
JB		 2609 conf.if_id = -1;
2610 conf.type = IEEE80211_IF_TYPE_MNTR;
2611 conf.mac_addr = NULL;
2612 local->ops->add_interface(local_to_hw(local), &conf);
2613 }
2614}
2615
2616static int ieee80211_open(struct net_device *dev)
2617{
2618 struct ieee80211_sub_if_data *sdata, *nsdata;
2619 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2620 struct ieee80211_if_init_conf conf;
2621 int res;
2622
2623 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2624 read_lock(&local->sub_if_lock);
2625 list_for_each_entry(nsdata, &local->sub_if_list, list) {
2626 struct net_device *ndev = nsdata->dev;
2627
2628 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
2629 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
2630 !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
2631 read_unlock(&local->sub_if_lock);
2632 return -ENOTUNIQ;
2633 }
2634 }
2635 read_unlock(&local->sub_if_lock);
2636
2637 if (sdata->type == IEEE80211_IF_TYPE_WDS &&
2638 is_zero_ether_addr(sdata->u.wds.remote_addr))
2639 return -ENOLINK;
2640
2641 if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
2642 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
2643 /* run the interface in a "soft monitor" mode */
2644 local->monitors++;
2645 local->open_count++;
2646 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
2647 return 0;
2648 }
2649 ieee80211_start_soft_monitor(local);
2650
4480f15c
JB		 2651 conf.if_id = dev->ifindex;
2652 conf.type = sdata->type;
2653 conf.mac_addr = dev->dev_addr;
2654 res = local->ops->add_interface(local_to_hw(local), &conf);
2655 if (res) {
2656 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
2657 ieee80211_start_hard_monitor(local);
2658 return res;
f0706e82
JB		 2659 }
2660
2661 if (local->open_count == 0) {
2662 res = 0;
2663 tasklet_enable(&local->tx_pending_tasklet);
2664 tasklet_enable(&local->tasklet);
2665 if (local->ops->open)
2666 res = local->ops->open(local_to_hw(local));
2667 if (res == 0) {
2668 res = dev_open(local->mdev);
2669 if (res) {
2670 if (local->ops->stop)
2671 local->ops->stop(local_to_hw(local));
2672 } else {
2673 res = ieee80211_hw_config(local);
2674 if (res && local->ops->stop)
2675 local->ops->stop(local_to_hw(local));
2676 else if (!res && local->apdev)
2677 dev_open(local->apdev);
2678 }
2679 }
2680 if (res) {
2681 if (local->ops->remove_interface)
2682 local->ops->remove_interface(local_to_hw(local),
2683 &conf);
2684 return res;
2685 }
2686 }
2687 local->open_count++;
2688
2689 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
2690 local->monitors++;
2691 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
2692 } else
2693 ieee80211_if_config(dev);
2694
2695 if (sdata->type == IEEE80211_IF_TYPE_STA &&
2696 !local->user_space_mlme)
2697 netif_carrier_off(dev);
52fb24cd
MW		 2698 else
2699 netif_carrier_on(dev);
f0706e82
JB		 2700
2701 netif_start_queue(dev);
2702 return 0;
2703}
2704
2705
2706static int ieee80211_stop(struct net_device *dev)
2707{
2708 struct ieee80211_sub_if_data *sdata;
2709 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2710
2711 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2712
2713 if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
2714 local->open_count > 1 &&
2715 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
2716 /* remove "soft monitor" interface */
2717 local->open_count--;
2718 local->monitors--;
2719 if (!local->monitors)
2720 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
2721 return 0;
2722 }
2723
2724 netif_stop_queue(dev);
2725 ieee80211_if_shutdown(dev);
2726
2727 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
2728 local->monitors--;
2729 if (!local->monitors)
2730 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
2731 }
2732
2733 local->open_count--;
2734 if (local->open_count == 0) {
2735 if (netif_running(local->mdev))
2736 dev_close(local->mdev);
2737 if (local->apdev)
2738 dev_close(local->apdev);
2739 if (local->ops->stop)
2740 local->ops->stop(local_to_hw(local));
2741 tasklet_disable(&local->tx_pending_tasklet);
2742 tasklet_disable(&local->tasklet);
2743 }
2744 if (local->ops->remove_interface) {
2745 struct ieee80211_if_init_conf conf;
2746
2747 conf.if_id = dev->ifindex;
2748 conf.type = sdata->type;
2749 conf.mac_addr = dev->dev_addr;
2750 local->ops->remove_interface(local_to_hw(local), &conf);
2751 }
2752
2753 ieee80211_start_hard_monitor(local);
2754
2755 return 0;
2756}
2757
2758
2759static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
2760{
2761 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
2762 return ETH_ALEN;
2763}
2764
2765static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
2766{
2767 return compare_ether_addr(raddr, addr) == 0 ||
2768 is_broadcast_ether_addr(raddr);
2769}
2770
2771
2772static ieee80211_txrx_result
2773ieee80211_rx_h_data(struct ieee80211_txrx_data *rx)
2774{
2775 struct net_device *dev = rx->dev;
2776 struct ieee80211_local *local = rx->local;
2777 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
2778 u16 fc, hdrlen, ethertype;
2779 u8 *payload;
2780 u8 dst[ETH_ALEN];
2781 u8 src[ETH_ALEN];
2782 struct sk_buff *skb = rx->skb, *skb2;
2783 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2784
2785 fc = rx->fc;
2786 if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA))
2787 return TXRX_CONTINUE;
2788
2789 if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
2790 return TXRX_DROP;
2791
2792 hdrlen = ieee80211_get_hdrlen(fc);
2793
2794 /* convert IEEE 802.11 header + possible LLC headers into Ethernet
2795 * header
2796 * IEEE 802.11 address fields:
2797 * ToDS FromDS Addr1 Addr2 Addr3 Addr4
2798 * 0 0 DA SA BSSID n/a
2799 * 0 1 DA BSSID SA n/a
2800 * 1 0 BSSID SA DA n/a
2801 * 1 1 RA TA DA SA
2802 */
2803
2804 switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
2805 case IEEE80211_FCTL_TODS:
2806 /* BSSID SA DA */
2807 memcpy(dst, hdr->addr3, ETH_ALEN);
2808 memcpy(src, hdr->addr2, ETH_ALEN);
2809
2810 if (unlikely(sdata->type != IEEE80211_IF_TYPE_AP &&
2811 sdata->type != IEEE80211_IF_TYPE_VLAN)) {
2812 printk(KERN_DEBUG "%s: dropped ToDS frame (BSSID="
2813 MAC_FMT " SA=" MAC_FMT " DA=" MAC_FMT ")\n",
2814 dev->name, MAC_ARG(hdr->addr1),
2815 MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3));
2816 return TXRX_DROP;
2817 }
2818 break;
2819 case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
2820 /* RA TA DA SA */
2821 memcpy(dst, hdr->addr3, ETH_ALEN);
2822 memcpy(src, hdr->addr4, ETH_ALEN);
2823
2824 if (unlikely(sdata->type != IEEE80211_IF_TYPE_WDS)) {
2825 printk(KERN_DEBUG "%s: dropped FromDS&ToDS frame (RA="
2826 MAC_FMT " TA=" MAC_FMT " DA=" MAC_FMT " SA="
2827 MAC_FMT ")\n",
2828 rx->dev->name, MAC_ARG(hdr->addr1),
2829 MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3),
2830 MAC_ARG(hdr->addr4));
2831 return TXRX_DROP;
2832 }
2833 break;
2834 case IEEE80211_FCTL_FROMDS:
2835 /* DA BSSID SA */
2836 memcpy(dst, hdr->addr1, ETH_ALEN);
2837 memcpy(src, hdr->addr3, ETH_ALEN);
2838
2839 if (sdata->type != IEEE80211_IF_TYPE_STA) {
2840 return TXRX_DROP;
2841 }
2842 break;
2843 case 0:
2844 /* DA SA BSSID */
2845 memcpy(dst, hdr->addr1, ETH_ALEN);
2846 memcpy(src, hdr->addr2, ETH_ALEN);
2847
2848 if (sdata->type != IEEE80211_IF_TYPE_IBSS) {
2849 if (net_ratelimit()) {
2850 printk(KERN_DEBUG "%s: dropped IBSS frame (DA="
2851 MAC_FMT " SA=" MAC_FMT " BSSID=" MAC_FMT
2852 ")\n",
2853 dev->name, MAC_ARG(hdr->addr1),
2854 MAC_ARG(hdr->addr2),
2855 MAC_ARG(hdr->addr3));
2856 }
2857 return TXRX_DROP;
2858 }
2859 break;
2860 }
2861
2862 payload = skb->data + hdrlen;
2863
2864 if (unlikely(skb->len - hdrlen < 8)) {
2865 if (net_ratelimit()) {
2866 printk(KERN_DEBUG "%s: RX too short data frame "
2867 "payload\n", dev->name);
2868 }
2869 return TXRX_DROP;
2870 }
2871
2872 ethertype = (payload[6] << 8) | payload[7];
2873
2874 if (likely((compare_ether_addr(payload, rfc1042_header) == 0 &&
2875 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
2876 compare_ether_addr(payload, bridge_tunnel_header) == 0)) {
2877 /* remove RFC1042 or Bridge-Tunnel encapsulation and
2878 * replace EtherType */
2879 skb_pull(skb, hdrlen + 6);
2880 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
2881 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
2882 } else {
2883 struct ethhdr *ehdr;
2884 __be16 len;
2885 skb_pull(skb, hdrlen);
2886 len = htons(skb->len);
2887 ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr));
2888 memcpy(ehdr->h_dest, dst, ETH_ALEN);
2889 memcpy(ehdr->h_source, src, ETH_ALEN);
2890 ehdr->h_proto = len;
2891 }
2892 skb->dev = dev;
2893
2894 skb2 = NULL;
2895
2896 sdata->stats.rx_packets++;
2897 sdata->stats.rx_bytes += skb->len;
2898
2899 if (local->bridge_packets && (sdata->type == IEEE80211_IF_TYPE_AP
2900 || sdata->type == IEEE80211_IF_TYPE_VLAN) && rx->u.rx.ra_match) {
2901 if (is_multicast_ether_addr(skb->data)) {
2902 /* send multicast frames both to higher layers in
2903 * local net stack and back to the wireless media */
2904 skb2 = skb_copy(skb, GFP_ATOMIC);
2905 if (!skb2)
2906 printk(KERN_DEBUG "%s: failed to clone "
2907 "multicast frame\n", dev->name);
2908 } else {
2909 struct sta_info *dsta;
2910 dsta = sta_info_get(local, skb->data);
2911 if (dsta && !dsta->dev) {
2912 printk(KERN_DEBUG "Station with null dev "
2913 "structure!\n");
2914 } else if (dsta && dsta->dev == dev) {
2915 /* Destination station is associated to this
2916 * AP, so send the frame directly to it and
2917 * do not pass the frame to local net stack.
2918 */
2919 skb2 = skb;
2920 skb = NULL;
2921 }
2922 if (dsta)
2923 sta_info_put(dsta);
2924 }
2925 }
2926
2927 if (skb) {
2928 /* deliver to local stack */
2929 skb->protocol = eth_type_trans(skb, dev);
2930 memset(skb->cb, 0, sizeof(skb->cb));
2931 netif_rx(skb);
2932 }
2933
2934 if (skb2) {
2935 /* send to wireless media */
2936 skb2->protocol = __constant_htons(ETH_P_802_3);
2937 skb_set_network_header(skb2, 0);
2938 skb_set_mac_header(skb2, 0);
2939 dev_queue_xmit(skb2);
2940 }
2941
2942 return TXRX_QUEUED;
2943}
2944
2945
2946static struct ieee80211_rate *
2947ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate)
2948{
2949 struct ieee80211_hw_mode *mode;
2950 int r;
2951
2952 list_for_each_entry(mode, &local->modes_list, list) {
2953 if (mode->mode != phymode)
2954 continue;
2955 for (r = 0; r < mode->num_rates; r++) {
2956 struct ieee80211_rate *rate = &mode->rates[r];
2957 if (rate->val == hw_rate ||
2958 (rate->flags & IEEE80211_RATE_PREAMBLE2 &&
2959 rate->val2 == hw_rate))
2960 return rate;
2961 }
2962 }
2963
2964 return NULL;
2965}
2966
2967static void
2968ieee80211_fill_frame_info(struct ieee80211_local *local,
2969 struct ieee80211_frame_info *fi,
2970 struct ieee80211_rx_status *status)
2971{
2972 if (status) {
2973 struct timespec ts;
2974 struct ieee80211_rate *rate;
2975
2976 jiffies_to_timespec(jiffies, &ts);
2977 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
2978 ts.tv_nsec / 1000);
2979 fi->mactime = cpu_to_be64(status->mactime);
2980 switch (status->phymode) {
2981 case MODE_IEEE80211A:
2982 fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
2983 break;
2984 case MODE_IEEE80211B:
2985 fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
2986 break;
2987 case MODE_IEEE80211G:
2988 fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
2989 break;
2990 case MODE_ATHEROS_TURBO:
2991 fi->phytype =
2992 htonl(ieee80211_phytype_dsss_dot11_turbo);
2993 break;
2994 default:
2995 fi->phytype = htonl(0xAAAAAAAA);
2996 break;
2997 }
2998 fi->channel = htonl(status->channel);
2999 rate = ieee80211_get_rate(local, status->phymode,
3000 status->rate);
3001 if (rate) {
3002 fi->datarate = htonl(rate->rate);
3003 if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
3004 if (status->rate == rate->val)
3005 fi->preamble = htonl(2); /* long */
3006 else if (status->rate == rate->val2)
3007 fi->preamble = htonl(1); /* short */
3008 } else
3009 fi->preamble = htonl(0);
3010 } else {
3011 fi->datarate = htonl(0);
3012 fi->preamble = htonl(0);
3013 }
3014
3015 fi->antenna = htonl(status->antenna);
3016 fi->priority = htonl(0xffffffff); /* no clue */
3017 fi->ssi_type = htonl(ieee80211_ssi_raw);
3018 fi->ssi_signal = htonl(status->ssi);
3019 fi->ssi_noise = 0x00000000;
3020 fi->encoding = 0;
3021 } else {
3022 /* clear everything because we really don't know.
3023 * the msg_type field isn't present on monitor frames
3024 * so we don't know whether it will be present or not,
3025 * but it's ok to not clear it since it'll be assigned
3026 * anyway */
3027 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
3028
3029 fi->ssi_type = htonl(ieee80211_ssi_none);
3030 }
3031 fi->version = htonl(IEEE80211_FI_VERSION);
3032 fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
3033}
3034
3035/* this routine is actually not just for this, but also
3036 * for pushing fake 'management' frames into userspace.
3037 * it shall be replaced by a netlink-based system. */
3038void
3039ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
3040 struct ieee80211_rx_status *status, u32 msg_type)
3041{
3042 struct ieee80211_frame_info *fi;
3043 const size_t hlen = sizeof(struct ieee80211_frame_info);
3044 struct ieee80211_sub_if_data *sdata;
3045
3046 skb->dev = local->apdev;
3047
3048 sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
3049
3050 if (skb_headroom(skb) < hlen) {
3051 I802_DEBUG_INC(local->rx_expand_skb_head);
3052 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
3053 dev_kfree_skb(skb);
3054 return;
3055 }
3056 }
3057
3058 fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
3059
3060 ieee80211_fill_frame_info(local, fi, status);
3061 fi->msg_type = htonl(msg_type);
3062
3063 sdata->stats.rx_packets++;
3064 sdata->stats.rx_bytes += skb->len;
3065
3066 skb_set_mac_header(skb, 0);
3067 skb->ip_summed = CHECKSUM_UNNECESSARY;
3068 skb->pkt_type = PACKET_OTHERHOST;
3069 skb->protocol = htons(ETH_P_802_2);
3070 memset(skb->cb, 0, sizeof(skb->cb));
3071 netif_rx(skb);
3072}
3073
3074static void
3075ieee80211_rx_monitor(struct net_device *dev, struct sk_buff *skb,
3076 struct ieee80211_rx_status *status)
3077{
3078 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3079 struct ieee80211_sub_if_data *sdata;
3080 struct ieee80211_rate *rate;
3081 struct ieee80211_rtap_hdr {
3082 struct ieee80211_radiotap_header hdr;
3083 u8 flags;
3084 u8 rate;
3085 __le16 chan_freq;
3086 __le16 chan_flags;
3087 u8 antsignal;
3088 } __attribute__ ((packed)) *rthdr;
3089
3090 skb->dev = dev;
3091
3092 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3093
3094 if (status->flag & RX_FLAG_RADIOTAP)
3095 goto out;
3096
3097 if (skb_headroom(skb) < sizeof(*rthdr)) {
3098 I802_DEBUG_INC(local->rx_expand_skb_head);
3099 if (pskb_expand_head(skb, sizeof(*rthdr), 0, GFP_ATOMIC)) {
3100 dev_kfree_skb(skb);
3101 return;
3102 }
3103 }
3104
3105 rthdr = (struct ieee80211_rtap_hdr *) skb_push(skb, sizeof(*rthdr));
3106 memset(rthdr, 0, sizeof(*rthdr));
3107 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
3108 rthdr->hdr.it_present =
3109 cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
3110 (1 << IEEE80211_RADIOTAP_RATE) |
3111 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3112 (1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL));
3113 rthdr->flags = local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS ?
3114 IEEE80211_RADIOTAP_F_FCS : 0;
3115 rate = ieee80211_get_rate(local, status->phymode, status->rate);
3116 if (rate)
3117 rthdr->rate = rate->rate / 5;
3118 rthdr->chan_freq = cpu_to_le16(status->freq);
3119 rthdr->chan_flags =
3120 status->phymode == MODE_IEEE80211A ?
3121 cpu_to_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ) :
3122 cpu_to_le16(IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ);
3123 rthdr->antsignal = status->ssi;
3124
3125 out:
3126 sdata->stats.rx_packets++;
3127 sdata->stats.rx_bytes += skb->len;
3128
3129 skb_set_mac_header(skb, 0);
3130 skb->ip_summed = CHECKSUM_UNNECESSARY;
3131 skb->pkt_type = PACKET_OTHERHOST;
3132 skb->protocol = htons(ETH_P_802_2);
3133 memset(skb->cb, 0, sizeof(skb->cb));
3134 netif_rx(skb);
3135}
3136
3137int ieee80211_radar_status(struct ieee80211_hw *hw, int channel,
3138 int radar, int radar_type)
3139{
3140 struct sk_buff *skb;
3141 struct ieee80211_radar_info *msg;
3142 struct ieee80211_local *local = hw_to_local(hw);
3143
3144 if (!local->apdev)
3145 return 0;
3146
3147 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
3148 sizeof(struct ieee80211_radar_info));
3149
3150 if (!skb)
3151 return -ENOMEM;
3152 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
3153
3154 msg = (struct ieee80211_radar_info *)
3155 skb_put(skb, sizeof(struct ieee80211_radar_info));
3156 msg->channel = channel;
3157 msg->radar = radar;
3158 msg->radar_type = radar_type;
3159
3160 ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar);
3161 return 0;
3162}
3163EXPORT_SYMBOL(ieee80211_radar_status);
3164
f0706e82
JB		 3165
3166static void ap_sta_ps_start(struct net_device *dev, struct sta_info *sta)
3167{
3168 struct ieee80211_sub_if_data *sdata;
3169 sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev);
3170
3171 if (sdata->bss)
3172 atomic_inc(&sdata->bss->num_sta_ps);
3173 sta->flags |= WLAN_STA_PS;
3174 sta->pspoll = 0;
3175#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
3176 printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d enters power "
3177 "save mode\n", dev->name, MAC_ARG(sta->addr), sta->aid);
3178#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
3179}
3180
3181
3182static int ap_sta_ps_end(struct net_device *dev, struct sta_info *sta)
3183{
3184 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3185 struct sk_buff *skb;
3186 int sent = 0;
3187 struct ieee80211_sub_if_data *sdata;
3188 struct ieee80211_tx_packet_data *pkt_data;
3189
3190 sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev);
3191 if (sdata->bss)
3192 atomic_dec(&sdata->bss->num_sta_ps);
3193 sta->flags &= ~(WLAN_STA_PS | WLAN_STA_TIM);
3194 sta->pspoll = 0;
3195 if (!skb_queue_empty(&sta->ps_tx_buf)) {
3196 if (local->ops->set_tim)
3197 local->ops->set_tim(local_to_hw(local), sta->aid, 0);
3198 if (sdata->bss)
3199 bss_tim_clear(local, sdata->bss, sta->aid);
3200 }
3201#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
3202 printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d exits power "
3203 "save mode\n", dev->name, MAC_ARG(sta->addr), sta->aid);
3204#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
3205 /* Send all buffered frames to the station */
3206 while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) {
3207 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
3208 sent++;
3209 pkt_data->requeue = 1;
3210 dev_queue_xmit(skb);
3211 }
3212 while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) {
3213 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
3214 local->total_ps_buffered--;
3215 sent++;
3216#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
3217 printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d send PS frame "
3218 "since STA not sleeping anymore\n", dev->name,
3219 MAC_ARG(sta->addr), sta->aid);
3220#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
3221 pkt_data->requeue = 1;
3222 dev_queue_xmit(skb);
3223 }
3224
3225 return sent;
3226}
3227
3228
3229static ieee80211_txrx_result
3230ieee80211_rx_h_ps_poll(struct ieee80211_txrx_data *rx)
3231{
3232 struct sk_buff *skb;
3233 int no_pending_pkts;
3234
3235 if (likely(!rx->sta ||
3236 (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL ||
3237 (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PSPOLL ||
3238 !rx->u.rx.ra_match))
3239 return TXRX_CONTINUE;
3240
3241 skb = skb_dequeue(&rx->sta->tx_filtered);
3242 if (!skb) {
3243 skb = skb_dequeue(&rx->sta->ps_tx_buf);
3244 if (skb)
3245 rx->local->total_ps_buffered--;
3246 }
3247 no_pending_pkts = skb_queue_empty(&rx->sta->tx_filtered) &&
3248 skb_queue_empty(&rx->sta->ps_tx_buf);
3249
3250 if (skb) {
3251 struct ieee80211_hdr *hdr =
3252 (struct ieee80211_hdr *) skb->data;
3253
3254 /* tell TX path to send one frame even though the STA may
3255 * still remain is PS mode after this frame exchange */
3256 rx->sta->pspoll = 1;
3257
3258#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
3259 printk(KERN_DEBUG "STA " MAC_FMT " aid %d: PS Poll (entries "
3260 "after %d)\n",
3261 MAC_ARG(rx->sta->addr), rx->sta->aid,
3262 skb_queue_len(&rx->sta->ps_tx_buf));
3263#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
3264
3265 /* Use MoreData flag to indicate whether there are more
3266 * buffered frames for this STA */
3267 if (no_pending_pkts) {
3268 hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
3269 rx->sta->flags &= ~WLAN_STA_TIM;
3270 } else
3271 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
3272
3273 dev_queue_xmit(skb);
3274
3275 if (no_pending_pkts) {
3276 if (rx->local->ops->set_tim)
3277 rx->local->ops->set_tim(local_to_hw(rx->local),
3278 rx->sta->aid, 0);
3279 if (rx->sdata->bss)
3280 bss_tim_clear(rx->local, rx->sdata->bss, rx->sta->aid);
3281 }
3282#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
3283 } else if (!rx->u.rx.sent_ps_buffered) {
3284 printk(KERN_DEBUG "%s: STA " MAC_FMT " sent PS Poll even "
3285 "though there is no buffered frames for it\n",
3286 rx->dev->name, MAC_ARG(rx->sta->addr));
3287#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
3288
3289 }
3290
3291 /* Free PS Poll skb here instead of returning TXRX_DROP that would
3292 * count as an dropped frame. */
3293 dev_kfree_skb(rx->skb);
3294
3295 return TXRX_QUEUED;
3296}
3297
3298
3299static inline struct ieee80211_fragment_entry *
3300ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata,
3301 unsigned int frag, unsigned int seq, int rx_queue,
3302 struct sk_buff **skb)
3303{
3304 struct ieee80211_fragment_entry *entry;
3305 int idx;
3306
3307 idx = sdata->fragment_next;
3308 entry = &sdata->fragments[sdata->fragment_next++];
3309 if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX)
3310 sdata->fragment_next = 0;
3311
3312 if (!skb_queue_empty(&entry->skb_list)) {
3313#ifdef CONFIG_MAC80211_DEBUG
3314 struct ieee80211_hdr *hdr =
3315 (struct ieee80211_hdr *) entry->skb_list.next->data;
3316 printk(KERN_DEBUG "%s: RX reassembly removed oldest "
3317 "fragment entry (idx=%d age=%lu seq=%d last_frag=%d "
3318 "addr1=" MAC_FMT " addr2=" MAC_FMT "\n",
3319 sdata->dev->name, idx,
3320 jiffies - entry->first_frag_time, entry->seq,
3321 entry->last_frag, MAC_ARG(hdr->addr1),
3322 MAC_ARG(hdr->addr2));
3323#endif /* CONFIG_MAC80211_DEBUG */
3324 __skb_queue_purge(&entry->skb_list);
3325 }
3326
3327 __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */
3328 *skb = NULL;
3329 entry->first_frag_time = jiffies;
3330 entry->seq = seq;
3331 entry->rx_queue = rx_queue;
3332 entry->last_frag = frag;
3333 entry->ccmp = 0;
3334 entry->extra_len = 0;
3335
3336 return entry;
3337}
3338
3339
3340static inline struct ieee80211_fragment_entry *
3341ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata,
3342 u16 fc, unsigned int frag, unsigned int seq,
3343 int rx_queue, struct ieee80211_hdr *hdr)
3344{
3345 struct ieee80211_fragment_entry *entry;
3346 int i, idx;
3347
3348 idx = sdata->fragment_next;
3349 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
3350 struct ieee80211_hdr *f_hdr;
3351 u16 f_fc;
3352
3353 idx--;
3354 if (idx < 0)
3355 idx = IEEE80211_FRAGMENT_MAX - 1;
3356
3357 entry = &sdata->fragments[idx];
3358 if (skb_queue_empty(&entry->skb_list) || entry->seq != seq ||
3359 entry->rx_queue != rx_queue ||
3360 entry->last_frag + 1 != frag)
3361 continue;
3362
3363 f_hdr = (struct ieee80211_hdr *) entry->skb_list.next->data;
3364 f_fc = le16_to_cpu(f_hdr->frame_control);
3365
3366 if ((fc & IEEE80211_FCTL_FTYPE) != (f_fc & IEEE80211_FCTL_FTYPE) ||
3367 compare_ether_addr(hdr->addr1, f_hdr->addr1) != 0 ||
3368 compare_ether_addr(hdr->addr2, f_hdr->addr2) != 0)
3369 continue;
3370
3371 if (entry->first_frag_time + 2 * HZ < jiffies) {
3372 __skb_queue_purge(&entry->skb_list);
3373 continue;
3374 }
3375 return entry;
3376 }
3377
3378 return NULL;
3379}
3380
3381
3382static ieee80211_txrx_result
3383ieee80211_rx_h_defragment(struct ieee80211_txrx_data *rx)
3384{
3385 struct ieee80211_hdr *hdr;
3386 u16 sc;
3387 unsigned int frag, seq;
3388 struct ieee80211_fragment_entry *entry;
3389 struct sk_buff *skb;
3390
3391 hdr = (struct ieee80211_hdr *) rx->skb->data;
3392 sc = le16_to_cpu(hdr->seq_ctrl);
3393 frag = sc & IEEE80211_SCTL_FRAG;
3394
3395 if (likely((!(rx->fc & IEEE80211_FCTL_MOREFRAGS) && frag == 0) ||
3396 (rx->skb)->len < 24 ||
3397 is_multicast_ether_addr(hdr->addr1))) {
3398 /* not fragmented */
3399 goto out;
3400 }
3401 I802_DEBUG_INC(rx->local->rx_handlers_fragments);
3402
3403 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3404
3405 if (frag == 0) {
3406 /* This is the first fragment of a new frame. */
3407 entry = ieee80211_reassemble_add(rx->sdata, frag, seq,
3408 rx->u.rx.queue, &(rx->skb));
3409 if (rx->key && rx->key->alg == ALG_CCMP &&
3410 (rx->fc & IEEE80211_FCTL_PROTECTED)) {
3411 /* Store CCMP PN so that we can verify that the next
3412 * fragment has a sequential PN value. */
3413 entry->ccmp = 1;
3414 memcpy(entry->last_pn,
3415 rx->key->u.ccmp.rx_pn[rx->u.rx.queue],
3416 CCMP_PN_LEN);
3417 }
3418 return TXRX_QUEUED;
3419 }
3420
3421 /* This is a fragment for a frame that should already be pending in
3422 * fragment cache. Add this fragment to the end of the pending entry.
3423 */
3424 entry = ieee80211_reassemble_find(rx->sdata, rx->fc, frag, seq,
3425 rx->u.rx.queue, hdr);
3426 if (!entry) {
3427 I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
3428 return TXRX_DROP;
3429 }
3430
3431 /* Verify that MPDUs within one MSDU have sequential PN values.
3432 * (IEEE 802.11i, 8.3.3.4.5) */
3433 if (entry->ccmp) {
3434 int i;
3435 u8 pn[CCMP_PN_LEN], *rpn;
3436 if (!rx->key || rx->key->alg != ALG_CCMP)
3437 return TXRX_DROP;
3438 memcpy(pn, entry->last_pn, CCMP_PN_LEN);
3439 for (i = CCMP_PN_LEN - 1; i >= 0; i--) {
3440 pn[i]++;
3441 if (pn[i])
3442 break;
3443 }
3444 rpn = rx->key->u.ccmp.rx_pn[rx->u.rx.queue];
3445 if (memcmp(pn, rpn, CCMP_PN_LEN) != 0) {
3446 printk(KERN_DEBUG "%s: defrag: CCMP PN not sequential"
3447 " A2=" MAC_FMT " PN=%02x%02x%02x%02x%02x%02x "
3448 "(expected %02x%02x%02x%02x%02x%02x)\n",
3449 rx->dev->name, MAC_ARG(hdr->addr2),
3450 rpn[0], rpn[1], rpn[2], rpn[3], rpn[4], rpn[5],
3451 pn[0], pn[1], pn[2], pn[3], pn[4], pn[5]);
3452 return TXRX_DROP;
3453 }
3454 memcpy(entry->last_pn, pn, CCMP_PN_LEN);
3455 }
3456
3457 skb_pull(rx->skb, ieee80211_get_hdrlen(rx->fc));
3458 __skb_queue_tail(&entry->skb_list, rx->skb);
3459 entry->last_frag = frag;
3460 entry->extra_len += rx->skb->len;
3461 if (rx->fc & IEEE80211_FCTL_MOREFRAGS) {
3462 rx->skb = NULL;
3463 return TXRX_QUEUED;
3464 }
3465
3466 rx->skb = __skb_dequeue(&entry->skb_list);
3467 if (skb_tailroom(rx->skb) < entry->extra_len) {
3468 I802_DEBUG_INC(rx->local->rx_expand_skb_head2);
3469 if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len,
3470 GFP_ATOMIC))) {
3471 I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
3472 __skb_queue_purge(&entry->skb_list);
3473 return TXRX_DROP;
3474 }
3475 }
e8fdeca2 3476 while ((skb = __skb_dequeue(&entry->skb_list))) {
f0706e82 3477 memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len);
e8fdeca2
HL		 3478 dev_kfree_skb(skb);
3479 }
f0706e82
JB		 3480
3481 /* Complete frame has been reassembled - process it now */
3482 rx->fragmented = 1;
3483
3484 out:
3485 if (rx->sta)
3486 rx->sta->rx_packets++;
3487 if (is_multicast_ether_addr(hdr->addr1))
3488 rx->local->dot11MulticastReceivedFrameCount++;
3489 else
3490 ieee80211_led_rx(rx->local);
3491 return TXRX_CONTINUE;
3492}
3493
3494
3495static ieee80211_txrx_result
3496ieee80211_rx_h_monitor(struct ieee80211_txrx_data *rx)
3497{
3498 if (rx->sdata->type == IEEE80211_IF_TYPE_MNTR) {
3499 ieee80211_rx_monitor(rx->dev, rx->skb, rx->u.rx.status);
3500 return TXRX_QUEUED;
3501 }
3502
3503 if (rx->u.rx.status->flag & RX_FLAG_RADIOTAP)
3504 skb_pull(rx->skb, ieee80211_get_radiotap_len(rx->skb));
3505
3506 return TXRX_CONTINUE;
3507}
3508
3509
3510static ieee80211_txrx_result
3511ieee80211_rx_h_check(struct ieee80211_txrx_data *rx)
3512{
3513 struct ieee80211_hdr *hdr;
3514 int always_sta_key;
3515 hdr = (struct ieee80211_hdr *) rx->skb->data;
3516
3517 /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */
3518 if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) {
3519 if (unlikely(rx->fc & IEEE80211_FCTL_RETRY &&
3520 rx->sta->last_seq_ctrl[rx->u.rx.queue] ==
3521 hdr->seq_ctrl)) {
3522 if (rx->u.rx.ra_match) {
3523 rx->local->dot11FrameDuplicateCount++;
3524 rx->sta->num_duplicates++;
3525 }
3526 return TXRX_DROP;
3527 } else
3528 rx->sta->last_seq_ctrl[rx->u.rx.queue] = hdr->seq_ctrl;
3529 }
3530
3531 if ((rx->local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) &&
3532 rx->skb->len > FCS_LEN)
3533 skb_trim(rx->skb, rx->skb->len - FCS_LEN);
3534
3535 if (unlikely(rx->skb->len < 16)) {
3536 I802_DEBUG_INC(rx->local->rx_handlers_drop_short);
3537 return TXRX_DROP;
3538 }
3539
3540 if (!rx->u.rx.ra_match)
3541 rx->skb->pkt_type = PACKET_OTHERHOST;
3542 else if (compare_ether_addr(rx->dev->dev_addr, hdr->addr1) == 0)
3543 rx->skb->pkt_type = PACKET_HOST;
3544 else if (is_multicast_ether_addr(hdr->addr1)) {
3545 if (is_broadcast_ether_addr(hdr->addr1))
3546 rx->skb->pkt_type = PACKET_BROADCAST;
3547 else
3548 rx->skb->pkt_type = PACKET_MULTICAST;
3549 } else
3550 rx->skb->pkt_type = PACKET_OTHERHOST;
3551
3552 /* Drop disallowed frame classes based on STA auth/assoc state;
3553 * IEEE 802.11, Chap 5.5.
3554 *
3555 * 80211.o does filtering only based on association state, i.e., it
3556 * drops Class 3 frames from not associated stations. hostapd sends
3557 * deauth/disassoc frames when needed. In addition, hostapd is
3558 * responsible for filtering on both auth and assoc states.
3559 */
3560 if (unlikely(((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA ||
3561 ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL &&
3562 (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)) &&
3563 rx->sdata->type != IEEE80211_IF_TYPE_IBSS &&
3564 (!rx->sta || !(rx->sta->flags & WLAN_STA_ASSOC)))) {
3565 if ((!(rx->fc & IEEE80211_FCTL_FROMDS) &&
3566 !(rx->fc & IEEE80211_FCTL_TODS) &&
3567 (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)
3568 || !rx->u.rx.ra_match) {
3569 /* Drop IBSS frames and frames for other hosts
3570 * silently. */
3571 return TXRX_DROP;
3572 }
3573
3574 if (!rx->local->apdev)
3575 return TXRX_DROP;
3576
3577 ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
3578 ieee80211_msg_sta_not_assoc);
3579 return TXRX_QUEUED;
3580 }
3581
3582 if (rx->sdata->type == IEEE80211_IF_TYPE_STA)
3583 always_sta_key = 0;
3584 else
3585 always_sta_key = 1;
3586
3587 if (rx->sta && rx->sta->key && always_sta_key) {
3588 rx->key = rx->sta->key;
3589 } else {
3590 if (rx->sta && rx->sta->key)
3591 rx->key = rx->sta->key;
3592 else
3593 rx->key = rx->sdata->default_key;
3594
3595 if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) &&
3596 rx->fc & IEEE80211_FCTL_PROTECTED) {
3597 int keyidx = ieee80211_wep_get_keyidx(rx->skb);
3598
3599 if (keyidx >= 0 && keyidx < NUM_DEFAULT_KEYS &&
3600 (!rx->sta || !rx->sta->key || keyidx > 0))
3601 rx->key = rx->sdata->keys[keyidx];
3602
3603 if (!rx->key) {
3604 if (!rx->u.rx.ra_match)
3605 return TXRX_DROP;
3606 printk(KERN_DEBUG "%s: RX WEP frame with "
3607 "unknown keyidx %d (A1=" MAC_FMT " A2="
3608 MAC_FMT " A3=" MAC_FMT ")\n",
3609 rx->dev->name, keyidx,
3610 MAC_ARG(hdr->addr1),
3611 MAC_ARG(hdr->addr2),
3612 MAC_ARG(hdr->addr3));
3613 if (!rx->local->apdev)
3614 return TXRX_DROP;
3615 ieee80211_rx_mgmt(
3616 rx->local, rx->skb, rx->u.rx.status,
3617 ieee80211_msg_wep_frame_unknown_key);
3618 return TXRX_QUEUED;
3619 }
3620 }
3621 }
3622
3623 if (rx->fc & IEEE80211_FCTL_PROTECTED && rx->key && rx->u.rx.ra_match) {
3624 rx->key->tx_rx_count++;
3625 if (unlikely(rx->local->key_tx_rx_threshold &&
3626 rx->key->tx_rx_count >
3627 rx->local->key_tx_rx_threshold)) {
3628 ieee80211_key_threshold_notify(rx->dev, rx->key,
3629 rx->sta);
3630 }
3631 }
3632
3633 return TXRX_CONTINUE;
3634}
3635
3636
3637static ieee80211_txrx_result
3638ieee80211_rx_h_sta_process(struct ieee80211_txrx_data *rx)
3639{
3640 struct sta_info *sta = rx->sta;
3641 struct net_device *dev = rx->dev;
3642 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
3643
3644 if (!sta)
3645 return TXRX_CONTINUE;
3646
3647 /* Update last_rx only for IBSS packets which are for the current
3648 * BSSID to avoid keeping the current IBSS network alive in cases where
3649 * other STAs are using different BSSID. */
3650 if (rx->sdata->type == IEEE80211_IF_TYPE_IBSS) {
3651 u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len);
3652 if (compare_ether_addr(bssid, rx->sdata->u.sta.bssid) == 0)
3653 sta->last_rx = jiffies;
3654 } else
3655 if (!is_multicast_ether_addr(hdr->addr1) ||
3656 rx->sdata->type == IEEE80211_IF_TYPE_STA) {
3657 /* Update last_rx only for unicast frames in order to prevent
3658 * the Probe Request frames (the only broadcast frames from a
3659 * STA in infrastructure mode) from keeping a connection alive.
3660 */
3661 sta->last_rx = jiffies;
3662 }
3663
3664 if (!rx->u.rx.ra_match)
3665 return TXRX_CONTINUE;
3666
3667 sta->rx_fragments++;
3668 sta->rx_bytes += rx->skb->len;
3669 sta->last_rssi = (sta->last_rssi * 15 +
3670 rx->u.rx.status->ssi) / 16;
3671 sta->last_signal = (sta->last_signal * 15 +
3672 rx->u.rx.status->signal) / 16;
3673 sta->last_noise = (sta->last_noise * 15 +
3674 rx->u.rx.status->noise) / 16;
3675
3676 if (!(rx->fc & IEEE80211_FCTL_MOREFRAGS)) {
3677 /* Change STA power saving mode only in the end of a frame
3678 * exchange sequence */
3679 if ((sta->flags & WLAN_STA_PS) && !(rx->fc & IEEE80211_FCTL_PM))
3680 rx->u.rx.sent_ps_buffered += ap_sta_ps_end(dev, sta);
3681 else if (!(sta->flags & WLAN_STA_PS) &&
3682 (rx->fc & IEEE80211_FCTL_PM))
3683 ap_sta_ps_start(dev, sta);
3684 }
3685
3686 /* Drop data::nullfunc frames silently, since they are used only to
3687 * control station power saving mode. */
3688 if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
3689 (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_NULLFUNC) {
3690 I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc);
3691 /* Update counter and free packet here to avoid counting this
3692 * as a dropped packed. */
3693 sta->rx_packets++;
3694 dev_kfree_skb(rx->skb);
3695 return TXRX_QUEUED;
3696 }
3697
3698 return TXRX_CONTINUE;
3699} /* ieee80211_rx_h_sta_process */
3700
3701
3702static ieee80211_txrx_result
3703ieee80211_rx_h_wep_weak_iv_detection(struct ieee80211_txrx_data *rx)
3704{
3705 if (!rx->sta || !(rx->fc & IEEE80211_FCTL_PROTECTED) ||
3706 (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA ||
3707 !rx->key || rx->key->alg != ALG_WEP || !rx->u.rx.ra_match)
3708 return TXRX_CONTINUE;
3709
3710 /* Check for weak IVs, if hwaccel did not remove IV from the frame */
3711 if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) ||
3712 rx->key->force_sw_encrypt) {
3713 u8 *iv = ieee80211_wep_is_weak_iv(rx->skb, rx->key);
3714 if (iv) {
3715 rx->sta->wep_weak_iv_count++;
3716 }
3717 }
3718
3719 return TXRX_CONTINUE;
3720}
3721
3722
3723static ieee80211_txrx_result
3724ieee80211_rx_h_wep_decrypt(struct ieee80211_txrx_data *rx)
3725{
3726 /* If the device handles decryption totally, skip this test */
3727 if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP)
3728 return TXRX_CONTINUE;
3729
3730 if ((rx->key && rx->key->alg != ALG_WEP) ||
3731 !(rx->fc & IEEE80211_FCTL_PROTECTED) ||
3732 ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
3733 ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
3734 (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)))
3735 return TXRX_CONTINUE;
3736
3737 if (!rx->key) {
3738 printk(KERN_DEBUG "%s: RX WEP frame, but no key set\n",
3739 rx->dev->name);
3740 return TXRX_DROP;
3741 }
3742
3743 if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED) ||
3744 rx->key->force_sw_encrypt) {
3745 if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) {
3746 printk(KERN_DEBUG "%s: RX WEP frame, decrypt "
3747 "failed\n", rx->dev->name);
3748 return TXRX_DROP;
3749 }
3750 } else if (rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) {
3751 ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key);
3752 /* remove ICV */
3753 skb_trim(rx->skb, rx->skb->len - 4);
3754 }
3755
3756 return TXRX_CONTINUE;
3757}
3758
3759
3760static ieee80211_txrx_result
3761ieee80211_rx_h_802_1x_pae(struct ieee80211_txrx_data *rx)
3762{
3763 if (rx->sdata->eapol && ieee80211_is_eapol(rx->skb) &&
3764 rx->sdata->type != IEEE80211_IF_TYPE_STA && rx->u.rx.ra_match) {
3765 /* Pass both encrypted and unencrypted EAPOL frames to user
3766 * space for processing. */
3767 if (!rx->local->apdev)
3768 return TXRX_DROP;
3769 ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
3770 ieee80211_msg_normal);
3771 return TXRX_QUEUED;
3772 }
3773
3774 if (unlikely(rx->sdata->ieee802_1x &&
3775 (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
3776 (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC &&
3777 (!rx->sta || !(rx->sta->flags & WLAN_STA_AUTHORIZED)) &&
3778 !ieee80211_is_eapol(rx->skb))) {
3779#ifdef CONFIG_MAC80211_DEBUG
3780 struct ieee80211_hdr *hdr =
3781 (struct ieee80211_hdr *) rx->skb->data;
3782 printk(KERN_DEBUG "%s: dropped frame from " MAC_FMT
3783 " (unauthorized port)\n", rx->dev->name,
3784 MAC_ARG(hdr->addr2));
3785#endif /* CONFIG_MAC80211_DEBUG */
3786 return TXRX_DROP;
3787 }
3788
3789 return TXRX_CONTINUE;
3790}
3791
3792
3793static ieee80211_txrx_result
3794ieee80211_rx_h_drop_unencrypted(struct ieee80211_txrx_data *rx)
3795{
3796 /* If the device handles decryption totally, skip this test */
3797 if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP)
3798 return TXRX_CONTINUE;
3799
3800 /* Drop unencrypted frames if key is set. */
3801 if (unlikely(!(rx->fc & IEEE80211_FCTL_PROTECTED) &&
3802 (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
3803 (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC &&
3804 (rx->key || rx->sdata->drop_unencrypted) &&
3805 (rx->sdata->eapol == 0 ||
3806 !ieee80211_is_eapol(rx->skb)))) {
3807 printk(KERN_DEBUG "%s: RX non-WEP frame, but expected "
3808 "encryption\n", rx->dev->name);
3809 return TXRX_DROP;
3810 }
3811 return TXRX_CONTINUE;
3812}
3813
3814
3815static ieee80211_txrx_result
3816ieee80211_rx_h_mgmt(struct ieee80211_txrx_data *rx)
3817{
3818 struct ieee80211_sub_if_data *sdata;
3819
3820 if (!rx->u.rx.ra_match)
3821 return TXRX_DROP;
3822
3823 sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
3824 if ((sdata->type == IEEE80211_IF_TYPE_STA ||
3825 sdata->type == IEEE80211_IF_TYPE_IBSS) &&
3826 !rx->local->user_space_mlme) {
3827 ieee80211_sta_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status);
3828 } else {
3829 /* Management frames are sent to hostapd for processing */
3830 if (!rx->local->apdev)
3831 return TXRX_DROP;
3832 ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
3833 ieee80211_msg_normal);
3834 }
3835 return TXRX_QUEUED;
3836}
3837
3838
3839static ieee80211_txrx_result
3840ieee80211_rx_h_passive_scan(struct ieee80211_txrx_data *rx)
3841{
3842 struct ieee80211_local *local = rx->local;
3843 struct sk_buff *skb = rx->skb;
3844
3845 if (unlikely(local->sta_scanning != 0)) {
3846 ieee80211_sta_rx_scan(rx->dev, skb, rx->u.rx.status);
3847 return TXRX_QUEUED;
3848 }
3849
3850 if (unlikely(rx->u.rx.in_scan)) {
3851 /* scanning finished during invoking of handlers */
3852 I802_DEBUG_INC(local->rx_handlers_drop_passive_scan);
3853 return TXRX_DROP;
3854 }
3855
3856 return TXRX_CONTINUE;
3857}
3858
3859
3860static void ieee80211_rx_michael_mic_report(struct net_device *dev,
3861 struct ieee80211_hdr *hdr,
3862 struct sta_info *sta,
3863 struct ieee80211_txrx_data *rx)
3864{
3865 int keyidx, hdrlen;
3866
3867 hdrlen = ieee80211_get_hdrlen_from_skb(rx->skb);
3868 if (rx->skb->len >= hdrlen + 4)
3869 keyidx = rx->skb->data[hdrlen + 3] >> 6;
3870 else
3871 keyidx = -1;
3872
3873 /* TODO: verify that this is not triggered by fragmented
3874 * frames (hw does not verify MIC for them). */
3875 printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC "
3876 "failure from " MAC_FMT " to " MAC_FMT " keyidx=%d\n",
3877 dev->name, MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr1), keyidx);
3878
3879 if (!sta) {
3880 /* Some hardware versions seem to generate incorrect
3881 * Michael MIC reports; ignore them to avoid triggering
3882 * countermeasures. */
3883 printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
3884 "error for unknown address " MAC_FMT "\n",
3885 dev->name, MAC_ARG(hdr->addr2));
3886 goto ignore;
3887 }
3888
3889 if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) {
3890 printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
3891 "error for a frame with no ISWEP flag (src "
3892 MAC_FMT ")\n", dev->name, MAC_ARG(hdr->addr2));
3893 goto ignore;
3894 }
3895
3896 if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) &&
3897 rx->sdata->type == IEEE80211_IF_TYPE_AP) {
3898 keyidx = ieee80211_wep_get_keyidx(rx->skb);
3899 /* AP with Pairwise keys support should never receive Michael
3900 * MIC errors for non-zero keyidx because these are reserved
3901 * for group keys and only the AP is sending real multicast
3902 * frames in BSS. */
3903 if (keyidx) {
3904 printk(KERN_DEBUG "%s: ignored Michael MIC error for "
3905 "a frame with non-zero keyidx (%d) (src " MAC_FMT
3906 ")\n", dev->name, keyidx, MAC_ARG(hdr->addr2));
3907 goto ignore;
3908 }
3909 }
3910
3911 if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
3912 ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
3913 (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)) {
3914 printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
3915 "error for a frame that cannot be encrypted "
3916 "(fc=0x%04x) (src " MAC_FMT ")\n",
3917 dev->name, rx->fc, MAC_ARG(hdr->addr2));
3918 goto ignore;
3919 }
3920
3921 do {
3922 union iwreq_data wrqu;
3923 char *buf = kmalloc(128, GFP_ATOMIC);
3924 if (!buf)
3925 break;
3926
3927 /* TODO: needed parameters: count, key type, TSC */
3928 sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
3929 "keyid=%d %scast addr=" MAC_FMT ")",
3930 keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni",
3931 MAC_ARG(hdr->addr2));
3932 memset(&wrqu, 0, sizeof(wrqu));
3933 wrqu.data.length = strlen(buf);
3934 wireless_send_event(rx->dev, IWEVCUSTOM, &wrqu, buf);
3935 kfree(buf);
3936 } while (0);
3937
3938 /* TODO: consider verifying the MIC error report with software
3939 * implementation if we get too many spurious reports from the
3940 * hardware. */
3941 if (!rx->local->apdev)
3942 goto ignore;
3943 ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
3944 ieee80211_msg_michael_mic_failure);
3945 return;
3946
3947 ignore:
3948 dev_kfree_skb(rx->skb);
3949 rx->skb = NULL;
3950}
3951
3952static inline ieee80211_txrx_result __ieee80211_invoke_rx_handlers(
3953 struct ieee80211_local *local,
3954 ieee80211_rx_handler *handlers,
3955 struct ieee80211_txrx_data *rx,
3956 struct sta_info *sta)
3957{
3958 ieee80211_rx_handler *handler;
3959 ieee80211_txrx_result res = TXRX_DROP;
3960
3961 for (handler = handlers; *handler != NULL; handler++) {
3962 res = (*handler)(rx);
3963 if (res != TXRX_CONTINUE) {
3964 if (res == TXRX_DROP) {
3965 I802_DEBUG_INC(local->rx_handlers_drop);
3966 if (sta)
3967 sta->rx_dropped++;
3968 }
3969 if (res == TXRX_QUEUED)
3970 I802_DEBUG_INC(local->rx_handlers_queued);
3971 break;
3972 }
3973 }
3974
3975 if (res == TXRX_DROP) {
3976 dev_kfree_skb(rx->skb);
3977 }
3978 return res;
3979}
3980
3981static inline void ieee80211_invoke_rx_handlers(struct ieee80211_local *local,
3982 ieee80211_rx_handler *handlers,
3983 struct ieee80211_txrx_data *rx,
3984 struct sta_info *sta)
3985{
3986 if (__ieee80211_invoke_rx_handlers(local, handlers, rx, sta) ==
3987 TXRX_CONTINUE)
3988 dev_kfree_skb(rx->skb);
3989}
3990
3991/*
3992 * This is the receive path handler. It is called by a low level driver when an
3993 * 802.11 MPDU is received from the hardware.
3994 */
3995void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
3996 struct ieee80211_rx_status *status)
3997{
3998 struct ieee80211_local *local = hw_to_local(hw);
3999 struct ieee80211_sub_if_data *sdata;
4000 struct sta_info *sta;
4001 struct ieee80211_hdr *hdr;
4002 struct ieee80211_txrx_data rx;
4003 u16 type;
4004 int multicast;
4005 int radiotap_len = 0;
4006
4007 if (status->flag & RX_FLAG_RADIOTAP) {
4008 radiotap_len = ieee80211_get_radiotap_len(skb);
4009 skb_pull(skb, radiotap_len);
4010 }
4011
4012 hdr = (struct ieee80211_hdr *) skb->data;
4013 memset(&rx, 0, sizeof(rx));
4014 rx.skb = skb;
4015 rx.local = local;
4016
4017 rx.u.rx.status = status;
4018 rx.fc = skb->len >= 2 ? le16_to_cpu(hdr->frame_control) : 0;
4019 type = rx.fc & IEEE80211_FCTL_FTYPE;
4020 if (type == IEEE80211_FTYPE_DATA || type == IEEE80211_FTYPE_MGMT)
4021 local->dot11ReceivedFragmentCount++;
4022 multicast = is_multicast_ether_addr(hdr->addr1);
4023
4024 if (skb->len >= 16)
4025 sta = rx.sta = sta_info_get(local, hdr->addr2);
4026 else
4027 sta = rx.sta = NULL;
4028
4029 if (sta) {
4030 rx.dev = sta->dev;
4031 rx.sdata = IEEE80211_DEV_TO_SUB_IF(rx.dev);
4032 }
4033
4034 if ((status->flag & RX_FLAG_MMIC_ERROR)) {
4035 ieee80211_rx_michael_mic_report(local->mdev, hdr, sta, &rx);
4036 goto end;
4037 }
4038
4039 if (unlikely(local->sta_scanning))
4040 rx.u.rx.in_scan = 1;
4041
4042 if (__ieee80211_invoke_rx_handlers(local, local->rx_pre_handlers, &rx,
4043 sta) != TXRX_CONTINUE)
4044 goto end;
4045 skb = rx.skb;
4046
4047 skb_push(skb, radiotap_len);
4048 if (sta && !sta->assoc_ap && !(sta->flags & WLAN_STA_WDS) &&
4049 !local->iff_promiscs && !multicast) {
4050 rx.u.rx.ra_match = 1;
4051 ieee80211_invoke_rx_handlers(local, local->rx_handlers, &rx,
4052 sta);
4053 } else {
4054 struct ieee80211_sub_if_data *prev = NULL;
4055 struct sk_buff *skb_new;
4056 u8 *bssid = ieee80211_get_bssid(hdr, skb->len - radiotap_len);
4057
4058 read_lock(&local->sub_if_lock);
4059 list_for_each_entry(sdata, &local->sub_if_list, list) {
4060 rx.u.rx.ra_match = 1;
4061 switch (sdata->type) {
4062 case IEEE80211_IF_TYPE_STA:
4063 if (!bssid)
4064 continue;
4065 if (!ieee80211_bssid_match(bssid,
4066 sdata->u.sta.bssid)) {
4067 if (!rx.u.rx.in_scan)
4068 continue;
4069 rx.u.rx.ra_match = 0;
4070 } else if (!multicast &&
4071 compare_ether_addr(sdata->dev->dev_addr,
4072 hdr->addr1) != 0) {
4073 if (!sdata->promisc)
4074 continue;
4075 rx.u.rx.ra_match = 0;
4076 }
4077 break;
4078 case IEEE80211_IF_TYPE_IBSS:
4079 if (!bssid)
4080 continue;
4081 if (!ieee80211_bssid_match(bssid,
4082 sdata->u.sta.bssid)) {
4083 if (!rx.u.rx.in_scan)
4084 continue;
4085 rx.u.rx.ra_match = 0;
4086 } else if (!multicast &&
4087 compare_ether_addr(sdata->dev->dev_addr,
4088 hdr->addr1) != 0) {
4089 if (!sdata->promisc)
4090 continue;
4091 rx.u.rx.ra_match = 0;
4092 } else if (!sta)
4093 sta = rx.sta =
4094 ieee80211_ibss_add_sta(sdata->dev,
4095 skb, bssid,
4096 hdr->addr2);
4097 break;
4098 case IEEE80211_IF_TYPE_AP:
4099 if (!bssid) {
4100 if (compare_ether_addr(sdata->dev->dev_addr,
4101 hdr->addr1) != 0)
4102 continue;
4103 } else if (!ieee80211_bssid_match(bssid,
4104 sdata->dev->dev_addr)) {
4105 if (!rx.u.rx.in_scan)
4106 continue;
4107 rx.u.rx.ra_match = 0;
4108 }
4109 if (sdata->dev == local->mdev &&
4110 !rx.u.rx.in_scan)
4111 /* do not receive anything via
4112 * master device when not scanning */
4113 continue;
4114 break;
4115 case IEEE80211_IF_TYPE_WDS:
4116 if (bssid ||
4117 (rx.fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
4118 continue;
4119 if (compare_ether_addr(sdata->u.wds.remote_addr,
4120 hdr->addr2) != 0)
4121 continue;
4122 break;
4123 }
4124
4125 if (prev) {
4126 skb_new = skb_copy(skb, GFP_ATOMIC);
4127 if (!skb_new) {
4128 if (net_ratelimit())
4129 printk(KERN_DEBUG "%s: failed to copy "
4130 "multicast frame for %s",
4131 local->mdev->name, prev->dev->name);
4132 continue;
4133 }
4134 rx.skb = skb_new;
4135 rx.dev = prev->dev;
4136 rx.sdata = prev;
4137 ieee80211_invoke_rx_handlers(local,
4138 local->rx_handlers,
4139 &rx, sta);
4140 }
4141 prev = sdata;
4142 }
4143 if (prev) {
4144 rx.skb = skb;
4145 rx.dev = prev->dev;
4146 rx.sdata = prev;
4147 ieee80211_invoke_rx_handlers(local, local->rx_handlers,
4148 &rx, sta);
4149 } else
4150 dev_kfree_skb(skb);
4151 read_unlock(&local->sub_if_lock);
4152 }
4153
4154 end:
4155 if (sta)
4156 sta_info_put(sta);
4157}
4158EXPORT_SYMBOL(__ieee80211_rx);
4159
4160static ieee80211_txrx_result
4161ieee80211_tx_h_load_stats(struct ieee80211_txrx_data *tx)
4162{
4163 struct ieee80211_local *local = tx->local;
4164 struct ieee80211_hw_mode *mode = tx->u.tx.mode;
4165 struct sk_buff *skb = tx->skb;
4166 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
4167 u32 load = 0, hdrtime;
4168
4169 /* TODO: this could be part of tx_status handling, so that the number
4170 * of retries would be known; TX rate should in that case be stored
4171 * somewhere with the packet */
4172
4173 /* Estimate total channel use caused by this frame */
4174
4175 /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values,
4176 * 1 usec = 1/8 * (1080 / 10) = 13.5 */
4177
4178 if (mode->mode == MODE_IEEE80211A ||
4179 mode->mode == MODE_ATHEROS_TURBO ||
4180 mode->mode == MODE_ATHEROS_TURBOG ||
4181 (mode->mode == MODE_IEEE80211G &&
4182 tx->u.tx.rate->flags & IEEE80211_RATE_ERP))
4183 hdrtime = CHAN_UTIL_HDR_SHORT;
4184 else
4185 hdrtime = CHAN_UTIL_HDR_LONG;
4186
4187 load = hdrtime;
4188 if (!is_multicast_ether_addr(hdr->addr1))
4189 load += hdrtime;
4190
4191 if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_RTS_CTS)
4192 load += 2 * hdrtime;
4193 else if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
4194 load += hdrtime;
4195
4196 load += skb->len * tx->u.tx.rate->rate_inv;
4197
4198 if (tx->u.tx.extra_frag) {
4199 int i;
4200 for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
4201 load += 2 * hdrtime;
4202 load += tx->u.tx.extra_frag[i]->len *
4203 tx->u.tx.rate->rate;
4204 }
4205 }
4206
4207 /* Divide channel_use by 8 to avoid wrapping around the counter */
4208 load >>= CHAN_UTIL_SHIFT;
4209 local->channel_use_raw += load;
4210 if (tx->sta)
4211 tx->sta->channel_use_raw += load;
4212 tx->sdata->channel_use_raw += load;
4213
4214 return TXRX_CONTINUE;
4215}
4216
4217
4218static ieee80211_txrx_result
4219ieee80211_rx_h_load_stats(struct ieee80211_txrx_data *rx)
4220{
4221 struct ieee80211_local *local = rx->local;
4222 struct sk_buff *skb = rx->skb;
4223 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
4224 u32 load = 0, hdrtime;
4225 struct ieee80211_rate *rate;
4226 struct ieee80211_hw_mode *mode = local->hw.conf.mode;
4227 int i;
4228
4229 /* Estimate total channel use caused by this frame */
4230
4231 if (unlikely(mode->num_rates < 0))
4232 return TXRX_CONTINUE;
4233
4234 rate = &mode->rates[0];
4235 for (i = 0; i < mode->num_rates; i++) {
4236 if (mode->rates[i].val == rx->u.rx.status->rate) {
4237 rate = &mode->rates[i];
4238 break;
4239 }
4240 }
4241
4242 /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values,
4243 * 1 usec = 1/8 * (1080 / 10) = 13.5 */
4244
4245 if (mode->mode == MODE_IEEE80211A ||
4246 mode->mode == MODE_ATHEROS_TURBO ||
4247 mode->mode == MODE_ATHEROS_TURBOG ||
4248 (mode->mode == MODE_IEEE80211G &&
4249 rate->flags & IEEE80211_RATE_ERP))
4250 hdrtime = CHAN_UTIL_HDR_SHORT;
4251 else
4252 hdrtime = CHAN_UTIL_HDR_LONG;
4253
4254 load = hdrtime;
4255 if (!is_multicast_ether_addr(hdr->addr1))
4256 load += hdrtime;
4257
4258 load += skb->len * rate->rate_inv;
4259
4260 /* Divide channel_use by 8 to avoid wrapping around the counter */
4261 load >>= CHAN_UTIL_SHIFT;
4262 local->channel_use_raw += load;
4263 if (rx->sta)
4264 rx->sta->channel_use_raw += load;
4265 rx->u.rx.load = load;
4266
4267 return TXRX_CONTINUE;
4268}
4269
4270static ieee80211_txrx_result
4271ieee80211_rx_h_if_stats(struct ieee80211_txrx_data *rx)
4272{
4273 rx->sdata->channel_use_raw += rx->u.rx.load;
4274 return TXRX_CONTINUE;
4275}
4276
4277static void ieee80211_stat_refresh(unsigned long data)
4278{
4279 struct ieee80211_local *local = (struct ieee80211_local *) data;
4280 struct sta_info *sta;
4281 struct ieee80211_sub_if_data *sdata;
4282
4283 if (!local->stat_time)
4284 return;
4285
4286 /* go through all stations */
4287 spin_lock_bh(&local->sta_lock);
4288 list_for_each_entry(sta, &local->sta_list, list) {
4289 sta->channel_use = (sta->channel_use_raw / local->stat_time) /
4290 CHAN_UTIL_PER_10MS;
4291 sta->channel_use_raw = 0;
4292 }
4293 spin_unlock_bh(&local->sta_lock);
4294
4295 /* go through all subinterfaces */
4296 read_lock(&local->sub_if_lock);
4297 list_for_each_entry(sdata, &local->sub_if_list, list) {
4298 sdata->channel_use = (sdata->channel_use_raw /
4299 local->stat_time) / CHAN_UTIL_PER_10MS;
4300 sdata->channel_use_raw = 0;
4301 }
4302 read_unlock(&local->sub_if_lock);
4303
4304 /* hardware interface */
4305 local->channel_use = (local->channel_use_raw /
4306 local->stat_time) / CHAN_UTIL_PER_10MS;
4307 local->channel_use_raw = 0;
4308
4309 local->stat_timer.expires = jiffies + HZ * local->stat_time / 100;
4310 add_timer(&local->stat_timer);
4311}
4312
4313
4314/* This is a version of the rx handler that can be called from hard irq
4315 * context. Post the skb on the queue and schedule the tasklet */
4316void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb,
4317 struct ieee80211_rx_status *status)
4318{
4319 struct ieee80211_local *local = hw_to_local(hw);
4320
4321 BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb));
4322
4323 skb->dev = local->mdev;
4324 /* copy status into skb->cb for use by tasklet */
4325 memcpy(skb->cb, status, sizeof(*status));
4326 skb->pkt_type = IEEE80211_RX_MSG;
4327 skb_queue_tail(&local->skb_queue, skb);
4328 tasklet_schedule(&local->tasklet);
4329}
4330EXPORT_SYMBOL(ieee80211_rx_irqsafe);
4331
4332void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
4333 struct sk_buff *skb,
4334 struct ieee80211_tx_status *status)
4335{
4336 struct ieee80211_local *local = hw_to_local(hw);
4337 struct ieee80211_tx_status *saved;
4338 int tmp;
4339
4340 skb->dev = local->mdev;
4341 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
4342 if (unlikely(!saved)) {
4343 if (net_ratelimit())
4344 printk(KERN_WARNING "%s: Not enough memory, "
4345 "dropping tx status", skb->dev->name);
4346 /* should be dev_kfree_skb_irq, but due to this function being
4347 * named _irqsafe instead of just _irq we can't be sure that
4348 * people won't call it from non-irq contexts */
4349 dev_kfree_skb_any(skb);
4350 return;
4351 }
4352 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
4353 /* copy pointer to saved status into skb->cb for use by tasklet */
4354 memcpy(skb->cb, &saved, sizeof(saved));
4355
4356 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
4357 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
4358 &local->skb_queue : &local->skb_queue_unreliable, skb);
4359 tmp = skb_queue_len(&local->skb_queue) +
4360 skb_queue_len(&local->skb_queue_unreliable);
4361 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
4362 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
4363 memcpy(&saved, skb->cb, sizeof(saved));
4364 kfree(saved);
4365 dev_kfree_skb_irq(skb);
4366 tmp--;
4367 I802_DEBUG_INC(local->tx_status_drop);
4368 }
4369 tasklet_schedule(&local->tasklet);
4370}
4371EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
4372
4373static void ieee80211_tasklet_handler(unsigned long data)
4374{
4375 struct ieee80211_local *local = (struct ieee80211_local *) data;
4376 struct sk_buff *skb;
4377 struct ieee80211_rx_status rx_status;
4378 struct ieee80211_tx_status *tx_status;
4379
4380 while ((skb = skb_dequeue(&local->skb_queue)) ||
4381 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
4382 switch (skb->pkt_type) {
4383 case IEEE80211_RX_MSG:
4384 /* status is in skb->cb */
4385 memcpy(&rx_status, skb->cb, sizeof(rx_status));
4386 /* Clear skb->type in order to not confuse kernel
4387 * netstack. */
4388 skb->pkt_type = 0;
4389 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
4390 break;
4391 case IEEE80211_TX_STATUS_MSG:
4392 /* get pointer to saved status out of skb->cb */
4393 memcpy(&tx_status, skb->cb, sizeof(tx_status));
4394 skb->pkt_type = 0;
4395 ieee80211_tx_status(local_to_hw(local),
4396 skb, tx_status);
4397 kfree(tx_status);
4398 break;
4399 default: /* should never get here! */
4400 printk(KERN_ERR "%s: Unknown message type (%d)\n",
4401 local->mdev->name, skb->pkt_type);
4402 dev_kfree_skb(skb);
4403 break;
4404 }
4405 }
4406}
4407
4408
4409/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
4410 * make a prepared TX frame (one that has been given to hw) to look like brand
4411 * new IEEE 802.11 frame that is ready to go through TX processing again.
4412 * Also, tx_packet_data in cb is restored from tx_control. */
4413static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
4414 struct ieee80211_key *key,
4415 struct sk_buff *skb,
4416 struct ieee80211_tx_control *control)
4417{
4418 int hdrlen, iv_len, mic_len;
4419 struct ieee80211_tx_packet_data *pkt_data;
4420
4421 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
4422 pkt_data->ifindex = control->ifindex;
4423 pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT);
4424 pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS);
4425 pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT);
4426 pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE);
4427 pkt_data->queue = control->queue;
4428
4429 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
4430
4431 if (!key)
4432 goto no_key;
4433
4434 switch (key->alg) {
4435 case ALG_WEP:
4436 iv_len = WEP_IV_LEN;
4437 mic_len = WEP_ICV_LEN;
4438 break;
4439 case ALG_TKIP:
4440 iv_len = TKIP_IV_LEN;
4441 mic_len = TKIP_ICV_LEN;
4442 break;
4443 case ALG_CCMP:
4444 iv_len = CCMP_HDR_LEN;
4445 mic_len = CCMP_MIC_LEN;
4446 break;
4447 default:
4448 goto no_key;
4449 }
4450
4451 if (skb->len >= mic_len && key->force_sw_encrypt)
4452 skb_trim(skb, skb->len - mic_len);
4453 if (skb->len >= iv_len && skb->len > hdrlen) {
4454 memmove(skb->data + iv_len, skb->data, hdrlen);
4455 skb_pull(skb, iv_len);
4456 }
4457
4458no_key:
4459 {
4460 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
4461 u16 fc = le16_to_cpu(hdr->frame_control);
4462 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
4463 fc &= ~IEEE80211_STYPE_QOS_DATA;
4464 hdr->frame_control = cpu_to_le16(fc);
4465 memmove(skb->data + 2, skb->data, hdrlen - 2);
4466 skb_pull(skb, 2);
4467 }
4468 }
4469}
4470
4471
4472void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
4473 struct ieee80211_tx_status *status)
4474{
4475 struct sk_buff *skb2;
4476 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
4477 struct ieee80211_local *local = hw_to_local(hw);
4478 u16 frag, type;
4479 u32 msg_type;
b306f453
JB		 4480 struct ieee80211_tx_status_rtap_hdr *rthdr;
4481 struct ieee80211_sub_if_data *sdata;
4482 int monitors;
f0706e82
JB		 4483
4484 if (!status) {
4485 printk(KERN_ERR
4486 "%s: ieee80211_tx_status called with NULL status\n",
4487 local->mdev->name);
4488 dev_kfree_skb(skb);
4489 return;
4490 }
4491
4492 if (status->excessive_retries) {
4493 struct sta_info *sta;
4494 sta = sta_info_get(local, hdr->addr1);
4495 if (sta) {
4496 if (sta->flags & WLAN_STA_PS) {
4497 /* The STA is in power save mode, so assume
4498 * that this TX packet failed because of that.
4499 */
4500 status->excessive_retries = 0;
4501 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
4502 }
4503 sta_info_put(sta);
4504 }
4505 }
4506
4507 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
4508 struct sta_info *sta;
4509 sta = sta_info_get(local, hdr->addr1);
4510 if (sta) {
4511 sta->tx_filtered_count++;
4512
4513 /* Clear the TX filter mask for this STA when sending
4514 * the next packet. If the STA went to power save mode,
4515 * this will happen when it is waking up for the next
4516 * time. */
4517 sta->clear_dst_mask = 1;
4518
4519 /* TODO: Is the WLAN_STA_PS flag always set here or is
4520 * the race between RX and TX status causing some
4521 * packets to be filtered out before 80211.o gets an
4522 * update for PS status? This seems to be the case, so
4523 * no changes are likely to be needed. */
4524 if (sta->flags & WLAN_STA_PS &&
4525 skb_queue_len(&sta->tx_filtered) <
4526 STA_MAX_TX_BUFFER) {
4527 ieee80211_remove_tx_extra(local, sta->key,
4528 skb,
4529 &status->control);
4530 skb_queue_tail(&sta->tx_filtered, skb);
4531 } else if (!(sta->flags & WLAN_STA_PS) &&
4532 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
4533 /* Software retry the packet once */
4534 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
4535 ieee80211_remove_tx_extra(local, sta->key,
4536 skb,
4537 &status->control);
4538 dev_queue_xmit(skb);
4539 } else {
4540 if (net_ratelimit()) {
4541 printk(KERN_DEBUG "%s: dropped TX "
4542 "filtered frame queue_len=%d "
4543 "PS=%d @%lu\n",
4544 local->mdev->name,
4545 skb_queue_len(
4546 &sta->tx_filtered),
4547 !!(sta->flags & WLAN_STA_PS),
4548 jiffies);
4549 }
4550 dev_kfree_skb(skb);
4551 }
4552 sta_info_put(sta);
4553 return;
4554 }
4555 } else {
4556 /* FIXME: STUPID to call this with both local and local->mdev */
4557 rate_control_tx_status(local, local->mdev, skb, status);
4558 }
4559
4560 ieee80211_led_tx(local, 0);
4561
4562 /* SNMP counters
4563 * Fragments are passed to low-level drivers as separate skbs, so these
4564 * are actually fragments, not frames. Update frame counters only for
4565 * the first fragment of the frame. */
4566
4567 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
4568 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
4569
4570 if (status->flags & IEEE80211_TX_STATUS_ACK) {
4571 if (frag == 0) {
4572 local->dot11TransmittedFrameCount++;
4573 if (is_multicast_ether_addr(hdr->addr1))
4574 local->dot11MulticastTransmittedFrameCount++;
4575 if (status->retry_count > 0)
4576 local->dot11RetryCount++;
4577 if (status->retry_count > 1)
4578 local->dot11MultipleRetryCount++;
4579 }
4580
4581 /* This counter shall be incremented for an acknowledged MPDU
4582 * with an individual address in the address 1 field or an MPDU
4583 * with a multicast address in the address 1 field of type Data
4584 * or Management. */
4585 if (!is_multicast_ether_addr(hdr->addr1) ||
4586 type == IEEE80211_FTYPE_DATA ||
4587 type == IEEE80211_FTYPE_MGMT)
4588 local->dot11TransmittedFragmentCount++;
4589 } else {
4590 if (frag == 0)
4591 local->dot11FailedCount++;
4592 }
4593
b306f453
JB		 4594 msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
4595 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
4596
4597 /* this was a transmitted frame, but now we want to reuse it */
4598 skb_orphan(skb);
4599
4600 if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
4601 local->apdev) {
4602 if (local->monitors) {
4603 skb2 = skb_clone(skb, GFP_ATOMIC);
4604 } else {
4605 skb2 = skb;
4606 skb = NULL;
4607 }
4608
4609 if (skb2)
4610 /* Send frame to hostapd */
4611 ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
4612
4613 if (!skb)
4614 return;
4615 }
4616
4617 if (!local->monitors) {
f0706e82
JB		 4618 dev_kfree_skb(skb);
4619 return;
4620 }
4621
b306f453 4622 /* send frame to monitor interfaces now */
f0706e82 4623
b306f453
JB		 4624 if (skb_headroom(skb) < sizeof(*rthdr)) {
4625 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
f0706e82
JB		 4626 dev_kfree_skb(skb);
4627 return;
4628 }
f0706e82 4629
b306f453
JB		 4630 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
4631 skb_push(skb, sizeof(*rthdr));
4632
4633 memset(rthdr, 0, sizeof(*rthdr));
4634 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
4635 rthdr->hdr.it_present =
4636 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
4637 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
4638
4639 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
4640 !is_multicast_ether_addr(hdr->addr1))
4641 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
4642
4643 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
4644 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
4645 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
4646 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
4647 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
4648
4649 rthdr->data_retries = status->retry_count;
4650
4651 read_lock(&local->sub_if_lock);
4652 monitors = local->monitors;
4653 list_for_each_entry(sdata, &local->sub_if_list, list) {
4654 /*
4655 * Using the monitors counter is possibly racy, but
4656 * if the value is wrong we simply either clone the skb
4657 * once too much or forget sending it to one monitor iface
4658 * The latter case isn't nice but fixing the race is much
4659 * more complicated.
4660 */
4661 if (!monitors || !skb)
4662 goto out;
4663
4664 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
4665 if (!netif_running(sdata->dev))
4666 continue;
4667 monitors--;
4668 if (monitors)
4669 skb2 = skb_clone(skb, GFP_KERNEL);
4670 else
4671 skb2 = NULL;
4672 skb->dev = sdata->dev;
4673 /* XXX: is this sufficient for BPF? */
4674 skb_set_mac_header(skb, 0);
4675 skb->ip_summed = CHECKSUM_UNNECESSARY;
4676 skb->pkt_type = PACKET_OTHERHOST;
4677 skb->protocol = htons(ETH_P_802_2);
4678 memset(skb->cb, 0, sizeof(skb->cb));
4679 netif_rx(skb);
4680 skb = skb2;
b306f453
JB		 4681 }
4682 }
4683 out:
4684 read_unlock(&local->sub_if_lock);
4685 if (skb)
4686 dev_kfree_skb(skb);
f0706e82
JB		 4687}
4688EXPORT_SYMBOL(ieee80211_tx_status);
4689
4690/* TODO: implement register/unregister functions for adding TX/RX handlers
4691 * into ordered list */
4692
4693/* rx_pre handlers don't have dev and sdata fields available in
4694 * ieee80211_txrx_data */
4695static ieee80211_rx_handler ieee80211_rx_pre_handlers[] =
4696{
4697 ieee80211_rx_h_parse_qos,
4698 ieee80211_rx_h_load_stats,
4699 NULL
4700};
4701
4702static ieee80211_rx_handler ieee80211_rx_handlers[] =
4703{
4704 ieee80211_rx_h_if_stats,
4705 ieee80211_rx_h_monitor,
4706 ieee80211_rx_h_passive_scan,
4707 ieee80211_rx_h_check,
4708 ieee80211_rx_h_sta_process,
4709 ieee80211_rx_h_ccmp_decrypt,
4710 ieee80211_rx_h_tkip_decrypt,
4711 ieee80211_rx_h_wep_weak_iv_detection,
4712 ieee80211_rx_h_wep_decrypt,
4713 ieee80211_rx_h_defragment,
4714 ieee80211_rx_h_ps_poll,
4715 ieee80211_rx_h_michael_mic_verify,
4716 /* this must be after decryption - so header is counted in MPDU mic
4717 * must be before pae and data, so QOS_DATA format frames
4718 * are not passed to user space by these functions
4719 */
4720 ieee80211_rx_h_remove_qos_control,
4721 ieee80211_rx_h_802_1x_pae,
4722 ieee80211_rx_h_drop_unencrypted,
4723 ieee80211_rx_h_data,
4724 ieee80211_rx_h_mgmt,
4725 NULL
4726};
4727
4728static ieee80211_tx_handler ieee80211_tx_handlers[] =
4729{
4730 ieee80211_tx_h_check_assoc,
4731 ieee80211_tx_h_sequence,
4732 ieee80211_tx_h_ps_buf,
4733 ieee80211_tx_h_select_key,
4734 ieee80211_tx_h_michael_mic_add,
4735 ieee80211_tx_h_fragment,
4736 ieee80211_tx_h_tkip_encrypt,
4737 ieee80211_tx_h_ccmp_encrypt,
4738 ieee80211_tx_h_wep_encrypt,
4739 ieee80211_tx_h_rate_ctrl,
4740 ieee80211_tx_h_misc,
4741 ieee80211_tx_h_load_stats,
4742 NULL
4743};
4744
4745
4746int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
4747{
4748 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4749 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4750 struct sta_info *sta;
4751
4752 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
4753 return 0;
4754
4755 /* Create STA entry for the new peer */
4756 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
4757 if (!sta)
4758 return -ENOMEM;
4759 sta_info_put(sta);
4760
4761 /* Remove STA entry for the old peer */
4762 sta = sta_info_get(local, sdata->u.wds.remote_addr);
4763 if (sta) {
4764 sta_info_put(sta);
4765 sta_info_free(sta, 0);
4766 } else {
4767 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
4768 "peer " MAC_FMT "\n",
4769 dev->name, MAC_ARG(sdata->u.wds.remote_addr));
4770 }
4771
4772 /* Update WDS link data */
4773 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
4774
4775 return 0;
4776}
4777
4778/* Must not be called for mdev and apdev */
4779void ieee80211_if_setup(struct net_device *dev)
4780{
4781 ether_setup(dev);
4782 dev->hard_start_xmit = ieee80211_subif_start_xmit;
4783 dev->wireless_handlers = &ieee80211_iw_handler_def;
4784 dev->set_multicast_list = ieee80211_set_multicast_list;
4785 dev->change_mtu = ieee80211_change_mtu;
4786 dev->get_stats = ieee80211_get_stats;
4787 dev->open = ieee80211_open;
4788 dev->stop = ieee80211_stop;
4789 dev->uninit = ieee80211_if_reinit;
4790 dev->destructor = ieee80211_if_free;
4791}
4792
4793void ieee80211_if_mgmt_setup(struct net_device *dev)
4794{
4795 ether_setup(dev);
4796 dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
4797 dev->change_mtu = ieee80211_change_mtu_apdev;
4798 dev->get_stats = ieee80211_get_stats;
4799 dev->open = ieee80211_mgmt_open;
4800 dev->stop = ieee80211_mgmt_stop;
4801 dev->type = ARPHRD_IEEE80211_PRISM;
4802 dev->hard_header_parse = header_parse_80211;
4803 dev->uninit = ieee80211_if_reinit;
4804 dev->destructor = ieee80211_if_free;
4805}
4806
4807int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
4808 const char *name)
4809{
4810 struct rate_control_ref *ref, *old;
4811
4812 ASSERT_RTNL();
4813 if (local->open_count || netif_running(local->mdev) ||
4814 (local->apdev && netif_running(local->apdev)))
4815 return -EBUSY;
4816
4817 ref = rate_control_alloc(name, local);
4818 if (!ref) {
4819 printk(KERN_WARNING "%s: Failed to select rate control "
4820 "algorithm\n", local->mdev->name);
4821 return -ENOENT;
4822 }
4823
4824 old = local->rate_ctrl;
4825 local->rate_ctrl = ref;
4826 if (old) {
4827 rate_control_put(old);
4828 sta_info_flush(local, NULL);
4829 }
4830
4831 printk(KERN_DEBUG "%s: Selected rate control "
4832 "algorithm '%s'\n", local->mdev->name,
4833 ref->ops->name);
4834
4835
4836 return 0;
4837}
4838
4839static void rate_control_deinitialize(struct ieee80211_local *local)
4840{
4841 struct rate_control_ref *ref;
4842
4843 ref = local->rate_ctrl;
4844 local->rate_ctrl = NULL;
4845 rate_control_put(ref);
4846}
4847
4848struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
4849 const struct ieee80211_ops *ops)
4850{
4851 struct net_device *mdev;
4852 struct ieee80211_local *local;
4853 struct ieee80211_sub_if_data *sdata;
4854 int priv_size;
4855 struct wiphy *wiphy;
4856
4857 /* Ensure 32-byte alignment of our private data and hw private data.
4858 * We use the wiphy priv data for both our ieee80211_local and for
4859 * the driver's private data
4860 *
4861 * In memory it'll be like this:
4862 *
4863 * +-------------------------+
4864 * | struct wiphy |
4865 * +-------------------------+
4866 * | struct ieee80211_local |
4867 * +-------------------------+
4868 * | driver's private data |
4869 * +-------------------------+
4870 *
4871 */
4872 priv_size = ((sizeof(struct ieee80211_local) +
4873 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
4874 priv_data_len;
4875
4876 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
4877
4878 if (!wiphy)
4879 return NULL;
4880
4881 wiphy->privid = mac80211_wiphy_privid;
4882
4883 local = wiphy_priv(wiphy);
4884 local->hw.wiphy = wiphy;
4885
4886 local->hw.priv = (char *)local +
4887 ((sizeof(struct ieee80211_local) +
4888 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
4889
4480f15c
JB		 4890 BUG_ON(!ops->tx);
4891 BUG_ON(!ops->config);
4892 BUG_ON(!ops->add_interface);
f0706e82
JB		 4893 local->ops = ops;
4894
4895 /* for now, mdev needs sub_if_data :/ */
4896 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
4897 "wmaster%d", ether_setup);
4898 if (!mdev) {
4899 wiphy_free(wiphy);
4900 return NULL;
4901 }
4902
4903 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
4904 mdev->ieee80211_ptr = &sdata->wdev;
4905 sdata->wdev.wiphy = wiphy;
4906
4907 local->hw.queues = 1; /* default */
4908
4909 local->mdev = mdev;
4910 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
4911 local->rx_handlers = ieee80211_rx_handlers;
4912 local->tx_handlers = ieee80211_tx_handlers;
4913
4914 local->bridge_packets = 1;
4915
4916 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
4917 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
4918 local->short_retry_limit = 7;
4919 local->long_retry_limit = 4;
4920 local->hw.conf.radio_enabled = 1;
f0706e82
JB		 4921
4922 local->enabled_modes = (unsigned int) -1;
4923
4924 INIT_LIST_HEAD(&local->modes_list);
4925
4926 rwlock_init(&local->sub_if_lock);
4927 INIT_LIST_HEAD(&local->sub_if_list);
4928
4929 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
4930 init_timer(&local->stat_timer);
4931 local->stat_timer.function = ieee80211_stat_refresh;
4932 local->stat_timer.data = (unsigned long) local;
4933 ieee80211_rx_bss_list_init(mdev);
4934
4935 sta_info_init(local);
4936
4937 mdev->hard_start_xmit = ieee80211_master_start_xmit;
4938 mdev->open = ieee80211_master_open;
4939 mdev->stop = ieee80211_master_stop;
4940 mdev->type = ARPHRD_IEEE80211;
4941 mdev->hard_header_parse = header_parse_80211;
4942
4943 sdata->type = IEEE80211_IF_TYPE_AP;
4944 sdata->dev = mdev;
4945 sdata->local = local;
4946 sdata->u.ap.force_unicast_rateidx = -1;
4947 sdata->u.ap.max_ratectrl_rateidx = -1;
4948 ieee80211_if_sdata_init(sdata);
4949 list_add_tail(&sdata->list, &local->sub_if_list);
4950
4951 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
4952 (unsigned long)local);
4953 tasklet_disable(&local->tx_pending_tasklet);
4954
4955 tasklet_init(&local->tasklet,
4956 ieee80211_tasklet_handler,
4957 (unsigned long) local);
4958 tasklet_disable(&local->tasklet);
4959
4960 skb_queue_head_init(&local->skb_queue);
4961 skb_queue_head_init(&local->skb_queue_unreliable);
4962
4963 return local_to_hw(local);
4964}
4965EXPORT_SYMBOL(ieee80211_alloc_hw);
4966
4967int ieee80211_register_hw(struct ieee80211_hw *hw)
4968{
4969 struct ieee80211_local *local = hw_to_local(hw);
4970 const char *name;
4971 int result;
4972
4973 result = wiphy_register(local->hw.wiphy);
4974 if (result < 0)
4975 return result;
4976
4977 name = wiphy_dev(local->hw.wiphy)->driver->name;
4978 local->hw.workqueue = create_singlethread_workqueue(name);
4979 if (!local->hw.workqueue) {
4980 result = -ENOMEM;
4981 goto fail_workqueue;
4982 }
4983
b306f453
JB		 4984 /*
4985 * The hardware needs headroom for sending the frame,
4986 * and we need some headroom for passing the frame to monitor
4987 * interfaces, but never both at the same time.
4988 */
33ccad35
JB		 4989 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
4990 sizeof(struct ieee80211_tx_status_rtap_hdr));
b306f453 4991
e9f207f0
JB		 4992 debugfs_hw_add(local);
4993
f0706e82
JB		 4994 local->hw.conf.beacon_int = 1000;
4995
4996 local->wstats_flags |= local->hw.max_rssi ?
4997 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
4998 local->wstats_flags |= local->hw.max_signal ?
4999 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
5000 local->wstats_flags |= local->hw.max_noise ?
5001 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
5002 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
5003 local->wstats_flags |= IW_QUAL_DBM;
5004
5005 result = sta_info_start(local);
5006 if (result < 0)
5007 goto fail_sta_info;
5008
5009 rtnl_lock();
5010 result = dev_alloc_name(local->mdev, local->mdev->name);
5011 if (result < 0)
5012 goto fail_dev;
5013
5014 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
5015 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
5016
5017 result = register_netdevice(local->mdev);
5018 if (result < 0)
5019 goto fail_dev;
5020
e9f207f0
JB		 5021 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
5022
f0706e82
JB		 5023 result = ieee80211_init_rate_ctrl_alg(local, NULL);
5024 if (result < 0) {
5025 printk(KERN_DEBUG "%s: Failed to initialize rate control "
5026 "algorithm\n", local->mdev->name);
5027 goto fail_rate;
5028 }
5029
5030 result = ieee80211_wep_init(local);
5031
5032 if (result < 0) {
5033 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
5034 local->mdev->name);
5035 goto fail_wep;
5036 }
5037
5038 ieee80211_install_qdisc(local->mdev);
5039
5040 /* add one default STA interface */
5041 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
5042 IEEE80211_IF_TYPE_STA);
5043 if (result)
5044 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
5045 local->mdev->name);
5046
5047 local->reg_state = IEEE80211_DEV_REGISTERED;
5048 rtnl_unlock();
5049
5050 ieee80211_led_init(local);
5051
5052 return 0;
5053
5054fail_wep:
5055 rate_control_deinitialize(local);
5056fail_rate:
e9f207f0 5057 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
f0706e82
JB		 5058 unregister_netdevice(local->mdev);
5059fail_dev:
5060 rtnl_unlock();
5061 sta_info_stop(local);
5062fail_sta_info:
e9f207f0 5063 debugfs_hw_del(local);
f0706e82
JB		 5064 destroy_workqueue(local->hw.workqueue);
5065fail_workqueue:
5066 wiphy_unregister(local->hw.wiphy);
5067 return result;
5068}
5069EXPORT_SYMBOL(ieee80211_register_hw);
5070
5071int ieee80211_register_hwmode(struct ieee80211_hw *hw,
5072 struct ieee80211_hw_mode *mode)
5073{
5074 struct ieee80211_local *local = hw_to_local(hw);
5075 struct ieee80211_rate *rate;
5076 int i;
5077
5078 INIT_LIST_HEAD(&mode->list);
5079 list_add_tail(&mode->list, &local->modes_list);
5080
5081 local->hw_modes |= (1 << mode->mode);
5082 for (i = 0; i < mode->num_rates; i++) {
5083 rate = &(mode->rates[i]);
5084 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
5085 }
5086 ieee80211_prepare_rates(local, mode);
5087
5088 if (!local->oper_hw_mode) {
5089 /* Default to this mode */
5090 local->hw.conf.phymode = mode->mode;
5091 local->oper_hw_mode = local->scan_hw_mode = mode;
5092 local->oper_channel = local->scan_channel = &mode->channels[0];
5093 local->hw.conf.mode = local->oper_hw_mode;
5094 local->hw.conf.chan = local->oper_channel;
5095 }
5096
5097 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
fd8bacc9 5098 ieee80211_set_default_regdomain(mode);
f0706e82
JB		 5099
5100 return 0;
5101}
5102EXPORT_SYMBOL(ieee80211_register_hwmode);
5103
5104void ieee80211_unregister_hw(struct ieee80211_hw *hw)
5105{
5106 struct ieee80211_local *local = hw_to_local(hw);
5107 struct ieee80211_sub_if_data *sdata, *tmp;
5108 struct list_head tmp_list;
5109 int i;
5110
5111 tasklet_kill(&local->tx_pending_tasklet);
5112 tasklet_kill(&local->tasklet);
5113
5114 rtnl_lock();
5115
5116 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
5117
5118 local->reg_state = IEEE80211_DEV_UNREGISTERED;
5119 if (local->apdev)
5120 ieee80211_if_del_mgmt(local);
5121
5122 write_lock_bh(&local->sub_if_lock);
5123 list_replace_init(&local->sub_if_list, &tmp_list);
5124 write_unlock_bh(&local->sub_if_lock);
5125
5126 list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
5127 __ieee80211_if_del(local, sdata);
5128
5129 rtnl_unlock();
5130
5131 if (local->stat_time)
5132 del_timer_sync(&local->stat_timer);
5133
5134 ieee80211_rx_bss_list_deinit(local->mdev);
5135 ieee80211_clear_tx_pending(local);
5136 sta_info_stop(local);
5137 rate_control_deinitialize(local);
e9f207f0 5138 debugfs_hw_del(local);
f0706e82
JB		 5139
5140 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
5141 kfree(local->supp_rates[i]);
5142 kfree(local->basic_rates[i]);
5143 }
5144
5145 if (skb_queue_len(&local->skb_queue)
5146 || skb_queue_len(&local->skb_queue_unreliable))
5147 printk(KERN_WARNING "%s: skb_queue not empty\n",
5148 local->mdev->name);
5149 skb_queue_purge(&local->skb_queue);
5150 skb_queue_purge(&local->skb_queue_unreliable);
5151
5152 destroy_workqueue(local->hw.workqueue);
5153 wiphy_unregister(local->hw.wiphy);
5154 ieee80211_wep_free(local);
5155 ieee80211_led_exit(local);
5156}
5157EXPORT_SYMBOL(ieee80211_unregister_hw);
5158
5159void ieee80211_free_hw(struct ieee80211_hw *hw)
5160{
5161 struct ieee80211_local *local = hw_to_local(hw);
5162
5163 ieee80211_if_free(local->mdev);
5164 wiphy_free(local->hw.wiphy);
5165}
5166EXPORT_SYMBOL(ieee80211_free_hw);
5167
5168void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
5169{
5170 struct ieee80211_local *local = hw_to_local(hw);
5171
5172 if (test_and_clear_bit(IEEE80211_LINK_STATE_XOFF,
5173 &local->state[queue])) {
5174 if (test_bit(IEEE80211_LINK_STATE_PENDING,
5175 &local->state[queue]))
5176 tasklet_schedule(&local->tx_pending_tasklet);
5177 else
5178 if (!ieee80211_qdisc_installed(local->mdev)) {
5179 if (queue == 0)
5180 netif_wake_queue(local->mdev);
5181 } else
5182 __netif_schedule(local->mdev);
5183 }
5184}
5185EXPORT_SYMBOL(ieee80211_wake_queue);
5186
5187void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
5188{
5189 struct ieee80211_local *local = hw_to_local(hw);
5190
5191 if (!ieee80211_qdisc_installed(local->mdev) && queue == 0)
5192 netif_stop_queue(local->mdev);
5193 set_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]);
5194}
5195EXPORT_SYMBOL(ieee80211_stop_queue);
5196
5197void ieee80211_start_queues(struct ieee80211_hw *hw)
5198{
5199 struct ieee80211_local *local = hw_to_local(hw);
5200 int i;
5201
5202 for (i = 0; i < local->hw.queues; i++)
5203 clear_bit(IEEE80211_LINK_STATE_XOFF, &local->state[i]);
5204 if (!ieee80211_qdisc_installed(local->mdev))
5205 netif_start_queue(local->mdev);
5206}
5207EXPORT_SYMBOL(ieee80211_start_queues);
5208
5209void ieee80211_stop_queues(struct ieee80211_hw *hw)
5210{
5211 int i;
5212
5213 for (i = 0; i < hw->queues; i++)
5214 ieee80211_stop_queue(hw, i);
5215}
5216EXPORT_SYMBOL(ieee80211_stop_queues);
5217
5218void ieee80211_wake_queues(struct ieee80211_hw *hw)
5219{
5220 int i;
5221
5222 for (i = 0; i < hw->queues; i++)
5223 ieee80211_wake_queue(hw, i);
5224}
5225EXPORT_SYMBOL(ieee80211_wake_queues);
5226
5227struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
5228{
5229 struct ieee80211_sub_if_data *sdata;
5230 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5231 return &sdata->stats;
5232}
5233
5234static int __init ieee80211_init(void)
5235{
5236 struct sk_buff *skb;
5237 int ret;
5238
5239 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
5240
5241 ret = ieee80211_wme_register();
5242 if (ret) {
5243 printk(KERN_DEBUG "ieee80211_init: failed to "
5244 "initialize WME (err=%d)\n", ret);
5245 return ret;
5246 }
5247
e9f207f0 5248 ieee80211_debugfs_netdev_init();
fd8bacc9 5249 ieee80211_regdomain_init();
e9f207f0 5250
f0706e82
JB		 5251 return 0;
5252}
5253
5254
5255static void __exit ieee80211_exit(void)
5256{
5257 ieee80211_wme_unregister();
e9f207f0 5258 ieee80211_debugfs_netdev_exit();
f0706e82
JB		 5259}
5260
5261
5262module_init(ieee80211_init);
5263module_exit(ieee80211_exit);
5264
5265MODULE_DESCRIPTION("IEEE 802.11 subsystem");
5266MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)