2 * Original code based Host AP (software wireless LAN access point) driver
3 * for Intersil Prism2/2.5/3 - hostap.o module, common routines
5 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
7 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
8 * Copyright (c) 2004-2005, Intel Corporation
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation. See README and COPYING for
16 #include <linux/compiler.h>
17 #include <linux/config.h>
18 #include <linux/errno.h>
19 #include <linux/if_arp.h>
20 #include <linux/in6.h>
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/netdevice.h>
26 #include <linux/proc_fs.h>
27 #include <linux/skbuff.h>
28 #include <linux/slab.h>
29 #include <linux/tcp.h>
30 #include <linux/types.h>
31 #include <linux/wireless.h>
32 #include <linux/etherdevice.h>
33 #include <asm/uaccess.h>
34 #include <linux/ctype.h>
36 #include <net/ieee80211.h>
38 static void ieee80211_monitor_rx(struct ieee80211_device
*ieee
,
40 struct ieee80211_rx_stats
*rx_stats
)
42 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
43 u16 fc
= le16_to_cpu(hdr
->frame_ctl
);
46 skb
->mac
.raw
= skb
->data
;
47 skb_pull(skb
, ieee80211_get_hdrlen(fc
));
48 skb
->pkt_type
= PACKET_OTHERHOST
;
49 skb
->protocol
= __constant_htons(ETH_P_80211_RAW
);
50 memset(skb
->cb
, 0, sizeof(skb
->cb
));
54 /* Called only as a tasklet (software IRQ) */
55 static struct ieee80211_frag_entry
*ieee80211_frag_cache_find(struct
63 struct ieee80211_frag_entry
*entry
;
66 for (i
= 0; i
< IEEE80211_FRAG_CACHE_LEN
; i
++) {
67 entry
= &ieee
->frag_cache
[i
];
68 if (entry
->skb
!= NULL
&&
69 time_after(jiffies
, entry
->first_frag_time
+ 2 * HZ
)) {
70 IEEE80211_DEBUG_FRAG("expiring fragment cache entry "
71 "seq=%u last_frag=%u\n",
72 entry
->seq
, entry
->last_frag
);
73 dev_kfree_skb_any(entry
->skb
);
77 if (entry
->skb
!= NULL
&& entry
->seq
== seq
&&
78 (entry
->last_frag
+ 1 == frag
|| frag
== -1) &&
79 !compare_ether_addr(entry
->src_addr
, src
) &&
80 !compare_ether_addr(entry
->dst_addr
, dst
))
87 /* Called only as a tasklet (software IRQ) */
88 static struct sk_buff
*ieee80211_frag_cache_get(struct ieee80211_device
*ieee
,
89 struct ieee80211_hdr_4addr
*hdr
)
91 struct sk_buff
*skb
= NULL
;
93 unsigned int frag
, seq
;
94 struct ieee80211_frag_entry
*entry
;
96 sc
= le16_to_cpu(hdr
->seq_ctl
);
97 frag
= WLAN_GET_SEQ_FRAG(sc
);
98 seq
= WLAN_GET_SEQ_SEQ(sc
);
101 /* Reserve enough space to fit maximum frame length */
102 skb
= dev_alloc_skb(ieee
->dev
->mtu
+
103 sizeof(struct ieee80211_hdr_4addr
) +
106 8 /* WEP */ + ETH_ALEN
/* WDS */ );
110 entry
= &ieee
->frag_cache
[ieee
->frag_next_idx
];
111 ieee
->frag_next_idx
++;
112 if (ieee
->frag_next_idx
>= IEEE80211_FRAG_CACHE_LEN
)
113 ieee
->frag_next_idx
= 0;
115 if (entry
->skb
!= NULL
)
116 dev_kfree_skb_any(entry
->skb
);
118 entry
->first_frag_time
= jiffies
;
120 entry
->last_frag
= frag
;
122 memcpy(entry
->src_addr
, hdr
->addr2
, ETH_ALEN
);
123 memcpy(entry
->dst_addr
, hdr
->addr1
, ETH_ALEN
);
125 /* received a fragment of a frame for which the head fragment
126 * should have already been received */
127 entry
= ieee80211_frag_cache_find(ieee
, seq
, frag
, hdr
->addr2
,
130 entry
->last_frag
= frag
;
138 /* Called only as a tasklet (software IRQ) */
139 static int ieee80211_frag_cache_invalidate(struct ieee80211_device
*ieee
,
140 struct ieee80211_hdr_4addr
*hdr
)
144 struct ieee80211_frag_entry
*entry
;
146 sc
= le16_to_cpu(hdr
->seq_ctl
);
147 seq
= WLAN_GET_SEQ_SEQ(sc
);
149 entry
= ieee80211_frag_cache_find(ieee
, seq
, -1, hdr
->addr2
,
153 IEEE80211_DEBUG_FRAG("could not invalidate fragment cache "
154 "entry (seq=%u)\n", seq
);
163 /* ieee80211_rx_frame_mgtmt
165 * Responsible for handling management control frames
167 * Called by ieee80211_rx */
169 ieee80211_rx_frame_mgmt(struct ieee80211_device
*ieee
, struct sk_buff
*skb
,
170 struct ieee80211_rx_stats
*rx_stats
, u16 type
,
173 if (ieee
->iw_mode
== IW_MODE_MASTER
) {
174 printk(KERN_DEBUG
"%s: Master mode not yet suppported.\n",
178 hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
182 if (ieee
->hostapd
&& type
== WLAN_FC_TYPE_MGMT
) {
183 if (stype
== WLAN_FC_STYPE_BEACON
&&
184 ieee
->iw_mode
== IW_MODE_MASTER
) {
185 struct sk_buff
*skb2
;
186 /* Process beacon frames also in kernel driver to
187 * update STA(AP) table statistics */
188 skb2
= skb_clone(skb
, GFP_ATOMIC
);
190 hostap_rx(skb2
->dev
, skb2
, rx_stats
);
193 /* send management frames to the user space daemon for
195 ieee
->apdevstats
.rx_packets
++;
196 ieee
->apdevstats
.rx_bytes
+= skb
->len
;
197 prism2_rx_80211(ieee
->apdev
, skb
, rx_stats
, PRISM2_RX_MGMT
);
201 if (ieee
->iw_mode
== IW_MODE_MASTER
) {
202 if (type
!= WLAN_FC_TYPE_MGMT
&& type
!= WLAN_FC_TYPE_CTRL
) {
203 printk(KERN_DEBUG
"%s: unknown management frame "
204 "(type=0x%02x, stype=0x%02x) dropped\n",
205 skb
->dev
->name
, type
, stype
);
209 hostap_rx(skb
->dev
, skb
, rx_stats
);
213 printk(KERN_DEBUG
"%s: hostap_rx_frame_mgmt: management frame "
214 "received in non-Host AP mode\n", skb
->dev
->name
);
219 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
220 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
221 static unsigned char rfc1042_header
[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
223 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
224 static unsigned char bridge_tunnel_header
[] =
225 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
226 /* No encapsulation header if EtherType < 0x600 (=length) */
228 /* Called by ieee80211_rx_frame_decrypt */
229 static int ieee80211_is_eapol_frame(struct ieee80211_device
*ieee
,
232 struct net_device
*dev
= ieee
->dev
;
234 struct ieee80211_hdr_3addr
*hdr
;
240 hdr
= (struct ieee80211_hdr_3addr
*)skb
->data
;
241 fc
= le16_to_cpu(hdr
->frame_ctl
);
243 /* check that the frame is unicast frame to us */
244 if ((fc
& (IEEE80211_FCTL_TODS
| IEEE80211_FCTL_FROMDS
)) ==
245 IEEE80211_FCTL_TODS
&&
246 !compare_ether_addr(hdr
->addr1
, dev
->dev_addr
) &&
247 !compare_ether_addr(hdr
->addr3
, dev
->dev_addr
)) {
248 /* ToDS frame with own addr BSSID and DA */
249 } else if ((fc
& (IEEE80211_FCTL_TODS
| IEEE80211_FCTL_FROMDS
)) ==
250 IEEE80211_FCTL_FROMDS
&&
251 !compare_ether_addr(hdr
->addr1
, dev
->dev_addr
)) {
252 /* FromDS frame with own addr as DA */
256 if (skb
->len
< 24 + 8)
259 /* check for port access entity Ethernet type */
260 pos
= skb
->data
+ 24;
261 ethertype
= (pos
[6] << 8) | pos
[7];
262 if (ethertype
== ETH_P_PAE
)
268 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
270 ieee80211_rx_frame_decrypt(struct ieee80211_device
*ieee
, struct sk_buff
*skb
,
271 struct ieee80211_crypt_data
*crypt
)
273 struct ieee80211_hdr_3addr
*hdr
;
276 if (crypt
== NULL
|| crypt
->ops
->decrypt_mpdu
== NULL
)
279 hdr
= (struct ieee80211_hdr_3addr
*)skb
->data
;
280 hdrlen
= ieee80211_get_hdrlen(le16_to_cpu(hdr
->frame_ctl
));
282 atomic_inc(&crypt
->refcnt
);
283 res
= crypt
->ops
->decrypt_mpdu(skb
, hdrlen
, crypt
->priv
);
284 atomic_dec(&crypt
->refcnt
);
286 IEEE80211_DEBUG_DROP("decryption failed (SA=" MAC_FMT
287 ") res=%d\n", MAC_ARG(hdr
->addr2
), res
);
289 IEEE80211_DEBUG_DROP("Decryption failed ICV "
290 "mismatch (key %d)\n",
291 skb
->data
[hdrlen
+ 3] >> 6);
292 ieee
->ieee_stats
.rx_discards_undecryptable
++;
299 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
301 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device
*ieee
,
302 struct sk_buff
*skb
, int keyidx
,
303 struct ieee80211_crypt_data
*crypt
)
305 struct ieee80211_hdr_3addr
*hdr
;
308 if (crypt
== NULL
|| crypt
->ops
->decrypt_msdu
== NULL
)
311 hdr
= (struct ieee80211_hdr_3addr
*)skb
->data
;
312 hdrlen
= ieee80211_get_hdrlen(le16_to_cpu(hdr
->frame_ctl
));
314 atomic_inc(&crypt
->refcnt
);
315 res
= crypt
->ops
->decrypt_msdu(skb
, keyidx
, hdrlen
, crypt
->priv
);
316 atomic_dec(&crypt
->refcnt
);
318 printk(KERN_DEBUG
"%s: MSDU decryption/MIC verification failed"
319 " (SA=" MAC_FMT
" keyidx=%d)\n",
320 ieee
->dev
->name
, MAC_ARG(hdr
->addr2
), keyidx
);
327 /* All received frames are sent to this function. @skb contains the frame in
328 * IEEE 802.11 format, i.e., in the format it was sent over air.
329 * This function is called only as a tasklet (software IRQ). */
330 int ieee80211_rx(struct ieee80211_device
*ieee
, struct sk_buff
*skb
,
331 struct ieee80211_rx_stats
*rx_stats
)
333 struct net_device
*dev
= ieee
->dev
;
334 struct ieee80211_hdr_4addr
*hdr
;
336 u16 fc
, type
, stype
, sc
;
337 struct net_device_stats
*stats
;
342 struct net_device
*wds
= NULL
;
343 struct sk_buff
*skb2
= NULL
;
344 struct net_device
*wds
= NULL
;
345 int frame_authorized
= 0;
346 int from_assoc_ap
= 0;
351 struct ieee80211_crypt_data
*crypt
= NULL
;
353 int can_be_decrypted
= 0;
355 hdr
= (struct ieee80211_hdr_4addr
*)skb
->data
;
356 stats
= &ieee
->stats
;
359 printk(KERN_INFO
"%s: SKB length < 10\n", dev
->name
);
363 fc
= le16_to_cpu(hdr
->frame_ctl
);
364 type
= WLAN_FC_GET_TYPE(fc
);
365 stype
= WLAN_FC_GET_STYPE(fc
);
366 sc
= le16_to_cpu(hdr
->seq_ctl
);
367 frag
= WLAN_GET_SEQ_FRAG(sc
);
368 hdrlen
= ieee80211_get_hdrlen(fc
);
370 /* Put this code here so that we avoid duplicating it in all
371 * Rx paths. - Jean II */
372 #ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */
373 #ifdef CONFIG_NET_RADIO
374 /* If spy monitoring on */
375 if (ieee
->spy_data
.spy_number
> 0) {
376 struct iw_quality wstats
;
379 if (rx_stats
->mask
& IEEE80211_STATMASK_RSSI
) {
380 wstats
.level
= rx_stats
->rssi
;
381 wstats
.updated
|= IW_QUAL_LEVEL_UPDATED
;
383 wstats
.updated
|= IW_QUAL_LEVEL_INVALID
;
385 if (rx_stats
->mask
& IEEE80211_STATMASK_NOISE
) {
386 wstats
.noise
= rx_stats
->noise
;
387 wstats
.updated
|= IW_QUAL_NOISE_UPDATED
;
389 wstats
.updated
|= IW_QUAL_NOISE_INVALID
;
391 if (rx_stats
->mask
& IEEE80211_STATMASK_SIGNAL
) {
392 wstats
.qual
= rx_stats
->signal
;
393 wstats
.updated
|= IW_QUAL_QUAL_UPDATED
;
395 wstats
.updated
|= IW_QUAL_QUAL_INVALID
;
397 /* Update spy records */
398 wireless_spy_update(ieee
->dev
, hdr
->addr2
, &wstats
);
400 #endif /* CONFIG_NET_RADIO */
401 #endif /* IW_WIRELESS_SPY */
404 hostap_update_rx_stats(local
->ap
, hdr
, rx_stats
);
407 if (ieee
->iw_mode
== IW_MODE_MONITOR
) {
408 ieee80211_monitor_rx(ieee
, skb
, rx_stats
);
410 stats
->rx_bytes
+= skb
->len
;
414 can_be_decrypted
= (is_multicast_ether_addr(hdr
->addr1
) ||
415 is_broadcast_ether_addr(hdr
->addr2
)) ?
416 ieee
->host_mc_decrypt
: ieee
->host_decrypt
;
418 if (can_be_decrypted
) {
420 if (skb
->len
>= hdrlen
+ 3) {
421 /* Top two-bits of byte 3 are the key index */
422 idx
= skb
->data
[hdrlen
+ 3] >> 6;
425 /* ieee->crypt[] is WEP_KEY (4) in length. Given that idx
426 * is only allowed 2-bits of storage, no value of idx can
427 * be provided via above code that would result in idx
428 * being out of range */
429 crypt
= ieee
->crypt
[idx
];
434 /* Use station specific key to override default keys if the
435 * receiver address is a unicast address ("individual RA"). If
436 * bcrx_sta_key parameter is set, station specific key is used
437 * even with broad/multicast targets (this is against IEEE
438 * 802.11, but makes it easier to use different keys with
439 * stations that do not support WEP key mapping). */
441 if (!(hdr
->addr1
[0] & 0x01) || local
->bcrx_sta_key
)
442 (void)hostap_handle_sta_crypto(local
, hdr
, &crypt
,
446 /* allow NULL decrypt to indicate an station specific override
447 * for default encryption */
448 if (crypt
&& (crypt
->ops
== NULL
||
449 crypt
->ops
->decrypt_mpdu
== NULL
))
452 if (!crypt
&& (fc
& IEEE80211_FCTL_PROTECTED
)) {
453 /* This seems to be triggered by some (multicast?)
454 * frames from other than current BSS, so just drop the
455 * frames silently instead of filling system log with
457 IEEE80211_DEBUG_DROP("Decryption failed (not set)"
458 " (SA=" MAC_FMT
")\n",
459 MAC_ARG(hdr
->addr2
));
460 ieee
->ieee_stats
.rx_discards_undecryptable
++;
465 if (type
!= WLAN_FC_TYPE_DATA
) {
466 if (type
== WLAN_FC_TYPE_MGMT
&& stype
== WLAN_FC_STYPE_AUTH
&&
467 fc
& IEEE80211_FCTL_PROTECTED
&& ieee
->host_decrypt
&&
468 (keyidx
= hostap_rx_frame_decrypt(ieee
, skb
, crypt
)) < 0) {
469 printk(KERN_DEBUG
"%s: failed to decrypt mgmt::auth "
470 "from " MAC_FMT
"\n", dev
->name
,
471 MAC_ARG(hdr
->addr2
));
472 /* TODO: could inform hostapd about this so that it
473 * could send auth failure report */
477 if (ieee80211_rx_frame_mgmt(ieee
, skb
, rx_stats
, type
, stype
))
484 /* Data frame - extract src/dst addresses */
485 if (skb
->len
< IEEE80211_3ADDR_LEN
)
488 switch (fc
& (IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
)) {
489 case IEEE80211_FCTL_FROMDS
:
490 memcpy(dst
, hdr
->addr1
, ETH_ALEN
);
491 memcpy(src
, hdr
->addr3
, ETH_ALEN
);
493 case IEEE80211_FCTL_TODS
:
494 memcpy(dst
, hdr
->addr3
, ETH_ALEN
);
495 memcpy(src
, hdr
->addr2
, ETH_ALEN
);
497 case IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
:
498 if (skb
->len
< IEEE80211_4ADDR_LEN
)
500 memcpy(dst
, hdr
->addr3
, ETH_ALEN
);
501 memcpy(src
, hdr
->addr4
, ETH_ALEN
);
504 memcpy(dst
, hdr
->addr1
, ETH_ALEN
);
505 memcpy(src
, hdr
->addr2
, ETH_ALEN
);
510 if (hostap_rx_frame_wds(ieee
, hdr
, fc
, &wds
))
513 skb
->dev
= dev
= wds
;
514 stats
= hostap_get_stats(dev
);
517 if (ieee
->iw_mode
== IW_MODE_MASTER
&& !wds
&&
518 (fc
& (IEEE80211_FCTL_TODS
| IEEE80211_FCTL_FROMDS
)) ==
519 IEEE80211_FCTL_FROMDS
&& ieee
->stadev
520 && !compare_ether_addr(hdr
->addr2
, ieee
->assoc_ap_addr
)) {
521 /* Frame from BSSID of the AP for which we are a client */
522 skb
->dev
= dev
= ieee
->stadev
;
523 stats
= hostap_get_stats(dev
);
528 dev
->last_rx
= jiffies
;
531 if ((ieee
->iw_mode
== IW_MODE_MASTER
||
532 ieee
->iw_mode
== IW_MODE_REPEAT
) && !from_assoc_ap
) {
533 switch (hostap_handle_sta_rx(ieee
, dev
, skb
, rx_stats
,
535 case AP_RX_CONTINUE_NOT_AUTHORIZED
:
536 frame_authorized
= 0;
539 frame_authorized
= 1;
549 /* Nullfunc frames may have PS-bit set, so they must be passed to
550 * hostap_handle_sta_rx() before being dropped here. */
552 stype
&= ~IEEE80211_STYPE_QOS_DATA
;
554 if (stype
!= IEEE80211_STYPE_DATA
&&
555 stype
!= IEEE80211_STYPE_DATA_CFACK
&&
556 stype
!= IEEE80211_STYPE_DATA_CFPOLL
&&
557 stype
!= IEEE80211_STYPE_DATA_CFACKPOLL
) {
558 if (stype
!= IEEE80211_STYPE_NULLFUNC
)
559 IEEE80211_DEBUG_DROP("RX: dropped data frame "
560 "with no data (type=0x%02x, "
561 "subtype=0x%02x, len=%d)\n",
562 type
, stype
, skb
->len
);
566 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
568 if ((fc
& IEEE80211_FCTL_PROTECTED
) && can_be_decrypted
&&
569 (keyidx
= ieee80211_rx_frame_decrypt(ieee
, skb
, crypt
)) < 0)
572 hdr
= (struct ieee80211_hdr_4addr
*)skb
->data
;
574 /* skb: hdr + (possibly fragmented) plaintext payload */
575 // PR: FIXME: hostap has additional conditions in the "if" below:
576 // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
577 if ((frag
!= 0 || (fc
& IEEE80211_FCTL_MOREFRAGS
))) {
579 struct sk_buff
*frag_skb
= ieee80211_frag_cache_get(ieee
, hdr
);
580 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag
);
583 IEEE80211_DEBUG(IEEE80211_DL_RX
| IEEE80211_DL_FRAG
,
584 "Rx cannot get skb from fragment "
585 "cache (morefrag=%d seq=%u frag=%u)\n",
586 (fc
& IEEE80211_FCTL_MOREFRAGS
) != 0,
587 WLAN_GET_SEQ_SEQ(sc
), frag
);
595 if (frag_skb
->tail
+ flen
> frag_skb
->end
) {
596 printk(KERN_WARNING
"%s: host decrypted and "
597 "reassembled frame did not fit skb\n",
599 ieee80211_frag_cache_invalidate(ieee
, hdr
);
604 /* copy first fragment (including full headers) into
605 * beginning of the fragment cache skb */
606 memcpy(skb_put(frag_skb
, flen
), skb
->data
, flen
);
608 /* append frame payload to the end of the fragment
610 memcpy(skb_put(frag_skb
, flen
), skb
->data
+ hdrlen
,
613 dev_kfree_skb_any(skb
);
616 if (fc
& IEEE80211_FCTL_MOREFRAGS
) {
617 /* more fragments expected - leave the skb in fragment
618 * cache for now; it will be delivered to upper layers
619 * after all fragments have been received */
623 /* this was the last fragment and the frame will be
624 * delivered, so remove skb from fragment cache */
626 hdr
= (struct ieee80211_hdr_4addr
*)skb
->data
;
627 ieee80211_frag_cache_invalidate(ieee
, hdr
);
630 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
631 * encrypted/authenticated */
632 if ((fc
& IEEE80211_FCTL_PROTECTED
) && can_be_decrypted
&&
633 ieee80211_rx_frame_decrypt_msdu(ieee
, skb
, keyidx
, crypt
))
636 hdr
= (struct ieee80211_hdr_4addr
*)skb
->data
;
637 if (crypt
&& !(fc
& IEEE80211_FCTL_PROTECTED
) && !ieee
->open_wep
) {
638 if ( /*ieee->ieee802_1x && */
639 ieee80211_is_eapol_frame(ieee
, skb
)) {
640 /* pass unencrypted EAPOL frames even if encryption is
643 IEEE80211_DEBUG_DROP("encryption configured, but RX "
644 "frame not encrypted (SA=" MAC_FMT
645 ")\n", MAC_ARG(hdr
->addr2
));
650 if (crypt
&& !(fc
& IEEE80211_FCTL_PROTECTED
) && !ieee
->open_wep
&&
651 !ieee80211_is_eapol_frame(ieee
, skb
)) {
652 IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
653 "frame from " MAC_FMT
654 " (drop_unencrypted=1)\n",
655 MAC_ARG(hdr
->addr2
));
659 /* skb: hdr + (possible reassembled) full plaintext payload */
661 payload
= skb
->data
+ hdrlen
;
662 ethertype
= (payload
[6] << 8) | payload
[7];
665 /* If IEEE 802.1X is used, check whether the port is authorized to send
666 * the received frame. */
667 if (ieee
->ieee802_1x
&& ieee
->iw_mode
== IW_MODE_MASTER
) {
668 if (ethertype
== ETH_P_PAE
) {
669 printk(KERN_DEBUG
"%s: RX: IEEE 802.1X frame\n",
671 if (ieee
->hostapd
&& ieee
->apdev
) {
672 /* Send IEEE 802.1X frames to the user
673 * space daemon for processing */
674 prism2_rx_80211(ieee
->apdev
, skb
, rx_stats
,
676 ieee
->apdevstats
.rx_packets
++;
677 ieee
->apdevstats
.rx_bytes
+= skb
->len
;
680 } else if (!frame_authorized
) {
681 printk(KERN_DEBUG
"%s: dropped frame from "
682 "unauthorized port (IEEE 802.1X): "
683 "ethertype=0x%04x\n", dev
->name
, ethertype
);
689 /* convert hdr + possible LLC headers into Ethernet header */
690 if (skb
->len
- hdrlen
>= 8 &&
691 ((memcmp(payload
, rfc1042_header
, SNAP_SIZE
) == 0 &&
692 ethertype
!= ETH_P_AARP
&& ethertype
!= ETH_P_IPX
) ||
693 memcmp(payload
, bridge_tunnel_header
, SNAP_SIZE
) == 0)) {
694 /* remove RFC1042 or Bridge-Tunnel encapsulation and
695 * replace EtherType */
696 skb_pull(skb
, hdrlen
+ SNAP_SIZE
);
697 memcpy(skb_push(skb
, ETH_ALEN
), src
, ETH_ALEN
);
698 memcpy(skb_push(skb
, ETH_ALEN
), dst
, ETH_ALEN
);
701 /* Leave Ethernet header part of hdr and full payload */
702 skb_pull(skb
, hdrlen
);
703 len
= htons(skb
->len
);
704 memcpy(skb_push(skb
, 2), &len
, 2);
705 memcpy(skb_push(skb
, ETH_ALEN
), src
, ETH_ALEN
);
706 memcpy(skb_push(skb
, ETH_ALEN
), dst
, ETH_ALEN
);
710 if (wds
&& ((fc
& (IEEE80211_FCTL_TODS
| IEEE80211_FCTL_FROMDS
)) ==
711 IEEE80211_FCTL_TODS
) && skb
->len
>= ETH_HLEN
+ ETH_ALEN
) {
712 /* Non-standard frame: get addr4 from its bogus location after
714 memcpy(skb
->data
+ ETH_ALEN
,
715 skb
->data
+ skb
->len
- ETH_ALEN
, ETH_ALEN
);
716 skb_trim(skb
, skb
->len
- ETH_ALEN
);
721 stats
->rx_bytes
+= skb
->len
;
724 if (ieee
->iw_mode
== IW_MODE_MASTER
&& !wds
&& ieee
->ap
->bridge_packets
) {
726 /* copy multicast frame both to the higher layers and
727 * to the wireless media */
728 ieee
->ap
->bridged_multicast
++;
729 skb2
= skb_clone(skb
, GFP_ATOMIC
);
731 printk(KERN_DEBUG
"%s: skb_clone failed for "
732 "multicast frame\n", dev
->name
);
733 } else if (hostap_is_sta_assoc(ieee
->ap
, dst
)) {
734 /* send frame directly to the associated STA using
735 * wireless media and not passing to higher layers */
736 ieee
->ap
->bridged_unicast
++;
743 /* send to wireless media */
744 skb2
->protocol
= __constant_htons(ETH_P_802_3
);
745 skb2
->mac
.raw
= skb2
->nh
.raw
= skb2
->data
;
746 /* skb2->nh.raw = skb2->data + ETH_HLEN; */
748 dev_queue_xmit(skb2
);
753 skb
->protocol
= eth_type_trans(skb
, dev
);
754 memset(skb
->cb
, 0, sizeof(skb
->cb
));
756 skb
->ip_summed
= CHECKSUM_NONE
; /* 802.11 crc not sufficient */
763 hostap_handle_sta_release(sta
);
770 /* Returning 0 indicates to caller that we have not handled the SKB--
771 * so it is still allocated and can be used again by underlying
772 * hardware as a DMA target */
776 #define MGMT_FRAME_FIXED_PART_LENGTH 0x24
778 static u8 qos_oui
[QOS_OUI_LEN
] = { 0x00, 0x50, 0xF2 };
781 * Make ther structure we read from the beacon packet has
784 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
785 *info_element
, int sub_type
)
788 if (info_element
->qui_subtype
!= sub_type
)
790 if (memcmp(info_element
->qui
, qos_oui
, QOS_OUI_LEN
))
792 if (info_element
->qui_type
!= QOS_OUI_TYPE
)
794 if (info_element
->version
!= QOS_VERSION_1
)
801 * Parse a QoS parameter element
803 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
804 *element_param
, struct ieee80211_info_element
808 u16 size
= sizeof(struct ieee80211_qos_parameter_info
) - 2;
810 if ((info_element
== NULL
) || (element_param
== NULL
))
813 if (info_element
->id
== QOS_ELEMENT_ID
&& info_element
->len
== size
) {
814 memcpy(element_param
->info_element
.qui
, info_element
->data
,
816 element_param
->info_element
.elementID
= info_element
->id
;
817 element_param
->info_element
.length
= info_element
->len
;
821 ret
= ieee80211_verify_qos_info(&element_param
->info_element
,
822 QOS_OUI_PARAM_SUB_TYPE
);
827 * Parse a QoS information element
829 static int ieee80211_read_qos_info_element(struct
830 ieee80211_qos_information_element
831 *element_info
, struct ieee80211_info_element
835 u16 size
= sizeof(struct ieee80211_qos_information_element
) - 2;
837 if (element_info
== NULL
)
839 if (info_element
== NULL
)
842 if ((info_element
->id
== QOS_ELEMENT_ID
) && (info_element
->len
== size
)) {
843 memcpy(element_info
->qui
, info_element
->data
,
845 element_info
->elementID
= info_element
->id
;
846 element_info
->length
= info_element
->len
;
851 ret
= ieee80211_verify_qos_info(element_info
,
852 QOS_OUI_INFO_SUB_TYPE
);
857 * Write QoS parameters from the ac parameters.
859 static int ieee80211_qos_convert_ac_to_parameters(struct
860 ieee80211_qos_parameter_info
862 ieee80211_qos_parameters
867 struct ieee80211_qos_ac_parameter
*ac_params
;
872 for (i
= 0; i
< QOS_QUEUE_NUM
; i
++) {
873 ac_params
= &(param_elm
->ac_params_record
[i
]);
875 qos_param
->aifs
[i
] = (ac_params
->aci_aifsn
) & 0x0F;
876 qos_param
->aifs
[i
] -= (qos_param
->aifs
[i
] < 2) ? 0 : 2;
878 cw_min
= ac_params
->ecw_min_max
& 0x0F;
879 qos_param
->cw_min
[i
] = (u16
) ((1 << cw_min
) - 1);
881 cw_max
= (ac_params
->ecw_min_max
& 0xF0) >> 4;
882 qos_param
->cw_max
[i
] = (u16
) ((1 << cw_max
) - 1);
885 (ac_params
->aci_aifsn
& 0x10) ? 0x01 : 0x00;
887 txop
= le16_to_cpu(ac_params
->tx_op_limit
) * 32;
888 qos_param
->tx_op_limit
[i
] = (u16
) txop
;
894 * we have a generic data element which it may contain QoS information or
895 * parameters element. check the information element length to decide
898 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
900 struct ieee80211_network
*network
)
903 struct ieee80211_qos_parameters
*qos_param
= NULL
;
904 struct ieee80211_qos_information_element qos_info_element
;
906 rc
= ieee80211_read_qos_info_element(&qos_info_element
, info_element
);
909 network
->qos_data
.param_count
= qos_info_element
.ac_info
& 0x0F;
910 network
->flags
|= NETWORK_HAS_QOS_INFORMATION
;
912 struct ieee80211_qos_parameter_info param_element
;
914 rc
= ieee80211_read_qos_param_element(¶m_element
,
917 qos_param
= &(network
->qos_data
.parameters
);
918 ieee80211_qos_convert_ac_to_parameters(¶m_element
,
920 network
->flags
|= NETWORK_HAS_QOS_PARAMETERS
;
921 network
->qos_data
.param_count
=
922 param_element
.info_element
.ac_info
& 0x0F;
927 IEEE80211_DEBUG_QOS("QoS is supported\n");
928 network
->qos_data
.supported
= 1;
933 static int ieee80211_parse_info_param(struct ieee80211_info_element
934 *info_element
, u16 length
,
935 struct ieee80211_network
*network
)
938 #ifdef CONFIG_IEEE80211_DEBUG
943 while (length
>= sizeof(*info_element
)) {
944 if (sizeof(*info_element
) + info_element
->len
> length
) {
945 IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
946 "info_element->len + 2 > left : "
947 "info_element->len+2=%zd left=%d, id=%d.\n",
949 sizeof(*info_element
),
950 length
, info_element
->id
);
954 switch (info_element
->id
) {
956 if (ieee80211_is_empty_essid(info_element
->data
,
957 info_element
->len
)) {
958 network
->flags
|= NETWORK_EMPTY_ESSID
;
962 network
->ssid_len
= min(info_element
->len
,
963 (u8
) IW_ESSID_MAX_SIZE
);
964 memcpy(network
->ssid
, info_element
->data
,
966 if (network
->ssid_len
< IW_ESSID_MAX_SIZE
)
967 memset(network
->ssid
+ network
->ssid_len
, 0,
968 IW_ESSID_MAX_SIZE
- network
->ssid_len
);
970 IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
971 network
->ssid
, network
->ssid_len
);
974 case MFIE_TYPE_RATES
:
975 #ifdef CONFIG_IEEE80211_DEBUG
978 network
->rates_len
= min(info_element
->len
,
980 for (i
= 0; i
< network
->rates_len
; i
++) {
981 network
->rates
[i
] = info_element
->data
[i
];
982 #ifdef CONFIG_IEEE80211_DEBUG
983 p
+= snprintf(p
, sizeof(rates_str
) -
984 (p
- rates_str
), "%02X ",
987 if (ieee80211_is_ofdm_rate
988 (info_element
->data
[i
])) {
989 network
->flags
|= NETWORK_HAS_OFDM
;
990 if (info_element
->data
[i
] &
991 IEEE80211_BASIC_RATE_MASK
)
997 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
998 rates_str
, network
->rates_len
);
1001 case MFIE_TYPE_RATES_EX
:
1002 #ifdef CONFIG_IEEE80211_DEBUG
1005 network
->rates_ex_len
= min(info_element
->len
,
1006 MAX_RATES_EX_LENGTH
);
1007 for (i
= 0; i
< network
->rates_ex_len
; i
++) {
1008 network
->rates_ex
[i
] = info_element
->data
[i
];
1009 #ifdef CONFIG_IEEE80211_DEBUG
1010 p
+= snprintf(p
, sizeof(rates_str
) -
1011 (p
- rates_str
), "%02X ",
1014 if (ieee80211_is_ofdm_rate
1015 (info_element
->data
[i
])) {
1016 network
->flags
|= NETWORK_HAS_OFDM
;
1017 if (info_element
->data
[i
] &
1018 IEEE80211_BASIC_RATE_MASK
)
1024 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1025 rates_str
, network
->rates_ex_len
);
1028 case MFIE_TYPE_DS_SET
:
1029 IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1030 info_element
->data
[0]);
1031 network
->channel
= info_element
->data
[0];
1034 case MFIE_TYPE_FH_SET
:
1035 IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1038 case MFIE_TYPE_CF_SET
:
1039 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1043 IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: ignored\n");
1046 case MFIE_TYPE_ERP_INFO
:
1047 network
->erp_value
= info_element
->data
[0];
1048 IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1049 network
->erp_value
);
1052 case MFIE_TYPE_IBSS_SET
:
1053 network
->atim_window
= info_element
->data
[0];
1054 IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1055 network
->atim_window
);
1058 case MFIE_TYPE_CHALLENGE
:
1059 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1062 case MFIE_TYPE_GENERIC
:
1063 IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1065 if (!ieee80211_parse_qos_info_param_IE(info_element
,
1069 if (info_element
->len
>= 4 &&
1070 info_element
->data
[0] == 0x00 &&
1071 info_element
->data
[1] == 0x50 &&
1072 info_element
->data
[2] == 0xf2 &&
1073 info_element
->data
[3] == 0x01) {
1074 network
->wpa_ie_len
= min(info_element
->len
+ 2,
1076 memcpy(network
->wpa_ie
, info_element
,
1077 network
->wpa_ie_len
);
1082 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1084 network
->rsn_ie_len
= min(info_element
->len
+ 2,
1086 memcpy(network
->rsn_ie
, info_element
,
1087 network
->rsn_ie_len
);
1090 case MFIE_TYPE_QOS_PARAMETER
:
1092 "QoS Error need to parse QOS_PARAMETER IE\n");
1096 IEEE80211_DEBUG_MGMT("unsupported IE %d\n",
1101 length
-= sizeof(*info_element
) + info_element
->len
;
1103 (struct ieee80211_info_element
*)&info_element
->
1104 data
[info_element
->len
];
1110 static int ieee80211_handle_assoc_resp(struct ieee80211_device
*ieee
, struct ieee80211_assoc_response
1111 *frame
, struct ieee80211_rx_stats
*stats
)
1113 struct ieee80211_network network_resp
;
1114 struct ieee80211_network
*network
= &network_resp
;
1115 struct net_device
*dev
= ieee
->dev
;
1118 network
->qos_data
.active
= 0;
1119 network
->qos_data
.supported
= 0;
1120 network
->qos_data
.param_count
= 0;
1121 network
->qos_data
.old_param_count
= 0;
1123 //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1124 network
->atim_window
= le16_to_cpu(frame
->aid
);
1125 network
->listen_interval
= le16_to_cpu(frame
->status
);
1126 memcpy(network
->bssid
, frame
->header
.addr3
, ETH_ALEN
);
1127 network
->capability
= le16_to_cpu(frame
->capability
);
1128 network
->last_scanned
= jiffies
;
1129 network
->rates_len
= network
->rates_ex_len
= 0;
1130 network
->last_associate
= 0;
1131 network
->ssid_len
= 0;
1132 network
->erp_value
=
1133 (network
->capability
& WLAN_CAPABILITY_IBSS
) ? 0x3 : 0x0;
1135 if (stats
->freq
== IEEE80211_52GHZ_BAND
) {
1136 /* for A band (No DS info) */
1137 network
->channel
= stats
->received_channel
;
1139 network
->flags
|= NETWORK_HAS_CCK
;
1141 network
->wpa_ie_len
= 0;
1142 network
->rsn_ie_len
= 0;
1144 if (ieee80211_parse_info_param
1145 (frame
->info_element
, stats
->len
- sizeof(*frame
), network
))
1149 if (stats
->freq
== IEEE80211_52GHZ_BAND
)
1150 network
->mode
= IEEE_A
;
1152 if (network
->flags
& NETWORK_HAS_OFDM
)
1153 network
->mode
|= IEEE_G
;
1154 if (network
->flags
& NETWORK_HAS_CCK
)
1155 network
->mode
|= IEEE_B
;
1158 if (ieee80211_is_empty_essid(network
->ssid
, network
->ssid_len
))
1159 network
->flags
|= NETWORK_EMPTY_ESSID
;
1161 memcpy(&network
->stats
, stats
, sizeof(network
->stats
));
1163 if (ieee
->handle_assoc_response
!= NULL
)
1164 ieee
->handle_assoc_response(dev
, frame
, network
);
1169 /***************************************************/
1171 static int ieee80211_network_init(struct ieee80211_device
*ieee
, struct ieee80211_probe_response
1173 struct ieee80211_network
*network
,
1174 struct ieee80211_rx_stats
*stats
)
1176 network
->qos_data
.active
= 0;
1177 network
->qos_data
.supported
= 0;
1178 network
->qos_data
.param_count
= 0;
1179 network
->qos_data
.old_param_count
= 0;
1181 /* Pull out fixed field data */
1182 memcpy(network
->bssid
, beacon
->header
.addr3
, ETH_ALEN
);
1183 network
->capability
= le16_to_cpu(beacon
->capability
);
1184 network
->last_scanned
= jiffies
;
1185 network
->time_stamp
[0] = le32_to_cpu(beacon
->time_stamp
[0]);
1186 network
->time_stamp
[1] = le32_to_cpu(beacon
->time_stamp
[1]);
1187 network
->beacon_interval
= le16_to_cpu(beacon
->beacon_interval
);
1188 /* Where to pull this? beacon->listen_interval; */
1189 network
->listen_interval
= 0x0A;
1190 network
->rates_len
= network
->rates_ex_len
= 0;
1191 network
->last_associate
= 0;
1192 network
->ssid_len
= 0;
1194 network
->atim_window
= 0;
1195 network
->erp_value
= (network
->capability
& WLAN_CAPABILITY_IBSS
) ?
1198 if (stats
->freq
== IEEE80211_52GHZ_BAND
) {
1199 /* for A band (No DS info) */
1200 network
->channel
= stats
->received_channel
;
1202 network
->flags
|= NETWORK_HAS_CCK
;
1204 network
->wpa_ie_len
= 0;
1205 network
->rsn_ie_len
= 0;
1207 if (ieee80211_parse_info_param
1208 (beacon
->info_element
, stats
->len
- sizeof(*beacon
), network
))
1212 if (stats
->freq
== IEEE80211_52GHZ_BAND
)
1213 network
->mode
= IEEE_A
;
1215 if (network
->flags
& NETWORK_HAS_OFDM
)
1216 network
->mode
|= IEEE_G
;
1217 if (network
->flags
& NETWORK_HAS_CCK
)
1218 network
->mode
|= IEEE_B
;
1221 if (network
->mode
== 0) {
1222 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT
")' "
1224 escape_essid(network
->ssid
,
1226 MAC_ARG(network
->bssid
));
1230 if (ieee80211_is_empty_essid(network
->ssid
, network
->ssid_len
))
1231 network
->flags
|= NETWORK_EMPTY_ESSID
;
1233 memcpy(&network
->stats
, stats
, sizeof(network
->stats
));
1238 static inline int is_same_network(struct ieee80211_network
*src
,
1239 struct ieee80211_network
*dst
)
1241 /* A network is only a duplicate if the channel, BSSID, and ESSID
1242 * all match. We treat all <hidden> with the same BSSID and channel
1244 return ((src
->ssid_len
== dst
->ssid_len
) &&
1245 (src
->channel
== dst
->channel
) &&
1246 !compare_ether_addr(src
->bssid
, dst
->bssid
) &&
1247 !memcmp(src
->ssid
, dst
->ssid
, src
->ssid_len
));
1250 static void update_network(struct ieee80211_network
*dst
,
1251 struct ieee80211_network
*src
)
1256 memcpy(&dst
->stats
, &src
->stats
, sizeof(struct ieee80211_rx_stats
));
1257 dst
->capability
= src
->capability
;
1258 memcpy(dst
->rates
, src
->rates
, src
->rates_len
);
1259 dst
->rates_len
= src
->rates_len
;
1260 memcpy(dst
->rates_ex
, src
->rates_ex
, src
->rates_ex_len
);
1261 dst
->rates_ex_len
= src
->rates_ex_len
;
1263 dst
->mode
= src
->mode
;
1264 dst
->flags
= src
->flags
;
1265 dst
->time_stamp
[0] = src
->time_stamp
[0];
1266 dst
->time_stamp
[1] = src
->time_stamp
[1];
1268 dst
->beacon_interval
= src
->beacon_interval
;
1269 dst
->listen_interval
= src
->listen_interval
;
1270 dst
->atim_window
= src
->atim_window
;
1271 dst
->erp_value
= src
->erp_value
;
1273 memcpy(dst
->wpa_ie
, src
->wpa_ie
, src
->wpa_ie_len
);
1274 dst
->wpa_ie_len
= src
->wpa_ie_len
;
1275 memcpy(dst
->rsn_ie
, src
->rsn_ie
, src
->rsn_ie_len
);
1276 dst
->rsn_ie_len
= src
->rsn_ie_len
;
1278 dst
->last_scanned
= jiffies
;
1279 qos_active
= src
->qos_data
.active
;
1280 old_param
= dst
->qos_data
.old_param_count
;
1281 if (dst
->flags
& NETWORK_HAS_QOS_MASK
)
1282 memcpy(&dst
->qos_data
, &src
->qos_data
,
1283 sizeof(struct ieee80211_qos_data
));
1285 dst
->qos_data
.supported
= src
->qos_data
.supported
;
1286 dst
->qos_data
.param_count
= src
->qos_data
.param_count
;
1289 if (dst
->qos_data
.supported
== 1) {
1292 ("QoS the network %s is QoS supported\n",
1296 ("QoS the network is QoS supported\n");
1298 dst
->qos_data
.active
= qos_active
;
1299 dst
->qos_data
.old_param_count
= old_param
;
1301 /* dst->last_associate is not overwritten */
1304 static inline int is_beacon(int fc
)
1306 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc
)) == IEEE80211_STYPE_BEACON
);
1309 static void ieee80211_process_probe_response(struct ieee80211_device
1311 ieee80211_probe_response
1312 *beacon
, struct ieee80211_rx_stats
1315 struct net_device
*dev
= ieee
->dev
;
1316 struct ieee80211_network network
;
1317 struct ieee80211_network
*target
;
1318 struct ieee80211_network
*oldest
= NULL
;
1319 #ifdef CONFIG_IEEE80211_DEBUG
1320 struct ieee80211_info_element
*info_element
= beacon
->info_element
;
1322 unsigned long flags
;
1324 IEEE80211_DEBUG_SCAN("'%s' (" MAC_FMT
1325 "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1326 escape_essid(info_element
->data
,
1328 MAC_ARG(beacon
->header
.addr3
),
1329 (beacon
->capability
& (1 << 0xf)) ? '1' : '0',
1330 (beacon
->capability
& (1 << 0xe)) ? '1' : '0',
1331 (beacon
->capability
& (1 << 0xd)) ? '1' : '0',
1332 (beacon
->capability
& (1 << 0xc)) ? '1' : '0',
1333 (beacon
->capability
& (1 << 0xb)) ? '1' : '0',
1334 (beacon
->capability
& (1 << 0xa)) ? '1' : '0',
1335 (beacon
->capability
& (1 << 0x9)) ? '1' : '0',
1336 (beacon
->capability
& (1 << 0x8)) ? '1' : '0',
1337 (beacon
->capability
& (1 << 0x7)) ? '1' : '0',
1338 (beacon
->capability
& (1 << 0x6)) ? '1' : '0',
1339 (beacon
->capability
& (1 << 0x5)) ? '1' : '0',
1340 (beacon
->capability
& (1 << 0x4)) ? '1' : '0',
1341 (beacon
->capability
& (1 << 0x3)) ? '1' : '0',
1342 (beacon
->capability
& (1 << 0x2)) ? '1' : '0',
1343 (beacon
->capability
& (1 << 0x1)) ? '1' : '0',
1344 (beacon
->capability
& (1 << 0x0)) ? '1' : '0');
1346 if (ieee80211_network_init(ieee
, beacon
, &network
, stats
)) {
1347 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT
") via %s.\n",
1348 escape_essid(info_element
->data
,
1350 MAC_ARG(beacon
->header
.addr3
),
1351 is_beacon(le16_to_cpu
1354 "BEACON" : "PROBE RESPONSE");
1358 /* The network parsed correctly -- so now we scan our known networks
1359 * to see if we can find it in our list.
1361 * NOTE: This search is definitely not optimized. Once its doing
1362 * the "right thing" we'll optimize it for efficiency if
1365 /* Search for this entry in the list and update it if it is
1368 spin_lock_irqsave(&ieee
->lock
, flags
);
1370 list_for_each_entry(target
, &ieee
->network_list
, list
) {
1371 if (is_same_network(target
, &network
))
1374 if ((oldest
== NULL
) ||
1375 (target
->last_scanned
< oldest
->last_scanned
))
1379 /* If we didn't find a match, then get a new network slot to initialize
1380 * with this beacon's information */
1381 if (&target
->list
== &ieee
->network_list
) {
1382 if (list_empty(&ieee
->network_free_list
)) {
1383 /* If there are no more slots, expire the oldest */
1384 list_del(&oldest
->list
);
1386 IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT
") from "
1388 escape_essid(target
->ssid
,
1390 MAC_ARG(target
->bssid
));
1392 /* Otherwise just pull from the free list */
1393 target
= list_entry(ieee
->network_free_list
.next
,
1394 struct ieee80211_network
, list
);
1395 list_del(ieee
->network_free_list
.next
);
1398 #ifdef CONFIG_IEEE80211_DEBUG
1399 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT
") via %s.\n",
1400 escape_essid(network
.ssid
,
1402 MAC_ARG(network
.bssid
),
1403 is_beacon(le16_to_cpu
1406 "BEACON" : "PROBE RESPONSE");
1408 memcpy(target
, &network
, sizeof(*target
));
1409 list_add_tail(&target
->list
, &ieee
->network_list
);
1411 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT
") via %s.\n",
1412 escape_essid(target
->ssid
,
1414 MAC_ARG(target
->bssid
),
1415 is_beacon(le16_to_cpu
1418 "BEACON" : "PROBE RESPONSE");
1419 update_network(target
, &network
);
1422 spin_unlock_irqrestore(&ieee
->lock
, flags
);
1424 if (is_beacon(le16_to_cpu(beacon
->header
.frame_ctl
))) {
1425 if (ieee
->handle_beacon
!= NULL
)
1426 ieee
->handle_beacon(dev
, beacon
, &network
);
1428 if (ieee
->handle_probe_response
!= NULL
)
1429 ieee
->handle_probe_response(dev
, beacon
, &network
);
1433 void ieee80211_rx_mgt(struct ieee80211_device
*ieee
,
1434 struct ieee80211_hdr_4addr
*header
,
1435 struct ieee80211_rx_stats
*stats
)
1437 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header
->frame_ctl
))) {
1438 case IEEE80211_STYPE_ASSOC_RESP
:
1439 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1440 WLAN_FC_GET_STYPE(le16_to_cpu
1441 (header
->frame_ctl
)));
1442 ieee80211_handle_assoc_resp(ieee
,
1443 (struct ieee80211_assoc_response
*)
1447 case IEEE80211_STYPE_REASSOC_RESP
:
1448 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1449 WLAN_FC_GET_STYPE(le16_to_cpu
1450 (header
->frame_ctl
)));
1453 case IEEE80211_STYPE_PROBE_REQ
:
1454 IEEE80211_DEBUG_MGMT("recieved auth (%d)\n",
1455 WLAN_FC_GET_STYPE(le16_to_cpu
1456 (header
->frame_ctl
)));
1458 if (ieee
->handle_probe_request
!= NULL
)
1459 ieee
->handle_probe_request(ieee
->dev
,
1461 ieee80211_probe_request
*)
1465 case IEEE80211_STYPE_PROBE_RESP
:
1466 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1467 WLAN_FC_GET_STYPE(le16_to_cpu
1468 (header
->frame_ctl
)));
1469 IEEE80211_DEBUG_SCAN("Probe response\n");
1470 ieee80211_process_probe_response(ieee
,
1472 ieee80211_probe_response
*)
1476 case IEEE80211_STYPE_BEACON
:
1477 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1478 WLAN_FC_GET_STYPE(le16_to_cpu
1479 (header
->frame_ctl
)));
1480 IEEE80211_DEBUG_SCAN("Beacon\n");
1481 ieee80211_process_probe_response(ieee
,
1483 ieee80211_probe_response
*)
1486 case IEEE80211_STYPE_AUTH
:
1488 IEEE80211_DEBUG_MGMT("recieved auth (%d)\n",
1489 WLAN_FC_GET_STYPE(le16_to_cpu
1490 (header
->frame_ctl
)));
1492 if (ieee
->handle_auth
!= NULL
)
1493 ieee
->handle_auth(ieee
->dev
,
1494 (struct ieee80211_auth
*)header
);
1497 case IEEE80211_STYPE_DISASSOC
:
1498 if (ieee
->handle_disassoc
!= NULL
)
1499 ieee
->handle_disassoc(ieee
->dev
,
1500 (struct ieee80211_disassoc
*)
1504 case IEEE80211_STYPE_DEAUTH
:
1505 printk("DEAUTH from AP\n");
1506 if (ieee
->handle_deauth
!= NULL
)
1507 ieee
->handle_deauth(ieee
->dev
, (struct ieee80211_auth
*)
1511 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1512 WLAN_FC_GET_STYPE(le16_to_cpu
1513 (header
->frame_ctl
)));
1514 IEEE80211_WARNING("%s: Unknown management packet: %d\n",
1516 WLAN_FC_GET_STYPE(le16_to_cpu
1517 (header
->frame_ctl
)));
1522 EXPORT_SYMBOL(ieee80211_rx_mgt
);
1523 EXPORT_SYMBOL(ieee80211_rx
);