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ACPI: thinkpad-acpi: fix regression on HKEY LID event handling
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / ieee80211.c
blob9e0da6e8c443cf6b20a68e926251e6bc0197a6bc
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>
27 #include <asm/unaligned.h>
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"
39 #include "debugfs.h"
40 #include "debugfs_netdev.h"
41 #include "debugfs_key.h"
42
43 /* privid for wiphys to determine whether they belong to us or not */
44 void *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) */
48 static 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) */
52 static const unsigned char bridge_tunnel_header[] =
53 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
54
55 /* No encapsulation header if EtherType < 0x600 (=length) */
56 static const unsigned char eapol_header[] =
57 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00, 0x88, 0x8e };
58
59
60 /*
61 * For seeing transmitted packets on monitor interfaces
62 * we have a radiotap header too.
63 */
64 struct ieee80211_tx_status_rtap_hdr {
65 struct ieee80211_radiotap_header hdr;
66 __le16 tx_flags;
67 u8 data_retries;
68 } __attribute__ ((packed));
69
70
71 static 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
81 struct ieee80211_key_conf *
82 ieee80211_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
107 struct 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
119 static 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);
126 ieee80211_debugfs_key_remove(key);
127 kfree(key);
128 }
129
130 void ieee80211_key_free(struct ieee80211_key *key)
131 {
132 if (key)
133 kref_put(&key->kref, ieee80211_key_release);
134 }
135
136 static 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
151 void 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
225 static 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
261 static 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
295 int 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 }
332 EXPORT_SYMBOL(ieee80211_get_hdrlen);
333
334 int 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 }
346 EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
347
348 static 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(get_unaligned(&hdr->it_len));
354 }
355
356 #ifdef CONFIG_MAC80211_LOWTX_FRAME_DUMP
357 static 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 */
388 static 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
395 static 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
421 static ieee80211_txrx_result
422 ieee80211_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 &&
445 tx->sdata->use_protection && tx->fragmented &&
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
469 static ieee80211_txrx_result
470 ieee80211_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
504 static ieee80211_txrx_result
505 ieee80211_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] =
543 dev_alloc_skb(tx->local->tx_headroom +
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;
552 skb_reserve(frag, tx->local->tx_headroom +
553 IEEE80211_ENCRYPT_HEADROOM);
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
585 static 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
602 void 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
619 static ieee80211_txrx_result
620 ieee80211_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
657 static 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 }
727 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
728
729
730 static 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
836 static ieee80211_txrx_result
837 ieee80211_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) &&
871 tx->u.tx.unicast && tx->sdata->use_protection &&
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
918 static ieee80211_txrx_result
919 ieee80211_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
977 static ieee80211_txrx_result
978 ieee80211_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. */
992 static 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
1032 static inline ieee80211_txrx_result
1033 ieee80211_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
1062 static inline ieee80211_txrx_result
1063 ieee80211_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
1119 static ieee80211_txrx_result
1120 ieee80211_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
1132 /*
1133 * deal with packet injection down monitor interface
1134 * with Radiotap Header -- only called for monitor mode interface
1135 */
1136
1137 static 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
1263 static ieee80211_txrx_result inline
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;
1271 struct ieee80211_sub_if_data *sdata;
1272 ieee80211_txrx_result res = TXRX_CONTINUE;
1273
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);
1283
1284 /*
1285 * set defaults for things that can be set by
1286 * injected radiotap headers
1287 */
1288 control->power_level = local->hw.conf.power_level;
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
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 }
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
1332 return res;
1333 }
1334
1335 static 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. */
1344 static 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
1364 static 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
1370 static 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
1380 static 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
1438 static 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;
1445 ieee80211_txrx_result res = TXRX_DROP, res_prepare;
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
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
1462 sta = tx.sta;
1463 tx.u.tx.mgmt_interface = mgmt;
1464 tx.u.tx.mode = local->hw.conf.mode;
1465
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 }
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
1511 retry:
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
1557 static 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
1600 static 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
1617 static 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
1649 headroom = osdata->local->tx_headroom + IEEE80211_ENCRYPT_HEADROOM;
1650 if (skb_headroom(skb) < headroom) {
1651 if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) {
1652 dev_kfree_skb(skb);
1653 dev_put(odev);
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
1676 int 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_rthdr;
1684
1685 /* check for not even having the fixed radiotap header part */
1686 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
1687 goto fail; /* too short to be possibly valid */
1688
1689 /* is it a header version we can trust to find length from? */
1690 if (unlikely(prthdr->it_version))
1691 goto fail; /* only version 0 is supported */
1692
1693 /* then there must be a radiotap header with a length we can use */
1694 len_rthdr = ieee80211_get_radiotap_len(skb);
1695
1696 /* does the skb contain enough to deliver on the alleged length? */
1697 if (unlikely(skb->len < len_rthdr))
1698 goto fail; /* skb too short for claimed rt header extent */
1699
1700 skb->dev = local->mdev;
1701
1702 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
1703 memset(pkt_data, 0, sizeof(*pkt_data));
1704 /* needed because we set skb device to master */
1705 pkt_data->ifindex = dev->ifindex;
1706
1707 pkt_data->mgmt_iface = 0;
1708 pkt_data->do_not_encrypt = 1;
1709
1710 /*
1711 * fix up the pointers accounting for the radiotap
1712 * header still being in there. We are being given
1713 * a precooked IEEE80211 header so no need for
1714 * normal processing
1715 */
1716 skb_set_mac_header(skb, len_rthdr);
1717 /*
1718 * these are just fixed to the end of the rt area since we
1719 * don't have any better information and at this point, nobody cares
1720 */
1721 skb_set_network_header(skb, len_rthdr);
1722 skb_set_transport_header(skb, len_rthdr);
1723
1724 /* pass the radiotap header up to the next stage intact */
1725 dev_queue_xmit(skb);
1726 return NETDEV_TX_OK;
1727
1728 fail:
1729 dev_kfree_skb(skb);
1730 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
1731 }
1732
1733
1734 /**
1735 * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type
1736 * subinterfaces (wlan#, WDS, and VLAN interfaces)
1737 * @skb: packet to be sent
1738 * @dev: incoming interface
1739 *
1740 * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will
1741 * not be freed, and caller is responsible for either retrying later or freeing
1742 * skb).
1743 *
1744 * This function takes in an Ethernet header and encapsulates it with suitable
1745 * IEEE 802.11 header based on which interface the packet is coming in. The
1746 * encapsulated packet will then be passed to master interface, wlan#.11, for
1747 * transmission (through low-level driver).
1748 */
1749 int ieee80211_subif_start_xmit(struct sk_buff *skb,
1750 struct net_device *dev)
1751 {
1752 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1753 struct ieee80211_tx_packet_data *pkt_data;
1754 struct ieee80211_sub_if_data *sdata;
1755 int ret = 1, head_need;
1756 u16 ethertype, hdrlen, fc;
1757 struct ieee80211_hdr hdr;
1758 const u8 *encaps_data;
1759 int encaps_len, skip_header_bytes;
1760 int nh_pos, h_pos, no_encrypt = 0;
1761 struct sta_info *sta;
1762
1763 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1764 if (unlikely(skb->len < ETH_HLEN)) {
1765 printk(KERN_DEBUG "%s: short skb (len=%d)\n",
1766 dev->name, skb->len);
1767 ret = 0;
1768 goto fail;
1769 }
1770
1771 nh_pos = skb_network_header(skb) - skb->data;
1772 h_pos = skb_transport_header(skb) - skb->data;
1773
1774 /* convert Ethernet header to proper 802.11 header (based on
1775 * operation mode) */
1776 ethertype = (skb->data[12] << 8) | skb->data[13];
1777 /* TODO: handling for 802.1x authorized/unauthorized port */
1778 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA;
1779
1780 if (likely(sdata->type == IEEE80211_IF_TYPE_AP ||
1781 sdata->type == IEEE80211_IF_TYPE_VLAN)) {
1782 fc |= IEEE80211_FCTL_FROMDS;
1783 /* DA BSSID SA */
1784 memcpy(hdr.addr1, skb->data, ETH_ALEN);
1785 memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN);
1786 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
1787 hdrlen = 24;
1788 } else if (sdata->type == IEEE80211_IF_TYPE_WDS) {
1789 fc |= IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS;
1790 /* RA TA DA SA */
1791 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
1792 memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN);
1793 memcpy(hdr.addr3, skb->data, ETH_ALEN);
1794 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
1795 hdrlen = 30;
1796 } else if (sdata->type == IEEE80211_IF_TYPE_STA) {
1797 fc |= IEEE80211_FCTL_TODS;
1798 /* BSSID SA DA */
1799 memcpy(hdr.addr1, sdata->u.sta.bssid, ETH_ALEN);
1800 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
1801 memcpy(hdr.addr3, skb->data, ETH_ALEN);
1802 hdrlen = 24;
1803 } else if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
1804 /* DA SA BSSID */
1805 memcpy(hdr.addr1, skb->data, ETH_ALEN);
1806 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
1807 memcpy(hdr.addr3, sdata->u.sta.bssid, ETH_ALEN);
1808 hdrlen = 24;
1809 } else {
1810 ret = 0;
1811 goto fail;
1812 }
1813
1814 /* receiver is QoS enabled, use a QoS type frame */
1815 sta = sta_info_get(local, hdr.addr1);
1816 if (sta) {
1817 if (sta->flags & WLAN_STA_WME) {
1818 fc |= IEEE80211_STYPE_QOS_DATA;
1819 hdrlen += 2;
1820 }
1821 sta_info_put(sta);
1822 }
1823
1824 hdr.frame_control = cpu_to_le16(fc);
1825 hdr.duration_id = 0;
1826 hdr.seq_ctrl = 0;
1827
1828 skip_header_bytes = ETH_HLEN;
1829 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
1830 encaps_data = bridge_tunnel_header;
1831 encaps_len = sizeof(bridge_tunnel_header);
1832 skip_header_bytes -= 2;
1833 } else if (ethertype >= 0x600) {
1834 encaps_data = rfc1042_header;
1835 encaps_len = sizeof(rfc1042_header);
1836 skip_header_bytes -= 2;
1837 } else {
1838 encaps_data = NULL;
1839 encaps_len = 0;
1840 }
1841
1842 skb_pull(skb, skip_header_bytes);
1843 nh_pos -= skip_header_bytes;
1844 h_pos -= skip_header_bytes;
1845
1846 /* TODO: implement support for fragments so that there is no need to
1847 * reallocate and copy payload; it might be enough to support one
1848 * extra fragment that would be copied in the beginning of the frame
1849 * data.. anyway, it would be nice to include this into skb structure
1850 * somehow
1851 *
1852 * There are few options for this:
1853 * use skb->cb as an extra space for 802.11 header
1854 * allocate new buffer if not enough headroom
1855 * make sure that there is enough headroom in every skb by increasing
1856 * build in headroom in __dev_alloc_skb() (linux/skbuff.h) and
1857 * alloc_skb() (net/core/skbuff.c)
1858 */
1859 head_need = hdrlen + encaps_len + local->tx_headroom;
1860 head_need -= skb_headroom(skb);
1861
1862 /* We are going to modify skb data, so make a copy of it if happens to
1863 * be cloned. This could happen, e.g., with Linux bridge code passing
1864 * us broadcast frames. */
1865
1866 if (head_need > 0 || skb_cloned(skb)) {
1867 #if 0
1868 printk(KERN_DEBUG "%s: need to reallocate buffer for %d bytes "
1869 "of headroom\n", dev->name, head_need);
1870 #endif
1871
1872 if (skb_cloned(skb))
1873 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
1874 else
1875 I802_DEBUG_INC(local->tx_expand_skb_head);
1876 /* Since we have to reallocate the buffer, make sure that there
1877 * is enough room for possible WEP IV/ICV and TKIP (8 bytes
1878 * before payload and 12 after). */
1879 if (pskb_expand_head(skb, (head_need > 0 ? head_need + 8 : 8),
1880 12, GFP_ATOMIC)) {
1881 printk(KERN_DEBUG "%s: failed to reallocate TX buffer"
1882 "\n", dev->name);
1883 goto fail;
1884 }
1885 }
1886
1887 if (encaps_data) {
1888 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
1889 nh_pos += encaps_len;
1890 h_pos += encaps_len;
1891 }
1892 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
1893 nh_pos += hdrlen;
1894 h_pos += hdrlen;
1895
1896 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
1897 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
1898 pkt_data->ifindex = dev->ifindex;
1899 pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
1900 pkt_data->do_not_encrypt = no_encrypt;
1901
1902 skb->dev = local->mdev;
1903 sdata->stats.tx_packets++;
1904 sdata->stats.tx_bytes += skb->len;
1905
1906 /* Update skb pointers to various headers since this modified frame
1907 * is going to go through Linux networking code that may potentially
1908 * need things like pointer to IP header. */
1909 skb_set_mac_header(skb, 0);
1910 skb_set_network_header(skb, nh_pos);
1911 skb_set_transport_header(skb, h_pos);
1912
1913 dev->trans_start = jiffies;
1914 dev_queue_xmit(skb);
1915
1916 return 0;
1917
1918 fail:
1919 if (!ret)
1920 dev_kfree_skb(skb);
1921
1922 return ret;
1923 }
1924
1925
1926 /*
1927 * This is the transmit routine for the 802.11 type interfaces
1928 * called by upper layers of the linux networking
1929 * stack when it has a frame to transmit
1930 */
1931 static int
1932 ieee80211_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev)
1933 {
1934 struct ieee80211_sub_if_data *sdata;
1935 struct ieee80211_tx_packet_data *pkt_data;
1936 struct ieee80211_hdr *hdr;
1937 u16 fc;
1938
1939 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1940
1941 if (skb->len < 10) {
1942 dev_kfree_skb(skb);
1943 return 0;
1944 }
1945
1946 if (skb_headroom(skb) < sdata->local->tx_headroom) {
1947 if (pskb_expand_head(skb, sdata->local->tx_headroom,
1948 0, GFP_ATOMIC)) {
1949 dev_kfree_skb(skb);
1950 return 0;
1951 }
1952 }
1953
1954 hdr = (struct ieee80211_hdr *) skb->data;
1955 fc = le16_to_cpu(hdr->frame_control);
1956
1957 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
1958 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
1959 pkt_data->ifindex = sdata->dev->ifindex;
1960 pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
1961
1962 skb->priority = 20; /* use hardcoded priority for mgmt TX queue */
1963 skb->dev = sdata->local->mdev;
1964
1965 /*
1966 * We're using the protocol field of the the frame control header
1967 * to request TX callback for hostapd. BIT(1) is checked.
1968 */
1969 if ((fc & BIT(1)) == BIT(1)) {
1970 pkt_data->req_tx_status = 1;
1971 fc &= ~BIT(1);
1972 hdr->frame_control = cpu_to_le16(fc);
1973 }
1974
1975 pkt_data->do_not_encrypt = !(fc & IEEE80211_FCTL_PROTECTED);
1976
1977 sdata->stats.tx_packets++;
1978 sdata->stats.tx_bytes += skb->len;
1979
1980 dev_queue_xmit(skb);
1981
1982 return 0;
1983 }
1984
1985
1986 static void ieee80211_beacon_add_tim(struct ieee80211_local *local,
1987 struct ieee80211_if_ap *bss,
1988 struct sk_buff *skb)
1989 {
1990 u8 *pos, *tim;
1991 int aid0 = 0;
1992 int i, have_bits = 0, n1, n2;
1993
1994 /* Generate bitmap for TIM only if there are any STAs in power save
1995 * mode. */
1996 spin_lock_bh(&local->sta_lock);
1997 if (atomic_read(&bss->num_sta_ps) > 0)
1998 /* in the hope that this is faster than
1999 * checking byte-for-byte */
2000 have_bits = !bitmap_empty((unsigned long*)bss->tim,
2001 IEEE80211_MAX_AID+1);
2002
2003 if (bss->dtim_count == 0)
2004 bss->dtim_count = bss->dtim_period - 1;
2005 else
2006 bss->dtim_count--;
2007
2008 tim = pos = (u8 *) skb_put(skb, 6);
2009 *pos++ = WLAN_EID_TIM;
2010 *pos++ = 4;
2011 *pos++ = bss->dtim_count;
2012 *pos++ = bss->dtim_period;
2013
2014 if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf))
2015 aid0 = 1;
2016
2017 if (have_bits) {
2018 /* Find largest even number N1 so that bits numbered 1 through
2019 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
2020 * (N2 + 1) x 8 through 2007 are 0. */
2021 n1 = 0;
2022 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
2023 if (bss->tim[i]) {
2024 n1 = i & 0xfe;
2025 break;
2026 }
2027 }
2028 n2 = n1;
2029 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
2030 if (bss->tim[i]) {
2031 n2 = i;
2032 break;
2033 }
2034 }
2035
2036 /* Bitmap control */
2037 *pos++ = n1 | aid0;
2038 /* Part Virt Bitmap */
2039 memcpy(pos, bss->tim + n1, n2 - n1 + 1);
2040
2041 tim[1] = n2 - n1 + 4;
2042 skb_put(skb, n2 - n1);
2043 } else {
2044 *pos++ = aid0; /* Bitmap control */
2045 *pos++ = 0; /* Part Virt Bitmap */
2046 }
2047 spin_unlock_bh(&local->sta_lock);
2048 }
2049
2050
2051 struct sk_buff * ieee80211_beacon_get(struct ieee80211_hw *hw, int if_id,
2052 struct ieee80211_tx_control *control)
2053 {
2054 struct ieee80211_local *local = hw_to_local(hw);
2055 struct sk_buff *skb;
2056 struct net_device *bdev;
2057 struct ieee80211_sub_if_data *sdata = NULL;
2058 struct ieee80211_if_ap *ap = NULL;
2059 struct ieee80211_rate *rate;
2060 struct rate_control_extra extra;
2061 u8 *b_head, *b_tail;
2062 int bh_len, bt_len;
2063
2064 bdev = dev_get_by_index(if_id);
2065 if (bdev) {
2066 sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
2067 ap = &sdata->u.ap;
2068 dev_put(bdev);
2069 }
2070
2071 if (!ap || sdata->type != IEEE80211_IF_TYPE_AP ||
2072 !ap->beacon_head) {
2073 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2074 if (net_ratelimit())
2075 printk(KERN_DEBUG "no beacon data avail for idx=%d "
2076 "(%s)\n", if_id, bdev ? bdev->name : "N/A");
2077 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
2078 return NULL;
2079 }
2080
2081 /* Assume we are generating the normal beacon locally */
2082 b_head = ap->beacon_head;
2083 b_tail = ap->beacon_tail;
2084 bh_len = ap->beacon_head_len;
2085 bt_len = ap->beacon_tail_len;
2086
2087 skb = dev_alloc_skb(local->tx_headroom +
2088 bh_len + bt_len + 256 /* maximum TIM len */);
2089 if (!skb)
2090 return NULL;
2091
2092 skb_reserve(skb, local->tx_headroom);
2093 memcpy(skb_put(skb, bh_len), b_head, bh_len);
2094
2095 ieee80211_include_sequence(sdata, (struct ieee80211_hdr *)skb->data);
2096
2097 ieee80211_beacon_add_tim(local, ap, skb);
2098
2099 if (b_tail) {
2100 memcpy(skb_put(skb, bt_len), b_tail, bt_len);
2101 }
2102
2103 if (control) {
2104 memset(&extra, 0, sizeof(extra));
2105 extra.mode = local->oper_hw_mode;
2106
2107 rate = rate_control_get_rate(local, local->mdev, skb, &extra);
2108 if (!rate) {
2109 if (net_ratelimit()) {
2110 printk(KERN_DEBUG "%s: ieee80211_beacon_get: no rate "
2111 "found\n", local->mdev->name);
2112 }
2113 dev_kfree_skb(skb);
2114 return NULL;
2115 }
2116
2117 control->tx_rate = (local->short_preamble &&
2118 (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2119 rate->val2 : rate->val;
2120 control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2121 control->power_level = local->hw.conf.power_level;
2122 control->flags |= IEEE80211_TXCTL_NO_ACK;
2123 control->retry_limit = 1;
2124 control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK;
2125 }
2126
2127 ap->num_beacons++;
2128 return skb;
2129 }
2130 EXPORT_SYMBOL(ieee80211_beacon_get);
2131
2132 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
2133 size_t frame_len,
2134 const struct ieee80211_tx_control *frame_txctl)
2135 {
2136 struct ieee80211_local *local = hw_to_local(hw);
2137 struct ieee80211_rate *rate;
2138 int short_preamble = local->short_preamble;
2139 int erp;
2140 u16 dur;
2141
2142 rate = frame_txctl->rts_rate;
2143 erp = !!(rate->flags & IEEE80211_RATE_ERP);
2144
2145 /* CTS duration */
2146 dur = ieee80211_frame_duration(local, 10, rate->rate,
2147 erp, short_preamble);
2148 /* Data frame duration */
2149 dur += ieee80211_frame_duration(local, frame_len, rate->rate,
2150 erp, short_preamble);
2151 /* ACK duration */
2152 dur += ieee80211_frame_duration(local, 10, rate->rate,
2153 erp, short_preamble);
2154
2155 return cpu_to_le16(dur);
2156 }
2157 EXPORT_SYMBOL(ieee80211_rts_duration);
2158
2159
2160 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
2161 size_t frame_len,
2162 const struct ieee80211_tx_control *frame_txctl)
2163 {
2164 struct ieee80211_local *local = hw_to_local(hw);
2165 struct ieee80211_rate *rate;
2166 int short_preamble = local->short_preamble;
2167 int erp;
2168 u16 dur;
2169
2170 rate = frame_txctl->rts_rate;
2171 erp = !!(rate->flags & IEEE80211_RATE_ERP);
2172
2173 /* Data frame duration */
2174 dur = ieee80211_frame_duration(local, frame_len, rate->rate,
2175 erp, short_preamble);
2176 if (!(frame_txctl->flags & IEEE80211_TXCTL_NO_ACK)) {
2177 /* ACK duration */
2178 dur += ieee80211_frame_duration(local, 10, rate->rate,
2179 erp, short_preamble);
2180 }
2181
2182 return cpu_to_le16(dur);
2183 }
2184 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
2185
2186 void ieee80211_rts_get(struct ieee80211_hw *hw,
2187 const void *frame, size_t frame_len,
2188 const struct ieee80211_tx_control *frame_txctl,
2189 struct ieee80211_rts *rts)
2190 {
2191 const struct ieee80211_hdr *hdr = frame;
2192 u16 fctl;
2193
2194 fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS;
2195 rts->frame_control = cpu_to_le16(fctl);
2196 rts->duration = ieee80211_rts_duration(hw, frame_len, frame_txctl);
2197 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
2198 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
2199 }
2200 EXPORT_SYMBOL(ieee80211_rts_get);
2201
2202 void ieee80211_ctstoself_get(struct ieee80211_hw *hw,
2203 const void *frame, size_t frame_len,
2204 const struct ieee80211_tx_control *frame_txctl,
2205 struct ieee80211_cts *cts)
2206 {
2207 const struct ieee80211_hdr *hdr = frame;
2208 u16 fctl;
2209
2210 fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS;
2211 cts->frame_control = cpu_to_le16(fctl);
2212 cts->duration = ieee80211_ctstoself_duration(hw, frame_len, frame_txctl);
2213 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
2214 }
2215 EXPORT_SYMBOL(ieee80211_ctstoself_get);
2216
2217 struct sk_buff *
2218 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id,
2219 struct ieee80211_tx_control *control)
2220 {
2221 struct ieee80211_local *local = hw_to_local(hw);
2222 struct sk_buff *skb;
2223 struct sta_info *sta;
2224 ieee80211_tx_handler *handler;
2225 struct ieee80211_txrx_data tx;
2226 ieee80211_txrx_result res = TXRX_DROP;
2227 struct net_device *bdev;
2228 struct ieee80211_sub_if_data *sdata;
2229 struct ieee80211_if_ap *bss = NULL;
2230
2231 bdev = dev_get_by_index(if_id);
2232 if (bdev) {
2233 sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
2234 bss = &sdata->u.ap;
2235 dev_put(bdev);
2236 }
2237 if (!bss || sdata->type != IEEE80211_IF_TYPE_AP || !bss->beacon_head)
2238 return NULL;
2239
2240 if (bss->dtim_count != 0)
2241 return NULL; /* send buffered bc/mc only after DTIM beacon */
2242 memset(control, 0, sizeof(*control));
2243 while (1) {
2244 skb = skb_dequeue(&bss->ps_bc_buf);
2245 if (!skb)
2246 return NULL;
2247 local->total_ps_buffered--;
2248
2249 if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) {
2250 struct ieee80211_hdr *hdr =
2251 (struct ieee80211_hdr *) skb->data;
2252 /* more buffered multicast/broadcast frames ==> set
2253 * MoreData flag in IEEE 802.11 header to inform PS
2254 * STAs */
2255 hdr->frame_control |=
2256 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2257 }
2258
2259 if (ieee80211_tx_prepare(&tx, skb, local->mdev, control) == 0)
2260 break;
2261 dev_kfree_skb_any(skb);
2262 }
2263 sta = tx.sta;
2264 tx.u.tx.ps_buffered = 1;
2265
2266 for (handler = local->tx_handlers; *handler != NULL; handler++) {
2267 res = (*handler)(&tx);
2268 if (res == TXRX_DROP || res == TXRX_QUEUED)
2269 break;
2270 }
2271 dev_put(tx.dev);
2272 skb = tx.skb; /* handlers are allowed to change skb */
2273
2274 if (res == TXRX_DROP) {
2275 I802_DEBUG_INC(local->tx_handlers_drop);
2276 dev_kfree_skb(skb);
2277 skb = NULL;
2278 } else if (res == TXRX_QUEUED) {
2279 I802_DEBUG_INC(local->tx_handlers_queued);
2280 skb = NULL;
2281 }
2282
2283 if (sta)
2284 sta_info_put(sta);
2285
2286 return skb;
2287 }
2288 EXPORT_SYMBOL(ieee80211_get_buffered_bc);
2289
2290 static int __ieee80211_if_config(struct net_device *dev,
2291 struct sk_buff *beacon,
2292 struct ieee80211_tx_control *control)
2293 {
2294 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2295 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2296 struct ieee80211_if_conf conf;
2297 static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
2298
2299 if (!local->ops->config_interface || !netif_running(dev))
2300 return 0;
2301
2302 memset(&conf, 0, sizeof(conf));
2303 conf.type = sdata->type;
2304 if (sdata->type == IEEE80211_IF_TYPE_STA ||
2305 sdata->type == IEEE80211_IF_TYPE_IBSS) {
2306 if (local->sta_scanning &&
2307 local->scan_dev == dev)
2308 conf.bssid = scan_bssid;
2309 else
2310 conf.bssid = sdata->u.sta.bssid;
2311 conf.ssid = sdata->u.sta.ssid;
2312 conf.ssid_len = sdata->u.sta.ssid_len;
2313 conf.generic_elem = sdata->u.sta.extra_ie;
2314 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
2315 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
2316 conf.ssid = sdata->u.ap.ssid;
2317 conf.ssid_len = sdata->u.ap.ssid_len;
2318 conf.generic_elem = sdata->u.ap.generic_elem;
2319 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
2320 conf.beacon = beacon;
2321 conf.beacon_control = control;
2322 }
2323 return local->ops->config_interface(local_to_hw(local),
2324 dev->ifindex, &conf);
2325 }
2326
2327 int ieee80211_if_config(struct net_device *dev)
2328 {
2329 return __ieee80211_if_config(dev, NULL, NULL);
2330 }
2331
2332 int ieee80211_if_config_beacon(struct net_device *dev)
2333 {
2334 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2335 struct ieee80211_tx_control control;
2336 struct sk_buff *skb;
2337
2338 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
2339 return 0;
2340 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
2341 if (!skb)
2342 return -ENOMEM;
2343 return __ieee80211_if_config(dev, skb, &control);
2344 }
2345
2346 int ieee80211_hw_config(struct ieee80211_local *local)
2347 {
2348 struct ieee80211_hw_mode *mode;
2349 struct ieee80211_channel *chan;
2350 int ret = 0;
2351
2352 if (local->sta_scanning) {
2353 chan = local->scan_channel;
2354 mode = local->scan_hw_mode;
2355 } else {
2356 chan = local->oper_channel;
2357 mode = local->oper_hw_mode;
2358 }
2359
2360 local->hw.conf.channel = chan->chan;
2361 local->hw.conf.channel_val = chan->val;
2362 local->hw.conf.power_level = chan->power_level;
2363 local->hw.conf.freq = chan->freq;
2364 local->hw.conf.phymode = mode->mode;
2365 local->hw.conf.antenna_max = chan->antenna_max;
2366 local->hw.conf.chan = chan;
2367 local->hw.conf.mode = mode;
2368
2369 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2370 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
2371 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
2372 local->hw.conf.phymode);
2373 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
2374
2375 if (local->ops->config)
2376 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
2377
2378 return ret;
2379 }
2380
2381
2382 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
2383 {
2384 /* FIX: what would be proper limits for MTU?
2385 * This interface uses 802.3 frames. */
2386 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
2387 printk(KERN_WARNING "%s: invalid MTU %d\n",
2388 dev->name, new_mtu);
2389 return -EINVAL;
2390 }
2391
2392 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2393 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
2394 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
2395 dev->mtu = new_mtu;
2396 return 0;
2397 }
2398
2399
2400 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
2401 {
2402 /* FIX: what would be proper limits for MTU?
2403 * This interface uses 802.11 frames. */
2404 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
2405 printk(KERN_WARNING "%s: invalid MTU %d\n",
2406 dev->name, new_mtu);
2407 return -EINVAL;
2408 }
2409
2410 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2411 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
2412 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
2413 dev->mtu = new_mtu;
2414 return 0;
2415 }
2416
2417 enum netif_tx_lock_class {
2418 TX_LOCK_NORMAL,
2419 TX_LOCK_MASTER,
2420 };
2421
2422 static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
2423 {
2424 spin_lock_nested(&dev->_xmit_lock, subclass);
2425 dev->xmit_lock_owner = smp_processor_id();
2426 }
2427
2428 static void ieee80211_set_multicast_list(struct net_device *dev)
2429 {
2430 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2431 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2432 unsigned short flags;
2433
2434 netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
2435 if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) {
2436 if (sdata->allmulti) {
2437 sdata->allmulti = 0;
2438 local->iff_allmultis--;
2439 } else {
2440 sdata->allmulti = 1;
2441 local->iff_allmultis++;
2442 }
2443 }
2444 if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) {
2445 if (sdata->promisc) {
2446 sdata->promisc = 0;
2447 local->iff_promiscs--;
2448 } else {
2449 sdata->promisc = 1;
2450 local->iff_promiscs++;
2451 }
2452 }
2453 if (dev->mc_count != sdata->mc_count) {
2454 local->mc_count = local->mc_count - sdata->mc_count +
2455 dev->mc_count;
2456 sdata->mc_count = dev->mc_count;
2457 }
2458 if (local->ops->set_multicast_list) {
2459 flags = local->mdev->flags;
2460 if (local->iff_allmultis)
2461 flags |= IFF_ALLMULTI;
2462 if (local->iff_promiscs)
2463 flags |= IFF_PROMISC;
2464 read_lock(&local->sub_if_lock);
2465 local->ops->set_multicast_list(local_to_hw(local), flags,
2466 local->mc_count);
2467 read_unlock(&local->sub_if_lock);
2468 }
2469 netif_tx_unlock(local->mdev);
2470 }
2471
2472 struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
2473 struct dev_mc_list *prev,
2474 void **ptr)
2475 {
2476 struct ieee80211_local *local = hw_to_local(hw);
2477 struct ieee80211_sub_if_data *sdata = *ptr;
2478 struct dev_mc_list *mc;
2479
2480 if (!prev) {
2481 WARN_ON(sdata);
2482 sdata = NULL;
2483 }
2484 if (!prev || !prev->next) {
2485 if (sdata)
2486 sdata = list_entry(sdata->list.next,
2487 struct ieee80211_sub_if_data, list);
2488 else
2489 sdata = list_entry(local->sub_if_list.next,
2490 struct ieee80211_sub_if_data, list);
2491 if (&sdata->list != &local->sub_if_list)
2492 mc = sdata->dev->mc_list;
2493 else
2494 mc = NULL;
2495 } else
2496 mc = prev->next;
2497
2498 *ptr = sdata;
2499 return mc;
2500 }
2501 EXPORT_SYMBOL(ieee80211_get_mc_list_item);
2502
2503 static struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
2504 {
2505 struct ieee80211_sub_if_data *sdata;
2506 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2507 return &(sdata->stats);
2508 }
2509
2510 static void ieee80211_if_shutdown(struct net_device *dev)
2511 {
2512 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2513 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2514
2515 ASSERT_RTNL();
2516 switch (sdata->type) {
2517 case IEEE80211_IF_TYPE_STA:
2518 case IEEE80211_IF_TYPE_IBSS:
2519 sdata->u.sta.state = IEEE80211_DISABLED;
2520 del_timer_sync(&sdata->u.sta.timer);
2521 skb_queue_purge(&sdata->u.sta.skb_queue);
2522 if (!local->ops->hw_scan &&
2523 local->scan_dev == sdata->dev) {
2524 local->sta_scanning = 0;
2525 cancel_delayed_work(&local->scan_work);
2526 }
2527 flush_workqueue(local->hw.workqueue);
2528 break;
2529 }
2530 }
2531
2532 static inline int identical_mac_addr_allowed(int type1, int type2)
2533 {
2534 return (type1 == IEEE80211_IF_TYPE_MNTR ||
2535 type2 == IEEE80211_IF_TYPE_MNTR ||
2536 (type1 == IEEE80211_IF_TYPE_AP &&
2537 type2 == IEEE80211_IF_TYPE_WDS) ||
2538 (type1 == IEEE80211_IF_TYPE_WDS &&
2539 (type2 == IEEE80211_IF_TYPE_WDS ||
2540 type2 == IEEE80211_IF_TYPE_AP)) ||
2541 (type1 == IEEE80211_IF_TYPE_AP &&
2542 type2 == IEEE80211_IF_TYPE_VLAN) ||
2543 (type1 == IEEE80211_IF_TYPE_VLAN &&
2544 (type2 == IEEE80211_IF_TYPE_AP ||
2545 type2 == IEEE80211_IF_TYPE_VLAN)));
2546 }
2547
2548 static int ieee80211_master_open(struct net_device *dev)
2549 {
2550 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2551 struct ieee80211_sub_if_data *sdata;
2552 int res = -EOPNOTSUPP;
2553
2554 read_lock(&local->sub_if_lock);
2555 list_for_each_entry(sdata, &local->sub_if_list, list) {
2556 if (sdata->dev != dev && netif_running(sdata->dev)) {
2557 res = 0;
2558 break;
2559 }
2560 }
2561 read_unlock(&local->sub_if_lock);
2562 return res;
2563 }
2564
2565 static int ieee80211_master_stop(struct net_device *dev)
2566 {
2567 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2568 struct ieee80211_sub_if_data *sdata;
2569
2570 read_lock(&local->sub_if_lock);
2571 list_for_each_entry(sdata, &local->sub_if_list, list)
2572 if (sdata->dev != dev && netif_running(sdata->dev))
2573 dev_close(sdata->dev);
2574 read_unlock(&local->sub_if_lock);
2575
2576 return 0;
2577 }
2578
2579 static int ieee80211_mgmt_open(struct net_device *dev)
2580 {
2581 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2582
2583 if (!netif_running(local->mdev))
2584 return -EOPNOTSUPP;
2585 return 0;
2586 }
2587
2588 static int ieee80211_mgmt_stop(struct net_device *dev)
2589 {
2590 return 0;
2591 }
2592
2593 /* Check if running monitor interfaces should go to a "soft monitor" mode
2594 * and switch them if necessary. */
2595 static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
2596 {
2597 struct ieee80211_if_init_conf conf;
2598
2599 if (local->open_count && local->open_count == local->monitors &&
2600 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
2601 local->ops->remove_interface) {
2602 conf.if_id = -1;
2603 conf.type = IEEE80211_IF_TYPE_MNTR;
2604 conf.mac_addr = NULL;
2605 local->ops->remove_interface(local_to_hw(local), &conf);
2606 }
2607 }
2608
2609 /* Check if running monitor interfaces should go to a "hard monitor" mode
2610 * and switch them if necessary. */
2611 static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
2612 {
2613 struct ieee80211_if_init_conf conf;
2614
2615 if (local->open_count && local->open_count == local->monitors &&
2616 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
2617 conf.if_id = -1;
2618 conf.type = IEEE80211_IF_TYPE_MNTR;
2619 conf.mac_addr = NULL;
2620 local->ops->add_interface(local_to_hw(local), &conf);
2621 }
2622 }
2623
2624 static int ieee80211_open(struct net_device *dev)
2625 {
2626 struct ieee80211_sub_if_data *sdata, *nsdata;
2627 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2628 struct ieee80211_if_init_conf conf;
2629 int res;
2630
2631 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2632 read_lock(&local->sub_if_lock);
2633 list_for_each_entry(nsdata, &local->sub_if_list, list) {
2634 struct net_device *ndev = nsdata->dev;
2635
2636 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
2637 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
2638 !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
2639 read_unlock(&local->sub_if_lock);
2640 return -ENOTUNIQ;
2641 }
2642 }
2643 read_unlock(&local->sub_if_lock);
2644
2645 if (sdata->type == IEEE80211_IF_TYPE_WDS &&
2646 is_zero_ether_addr(sdata->u.wds.remote_addr))
2647 return -ENOLINK;
2648
2649 if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
2650 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
2651 /* run the interface in a "soft monitor" mode */
2652 local->monitors++;
2653 local->open_count++;
2654 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
2655 return 0;
2656 }
2657 ieee80211_start_soft_monitor(local);
2658
2659 conf.if_id = dev->ifindex;
2660 conf.type = sdata->type;
2661 conf.mac_addr = dev->dev_addr;
2662 res = local->ops->add_interface(local_to_hw(local), &conf);
2663 if (res) {
2664 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
2665 ieee80211_start_hard_monitor(local);
2666 return res;
2667 }
2668
2669 if (local->open_count == 0) {
2670 res = 0;
2671 tasklet_enable(&local->tx_pending_tasklet);
2672 tasklet_enable(&local->tasklet);
2673 if (local->ops->open)
2674 res = local->ops->open(local_to_hw(local));
2675 if (res == 0) {
2676 res = dev_open(local->mdev);
2677 if (res) {
2678 if (local->ops->stop)
2679 local->ops->stop(local_to_hw(local));
2680 } else {
2681 res = ieee80211_hw_config(local);
2682 if (res && local->ops->stop)
2683 local->ops->stop(local_to_hw(local));
2684 else if (!res && local->apdev)
2685 dev_open(local->apdev);
2686 }
2687 }
2688 if (res) {
2689 if (local->ops->remove_interface)
2690 local->ops->remove_interface(local_to_hw(local),
2691 &conf);
2692 return res;
2693 }
2694 }
2695 local->open_count++;
2696
2697 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
2698 local->monitors++;
2699 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
2700 } else
2701 ieee80211_if_config(dev);
2702
2703 if (sdata->type == IEEE80211_IF_TYPE_STA &&
2704 !local->user_space_mlme)
2705 netif_carrier_off(dev);
2706 else
2707 netif_carrier_on(dev);
2708
2709 netif_start_queue(dev);
2710 return 0;
2711 }
2712
2713
2714 static int ieee80211_stop(struct net_device *dev)
2715 {
2716 struct ieee80211_sub_if_data *sdata;
2717 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2718
2719 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2720
2721 if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
2722 local->open_count > 1 &&
2723 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
2724 /* remove "soft monitor" interface */
2725 local->open_count--;
2726 local->monitors--;
2727 if (!local->monitors)
2728 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
2729 return 0;
2730 }
2731
2732 netif_stop_queue(dev);
2733 ieee80211_if_shutdown(dev);
2734
2735 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
2736 local->monitors--;
2737 if (!local->monitors)
2738 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
2739 }
2740
2741 local->open_count--;
2742 if (local->open_count == 0) {
2743 if (netif_running(local->mdev))
2744 dev_close(local->mdev);
2745 if (local->apdev)
2746 dev_close(local->apdev);
2747 if (local->ops->stop)
2748 local->ops->stop(local_to_hw(local));
2749 tasklet_disable(&local->tx_pending_tasklet);
2750 tasklet_disable(&local->tasklet);
2751 }
2752 if (local->ops->remove_interface) {
2753 struct ieee80211_if_init_conf conf;
2754
2755 conf.if_id = dev->ifindex;
2756 conf.type = sdata->type;
2757 conf.mac_addr = dev->dev_addr;
2758 local->ops->remove_interface(local_to_hw(local), &conf);
2759 }
2760
2761 ieee80211_start_hard_monitor(local);
2762
2763 return 0;
2764 }
2765
2766
2767 static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
2768 {
2769 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
2770 return ETH_ALEN;
2771 }
2772
2773 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
2774 {
2775 return compare_ether_addr(raddr, addr) == 0 ||
2776 is_broadcast_ether_addr(raddr);
2777 }
2778
2779
2780 static ieee80211_txrx_result
2781 ieee80211_rx_h_data(struct ieee80211_txrx_data *rx)
2782 {
2783 struct net_device *dev = rx->dev;
2784 struct ieee80211_local *local = rx->local;
2785 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
2786 u16 fc, hdrlen, ethertype;
2787 u8 *payload;
2788 u8 dst[ETH_ALEN];
2789 u8 src[ETH_ALEN];
2790 struct sk_buff *skb = rx->skb, *skb2;
2791 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2792
2793 fc = rx->fc;
2794 if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA))
2795 return TXRX_CONTINUE;
2796
2797 if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
2798 return TXRX_DROP;
2799
2800 hdrlen = ieee80211_get_hdrlen(fc);
2801
2802 /* convert IEEE 802.11 header + possible LLC headers into Ethernet
2803 * header
2804 * IEEE 802.11 address fields:
2805 * ToDS FromDS Addr1 Addr2 Addr3 Addr4
2806 * 0 0 DA SA BSSID n/a
2807 * 0 1 DA BSSID SA n/a
2808 * 1 0 BSSID SA DA n/a
2809 * 1 1 RA TA DA SA
2810 */
2811
2812 switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
2813 case IEEE80211_FCTL_TODS:
2814 /* BSSID SA DA */
2815 memcpy(dst, hdr->addr3, ETH_ALEN);
2816 memcpy(src, hdr->addr2, ETH_ALEN);
2817
2818 if (unlikely(sdata->type != IEEE80211_IF_TYPE_AP &&
2819 sdata->type != IEEE80211_IF_TYPE_VLAN)) {
2820 printk(KERN_DEBUG "%s: dropped ToDS frame (BSSID="
2821 MAC_FMT " SA=" MAC_FMT " DA=" MAC_FMT ")\n",
2822 dev->name, MAC_ARG(hdr->addr1),
2823 MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3));
2824 return TXRX_DROP;
2825 }
2826 break;
2827 case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
2828 /* RA TA DA SA */
2829 memcpy(dst, hdr->addr3, ETH_ALEN);
2830 memcpy(src, hdr->addr4, ETH_ALEN);
2831
2832 if (unlikely(sdata->type != IEEE80211_IF_TYPE_WDS)) {
2833 printk(KERN_DEBUG "%s: dropped FromDS&ToDS frame (RA="
2834 MAC_FMT " TA=" MAC_FMT " DA=" MAC_FMT " SA="
2835 MAC_FMT ")\n",
2836 rx->dev->name, MAC_ARG(hdr->addr1),
2837 MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3),
2838 MAC_ARG(hdr->addr4));
2839 return TXRX_DROP;
2840 }
2841 break;
2842 case IEEE80211_FCTL_FROMDS:
2843 /* DA BSSID SA */
2844 memcpy(dst, hdr->addr1, ETH_ALEN);
2845 memcpy(src, hdr->addr3, ETH_ALEN);
2846
2847 if (sdata->type != IEEE80211_IF_TYPE_STA ||
2848 (is_multicast_ether_addr(dst) &&
2849 !compare_ether_addr(src, dev->dev_addr)))
2850 return TXRX_DROP;
2851 break;
2852 case 0:
2853 /* DA SA BSSID */
2854 memcpy(dst, hdr->addr1, ETH_ALEN);
2855 memcpy(src, hdr->addr2, ETH_ALEN);
2856
2857 if (sdata->type != IEEE80211_IF_TYPE_IBSS) {
2858 if (net_ratelimit()) {
2859 printk(KERN_DEBUG "%s: dropped IBSS frame (DA="
2860 MAC_FMT " SA=" MAC_FMT " BSSID=" MAC_FMT
2861 ")\n",
2862 dev->name, MAC_ARG(hdr->addr1),
2863 MAC_ARG(hdr->addr2),
2864 MAC_ARG(hdr->addr3));
2865 }
2866 return TXRX_DROP;
2867 }
2868 break;
2869 }
2870
2871 payload = skb->data + hdrlen;
2872
2873 if (unlikely(skb->len - hdrlen < 8)) {
2874 if (net_ratelimit()) {
2875 printk(KERN_DEBUG "%s: RX too short data frame "
2876 "payload\n", dev->name);
2877 }
2878 return TXRX_DROP;
2879 }
2880
2881 ethertype = (payload[6] << 8) | payload[7];
2882
2883 if (likely((compare_ether_addr(payload, rfc1042_header) == 0 &&
2884 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
2885 compare_ether_addr(payload, bridge_tunnel_header) == 0)) {
2886 /* remove RFC1042 or Bridge-Tunnel encapsulation and
2887 * replace EtherType */
2888 skb_pull(skb, hdrlen + 6);
2889 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
2890 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
2891 } else {
2892 struct ethhdr *ehdr;
2893 __be16 len;
2894 skb_pull(skb, hdrlen);
2895 len = htons(skb->len);
2896 ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr));
2897 memcpy(ehdr->h_dest, dst, ETH_ALEN);
2898 memcpy(ehdr->h_source, src, ETH_ALEN);
2899 ehdr->h_proto = len;
2900 }
2901 skb->dev = dev;
2902
2903 skb2 = NULL;
2904
2905 sdata->stats.rx_packets++;
2906 sdata->stats.rx_bytes += skb->len;
2907
2908 if (local->bridge_packets && (sdata->type == IEEE80211_IF_TYPE_AP
2909 || sdata->type == IEEE80211_IF_TYPE_VLAN) && rx->u.rx.ra_match) {
2910 if (is_multicast_ether_addr(skb->data)) {
2911 /* send multicast frames both to higher layers in
2912 * local net stack and back to the wireless media */
2913 skb2 = skb_copy(skb, GFP_ATOMIC);
2914 if (!skb2)
2915 printk(KERN_DEBUG "%s: failed to clone "
2916 "multicast frame\n", dev->name);
2917 } else {
2918 struct sta_info *dsta;
2919 dsta = sta_info_get(local, skb->data);
2920 if (dsta && !dsta->dev) {
2921 printk(KERN_DEBUG "Station with null dev "
2922 "structure!\n");
2923 } else if (dsta && dsta->dev == dev) {
2924 /* Destination station is associated to this
2925 * AP, so send the frame directly to it and
2926 * do not pass the frame to local net stack.
2927 */
2928 skb2 = skb;
2929 skb = NULL;
2930 }
2931 if (dsta)
2932 sta_info_put(dsta);
2933 }
2934 }
2935
2936 if (skb) {
2937 /* deliver to local stack */
2938 skb->protocol = eth_type_trans(skb, dev);
2939 memset(skb->cb, 0, sizeof(skb->cb));
2940 netif_rx(skb);
2941 }
2942
2943 if (skb2) {
2944 /* send to wireless media */
2945 skb2->protocol = __constant_htons(ETH_P_802_3);
2946 skb_set_network_header(skb2, 0);
2947 skb_set_mac_header(skb2, 0);
2948 dev_queue_xmit(skb2);
2949 }
2950
2951 return TXRX_QUEUED;
2952 }
2953
2954
2955 static struct ieee80211_rate *
2956 ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate)
2957 {
2958 struct ieee80211_hw_mode *mode;
2959 int r;
2960
2961 list_for_each_entry(mode, &local->modes_list, list) {
2962 if (mode->mode != phymode)
2963 continue;
2964 for (r = 0; r < mode->num_rates; r++) {
2965 struct ieee80211_rate *rate = &mode->rates[r];
2966 if (rate->val == hw_rate ||
2967 (rate->flags & IEEE80211_RATE_PREAMBLE2 &&
2968 rate->val2 == hw_rate))
2969 return rate;
2970 }
2971 }
2972
2973 return NULL;
2974 }
2975
2976 static void
2977 ieee80211_fill_frame_info(struct ieee80211_local *local,
2978 struct ieee80211_frame_info *fi,
2979 struct ieee80211_rx_status *status)
2980 {
2981 if (status) {
2982 struct timespec ts;
2983 struct ieee80211_rate *rate;
2984
2985 jiffies_to_timespec(jiffies, &ts);
2986 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
2987 ts.tv_nsec / 1000);
2988 fi->mactime = cpu_to_be64(status->mactime);
2989 switch (status->phymode) {
2990 case MODE_IEEE80211A:
2991 fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
2992 break;
2993 case MODE_IEEE80211B:
2994 fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
2995 break;
2996 case MODE_IEEE80211G:
2997 fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
2998 break;
2999 case MODE_ATHEROS_TURBO:
3000 fi->phytype =
3001 htonl(ieee80211_phytype_dsss_dot11_turbo);
3002 break;
3003 default:
3004 fi->phytype = htonl(0xAAAAAAAA);
3005 break;
3006 }
3007 fi->channel = htonl(status->channel);
3008 rate = ieee80211_get_rate(local, status->phymode,
3009 status->rate);
3010 if (rate) {
3011 fi->datarate = htonl(rate->rate);
3012 if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
3013 if (status->rate == rate->val)
3014 fi->preamble = htonl(2); /* long */
3015 else if (status->rate == rate->val2)
3016 fi->preamble = htonl(1); /* short */
3017 } else
3018 fi->preamble = htonl(0);
3019 } else {
3020 fi->datarate = htonl(0);
3021 fi->preamble = htonl(0);
3022 }
3023
3024 fi->antenna = htonl(status->antenna);
3025 fi->priority = htonl(0xffffffff); /* no clue */
3026 fi->ssi_type = htonl(ieee80211_ssi_raw);
3027 fi->ssi_signal = htonl(status->ssi);
3028 fi->ssi_noise = 0x00000000;
3029 fi->encoding = 0;
3030 } else {
3031 /* clear everything because we really don't know.
3032 * the msg_type field isn't present on monitor frames
3033 * so we don't know whether it will be present or not,
3034 * but it's ok to not clear it since it'll be assigned
3035 * anyway */
3036 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
3037
3038 fi->ssi_type = htonl(ieee80211_ssi_none);
3039 }
3040 fi->version = htonl(IEEE80211_FI_VERSION);
3041 fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
3042 }
3043
3044 /* this routine is actually not just for this, but also
3045 * for pushing fake 'management' frames into userspace.
3046 * it shall be replaced by a netlink-based system. */
3047 void
3048 ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
3049 struct ieee80211_rx_status *status, u32 msg_type)
3050 {
3051 struct ieee80211_frame_info *fi;
3052 const size_t hlen = sizeof(struct ieee80211_frame_info);
3053 struct ieee80211_sub_if_data *sdata;
3054
3055 skb->dev = local->apdev;
3056
3057 sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
3058
3059 if (skb_headroom(skb) < hlen) {
3060 I802_DEBUG_INC(local->rx_expand_skb_head);
3061 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
3062 dev_kfree_skb(skb);
3063 return;
3064 }
3065 }
3066
3067 fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
3068
3069 ieee80211_fill_frame_info(local, fi, status);
3070 fi->msg_type = htonl(msg_type);
3071
3072 sdata->stats.rx_packets++;
3073 sdata->stats.rx_bytes += skb->len;
3074
3075 skb_set_mac_header(skb, 0);
3076 skb->ip_summed = CHECKSUM_UNNECESSARY;
3077 skb->pkt_type = PACKET_OTHERHOST;
3078 skb->protocol = htons(ETH_P_802_2);
3079 memset(skb->cb, 0, sizeof(skb->cb));
3080 netif_rx(skb);
3081 }
3082
3083 static void
3084 ieee80211_rx_monitor(struct net_device *dev, struct sk_buff *skb,
3085 struct ieee80211_rx_status *status)
3086 {
3087 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3088 struct ieee80211_sub_if_data *sdata;
3089 struct ieee80211_rate *rate;
3090 struct ieee80211_rtap_hdr {
3091 struct ieee80211_radiotap_header hdr;
3092 u8 flags;
3093 u8 rate;
3094 __le16 chan_freq;
3095 __le16 chan_flags;
3096 u8 antsignal;
3097 } __attribute__ ((packed)) *rthdr;
3098
3099 skb->dev = dev;
3100
3101 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3102
3103 if (status->flag & RX_FLAG_RADIOTAP)
3104 goto out;
3105
3106 if (skb_headroom(skb) < sizeof(*rthdr)) {
3107 I802_DEBUG_INC(local->rx_expand_skb_head);
3108 if (pskb_expand_head(skb, sizeof(*rthdr), 0, GFP_ATOMIC)) {
3109 dev_kfree_skb(skb);
3110 return;
3111 }
3112 }
3113
3114 rthdr = (struct ieee80211_rtap_hdr *) skb_push(skb, sizeof(*rthdr));
3115 memset(rthdr, 0, sizeof(*rthdr));
3116 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
3117 rthdr->hdr.it_present =
3118 cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
3119 (1 << IEEE80211_RADIOTAP_RATE) |
3120 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3121 (1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL));
3122 rthdr->flags = local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS ?
3123 IEEE80211_RADIOTAP_F_FCS : 0;
3124 rate = ieee80211_get_rate(local, status->phymode, status->rate);
3125 if (rate)
3126 rthdr->rate = rate->rate / 5;
3127 rthdr->chan_freq = cpu_to_le16(status->freq);
3128 rthdr->chan_flags =
3129 status->phymode == MODE_IEEE80211A ?
3130 cpu_to_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ) :
3131 cpu_to_le16(IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ);
3132 rthdr->antsignal = status->ssi;
3133
3134 out:
3135 sdata->stats.rx_packets++;
3136 sdata->stats.rx_bytes += skb->len;
3137
3138 skb_set_mac_header(skb, 0);
3139 skb->ip_summed = CHECKSUM_UNNECESSARY;
3140 skb->pkt_type = PACKET_OTHERHOST;
3141 skb->protocol = htons(ETH_P_802_2);
3142 memset(skb->cb, 0, sizeof(skb->cb));
3143 netif_rx(skb);
3144 }
3145
3146 int ieee80211_radar_status(struct ieee80211_hw *hw, int channel,
3147 int radar, int radar_type)
3148 {
3149 struct sk_buff *skb;
3150 struct ieee80211_radar_info *msg;
3151 struct ieee80211_local *local = hw_to_local(hw);
3152
3153 if (!local->apdev)
3154 return 0;
3155
3156 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
3157 sizeof(struct ieee80211_radar_info));
3158
3159 if (!skb)
3160 return -ENOMEM;
3161 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
3162
3163 msg = (struct ieee80211_radar_info *)
3164 skb_put(skb, sizeof(struct ieee80211_radar_info));
3165 msg->channel = channel;
3166 msg->radar = radar;
3167 msg->radar_type = radar_type;
3168
3169 ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar);
3170 return 0;
3171 }
3172 EXPORT_SYMBOL(ieee80211_radar_status);
3173
3174
3175 static void ap_sta_ps_start(struct net_device *dev, struct sta_info *sta)
3176 {
3177 struct ieee80211_sub_if_data *sdata;
3178 sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev);
3179
3180 if (sdata->bss)
3181 atomic_inc(&sdata->bss->num_sta_ps);
3182 sta->flags |= WLAN_STA_PS;
3183 sta->pspoll = 0;
3184 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
3185 printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d enters power "
3186 "save mode\n", dev->name, MAC_ARG(sta->addr), sta->aid);
3187 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
3188 }
3189
3190
3191 static int ap_sta_ps_end(struct net_device *dev, struct sta_info *sta)
3192 {
3193 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3194 struct sk_buff *skb;
3195 int sent = 0;
3196 struct ieee80211_sub_if_data *sdata;
3197 struct ieee80211_tx_packet_data *pkt_data;
3198
3199 sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev);
3200 if (sdata->bss)
3201 atomic_dec(&sdata->bss->num_sta_ps);
3202 sta->flags &= ~(WLAN_STA_PS | WLAN_STA_TIM);
3203 sta->pspoll = 0;
3204 if (!skb_queue_empty(&sta->ps_tx_buf)) {
3205 if (local->ops->set_tim)
3206 local->ops->set_tim(local_to_hw(local), sta->aid, 0);
3207 if (sdata->bss)
3208 bss_tim_clear(local, sdata->bss, sta->aid);
3209 }
3210 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
3211 printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d exits power "
3212 "save mode\n", dev->name, MAC_ARG(sta->addr), sta->aid);
3213 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
3214 /* Send all buffered frames to the station */
3215 while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) {
3216 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
3217 sent++;
3218 pkt_data->requeue = 1;
3219 dev_queue_xmit(skb);
3220 }
3221 while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) {
3222 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
3223 local->total_ps_buffered--;
3224 sent++;
3225 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
3226 printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d send PS frame "
3227 "since STA not sleeping anymore\n", dev->name,
3228 MAC_ARG(sta->addr), sta->aid);
3229 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
3230 pkt_data->requeue = 1;
3231 dev_queue_xmit(skb);
3232 }
3233
3234 return sent;
3235 }
3236
3237
3238 static ieee80211_txrx_result
3239 ieee80211_rx_h_ps_poll(struct ieee80211_txrx_data *rx)
3240 {
3241 struct sk_buff *skb;
3242 int no_pending_pkts;
3243
3244 if (likely(!rx->sta ||
3245 (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL ||
3246 (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PSPOLL ||
3247 !rx->u.rx.ra_match))
3248 return TXRX_CONTINUE;
3249
3250 skb = skb_dequeue(&rx->sta->tx_filtered);
3251 if (!skb) {
3252 skb = skb_dequeue(&rx->sta->ps_tx_buf);
3253 if (skb)
3254 rx->local->total_ps_buffered--;
3255 }
3256 no_pending_pkts = skb_queue_empty(&rx->sta->tx_filtered) &&
3257 skb_queue_empty(&rx->sta->ps_tx_buf);
3258
3259 if (skb) {
3260 struct ieee80211_hdr *hdr =
3261 (struct ieee80211_hdr *) skb->data;
3262
3263 /* tell TX path to send one frame even though the STA may
3264 * still remain is PS mode after this frame exchange */
3265 rx->sta->pspoll = 1;
3266
3267 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
3268 printk(KERN_DEBUG "STA " MAC_FMT " aid %d: PS Poll (entries "
3269 "after %d)\n",
3270 MAC_ARG(rx->sta->addr), rx->sta->aid,
3271 skb_queue_len(&rx->sta->ps_tx_buf));
3272 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
3273
3274 /* Use MoreData flag to indicate whether there are more
3275 * buffered frames for this STA */
3276 if (no_pending_pkts) {
3277 hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
3278 rx->sta->flags &= ~WLAN_STA_TIM;
3279 } else
3280 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
3281
3282 dev_queue_xmit(skb);
3283
3284 if (no_pending_pkts) {
3285 if (rx->local->ops->set_tim)
3286 rx->local->ops->set_tim(local_to_hw(rx->local),
3287 rx->sta->aid, 0);
3288 if (rx->sdata->bss)
3289 bss_tim_clear(rx->local, rx->sdata->bss, rx->sta->aid);
3290 }
3291 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
3292 } else if (!rx->u.rx.sent_ps_buffered) {
3293 printk(KERN_DEBUG "%s: STA " MAC_FMT " sent PS Poll even "
3294 "though there is no buffered frames for it\n",
3295 rx->dev->name, MAC_ARG(rx->sta->addr));
3296 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
3297
3298 }
3299
3300 /* Free PS Poll skb here instead of returning TXRX_DROP that would
3301 * count as an dropped frame. */
3302 dev_kfree_skb(rx->skb);
3303
3304 return TXRX_QUEUED;
3305 }
3306
3307
3308 static inline struct ieee80211_fragment_entry *
3309 ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata,
3310 unsigned int frag, unsigned int seq, int rx_queue,
3311 struct sk_buff **skb)
3312 {
3313 struct ieee80211_fragment_entry *entry;
3314 int idx;
3315
3316 idx = sdata->fragment_next;
3317 entry = &sdata->fragments[sdata->fragment_next++];
3318 if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX)
3319 sdata->fragment_next = 0;
3320
3321 if (!skb_queue_empty(&entry->skb_list)) {
3322 #ifdef CONFIG_MAC80211_DEBUG
3323 struct ieee80211_hdr *hdr =
3324 (struct ieee80211_hdr *) entry->skb_list.next->data;
3325 printk(KERN_DEBUG "%s: RX reassembly removed oldest "
3326 "fragment entry (idx=%d age=%lu seq=%d last_frag=%d "
3327 "addr1=" MAC_FMT " addr2=" MAC_FMT "\n",
3328 sdata->dev->name, idx,
3329 jiffies - entry->first_frag_time, entry->seq,
3330 entry->last_frag, MAC_ARG(hdr->addr1),
3331 MAC_ARG(hdr->addr2));
3332 #endif /* CONFIG_MAC80211_DEBUG */
3333 __skb_queue_purge(&entry->skb_list);
3334 }
3335
3336 __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */
3337 *skb = NULL;
3338 entry->first_frag_time = jiffies;
3339 entry->seq = seq;
3340 entry->rx_queue = rx_queue;
3341 entry->last_frag = frag;
3342 entry->ccmp = 0;
3343 entry->extra_len = 0;
3344
3345 return entry;
3346 }
3347
3348
3349 static inline struct ieee80211_fragment_entry *
3350 ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata,
3351 u16 fc, unsigned int frag, unsigned int seq,
3352 int rx_queue, struct ieee80211_hdr *hdr)
3353 {
3354 struct ieee80211_fragment_entry *entry;
3355 int i, idx;
3356
3357 idx = sdata->fragment_next;
3358 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
3359 struct ieee80211_hdr *f_hdr;
3360 u16 f_fc;
3361
3362 idx--;
3363 if (idx < 0)
3364 idx = IEEE80211_FRAGMENT_MAX - 1;
3365
3366 entry = &sdata->fragments[idx];
3367 if (skb_queue_empty(&entry->skb_list) || entry->seq != seq ||
3368 entry->rx_queue != rx_queue ||
3369 entry->last_frag + 1 != frag)
3370 continue;
3371
3372 f_hdr = (struct ieee80211_hdr *) entry->skb_list.next->data;
3373 f_fc = le16_to_cpu(f_hdr->frame_control);
3374
3375 if ((fc & IEEE80211_FCTL_FTYPE) != (f_fc & IEEE80211_FCTL_FTYPE) ||
3376 compare_ether_addr(hdr->addr1, f_hdr->addr1) != 0 ||
3377 compare_ether_addr(hdr->addr2, f_hdr->addr2) != 0)
3378 continue;
3379
3380 if (entry->first_frag_time + 2 * HZ < jiffies) {
3381 __skb_queue_purge(&entry->skb_list);
3382 continue;
3383 }
3384 return entry;
3385 }
3386
3387 return NULL;
3388 }
3389
3390
3391 static ieee80211_txrx_result
3392 ieee80211_rx_h_defragment(struct ieee80211_txrx_data *rx)
3393 {
3394 struct ieee80211_hdr *hdr;
3395 u16 sc;
3396 unsigned int frag, seq;
3397 struct ieee80211_fragment_entry *entry;
3398 struct sk_buff *skb;
3399
3400 hdr = (struct ieee80211_hdr *) rx->skb->data;
3401 sc = le16_to_cpu(hdr->seq_ctrl);
3402 frag = sc & IEEE80211_SCTL_FRAG;
3403
3404 if (likely((!(rx->fc & IEEE80211_FCTL_MOREFRAGS) && frag == 0) ||
3405 (rx->skb)->len < 24 ||
3406 is_multicast_ether_addr(hdr->addr1))) {
3407 /* not fragmented */
3408 goto out;
3409 }
3410 I802_DEBUG_INC(rx->local->rx_handlers_fragments);
3411
3412 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3413
3414 if (frag == 0) {
3415 /* This is the first fragment of a new frame. */
3416 entry = ieee80211_reassemble_add(rx->sdata, frag, seq,
3417 rx->u.rx.queue, &(rx->skb));
3418 if (rx->key && rx->key->alg == ALG_CCMP &&
3419 (rx->fc & IEEE80211_FCTL_PROTECTED)) {
3420 /* Store CCMP PN so that we can verify that the next
3421 * fragment has a sequential PN value. */
3422 entry->ccmp = 1;
3423 memcpy(entry->last_pn,
3424 rx->key->u.ccmp.rx_pn[rx->u.rx.queue],
3425 CCMP_PN_LEN);
3426 }
3427 return TXRX_QUEUED;
3428 }
3429
3430 /* This is a fragment for a frame that should already be pending in
3431 * fragment cache. Add this fragment to the end of the pending entry.
3432 */
3433 entry = ieee80211_reassemble_find(rx->sdata, rx->fc, frag, seq,
3434 rx->u.rx.queue, hdr);
3435 if (!entry) {
3436 I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
3437 return TXRX_DROP;
3438 }
3439
3440 /* Verify that MPDUs within one MSDU have sequential PN values.
3441 * (IEEE 802.11i, 8.3.3.4.5) */
3442 if (entry->ccmp) {
3443 int i;
3444 u8 pn[CCMP_PN_LEN], *rpn;
3445 if (!rx->key || rx->key->alg != ALG_CCMP)
3446 return TXRX_DROP;
3447 memcpy(pn, entry->last_pn, CCMP_PN_LEN);
3448 for (i = CCMP_PN_LEN - 1; i >= 0; i--) {
3449 pn[i]++;
3450 if (pn[i])
3451 break;
3452 }
3453 rpn = rx->key->u.ccmp.rx_pn[rx->u.rx.queue];
3454 if (memcmp(pn, rpn, CCMP_PN_LEN) != 0) {
3455 printk(KERN_DEBUG "%s: defrag: CCMP PN not sequential"
3456 " A2=" MAC_FMT " PN=%02x%02x%02x%02x%02x%02x "
3457 "(expected %02x%02x%02x%02x%02x%02x)\n",
3458 rx->dev->name, MAC_ARG(hdr->addr2),
3459 rpn[0], rpn[1], rpn[2], rpn[3], rpn[4], rpn[5],
3460 pn[0], pn[1], pn[2], pn[3], pn[4], pn[5]);
3461 return TXRX_DROP;
3462 }
3463 memcpy(entry->last_pn, pn, CCMP_PN_LEN);
3464 }
3465
3466 skb_pull(rx->skb, ieee80211_get_hdrlen(rx->fc));
3467 __skb_queue_tail(&entry->skb_list, rx->skb);
3468 entry->last_frag = frag;
3469 entry->extra_len += rx->skb->len;
3470 if (rx->fc & IEEE80211_FCTL_MOREFRAGS) {
3471 rx->skb = NULL;
3472 return TXRX_QUEUED;
3473 }
3474
3475 rx->skb = __skb_dequeue(&entry->skb_list);
3476 if (skb_tailroom(rx->skb) < entry->extra_len) {
3477 I802_DEBUG_INC(rx->local->rx_expand_skb_head2);
3478 if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len,
3479 GFP_ATOMIC))) {
3480 I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
3481 __skb_queue_purge(&entry->skb_list);
3482 return TXRX_DROP;
3483 }
3484 }
3485 while ((skb = __skb_dequeue(&entry->skb_list))) {
3486 memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len);
3487 dev_kfree_skb(skb);
3488 }
3489
3490 /* Complete frame has been reassembled - process it now */
3491 rx->fragmented = 1;
3492
3493 out:
3494 if (rx->sta)
3495 rx->sta->rx_packets++;
3496 if (is_multicast_ether_addr(hdr->addr1))
3497 rx->local->dot11MulticastReceivedFrameCount++;
3498 else
3499 ieee80211_led_rx(rx->local);
3500 return TXRX_CONTINUE;
3501 }
3502
3503
3504 static ieee80211_txrx_result
3505 ieee80211_rx_h_monitor(struct ieee80211_txrx_data *rx)
3506 {
3507 if (rx->sdata->type == IEEE80211_IF_TYPE_MNTR) {
3508 ieee80211_rx_monitor(rx->dev, rx->skb, rx->u.rx.status);
3509 return TXRX_QUEUED;
3510 }
3511
3512 if (rx->u.rx.status->flag & RX_FLAG_RADIOTAP)
3513 skb_pull(rx->skb, ieee80211_get_radiotap_len(rx->skb));
3514
3515 return TXRX_CONTINUE;
3516 }
3517
3518
3519 static ieee80211_txrx_result
3520 ieee80211_rx_h_check(struct ieee80211_txrx_data *rx)
3521 {
3522 struct ieee80211_hdr *hdr;
3523 int always_sta_key;
3524 hdr = (struct ieee80211_hdr *) rx->skb->data;
3525
3526 /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */
3527 if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) {
3528 if (unlikely(rx->fc & IEEE80211_FCTL_RETRY &&
3529 rx->sta->last_seq_ctrl[rx->u.rx.queue] ==
3530 hdr->seq_ctrl)) {
3531 if (rx->u.rx.ra_match) {
3532 rx->local->dot11FrameDuplicateCount++;
3533 rx->sta->num_duplicates++;
3534 }
3535 return TXRX_DROP;
3536 } else
3537 rx->sta->last_seq_ctrl[rx->u.rx.queue] = hdr->seq_ctrl;
3538 }
3539
3540 if ((rx->local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) &&
3541 rx->skb->len > FCS_LEN)
3542 skb_trim(rx->skb, rx->skb->len - FCS_LEN);
3543
3544 if (unlikely(rx->skb->len < 16)) {
3545 I802_DEBUG_INC(rx->local->rx_handlers_drop_short);
3546 return TXRX_DROP;
3547 }
3548
3549 if (!rx->u.rx.ra_match)
3550 rx->skb->pkt_type = PACKET_OTHERHOST;
3551 else if (compare_ether_addr(rx->dev->dev_addr, hdr->addr1) == 0)
3552 rx->skb->pkt_type = PACKET_HOST;
3553 else if (is_multicast_ether_addr(hdr->addr1)) {
3554 if (is_broadcast_ether_addr(hdr->addr1))
3555 rx->skb->pkt_type = PACKET_BROADCAST;
3556 else
3557 rx->skb->pkt_type = PACKET_MULTICAST;
3558 } else
3559 rx->skb->pkt_type = PACKET_OTHERHOST;
3560
3561 /* Drop disallowed frame classes based on STA auth/assoc state;
3562 * IEEE 802.11, Chap 5.5.
3563 *
3564 * 80211.o does filtering only based on association state, i.e., it
3565 * drops Class 3 frames from not associated stations. hostapd sends
3566 * deauth/disassoc frames when needed. In addition, hostapd is
3567 * responsible for filtering on both auth and assoc states.
3568 */
3569 if (unlikely(((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA ||
3570 ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL &&
3571 (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)) &&
3572 rx->sdata->type != IEEE80211_IF_TYPE_IBSS &&
3573 (!rx->sta || !(rx->sta->flags & WLAN_STA_ASSOC)))) {
3574 if ((!(rx->fc & IEEE80211_FCTL_FROMDS) &&
3575 !(rx->fc & IEEE80211_FCTL_TODS) &&
3576 (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)
3577 || !rx->u.rx.ra_match) {
3578 /* Drop IBSS frames and frames for other hosts
3579 * silently. */
3580 return TXRX_DROP;
3581 }
3582
3583 if (!rx->local->apdev)
3584 return TXRX_DROP;
3585
3586 ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
3587 ieee80211_msg_sta_not_assoc);
3588 return TXRX_QUEUED;
3589 }
3590
3591 if (rx->sdata->type == IEEE80211_IF_TYPE_STA)
3592 always_sta_key = 0;
3593 else
3594 always_sta_key = 1;
3595
3596 if (rx->sta && rx->sta->key && always_sta_key) {
3597 rx->key = rx->sta->key;
3598 } else {
3599 if (rx->sta && rx->sta->key)
3600 rx->key = rx->sta->key;
3601 else
3602 rx->key = rx->sdata->default_key;
3603
3604 if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) &&
3605 rx->fc & IEEE80211_FCTL_PROTECTED) {
3606 int keyidx = ieee80211_wep_get_keyidx(rx->skb);
3607
3608 if (keyidx >= 0 && keyidx < NUM_DEFAULT_KEYS &&
3609 (!rx->sta || !rx->sta->key || keyidx > 0))
3610 rx->key = rx->sdata->keys[keyidx];
3611
3612 if (!rx->key) {
3613 if (!rx->u.rx.ra_match)
3614 return TXRX_DROP;
3615 printk(KERN_DEBUG "%s: RX WEP frame with "
3616 "unknown keyidx %d (A1=" MAC_FMT " A2="
3617 MAC_FMT " A3=" MAC_FMT ")\n",
3618 rx->dev->name, keyidx,
3619 MAC_ARG(hdr->addr1),
3620 MAC_ARG(hdr->addr2),
3621 MAC_ARG(hdr->addr3));
3622 if (!rx->local->apdev)
3623 return TXRX_DROP;
3624 ieee80211_rx_mgmt(
3625 rx->local, rx->skb, rx->u.rx.status,
3626 ieee80211_msg_wep_frame_unknown_key);
3627 return TXRX_QUEUED;
3628 }
3629 }
3630 }
3631
3632 if (rx->fc & IEEE80211_FCTL_PROTECTED && rx->key && rx->u.rx.ra_match) {
3633 rx->key->tx_rx_count++;
3634 if (unlikely(rx->local->key_tx_rx_threshold &&
3635 rx->key->tx_rx_count >
3636 rx->local->key_tx_rx_threshold)) {
3637 ieee80211_key_threshold_notify(rx->dev, rx->key,
3638 rx->sta);
3639 }
3640 }
3641
3642 return TXRX_CONTINUE;
3643 }
3644
3645
3646 static ieee80211_txrx_result
3647 ieee80211_rx_h_sta_process(struct ieee80211_txrx_data *rx)
3648 {
3649 struct sta_info *sta = rx->sta;
3650 struct net_device *dev = rx->dev;
3651 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
3652
3653 if (!sta)
3654 return TXRX_CONTINUE;
3655
3656 /* Update last_rx only for IBSS packets which are for the current
3657 * BSSID to avoid keeping the current IBSS network alive in cases where
3658 * other STAs are using different BSSID. */
3659 if (rx->sdata->type == IEEE80211_IF_TYPE_IBSS) {
3660 u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len);
3661 if (compare_ether_addr(bssid, rx->sdata->u.sta.bssid) == 0)
3662 sta->last_rx = jiffies;
3663 } else
3664 if (!is_multicast_ether_addr(hdr->addr1) ||
3665 rx->sdata->type == IEEE80211_IF_TYPE_STA) {
3666 /* Update last_rx only for unicast frames in order to prevent
3667 * the Probe Request frames (the only broadcast frames from a
3668 * STA in infrastructure mode) from keeping a connection alive.
3669 */
3670 sta->last_rx = jiffies;
3671 }
3672
3673 if (!rx->u.rx.ra_match)
3674 return TXRX_CONTINUE;
3675
3676 sta->rx_fragments++;
3677 sta->rx_bytes += rx->skb->len;
3678 sta->last_rssi = (sta->last_rssi * 15 +
3679 rx->u.rx.status->ssi) / 16;
3680 sta->last_signal = (sta->last_signal * 15 +
3681 rx->u.rx.status->signal) / 16;
3682 sta->last_noise = (sta->last_noise * 15 +
3683 rx->u.rx.status->noise) / 16;
3684
3685 if (!(rx->fc & IEEE80211_FCTL_MOREFRAGS)) {
3686 /* Change STA power saving mode only in the end of a frame
3687 * exchange sequence */
3688 if ((sta->flags & WLAN_STA_PS) && !(rx->fc & IEEE80211_FCTL_PM))
3689 rx->u.rx.sent_ps_buffered += ap_sta_ps_end(dev, sta);
3690 else if (!(sta->flags & WLAN_STA_PS) &&
3691 (rx->fc & IEEE80211_FCTL_PM))
3692 ap_sta_ps_start(dev, sta);
3693 }
3694
3695 /* Drop data::nullfunc frames silently, since they are used only to
3696 * control station power saving mode. */
3697 if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
3698 (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_NULLFUNC) {
3699 I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc);
3700 /* Update counter and free packet here to avoid counting this
3701 * as a dropped packed. */
3702 sta->rx_packets++;
3703 dev_kfree_skb(rx->skb);
3704 return TXRX_QUEUED;
3705 }
3706
3707 return TXRX_CONTINUE;
3708 } /* ieee80211_rx_h_sta_process */
3709
3710
3711 static ieee80211_txrx_result
3712 ieee80211_rx_h_wep_weak_iv_detection(struct ieee80211_txrx_data *rx)
3713 {
3714 if (!rx->sta || !(rx->fc & IEEE80211_FCTL_PROTECTED) ||
3715 (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA ||
3716 !rx->key || rx->key->alg != ALG_WEP || !rx->u.rx.ra_match)
3717 return TXRX_CONTINUE;
3718
3719 /* Check for weak IVs, if hwaccel did not remove IV from the frame */
3720 if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) ||
3721 rx->key->force_sw_encrypt) {
3722 u8 *iv = ieee80211_wep_is_weak_iv(rx->skb, rx->key);
3723 if (iv) {
3724 rx->sta->wep_weak_iv_count++;
3725 }
3726 }
3727
3728 return TXRX_CONTINUE;
3729 }
3730
3731
3732 static ieee80211_txrx_result
3733 ieee80211_rx_h_wep_decrypt(struct ieee80211_txrx_data *rx)
3734 {
3735 /* If the device handles decryption totally, skip this test */
3736 if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP)
3737 return TXRX_CONTINUE;
3738
3739 if ((rx->key && rx->key->alg != ALG_WEP) ||
3740 !(rx->fc & IEEE80211_FCTL_PROTECTED) ||
3741 ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
3742 ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
3743 (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)))
3744 return TXRX_CONTINUE;
3745
3746 if (!rx->key) {
3747 printk(KERN_DEBUG "%s: RX WEP frame, but no key set\n",
3748 rx->dev->name);
3749 return TXRX_DROP;
3750 }
3751
3752 if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED) ||
3753 rx->key->force_sw_encrypt) {
3754 if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) {
3755 printk(KERN_DEBUG "%s: RX WEP frame, decrypt "
3756 "failed\n", rx->dev->name);
3757 return TXRX_DROP;
3758 }
3759 } else if (rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) {
3760 ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key);
3761 /* remove ICV */
3762 skb_trim(rx->skb, rx->skb->len - 4);
3763 }
3764
3765 return TXRX_CONTINUE;
3766 }
3767
3768
3769 static ieee80211_txrx_result
3770 ieee80211_rx_h_802_1x_pae(struct ieee80211_txrx_data *rx)
3771 {
3772 if (rx->sdata->eapol && ieee80211_is_eapol(rx->skb) &&
3773 rx->sdata->type != IEEE80211_IF_TYPE_STA && rx->u.rx.ra_match) {
3774 /* Pass both encrypted and unencrypted EAPOL frames to user
3775 * space for processing. */
3776 if (!rx->local->apdev)
3777 return TXRX_DROP;
3778 ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
3779 ieee80211_msg_normal);
3780 return TXRX_QUEUED;
3781 }
3782
3783 if (unlikely(rx->sdata->ieee802_1x &&
3784 (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
3785 (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC &&
3786 (!rx->sta || !(rx->sta->flags & WLAN_STA_AUTHORIZED)) &&
3787 !ieee80211_is_eapol(rx->skb))) {
3788 #ifdef CONFIG_MAC80211_DEBUG
3789 struct ieee80211_hdr *hdr =
3790 (struct ieee80211_hdr *) rx->skb->data;
3791 printk(KERN_DEBUG "%s: dropped frame from " MAC_FMT
3792 " (unauthorized port)\n", rx->dev->name,
3793 MAC_ARG(hdr->addr2));
3794 #endif /* CONFIG_MAC80211_DEBUG */
3795 return TXRX_DROP;
3796 }
3797
3798 return TXRX_CONTINUE;
3799 }
3800
3801
3802 static ieee80211_txrx_result
3803 ieee80211_rx_h_drop_unencrypted(struct ieee80211_txrx_data *rx)
3804 {
3805 /* If the device handles decryption totally, skip this test */
3806 if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP)
3807 return TXRX_CONTINUE;
3808
3809 /* Drop unencrypted frames if key is set. */
3810 if (unlikely(!(rx->fc & IEEE80211_FCTL_PROTECTED) &&
3811 (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
3812 (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC &&
3813 (rx->key || rx->sdata->drop_unencrypted) &&
3814 (rx->sdata->eapol == 0 ||
3815 !ieee80211_is_eapol(rx->skb)))) {
3816 printk(KERN_DEBUG "%s: RX non-WEP frame, but expected "
3817 "encryption\n", rx->dev->name);
3818 return TXRX_DROP;
3819 }
3820 return TXRX_CONTINUE;
3821 }
3822
3823
3824 static ieee80211_txrx_result
3825 ieee80211_rx_h_mgmt(struct ieee80211_txrx_data *rx)
3826 {
3827 struct ieee80211_sub_if_data *sdata;
3828
3829 if (!rx->u.rx.ra_match)
3830 return TXRX_DROP;
3831
3832 sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
3833 if ((sdata->type == IEEE80211_IF_TYPE_STA ||
3834 sdata->type == IEEE80211_IF_TYPE_IBSS) &&
3835 !rx->local->user_space_mlme) {
3836 ieee80211_sta_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status);
3837 } else {
3838 /* Management frames are sent to hostapd for processing */
3839 if (!rx->local->apdev)
3840 return TXRX_DROP;
3841 ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
3842 ieee80211_msg_normal);
3843 }
3844 return TXRX_QUEUED;
3845 }
3846
3847
3848 static ieee80211_txrx_result
3849 ieee80211_rx_h_passive_scan(struct ieee80211_txrx_data *rx)
3850 {
3851 struct ieee80211_local *local = rx->local;
3852 struct sk_buff *skb = rx->skb;
3853
3854 if (unlikely(local->sta_scanning != 0)) {
3855 ieee80211_sta_rx_scan(rx->dev, skb, rx->u.rx.status);
3856 return TXRX_QUEUED;
3857 }
3858
3859 if (unlikely(rx->u.rx.in_scan)) {
3860 /* scanning finished during invoking of handlers */
3861 I802_DEBUG_INC(local->rx_handlers_drop_passive_scan);
3862 return TXRX_DROP;
3863 }
3864
3865 return TXRX_CONTINUE;
3866 }
3867
3868
3869 static void ieee80211_rx_michael_mic_report(struct net_device *dev,
3870 struct ieee80211_hdr *hdr,
3871 struct sta_info *sta,
3872 struct ieee80211_txrx_data *rx)
3873 {
3874 int keyidx, hdrlen;
3875
3876 hdrlen = ieee80211_get_hdrlen_from_skb(rx->skb);
3877 if (rx->skb->len >= hdrlen + 4)
3878 keyidx = rx->skb->data[hdrlen + 3] >> 6;
3879 else
3880 keyidx = -1;
3881
3882 /* TODO: verify that this is not triggered by fragmented
3883 * frames (hw does not verify MIC for them). */
3884 printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC "
3885 "failure from " MAC_FMT " to " MAC_FMT " keyidx=%d\n",
3886 dev->name, MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr1), keyidx);
3887
3888 if (!sta) {
3889 /* Some hardware versions seem to generate incorrect
3890 * Michael MIC reports; ignore them to avoid triggering
3891 * countermeasures. */
3892 printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
3893 "error for unknown address " MAC_FMT "\n",
3894 dev->name, MAC_ARG(hdr->addr2));
3895 goto ignore;
3896 }
3897
3898 if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) {
3899 printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
3900 "error for a frame with no ISWEP flag (src "
3901 MAC_FMT ")\n", dev->name, MAC_ARG(hdr->addr2));
3902 goto ignore;
3903 }
3904
3905 if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) &&
3906 rx->sdata->type == IEEE80211_IF_TYPE_AP) {
3907 keyidx = ieee80211_wep_get_keyidx(rx->skb);
3908 /* AP with Pairwise keys support should never receive Michael
3909 * MIC errors for non-zero keyidx because these are reserved
3910 * for group keys and only the AP is sending real multicast
3911 * frames in BSS. */
3912 if (keyidx) {
3913 printk(KERN_DEBUG "%s: ignored Michael MIC error for "
3914 "a frame with non-zero keyidx (%d) (src " MAC_FMT
3915 ")\n", dev->name, keyidx, MAC_ARG(hdr->addr2));
3916 goto ignore;
3917 }
3918 }
3919
3920 if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
3921 ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
3922 (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)) {
3923 printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
3924 "error for a frame that cannot be encrypted "
3925 "(fc=0x%04x) (src " MAC_FMT ")\n",
3926 dev->name, rx->fc, MAC_ARG(hdr->addr2));
3927 goto ignore;
3928 }
3929
3930 do {
3931 union iwreq_data wrqu;
3932 char *buf = kmalloc(128, GFP_ATOMIC);
3933 if (!buf)
3934 break;
3935
3936 /* TODO: needed parameters: count, key type, TSC */
3937 sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
3938 "keyid=%d %scast addr=" MAC_FMT ")",
3939 keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni",
3940 MAC_ARG(hdr->addr2));
3941 memset(&wrqu, 0, sizeof(wrqu));
3942 wrqu.data.length = strlen(buf);
3943 wireless_send_event(rx->dev, IWEVCUSTOM, &wrqu, buf);
3944 kfree(buf);
3945 } while (0);
3946
3947 /* TODO: consider verifying the MIC error report with software
3948 * implementation if we get too many spurious reports from the
3949 * hardware. */
3950 if (!rx->local->apdev)
3951 goto ignore;
3952 ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
3953 ieee80211_msg_michael_mic_failure);
3954 return;
3955
3956 ignore:
3957 dev_kfree_skb(rx->skb);
3958 rx->skb = NULL;
3959 }
3960
3961 static inline ieee80211_txrx_result __ieee80211_invoke_rx_handlers(
3962 struct ieee80211_local *local,
3963 ieee80211_rx_handler *handlers,
3964 struct ieee80211_txrx_data *rx,
3965 struct sta_info *sta)
3966 {
3967 ieee80211_rx_handler *handler;
3968 ieee80211_txrx_result res = TXRX_DROP;
3969
3970 for (handler = handlers; *handler != NULL; handler++) {
3971 res = (*handler)(rx);
3972 if (res != TXRX_CONTINUE) {
3973 if (res == TXRX_DROP) {
3974 I802_DEBUG_INC(local->rx_handlers_drop);
3975 if (sta)
3976 sta->rx_dropped++;
3977 }
3978 if (res == TXRX_QUEUED)
3979 I802_DEBUG_INC(local->rx_handlers_queued);
3980 break;
3981 }
3982 }
3983
3984 if (res == TXRX_DROP) {
3985 dev_kfree_skb(rx->skb);
3986 }
3987 return res;
3988 }
3989
3990 static inline void ieee80211_invoke_rx_handlers(struct ieee80211_local *local,
3991 ieee80211_rx_handler *handlers,
3992 struct ieee80211_txrx_data *rx,
3993 struct sta_info *sta)
3994 {
3995 if (__ieee80211_invoke_rx_handlers(local, handlers, rx, sta) ==
3996 TXRX_CONTINUE)
3997 dev_kfree_skb(rx->skb);
3998 }
3999
4000 /*
4001 * This is the receive path handler. It is called by a low level driver when an
4002 * 802.11 MPDU is received from the hardware.
4003 */
4004 void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
4005 struct ieee80211_rx_status *status)
4006 {
4007 struct ieee80211_local *local = hw_to_local(hw);
4008 struct ieee80211_sub_if_data *sdata;
4009 struct sta_info *sta;
4010 struct ieee80211_hdr *hdr;
4011 struct ieee80211_txrx_data rx;
4012 u16 type;
4013 int multicast;
4014 int radiotap_len = 0;
4015
4016 if (status->flag & RX_FLAG_RADIOTAP) {
4017 radiotap_len = ieee80211_get_radiotap_len(skb);
4018 skb_pull(skb, radiotap_len);
4019 }
4020
4021 hdr = (struct ieee80211_hdr *) skb->data;
4022 memset(&rx, 0, sizeof(rx));
4023 rx.skb = skb;
4024 rx.local = local;
4025
4026 rx.u.rx.status = status;
4027 rx.fc = skb->len >= 2 ? le16_to_cpu(hdr->frame_control) : 0;
4028 type = rx.fc & IEEE80211_FCTL_FTYPE;
4029 if (type == IEEE80211_FTYPE_DATA || type == IEEE80211_FTYPE_MGMT)
4030 local->dot11ReceivedFragmentCount++;
4031 multicast = is_multicast_ether_addr(hdr->addr1);
4032
4033 if (skb->len >= 16)
4034 sta = rx.sta = sta_info_get(local, hdr->addr2);
4035 else
4036 sta = rx.sta = NULL;
4037
4038 if (sta) {
4039 rx.dev = sta->dev;
4040 rx.sdata = IEEE80211_DEV_TO_SUB_IF(rx.dev);
4041 }
4042
4043 if ((status->flag & RX_FLAG_MMIC_ERROR)) {
4044 ieee80211_rx_michael_mic_report(local->mdev, hdr, sta, &rx);
4045 goto end;
4046 }
4047
4048 if (unlikely(local->sta_scanning))
4049 rx.u.rx.in_scan = 1;
4050
4051 if (__ieee80211_invoke_rx_handlers(local, local->rx_pre_handlers, &rx,
4052 sta) != TXRX_CONTINUE)
4053 goto end;
4054 skb = rx.skb;
4055
4056 skb_push(skb, radiotap_len);
4057 if (sta && !sta->assoc_ap && !(sta->flags & WLAN_STA_WDS) &&
4058 !local->iff_promiscs && !multicast) {
4059 rx.u.rx.ra_match = 1;
4060 ieee80211_invoke_rx_handlers(local, local->rx_handlers, &rx,
4061 sta);
4062 } else {
4063 struct ieee80211_sub_if_data *prev = NULL;
4064 struct sk_buff *skb_new;
4065 u8 *bssid = ieee80211_get_bssid(hdr, skb->len - radiotap_len);
4066
4067 read_lock(&local->sub_if_lock);
4068 list_for_each_entry(sdata, &local->sub_if_list, list) {
4069 rx.u.rx.ra_match = 1;
4070 switch (sdata->type) {
4071 case IEEE80211_IF_TYPE_STA:
4072 if (!bssid)
4073 continue;
4074 if (!ieee80211_bssid_match(bssid,
4075 sdata->u.sta.bssid)) {
4076 if (!rx.u.rx.in_scan)
4077 continue;
4078 rx.u.rx.ra_match = 0;
4079 } else if (!multicast &&
4080 compare_ether_addr(sdata->dev->dev_addr,
4081 hdr->addr1) != 0) {
4082 if (!sdata->promisc)
4083 continue;
4084 rx.u.rx.ra_match = 0;
4085 }
4086 break;
4087 case IEEE80211_IF_TYPE_IBSS:
4088 if (!bssid)
4089 continue;
4090 if (!ieee80211_bssid_match(bssid,
4091 sdata->u.sta.bssid)) {
4092 if (!rx.u.rx.in_scan)
4093 continue;
4094 rx.u.rx.ra_match = 0;
4095 } else if (!multicast &&
4096 compare_ether_addr(sdata->dev->dev_addr,
4097 hdr->addr1) != 0) {
4098 if (!sdata->promisc)
4099 continue;
4100 rx.u.rx.ra_match = 0;
4101 } else if (!sta)
4102 sta = rx.sta =
4103 ieee80211_ibss_add_sta(sdata->dev,
4104 skb, bssid,
4105 hdr->addr2);
4106 break;
4107 case IEEE80211_IF_TYPE_AP:
4108 if (!bssid) {
4109 if (compare_ether_addr(sdata->dev->dev_addr,
4110 hdr->addr1) != 0)
4111 continue;
4112 } else if (!ieee80211_bssid_match(bssid,
4113 sdata->dev->dev_addr)) {
4114 if (!rx.u.rx.in_scan)
4115 continue;
4116 rx.u.rx.ra_match = 0;
4117 }
4118 if (sdata->dev == local->mdev &&
4119 !rx.u.rx.in_scan)
4120 /* do not receive anything via
4121 * master device when not scanning */
4122 continue;
4123 break;
4124 case IEEE80211_IF_TYPE_WDS:
4125 if (bssid ||
4126 (rx.fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
4127 continue;
4128 if (compare_ether_addr(sdata->u.wds.remote_addr,
4129 hdr->addr2) != 0)
4130 continue;
4131 break;
4132 }
4133
4134 if (prev) {
4135 skb_new = skb_copy(skb, GFP_ATOMIC);
4136 if (!skb_new) {
4137 if (net_ratelimit())
4138 printk(KERN_DEBUG "%s: failed to copy "
4139 "multicast frame for %s",
4140 local->mdev->name, prev->dev->name);
4141 continue;
4142 }
4143 rx.skb = skb_new;
4144 rx.dev = prev->dev;
4145 rx.sdata = prev;
4146 ieee80211_invoke_rx_handlers(local,
4147 local->rx_handlers,
4148 &rx, sta);
4149 }
4150 prev = sdata;
4151 }
4152 if (prev) {
4153 rx.skb = skb;
4154 rx.dev = prev->dev;
4155 rx.sdata = prev;
4156 ieee80211_invoke_rx_handlers(local, local->rx_handlers,
4157 &rx, sta);
4158 } else
4159 dev_kfree_skb(skb);
4160 read_unlock(&local->sub_if_lock);
4161 }
4162
4163 end:
4164 if (sta)
4165 sta_info_put(sta);
4166 }
4167 EXPORT_SYMBOL(__ieee80211_rx);
4168
4169 static ieee80211_txrx_result
4170 ieee80211_tx_h_load_stats(struct ieee80211_txrx_data *tx)
4171 {
4172 struct ieee80211_local *local = tx->local;
4173 struct ieee80211_hw_mode *mode = tx->u.tx.mode;
4174 struct sk_buff *skb = tx->skb;
4175 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
4176 u32 load = 0, hdrtime;
4177
4178 /* TODO: this could be part of tx_status handling, so that the number
4179 * of retries would be known; TX rate should in that case be stored
4180 * somewhere with the packet */
4181
4182 /* Estimate total channel use caused by this frame */
4183
4184 /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values,
4185 * 1 usec = 1/8 * (1080 / 10) = 13.5 */
4186
4187 if (mode->mode == MODE_IEEE80211A ||
4188 mode->mode == MODE_ATHEROS_TURBO ||
4189 mode->mode == MODE_ATHEROS_TURBOG ||
4190 (mode->mode == MODE_IEEE80211G &&
4191 tx->u.tx.rate->flags & IEEE80211_RATE_ERP))
4192 hdrtime = CHAN_UTIL_HDR_SHORT;
4193 else
4194 hdrtime = CHAN_UTIL_HDR_LONG;
4195
4196 load = hdrtime;
4197 if (!is_multicast_ether_addr(hdr->addr1))
4198 load += hdrtime;
4199
4200 if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_RTS_CTS)
4201 load += 2 * hdrtime;
4202 else if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
4203 load += hdrtime;
4204
4205 load += skb->len * tx->u.tx.rate->rate_inv;
4206
4207 if (tx->u.tx.extra_frag) {
4208 int i;
4209 for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
4210 load += 2 * hdrtime;
4211 load += tx->u.tx.extra_frag[i]->len *
4212 tx->u.tx.rate->rate;
4213 }
4214 }
4215
4216 /* Divide channel_use by 8 to avoid wrapping around the counter */
4217 load >>= CHAN_UTIL_SHIFT;
4218 local->channel_use_raw += load;
4219 if (tx->sta)
4220 tx->sta->channel_use_raw += load;
4221 tx->sdata->channel_use_raw += load;
4222
4223 return TXRX_CONTINUE;
4224 }
4225
4226
4227 static ieee80211_txrx_result
4228 ieee80211_rx_h_load_stats(struct ieee80211_txrx_data *rx)
4229 {
4230 struct ieee80211_local *local = rx->local;
4231 struct sk_buff *skb = rx->skb;
4232 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
4233 u32 load = 0, hdrtime;
4234 struct ieee80211_rate *rate;
4235 struct ieee80211_hw_mode *mode = local->hw.conf.mode;
4236 int i;
4237
4238 /* Estimate total channel use caused by this frame */
4239
4240 if (unlikely(mode->num_rates < 0))
4241 return TXRX_CONTINUE;
4242
4243 rate = &mode->rates[0];
4244 for (i = 0; i < mode->num_rates; i++) {
4245 if (mode->rates[i].val == rx->u.rx.status->rate) {
4246 rate = &mode->rates[i];
4247 break;
4248 }
4249 }
4250
4251 /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values,
4252 * 1 usec = 1/8 * (1080 / 10) = 13.5 */
4253
4254 if (mode->mode == MODE_IEEE80211A ||
4255 mode->mode == MODE_ATHEROS_TURBO ||
4256 mode->mode == MODE_ATHEROS_TURBOG ||
4257 (mode->mode == MODE_IEEE80211G &&
4258 rate->flags & IEEE80211_RATE_ERP))
4259 hdrtime = CHAN_UTIL_HDR_SHORT;
4260 else
4261 hdrtime = CHAN_UTIL_HDR_LONG;
4262
4263 load = hdrtime;
4264 if (!is_multicast_ether_addr(hdr->addr1))
4265 load += hdrtime;
4266
4267 load += skb->len * rate->rate_inv;
4268
4269 /* Divide channel_use by 8 to avoid wrapping around the counter */
4270 load >>= CHAN_UTIL_SHIFT;
4271 local->channel_use_raw += load;
4272 if (rx->sta)
4273 rx->sta->channel_use_raw += load;
4274 rx->u.rx.load = load;
4275
4276 return TXRX_CONTINUE;
4277 }
4278
4279 static ieee80211_txrx_result
4280 ieee80211_rx_h_if_stats(struct ieee80211_txrx_data *rx)
4281 {
4282 rx->sdata->channel_use_raw += rx->u.rx.load;
4283 return TXRX_CONTINUE;
4284 }
4285
4286 static void ieee80211_stat_refresh(unsigned long data)
4287 {
4288 struct ieee80211_local *local = (struct ieee80211_local *) data;
4289 struct sta_info *sta;
4290 struct ieee80211_sub_if_data *sdata;
4291
4292 if (!local->stat_time)
4293 return;
4294
4295 /* go through all stations */
4296 spin_lock_bh(&local->sta_lock);
4297 list_for_each_entry(sta, &local->sta_list, list) {
4298 sta->channel_use = (sta->channel_use_raw / local->stat_time) /
4299 CHAN_UTIL_PER_10MS;
4300 sta->channel_use_raw = 0;
4301 }
4302 spin_unlock_bh(&local->sta_lock);
4303
4304 /* go through all subinterfaces */
4305 read_lock(&local->sub_if_lock);
4306 list_for_each_entry(sdata, &local->sub_if_list, list) {
4307 sdata->channel_use = (sdata->channel_use_raw /
4308 local->stat_time) / CHAN_UTIL_PER_10MS;
4309 sdata->channel_use_raw = 0;
4310 }
4311 read_unlock(&local->sub_if_lock);
4312
4313 /* hardware interface */
4314 local->channel_use = (local->channel_use_raw /
4315 local->stat_time) / CHAN_UTIL_PER_10MS;
4316 local->channel_use_raw = 0;
4317
4318 local->stat_timer.expires = jiffies + HZ * local->stat_time / 100;
4319 add_timer(&local->stat_timer);
4320 }
4321
4322
4323 /* This is a version of the rx handler that can be called from hard irq
4324 * context. Post the skb on the queue and schedule the tasklet */
4325 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb,
4326 struct ieee80211_rx_status *status)
4327 {
4328 struct ieee80211_local *local = hw_to_local(hw);
4329
4330 BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb));
4331
4332 skb->dev = local->mdev;
4333 /* copy status into skb->cb for use by tasklet */
4334 memcpy(skb->cb, status, sizeof(*status));
4335 skb->pkt_type = IEEE80211_RX_MSG;
4336 skb_queue_tail(&local->skb_queue, skb);
4337 tasklet_schedule(&local->tasklet);
4338 }
4339 EXPORT_SYMBOL(ieee80211_rx_irqsafe);
4340
4341 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
4342 struct sk_buff *skb,
4343 struct ieee80211_tx_status *status)
4344 {
4345 struct ieee80211_local *local = hw_to_local(hw);
4346 struct ieee80211_tx_status *saved;
4347 int tmp;
4348
4349 skb->dev = local->mdev;
4350 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
4351 if (unlikely(!saved)) {
4352 if (net_ratelimit())
4353 printk(KERN_WARNING "%s: Not enough memory, "
4354 "dropping tx status", skb->dev->name);
4355 /* should be dev_kfree_skb_irq, but due to this function being
4356 * named _irqsafe instead of just _irq we can't be sure that
4357 * people won't call it from non-irq contexts */
4358 dev_kfree_skb_any(skb);
4359 return;
4360 }
4361 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
4362 /* copy pointer to saved status into skb->cb for use by tasklet */
4363 memcpy(skb->cb, &saved, sizeof(saved));
4364
4365 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
4366 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
4367 &local->skb_queue : &local->skb_queue_unreliable, skb);
4368 tmp = skb_queue_len(&local->skb_queue) +
4369 skb_queue_len(&local->skb_queue_unreliable);
4370 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
4371 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
4372 memcpy(&saved, skb->cb, sizeof(saved));
4373 kfree(saved);
4374 dev_kfree_skb_irq(skb);
4375 tmp--;
4376 I802_DEBUG_INC(local->tx_status_drop);
4377 }
4378 tasklet_schedule(&local->tasklet);
4379 }
4380 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
4381
4382 static void ieee80211_tasklet_handler(unsigned long data)
4383 {
4384 struct ieee80211_local *local = (struct ieee80211_local *) data;
4385 struct sk_buff *skb;
4386 struct ieee80211_rx_status rx_status;
4387 struct ieee80211_tx_status *tx_status;
4388
4389 while ((skb = skb_dequeue(&local->skb_queue)) ||
4390 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
4391 switch (skb->pkt_type) {
4392 case IEEE80211_RX_MSG:
4393 /* status is in skb->cb */
4394 memcpy(&rx_status, skb->cb, sizeof(rx_status));
4395 /* Clear skb->type in order to not confuse kernel
4396 * netstack. */
4397 skb->pkt_type = 0;
4398 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
4399 break;
4400 case IEEE80211_TX_STATUS_MSG:
4401 /* get pointer to saved status out of skb->cb */
4402 memcpy(&tx_status, skb->cb, sizeof(tx_status));
4403 skb->pkt_type = 0;
4404 ieee80211_tx_status(local_to_hw(local),
4405 skb, tx_status);
4406 kfree(tx_status);
4407 break;
4408 default: /* should never get here! */
4409 printk(KERN_ERR "%s: Unknown message type (%d)\n",
4410 local->mdev->name, skb->pkt_type);
4411 dev_kfree_skb(skb);
4412 break;
4413 }
4414 }
4415 }
4416
4417
4418 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
4419 * make a prepared TX frame (one that has been given to hw) to look like brand
4420 * new IEEE 802.11 frame that is ready to go through TX processing again.
4421 * Also, tx_packet_data in cb is restored from tx_control. */
4422 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
4423 struct ieee80211_key *key,
4424 struct sk_buff *skb,
4425 struct ieee80211_tx_control *control)
4426 {
4427 int hdrlen, iv_len, mic_len;
4428 struct ieee80211_tx_packet_data *pkt_data;
4429
4430 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
4431 pkt_data->ifindex = control->ifindex;
4432 pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT);
4433 pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS);
4434 pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT);
4435 pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE);
4436 pkt_data->queue = control->queue;
4437
4438 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
4439
4440 if (!key)
4441 goto no_key;
4442
4443 switch (key->alg) {
4444 case ALG_WEP:
4445 iv_len = WEP_IV_LEN;
4446 mic_len = WEP_ICV_LEN;
4447 break;
4448 case ALG_TKIP:
4449 iv_len = TKIP_IV_LEN;
4450 mic_len = TKIP_ICV_LEN;
4451 break;
4452 case ALG_CCMP:
4453 iv_len = CCMP_HDR_LEN;
4454 mic_len = CCMP_MIC_LEN;
4455 break;
4456 default:
4457 goto no_key;
4458 }
4459
4460 if (skb->len >= mic_len && key->force_sw_encrypt)
4461 skb_trim(skb, skb->len - mic_len);
4462 if (skb->len >= iv_len && skb->len > hdrlen) {
4463 memmove(skb->data + iv_len, skb->data, hdrlen);
4464 skb_pull(skb, iv_len);
4465 }
4466
4467 no_key:
4468 {
4469 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
4470 u16 fc = le16_to_cpu(hdr->frame_control);
4471 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
4472 fc &= ~IEEE80211_STYPE_QOS_DATA;
4473 hdr->frame_control = cpu_to_le16(fc);
4474 memmove(skb->data + 2, skb->data, hdrlen - 2);
4475 skb_pull(skb, 2);
4476 }
4477 }
4478 }
4479
4480
4481 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
4482 struct ieee80211_tx_status *status)
4483 {
4484 struct sk_buff *skb2;
4485 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
4486 struct ieee80211_local *local = hw_to_local(hw);
4487 u16 frag, type;
4488 u32 msg_type;
4489 struct ieee80211_tx_status_rtap_hdr *rthdr;
4490 struct ieee80211_sub_if_data *sdata;
4491 int monitors;
4492
4493 if (!status) {
4494 printk(KERN_ERR
4495 "%s: ieee80211_tx_status called with NULL status\n",
4496 local->mdev->name);
4497 dev_kfree_skb(skb);
4498 return;
4499 }
4500
4501 if (status->excessive_retries) {
4502 struct sta_info *sta;
4503 sta = sta_info_get(local, hdr->addr1);
4504 if (sta) {
4505 if (sta->flags & WLAN_STA_PS) {
4506 /* The STA is in power save mode, so assume
4507 * that this TX packet failed because of that.
4508 */
4509 status->excessive_retries = 0;
4510 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
4511 }
4512 sta_info_put(sta);
4513 }
4514 }
4515
4516 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
4517 struct sta_info *sta;
4518 sta = sta_info_get(local, hdr->addr1);
4519 if (sta) {
4520 sta->tx_filtered_count++;
4521
4522 /* Clear the TX filter mask for this STA when sending
4523 * the next packet. If the STA went to power save mode,
4524 * this will happen when it is waking up for the next
4525 * time. */
4526 sta->clear_dst_mask = 1;
4527
4528 /* TODO: Is the WLAN_STA_PS flag always set here or is
4529 * the race between RX and TX status causing some
4530 * packets to be filtered out before 80211.o gets an
4531 * update for PS status? This seems to be the case, so
4532 * no changes are likely to be needed. */
4533 if (sta->flags & WLAN_STA_PS &&
4534 skb_queue_len(&sta->tx_filtered) <
4535 STA_MAX_TX_BUFFER) {
4536 ieee80211_remove_tx_extra(local, sta->key,
4537 skb,
4538 &status->control);
4539 skb_queue_tail(&sta->tx_filtered, skb);
4540 } else if (!(sta->flags & WLAN_STA_PS) &&
4541 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
4542 /* Software retry the packet once */
4543 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
4544 ieee80211_remove_tx_extra(local, sta->key,
4545 skb,
4546 &status->control);
4547 dev_queue_xmit(skb);
4548 } else {
4549 if (net_ratelimit()) {
4550 printk(KERN_DEBUG "%s: dropped TX "
4551 "filtered frame queue_len=%d "
4552 "PS=%d @%lu\n",
4553 local->mdev->name,
4554 skb_queue_len(
4555 &sta->tx_filtered),
4556 !!(sta->flags & WLAN_STA_PS),
4557 jiffies);
4558 }
4559 dev_kfree_skb(skb);
4560 }
4561 sta_info_put(sta);
4562 return;
4563 }
4564 } else {
4565 /* FIXME: STUPID to call this with both local and local->mdev */
4566 rate_control_tx_status(local, local->mdev, skb, status);
4567 }
4568
4569 ieee80211_led_tx(local, 0);
4570
4571 /* SNMP counters
4572 * Fragments are passed to low-level drivers as separate skbs, so these
4573 * are actually fragments, not frames. Update frame counters only for
4574 * the first fragment of the frame. */
4575
4576 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
4577 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
4578
4579 if (status->flags & IEEE80211_TX_STATUS_ACK) {
4580 if (frag == 0) {
4581 local->dot11TransmittedFrameCount++;
4582 if (is_multicast_ether_addr(hdr->addr1))
4583 local->dot11MulticastTransmittedFrameCount++;
4584 if (status->retry_count > 0)
4585 local->dot11RetryCount++;
4586 if (status->retry_count > 1)
4587 local->dot11MultipleRetryCount++;
4588 }
4589
4590 /* This counter shall be incremented for an acknowledged MPDU
4591 * with an individual address in the address 1 field or an MPDU
4592 * with a multicast address in the address 1 field of type Data
4593 * or Management. */
4594 if (!is_multicast_ether_addr(hdr->addr1) ||
4595 type == IEEE80211_FTYPE_DATA ||
4596 type == IEEE80211_FTYPE_MGMT)
4597 local->dot11TransmittedFragmentCount++;
4598 } else {
4599 if (frag == 0)
4600 local->dot11FailedCount++;
4601 }
4602
4603 msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
4604 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
4605
4606 /* this was a transmitted frame, but now we want to reuse it */
4607 skb_orphan(skb);
4608
4609 if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
4610 local->apdev) {
4611 if (local->monitors) {
4612 skb2 = skb_clone(skb, GFP_ATOMIC);
4613 } else {
4614 skb2 = skb;
4615 skb = NULL;
4616 }
4617
4618 if (skb2)
4619 /* Send frame to hostapd */
4620 ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
4621
4622 if (!skb)
4623 return;
4624 }
4625
4626 if (!local->monitors) {
4627 dev_kfree_skb(skb);
4628 return;
4629 }
4630
4631 /* send frame to monitor interfaces now */
4632
4633 if (skb_headroom(skb) < sizeof(*rthdr)) {
4634 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
4635 dev_kfree_skb(skb);
4636 return;
4637 }
4638
4639 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
4640 skb_push(skb, sizeof(*rthdr));
4641
4642 memset(rthdr, 0, sizeof(*rthdr));
4643 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
4644 rthdr->hdr.it_present =
4645 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
4646 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
4647
4648 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
4649 !is_multicast_ether_addr(hdr->addr1))
4650 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
4651
4652 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
4653 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
4654 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
4655 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
4656 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
4657
4658 rthdr->data_retries = status->retry_count;
4659
4660 read_lock(&local->sub_if_lock);
4661 monitors = local->monitors;
4662 list_for_each_entry(sdata, &local->sub_if_list, list) {
4663 /*
4664 * Using the monitors counter is possibly racy, but
4665 * if the value is wrong we simply either clone the skb
4666 * once too much or forget sending it to one monitor iface
4667 * The latter case isn't nice but fixing the race is much
4668 * more complicated.
4669 */
4670 if (!monitors || !skb)
4671 goto out;
4672
4673 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
4674 if (!netif_running(sdata->dev))
4675 continue;
4676 monitors--;
4677 if (monitors)
4678 skb2 = skb_clone(skb, GFP_KERNEL);
4679 else
4680 skb2 = NULL;
4681 skb->dev = sdata->dev;
4682 /* XXX: is this sufficient for BPF? */
4683 skb_set_mac_header(skb, 0);
4684 skb->ip_summed = CHECKSUM_UNNECESSARY;
4685 skb->pkt_type = PACKET_OTHERHOST;
4686 skb->protocol = htons(ETH_P_802_2);
4687 memset(skb->cb, 0, sizeof(skb->cb));
4688 netif_rx(skb);
4689 skb = skb2;
4690 }
4691 }
4692 out:
4693 read_unlock(&local->sub_if_lock);
4694 if (skb)
4695 dev_kfree_skb(skb);
4696 }
4697 EXPORT_SYMBOL(ieee80211_tx_status);
4698
4699 /* TODO: implement register/unregister functions for adding TX/RX handlers
4700 * into ordered list */
4701
4702 /* rx_pre handlers don't have dev and sdata fields available in
4703 * ieee80211_txrx_data */
4704 static ieee80211_rx_handler ieee80211_rx_pre_handlers[] =
4705 {
4706 ieee80211_rx_h_parse_qos,
4707 ieee80211_rx_h_load_stats,
4708 NULL
4709 };
4710
4711 static ieee80211_rx_handler ieee80211_rx_handlers[] =
4712 {
4713 ieee80211_rx_h_if_stats,
4714 ieee80211_rx_h_monitor,
4715 ieee80211_rx_h_passive_scan,
4716 ieee80211_rx_h_check,
4717 ieee80211_rx_h_sta_process,
4718 ieee80211_rx_h_ccmp_decrypt,
4719 ieee80211_rx_h_tkip_decrypt,
4720 ieee80211_rx_h_wep_weak_iv_detection,
4721 ieee80211_rx_h_wep_decrypt,
4722 ieee80211_rx_h_defragment,
4723 ieee80211_rx_h_ps_poll,
4724 ieee80211_rx_h_michael_mic_verify,
4725 /* this must be after decryption - so header is counted in MPDU mic
4726 * must be before pae and data, so QOS_DATA format frames
4727 * are not passed to user space by these functions
4728 */
4729 ieee80211_rx_h_remove_qos_control,
4730 ieee80211_rx_h_802_1x_pae,
4731 ieee80211_rx_h_drop_unencrypted,
4732 ieee80211_rx_h_data,
4733 ieee80211_rx_h_mgmt,
4734 NULL
4735 };
4736
4737 static ieee80211_tx_handler ieee80211_tx_handlers[] =
4738 {
4739 ieee80211_tx_h_check_assoc,
4740 ieee80211_tx_h_sequence,
4741 ieee80211_tx_h_ps_buf,
4742 ieee80211_tx_h_select_key,
4743 ieee80211_tx_h_michael_mic_add,
4744 ieee80211_tx_h_fragment,
4745 ieee80211_tx_h_tkip_encrypt,
4746 ieee80211_tx_h_ccmp_encrypt,
4747 ieee80211_tx_h_wep_encrypt,
4748 ieee80211_tx_h_rate_ctrl,
4749 ieee80211_tx_h_misc,
4750 ieee80211_tx_h_load_stats,
4751 NULL
4752 };
4753
4754
4755 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
4756 {
4757 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4758 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4759 struct sta_info *sta;
4760
4761 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
4762 return 0;
4763
4764 /* Create STA entry for the new peer */
4765 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
4766 if (!sta)
4767 return -ENOMEM;
4768 sta_info_put(sta);
4769
4770 /* Remove STA entry for the old peer */
4771 sta = sta_info_get(local, sdata->u.wds.remote_addr);
4772 if (sta) {
4773 sta_info_put(sta);
4774 sta_info_free(sta, 0);
4775 } else {
4776 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
4777 "peer " MAC_FMT "\n",
4778 dev->name, MAC_ARG(sdata->u.wds.remote_addr));
4779 }
4780
4781 /* Update WDS link data */
4782 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
4783
4784 return 0;
4785 }
4786
4787 /* Must not be called for mdev and apdev */
4788 void ieee80211_if_setup(struct net_device *dev)
4789 {
4790 ether_setup(dev);
4791 dev->hard_start_xmit = ieee80211_subif_start_xmit;
4792 dev->wireless_handlers = &ieee80211_iw_handler_def;
4793 dev->set_multicast_list = ieee80211_set_multicast_list;
4794 dev->change_mtu = ieee80211_change_mtu;
4795 dev->get_stats = ieee80211_get_stats;
4796 dev->open = ieee80211_open;
4797 dev->stop = ieee80211_stop;
4798 dev->uninit = ieee80211_if_reinit;
4799 dev->destructor = ieee80211_if_free;
4800 }
4801
4802 void ieee80211_if_mgmt_setup(struct net_device *dev)
4803 {
4804 ether_setup(dev);
4805 dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
4806 dev->change_mtu = ieee80211_change_mtu_apdev;
4807 dev->get_stats = ieee80211_get_stats;
4808 dev->open = ieee80211_mgmt_open;
4809 dev->stop = ieee80211_mgmt_stop;
4810 dev->type = ARPHRD_IEEE80211_PRISM;
4811 dev->hard_header_parse = header_parse_80211;
4812 dev->uninit = ieee80211_if_reinit;
4813 dev->destructor = ieee80211_if_free;
4814 }
4815
4816 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
4817 const char *name)
4818 {
4819 struct rate_control_ref *ref, *old;
4820
4821 ASSERT_RTNL();
4822 if (local->open_count || netif_running(local->mdev) ||
4823 (local->apdev && netif_running(local->apdev)))
4824 return -EBUSY;
4825
4826 ref = rate_control_alloc(name, local);
4827 if (!ref) {
4828 printk(KERN_WARNING "%s: Failed to select rate control "
4829 "algorithm\n", local->mdev->name);
4830 return -ENOENT;
4831 }
4832
4833 old = local->rate_ctrl;
4834 local->rate_ctrl = ref;
4835 if (old) {
4836 rate_control_put(old);
4837 sta_info_flush(local, NULL);
4838 }
4839
4840 printk(KERN_DEBUG "%s: Selected rate control "
4841 "algorithm '%s'\n", local->mdev->name,
4842 ref->ops->name);
4843
4844
4845 return 0;
4846 }
4847
4848 static void rate_control_deinitialize(struct ieee80211_local *local)
4849 {
4850 struct rate_control_ref *ref;
4851
4852 ref = local->rate_ctrl;
4853 local->rate_ctrl = NULL;
4854 rate_control_put(ref);
4855 }
4856
4857 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
4858 const struct ieee80211_ops *ops)
4859 {
4860 struct net_device *mdev;
4861 struct ieee80211_local *local;
4862 struct ieee80211_sub_if_data *sdata;
4863 int priv_size;
4864 struct wiphy *wiphy;
4865
4866 /* Ensure 32-byte alignment of our private data and hw private data.
4867 * We use the wiphy priv data for both our ieee80211_local and for
4868 * the driver's private data
4869 *
4870 * In memory it'll be like this:
4871 *
4872 * +-------------------------+
4873 * | struct wiphy |
4874 * +-------------------------+
4875 * | struct ieee80211_local |
4876 * +-------------------------+
4877 * | driver's private data |
4878 * +-------------------------+
4879 *
4880 */
4881 priv_size = ((sizeof(struct ieee80211_local) +
4882 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
4883 priv_data_len;
4884
4885 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
4886
4887 if (!wiphy)
4888 return NULL;
4889
4890 wiphy->privid = mac80211_wiphy_privid;
4891
4892 local = wiphy_priv(wiphy);
4893 local->hw.wiphy = wiphy;
4894
4895 local->hw.priv = (char *)local +
4896 ((sizeof(struct ieee80211_local) +
4897 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
4898
4899 BUG_ON(!ops->tx);
4900 BUG_ON(!ops->config);
4901 BUG_ON(!ops->add_interface);
4902 local->ops = ops;
4903
4904 /* for now, mdev needs sub_if_data :/ */
4905 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
4906 "wmaster%d", ether_setup);
4907 if (!mdev) {
4908 wiphy_free(wiphy);
4909 return NULL;
4910 }
4911
4912 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
4913 mdev->ieee80211_ptr = &sdata->wdev;
4914 sdata->wdev.wiphy = wiphy;
4915
4916 local->hw.queues = 1; /* default */
4917
4918 local->mdev = mdev;
4919 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
4920 local->rx_handlers = ieee80211_rx_handlers;
4921 local->tx_handlers = ieee80211_tx_handlers;
4922
4923 local->bridge_packets = 1;
4924
4925 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
4926 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
4927 local->short_retry_limit = 7;
4928 local->long_retry_limit = 4;
4929 local->hw.conf.radio_enabled = 1;
4930
4931 local->enabled_modes = (unsigned int) -1;
4932
4933 INIT_LIST_HEAD(&local->modes_list);
4934
4935 rwlock_init(&local->sub_if_lock);
4936 INIT_LIST_HEAD(&local->sub_if_list);
4937
4938 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
4939 init_timer(&local->stat_timer);
4940 local->stat_timer.function = ieee80211_stat_refresh;
4941 local->stat_timer.data = (unsigned long) local;
4942 ieee80211_rx_bss_list_init(mdev);
4943
4944 sta_info_init(local);
4945
4946 mdev->hard_start_xmit = ieee80211_master_start_xmit;
4947 mdev->open = ieee80211_master_open;
4948 mdev->stop = ieee80211_master_stop;
4949 mdev->type = ARPHRD_IEEE80211;
4950 mdev->hard_header_parse = header_parse_80211;
4951
4952 sdata->type = IEEE80211_IF_TYPE_AP;
4953 sdata->dev = mdev;
4954 sdata->local = local;
4955 sdata->u.ap.force_unicast_rateidx = -1;
4956 sdata->u.ap.max_ratectrl_rateidx = -1;
4957 ieee80211_if_sdata_init(sdata);
4958 list_add_tail(&sdata->list, &local->sub_if_list);
4959
4960 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
4961 (unsigned long)local);
4962 tasklet_disable(&local->tx_pending_tasklet);
4963
4964 tasklet_init(&local->tasklet,
4965 ieee80211_tasklet_handler,
4966 (unsigned long) local);
4967 tasklet_disable(&local->tasklet);
4968
4969 skb_queue_head_init(&local->skb_queue);
4970 skb_queue_head_init(&local->skb_queue_unreliable);
4971
4972 return local_to_hw(local);
4973 }
4974 EXPORT_SYMBOL(ieee80211_alloc_hw);
4975
4976 int ieee80211_register_hw(struct ieee80211_hw *hw)
4977 {
4978 struct ieee80211_local *local = hw_to_local(hw);
4979 const char *name;
4980 int result;
4981
4982 result = wiphy_register(local->hw.wiphy);
4983 if (result < 0)
4984 return result;
4985
4986 name = wiphy_dev(local->hw.wiphy)->driver->name;
4987 local->hw.workqueue = create_singlethread_workqueue(name);
4988 if (!local->hw.workqueue) {
4989 result = -ENOMEM;
4990 goto fail_workqueue;
4991 }
4992
4993 /*
4994 * The hardware needs headroom for sending the frame,
4995 * and we need some headroom for passing the frame to monitor
4996 * interfaces, but never both at the same time.
4997 */
4998 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
4999 sizeof(struct ieee80211_tx_status_rtap_hdr));
5000
5001 debugfs_hw_add(local);
5002
5003 local->hw.conf.beacon_int = 1000;
5004
5005 local->wstats_flags |= local->hw.max_rssi ?
5006 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
5007 local->wstats_flags |= local->hw.max_signal ?
5008 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
5009 local->wstats_flags |= local->hw.max_noise ?
5010 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
5011 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
5012 local->wstats_flags |= IW_QUAL_DBM;
5013
5014 result = sta_info_start(local);
5015 if (result < 0)
5016 goto fail_sta_info;
5017
5018 rtnl_lock();
5019 result = dev_alloc_name(local->mdev, local->mdev->name);
5020 if (result < 0)
5021 goto fail_dev;
5022
5023 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
5024 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
5025
5026 result = register_netdevice(local->mdev);
5027 if (result < 0)
5028 goto fail_dev;
5029
5030 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
5031
5032 result = ieee80211_init_rate_ctrl_alg(local, NULL);
5033 if (result < 0) {
5034 printk(KERN_DEBUG "%s: Failed to initialize rate control "
5035 "algorithm\n", local->mdev->name);
5036 goto fail_rate;
5037 }
5038
5039 result = ieee80211_wep_init(local);
5040
5041 if (result < 0) {
5042 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
5043 local->mdev->name);
5044 goto fail_wep;
5045 }
5046
5047 ieee80211_install_qdisc(local->mdev);
5048
5049 /* add one default STA interface */
5050 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
5051 IEEE80211_IF_TYPE_STA);
5052 if (result)
5053 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
5054 local->mdev->name);
5055
5056 local->reg_state = IEEE80211_DEV_REGISTERED;
5057 rtnl_unlock();
5058
5059 ieee80211_led_init(local);
5060
5061 return 0;
5062
5063 fail_wep:
5064 rate_control_deinitialize(local);
5065 fail_rate:
5066 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
5067 unregister_netdevice(local->mdev);
5068 fail_dev:
5069 rtnl_unlock();
5070 sta_info_stop(local);
5071 fail_sta_info:
5072 debugfs_hw_del(local);
5073 destroy_workqueue(local->hw.workqueue);
5074 fail_workqueue:
5075 wiphy_unregister(local->hw.wiphy);
5076 return result;
5077 }
5078 EXPORT_SYMBOL(ieee80211_register_hw);
5079
5080 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
5081 struct ieee80211_hw_mode *mode)
5082 {
5083 struct ieee80211_local *local = hw_to_local(hw);
5084 struct ieee80211_rate *rate;
5085 int i;
5086
5087 INIT_LIST_HEAD(&mode->list);
5088 list_add_tail(&mode->list, &local->modes_list);
5089
5090 local->hw_modes |= (1 << mode->mode);
5091 for (i = 0; i < mode->num_rates; i++) {
5092 rate = &(mode->rates[i]);
5093 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
5094 }
5095 ieee80211_prepare_rates(local, mode);
5096
5097 if (!local->oper_hw_mode) {
5098 /* Default to this mode */
5099 local->hw.conf.phymode = mode->mode;
5100 local->oper_hw_mode = local->scan_hw_mode = mode;
5101 local->oper_channel = local->scan_channel = &mode->channels[0];
5102 local->hw.conf.mode = local->oper_hw_mode;
5103 local->hw.conf.chan = local->oper_channel;
5104 }
5105
5106 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
5107 ieee80211_set_default_regdomain(mode);
5108
5109 return 0;
5110 }
5111 EXPORT_SYMBOL(ieee80211_register_hwmode);
5112
5113 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
5114 {
5115 struct ieee80211_local *local = hw_to_local(hw);
5116 struct ieee80211_sub_if_data *sdata, *tmp;
5117 struct list_head tmp_list;
5118 int i;
5119
5120 tasklet_kill(&local->tx_pending_tasklet);
5121 tasklet_kill(&local->tasklet);
5122
5123 rtnl_lock();
5124
5125 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
5126
5127 local->reg_state = IEEE80211_DEV_UNREGISTERED;
5128 if (local->apdev)
5129 ieee80211_if_del_mgmt(local);
5130
5131 write_lock_bh(&local->sub_if_lock);
5132 list_replace_init(&local->sub_if_list, &tmp_list);
5133 write_unlock_bh(&local->sub_if_lock);
5134
5135 list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
5136 __ieee80211_if_del(local, sdata);
5137
5138 rtnl_unlock();
5139
5140 if (local->stat_time)
5141 del_timer_sync(&local->stat_timer);
5142
5143 ieee80211_rx_bss_list_deinit(local->mdev);
5144 ieee80211_clear_tx_pending(local);
5145 sta_info_stop(local);
5146 rate_control_deinitialize(local);
5147 debugfs_hw_del(local);
5148
5149 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
5150 kfree(local->supp_rates[i]);
5151 kfree(local->basic_rates[i]);
5152 }
5153
5154 if (skb_queue_len(&local->skb_queue)
5155 || skb_queue_len(&local->skb_queue_unreliable))
5156 printk(KERN_WARNING "%s: skb_queue not empty\n",
5157 local->mdev->name);
5158 skb_queue_purge(&local->skb_queue);
5159 skb_queue_purge(&local->skb_queue_unreliable);
5160
5161 destroy_workqueue(local->hw.workqueue);
5162 wiphy_unregister(local->hw.wiphy);
5163 ieee80211_wep_free(local);
5164 ieee80211_led_exit(local);
5165 }
5166 EXPORT_SYMBOL(ieee80211_unregister_hw);
5167
5168 void ieee80211_free_hw(struct ieee80211_hw *hw)
5169 {
5170 struct ieee80211_local *local = hw_to_local(hw);
5171
5172 ieee80211_if_free(local->mdev);
5173 wiphy_free(local->hw.wiphy);
5174 }
5175 EXPORT_SYMBOL(ieee80211_free_hw);
5176
5177 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
5178 {
5179 struct ieee80211_local *local = hw_to_local(hw);
5180
5181 if (test_and_clear_bit(IEEE80211_LINK_STATE_XOFF,
5182 &local->state[queue])) {
5183 if (test_bit(IEEE80211_LINK_STATE_PENDING,
5184 &local->state[queue]))
5185 tasklet_schedule(&local->tx_pending_tasklet);
5186 else
5187 if (!ieee80211_qdisc_installed(local->mdev)) {
5188 if (queue == 0)
5189 netif_wake_queue(local->mdev);
5190 } else
5191 __netif_schedule(local->mdev);
5192 }
5193 }
5194 EXPORT_SYMBOL(ieee80211_wake_queue);
5195
5196 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
5197 {
5198 struct ieee80211_local *local = hw_to_local(hw);
5199
5200 if (!ieee80211_qdisc_installed(local->mdev) && queue == 0)
5201 netif_stop_queue(local->mdev);
5202 set_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]);
5203 }
5204 EXPORT_SYMBOL(ieee80211_stop_queue);
5205
5206 void ieee80211_start_queues(struct ieee80211_hw *hw)
5207 {
5208 struct ieee80211_local *local = hw_to_local(hw);
5209 int i;
5210
5211 for (i = 0; i < local->hw.queues; i++)
5212 clear_bit(IEEE80211_LINK_STATE_XOFF, &local->state[i]);
5213 if (!ieee80211_qdisc_installed(local->mdev))
5214 netif_start_queue(local->mdev);
5215 }
5216 EXPORT_SYMBOL(ieee80211_start_queues);
5217
5218 void ieee80211_stop_queues(struct ieee80211_hw *hw)
5219 {
5220 int i;
5221
5222 for (i = 0; i < hw->queues; i++)
5223 ieee80211_stop_queue(hw, i);
5224 }
5225 EXPORT_SYMBOL(ieee80211_stop_queues);
5226
5227 void ieee80211_wake_queues(struct ieee80211_hw *hw)
5228 {
5229 int i;
5230
5231 for (i = 0; i < hw->queues; i++)
5232 ieee80211_wake_queue(hw, i);
5233 }
5234 EXPORT_SYMBOL(ieee80211_wake_queues);
5235
5236 struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
5237 {
5238 struct ieee80211_sub_if_data *sdata;
5239 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5240 return &sdata->stats;
5241 }
5242
5243 static int __init ieee80211_init(void)
5244 {
5245 struct sk_buff *skb;
5246 int ret;
5247
5248 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
5249
5250 ret = ieee80211_wme_register();
5251 if (ret) {
5252 printk(KERN_DEBUG "ieee80211_init: failed to "
5253 "initialize WME (err=%d)\n", ret);
5254 return ret;
5255 }
5256
5257 ieee80211_debugfs_netdev_init();
5258 ieee80211_regdomain_init();
5259
5260 return 0;
5261 }
5262
5263
5264 static void __exit ieee80211_exit(void)
5265 {
5266 ieee80211_wme_unregister();
5267 ieee80211_debugfs_netdev_exit();
5268 }
5269
5270
5271 subsys_initcall(ieee80211_init);
5272 module_exit(ieee80211_exit);
5273
5274 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
5275 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree