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 /* If spy monitoring on */
374 if (ieee
->spy_data
.spy_number
> 0) {
375 struct iw_quality wstats
;
378 if (rx_stats
->mask
& IEEE80211_STATMASK_RSSI
) {
379 wstats
.level
= rx_stats
->rssi
;
380 wstats
.updated
|= IW_QUAL_LEVEL_UPDATED
;
382 wstats
.updated
|= IW_QUAL_LEVEL_INVALID
;
384 if (rx_stats
->mask
& IEEE80211_STATMASK_NOISE
) {
385 wstats
.noise
= rx_stats
->noise
;
386 wstats
.updated
|= IW_QUAL_NOISE_UPDATED
;
388 wstats
.updated
|= IW_QUAL_NOISE_INVALID
;
390 if (rx_stats
->mask
& IEEE80211_STATMASK_SIGNAL
) {
391 wstats
.qual
= rx_stats
->signal
;
392 wstats
.updated
|= IW_QUAL_QUAL_UPDATED
;
394 wstats
.updated
|= IW_QUAL_QUAL_INVALID
;
396 /* Update spy records */
397 wireless_spy_update(ieee
->dev
, hdr
->addr2
, &wstats
);
399 #endif /* IW_WIRELESS_SPY */
402 hostap_update_rx_stats(local
->ap
, hdr
, rx_stats
);
405 if (ieee
->iw_mode
== IW_MODE_MONITOR
) {
406 ieee80211_monitor_rx(ieee
, skb
, rx_stats
);
408 stats
->rx_bytes
+= skb
->len
;
412 can_be_decrypted
= (is_multicast_ether_addr(hdr
->addr1
) ||
413 is_broadcast_ether_addr(hdr
->addr2
)) ?
414 ieee
->host_mc_decrypt
: ieee
->host_decrypt
;
416 if (can_be_decrypted
) {
418 if (skb
->len
>= hdrlen
+ 3) {
419 /* Top two-bits of byte 3 are the key index */
420 idx
= skb
->data
[hdrlen
+ 3] >> 6;
423 /* ieee->crypt[] is WEP_KEY (4) in length. Given that idx
424 * is only allowed 2-bits of storage, no value of idx can
425 * be provided via above code that would result in idx
426 * being out of range */
427 crypt
= ieee
->crypt
[idx
];
432 /* Use station specific key to override default keys if the
433 * receiver address is a unicast address ("individual RA"). If
434 * bcrx_sta_key parameter is set, station specific key is used
435 * even with broad/multicast targets (this is against IEEE
436 * 802.11, but makes it easier to use different keys with
437 * stations that do not support WEP key mapping). */
439 if (!(hdr
->addr1
[0] & 0x01) || local
->bcrx_sta_key
)
440 (void)hostap_handle_sta_crypto(local
, hdr
, &crypt
,
444 /* allow NULL decrypt to indicate an station specific override
445 * for default encryption */
446 if (crypt
&& (crypt
->ops
== NULL
||
447 crypt
->ops
->decrypt_mpdu
== NULL
))
450 if (!crypt
&& (fc
& IEEE80211_FCTL_PROTECTED
)) {
451 /* This seems to be triggered by some (multicast?)
452 * frames from other than current BSS, so just drop the
453 * frames silently instead of filling system log with
455 IEEE80211_DEBUG_DROP("Decryption failed (not set)"
456 " (SA=" MAC_FMT
")\n",
457 MAC_ARG(hdr
->addr2
));
458 ieee
->ieee_stats
.rx_discards_undecryptable
++;
463 if (type
!= WLAN_FC_TYPE_DATA
) {
464 if (type
== WLAN_FC_TYPE_MGMT
&& stype
== WLAN_FC_STYPE_AUTH
&&
465 fc
& IEEE80211_FCTL_PROTECTED
&& ieee
->host_decrypt
&&
466 (keyidx
= hostap_rx_frame_decrypt(ieee
, skb
, crypt
)) < 0) {
467 printk(KERN_DEBUG
"%s: failed to decrypt mgmt::auth "
468 "from " MAC_FMT
"\n", dev
->name
,
469 MAC_ARG(hdr
->addr2
));
470 /* TODO: could inform hostapd about this so that it
471 * could send auth failure report */
475 if (ieee80211_rx_frame_mgmt(ieee
, skb
, rx_stats
, type
, stype
))
482 /* Data frame - extract src/dst addresses */
483 if (skb
->len
< IEEE80211_3ADDR_LEN
)
486 switch (fc
& (IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
)) {
487 case IEEE80211_FCTL_FROMDS
:
488 memcpy(dst
, hdr
->addr1
, ETH_ALEN
);
489 memcpy(src
, hdr
->addr3
, ETH_ALEN
);
491 case IEEE80211_FCTL_TODS
:
492 memcpy(dst
, hdr
->addr3
, ETH_ALEN
);
493 memcpy(src
, hdr
->addr2
, ETH_ALEN
);
495 case IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
:
496 if (skb
->len
< IEEE80211_4ADDR_LEN
)
498 memcpy(dst
, hdr
->addr3
, ETH_ALEN
);
499 memcpy(src
, hdr
->addr4
, ETH_ALEN
);
502 memcpy(dst
, hdr
->addr1
, ETH_ALEN
);
503 memcpy(src
, hdr
->addr2
, ETH_ALEN
);
508 if (hostap_rx_frame_wds(ieee
, hdr
, fc
, &wds
))
511 skb
->dev
= dev
= wds
;
512 stats
= hostap_get_stats(dev
);
515 if (ieee
->iw_mode
== IW_MODE_MASTER
&& !wds
&&
516 (fc
& (IEEE80211_FCTL_TODS
| IEEE80211_FCTL_FROMDS
)) ==
517 IEEE80211_FCTL_FROMDS
&& ieee
->stadev
518 && !compare_ether_addr(hdr
->addr2
, ieee
->assoc_ap_addr
)) {
519 /* Frame from BSSID of the AP for which we are a client */
520 skb
->dev
= dev
= ieee
->stadev
;
521 stats
= hostap_get_stats(dev
);
526 dev
->last_rx
= jiffies
;
529 if ((ieee
->iw_mode
== IW_MODE_MASTER
||
530 ieee
->iw_mode
== IW_MODE_REPEAT
) && !from_assoc_ap
) {
531 switch (hostap_handle_sta_rx(ieee
, dev
, skb
, rx_stats
,
533 case AP_RX_CONTINUE_NOT_AUTHORIZED
:
534 frame_authorized
= 0;
537 frame_authorized
= 1;
547 /* Nullfunc frames may have PS-bit set, so they must be passed to
548 * hostap_handle_sta_rx() before being dropped here. */
550 stype
&= ~IEEE80211_STYPE_QOS_DATA
;
552 if (stype
!= IEEE80211_STYPE_DATA
&&
553 stype
!= IEEE80211_STYPE_DATA_CFACK
&&
554 stype
!= IEEE80211_STYPE_DATA_CFPOLL
&&
555 stype
!= IEEE80211_STYPE_DATA_CFACKPOLL
) {
556 if (stype
!= IEEE80211_STYPE_NULLFUNC
)
557 IEEE80211_DEBUG_DROP("RX: dropped data frame "
558 "with no data (type=0x%02x, "
559 "subtype=0x%02x, len=%d)\n",
560 type
, stype
, skb
->len
);
564 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
566 if ((fc
& IEEE80211_FCTL_PROTECTED
) && can_be_decrypted
&&
567 (keyidx
= ieee80211_rx_frame_decrypt(ieee
, skb
, crypt
)) < 0)
570 hdr
= (struct ieee80211_hdr_4addr
*)skb
->data
;
572 /* skb: hdr + (possibly fragmented) plaintext payload */
573 // PR: FIXME: hostap has additional conditions in the "if" below:
574 // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
575 if ((frag
!= 0) || (fc
& IEEE80211_FCTL_MOREFRAGS
)) {
577 struct sk_buff
*frag_skb
= ieee80211_frag_cache_get(ieee
, hdr
);
578 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag
);
581 IEEE80211_DEBUG(IEEE80211_DL_RX
| IEEE80211_DL_FRAG
,
582 "Rx cannot get skb from fragment "
583 "cache (morefrag=%d seq=%u frag=%u)\n",
584 (fc
& IEEE80211_FCTL_MOREFRAGS
) != 0,
585 WLAN_GET_SEQ_SEQ(sc
), frag
);
593 if (frag_skb
->tail
+ flen
> frag_skb
->end
) {
594 printk(KERN_WARNING
"%s: host decrypted and "
595 "reassembled frame did not fit skb\n",
597 ieee80211_frag_cache_invalidate(ieee
, hdr
);
602 /* copy first fragment (including full headers) into
603 * beginning of the fragment cache skb */
604 memcpy(skb_put(frag_skb
, flen
), skb
->data
, flen
);
606 /* append frame payload to the end of the fragment
608 memcpy(skb_put(frag_skb
, flen
), skb
->data
+ hdrlen
,
611 dev_kfree_skb_any(skb
);
614 if (fc
& IEEE80211_FCTL_MOREFRAGS
) {
615 /* more fragments expected - leave the skb in fragment
616 * cache for now; it will be delivered to upper layers
617 * after all fragments have been received */
621 /* this was the last fragment and the frame will be
622 * delivered, so remove skb from fragment cache */
624 hdr
= (struct ieee80211_hdr_4addr
*)skb
->data
;
625 ieee80211_frag_cache_invalidate(ieee
, hdr
);
628 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
629 * encrypted/authenticated */
630 if ((fc
& IEEE80211_FCTL_PROTECTED
) && can_be_decrypted
&&
631 ieee80211_rx_frame_decrypt_msdu(ieee
, skb
, keyidx
, crypt
))
634 hdr
= (struct ieee80211_hdr_4addr
*)skb
->data
;
635 if (crypt
&& !(fc
& IEEE80211_FCTL_PROTECTED
) && !ieee
->open_wep
) {
636 if ( /*ieee->ieee802_1x && */
637 ieee80211_is_eapol_frame(ieee
, skb
)) {
638 /* pass unencrypted EAPOL frames even if encryption is
641 IEEE80211_DEBUG_DROP("encryption configured, but RX "
642 "frame not encrypted (SA=" MAC_FMT
643 ")\n", MAC_ARG(hdr
->addr2
));
648 if (crypt
&& !(fc
& IEEE80211_FCTL_PROTECTED
) && !ieee
->open_wep
&&
649 !ieee80211_is_eapol_frame(ieee
, skb
)) {
650 IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
651 "frame from " MAC_FMT
652 " (drop_unencrypted=1)\n",
653 MAC_ARG(hdr
->addr2
));
657 /* skb: hdr + (possible reassembled) full plaintext payload */
659 payload
= skb
->data
+ hdrlen
;
660 ethertype
= (payload
[6] << 8) | payload
[7];
663 /* If IEEE 802.1X is used, check whether the port is authorized to send
664 * the received frame. */
665 if (ieee
->ieee802_1x
&& ieee
->iw_mode
== IW_MODE_MASTER
) {
666 if (ethertype
== ETH_P_PAE
) {
667 printk(KERN_DEBUG
"%s: RX: IEEE 802.1X frame\n",
669 if (ieee
->hostapd
&& ieee
->apdev
) {
670 /* Send IEEE 802.1X frames to the user
671 * space daemon for processing */
672 prism2_rx_80211(ieee
->apdev
, skb
, rx_stats
,
674 ieee
->apdevstats
.rx_packets
++;
675 ieee
->apdevstats
.rx_bytes
+= skb
->len
;
678 } else if (!frame_authorized
) {
679 printk(KERN_DEBUG
"%s: dropped frame from "
680 "unauthorized port (IEEE 802.1X): "
681 "ethertype=0x%04x\n", dev
->name
, ethertype
);
687 /* convert hdr + possible LLC headers into Ethernet header */
688 if (skb
->len
- hdrlen
>= 8 &&
689 ((memcmp(payload
, rfc1042_header
, SNAP_SIZE
) == 0 &&
690 ethertype
!= ETH_P_AARP
&& ethertype
!= ETH_P_IPX
) ||
691 memcmp(payload
, bridge_tunnel_header
, SNAP_SIZE
) == 0)) {
692 /* remove RFC1042 or Bridge-Tunnel encapsulation and
693 * replace EtherType */
694 skb_pull(skb
, hdrlen
+ SNAP_SIZE
);
695 memcpy(skb_push(skb
, ETH_ALEN
), src
, ETH_ALEN
);
696 memcpy(skb_push(skb
, ETH_ALEN
), dst
, ETH_ALEN
);
699 /* Leave Ethernet header part of hdr and full payload */
700 skb_pull(skb
, hdrlen
);
701 len
= htons(skb
->len
);
702 memcpy(skb_push(skb
, 2), &len
, 2);
703 memcpy(skb_push(skb
, ETH_ALEN
), src
, ETH_ALEN
);
704 memcpy(skb_push(skb
, ETH_ALEN
), dst
, ETH_ALEN
);
708 if (wds
&& ((fc
& (IEEE80211_FCTL_TODS
| IEEE80211_FCTL_FROMDS
)) ==
709 IEEE80211_FCTL_TODS
) && skb
->len
>= ETH_HLEN
+ ETH_ALEN
) {
710 /* Non-standard frame: get addr4 from its bogus location after
712 memcpy(skb
->data
+ ETH_ALEN
,
713 skb
->data
+ skb
->len
- ETH_ALEN
, ETH_ALEN
);
714 skb_trim(skb
, skb
->len
- ETH_ALEN
);
719 stats
->rx_bytes
+= skb
->len
;
722 if (ieee
->iw_mode
== IW_MODE_MASTER
&& !wds
&& ieee
->ap
->bridge_packets
) {
724 /* copy multicast frame both to the higher layers and
725 * to the wireless media */
726 ieee
->ap
->bridged_multicast
++;
727 skb2
= skb_clone(skb
, GFP_ATOMIC
);
729 printk(KERN_DEBUG
"%s: skb_clone failed for "
730 "multicast frame\n", dev
->name
);
731 } else if (hostap_is_sta_assoc(ieee
->ap
, dst
)) {
732 /* send frame directly to the associated STA using
733 * wireless media and not passing to higher layers */
734 ieee
->ap
->bridged_unicast
++;
741 /* send to wireless media */
742 skb2
->protocol
= __constant_htons(ETH_P_802_3
);
743 skb2
->mac
.raw
= skb2
->nh
.raw
= skb2
->data
;
744 /* skb2->nh.raw = skb2->data + ETH_HLEN; */
746 dev_queue_xmit(skb2
);
751 skb
->protocol
= eth_type_trans(skb
, dev
);
752 memset(skb
->cb
, 0, sizeof(skb
->cb
));
754 skb
->ip_summed
= CHECKSUM_NONE
; /* 802.11 crc not sufficient */
755 if (netif_rx(skb
) == NET_RX_DROP
) {
756 /* netif_rx always succeeds, but it might drop
757 * the packet. If it drops the packet, we log that
760 ("RX: netif_rx dropped the packet\n");
768 hostap_handle_sta_release(sta
);
775 /* Returning 0 indicates to caller that we have not handled the SKB--
776 * so it is still allocated and can be used again by underlying
777 * hardware as a DMA target */
781 /* Filter out unrelated packets, call ieee80211_rx[_mgt] */
782 int ieee80211_rx_any(struct ieee80211_device
*ieee
,
783 struct sk_buff
*skb
, struct ieee80211_rx_stats
*stats
)
785 struct ieee80211_hdr_4addr
*hdr
;
786 int is_packet_for_us
;
789 if (ieee
->iw_mode
== IW_MODE_MONITOR
)
790 return ieee80211_rx(ieee
, skb
, stats
) ? 0 : -EINVAL
;
792 hdr
= (struct ieee80211_hdr_4addr
*)skb
->data
;
793 fc
= le16_to_cpu(hdr
->frame_ctl
);
795 if ((fc
& IEEE80211_FCTL_VERS
) != 0)
798 switch (fc
& IEEE80211_FCTL_FTYPE
) {
799 case IEEE80211_FTYPE_MGMT
:
800 ieee80211_rx_mgt(ieee
, hdr
, stats
);
802 case IEEE80211_FTYPE_DATA
:
804 case IEEE80211_FTYPE_CTL
:
810 is_packet_for_us
= 0;
811 switch (ieee
->iw_mode
) {
813 /* our BSS and not from/to DS */
814 if (memcmp(hdr
->addr3
, ieee
->bssid
, ETH_ALEN
) == 0)
815 if ((fc
& (IEEE80211_FCTL_TODS
+IEEE80211_FCTL_FROMDS
)) == 0) {
816 /* promisc: get all */
817 if (ieee
->dev
->flags
& IFF_PROMISC
)
818 is_packet_for_us
= 1;
820 else if (memcmp(hdr
->addr1
, ieee
->dev
->dev_addr
, ETH_ALEN
) == 0)
821 is_packet_for_us
= 1;
823 else if (is_multicast_ether_addr(hdr
->addr1
))
824 is_packet_for_us
= 1;
828 /* our BSS (== from our AP) and from DS */
829 if (memcmp(hdr
->addr2
, ieee
->bssid
, ETH_ALEN
) == 0)
830 if ((fc
& (IEEE80211_FCTL_TODS
+IEEE80211_FCTL_FROMDS
)) == IEEE80211_FCTL_FROMDS
) {
831 /* promisc: get all */
832 if (ieee
->dev
->flags
& IFF_PROMISC
)
833 is_packet_for_us
= 1;
835 else if (memcmp(hdr
->addr1
, ieee
->dev
->dev_addr
, ETH_ALEN
) == 0)
836 is_packet_for_us
= 1;
838 else if (is_multicast_ether_addr(hdr
->addr1
)) {
839 /* not our own packet bcasted from AP */
840 if (memcmp(hdr
->addr3
, ieee
->dev
->dev_addr
, ETH_ALEN
))
841 is_packet_for_us
= 1;
850 if (is_packet_for_us
)
851 return (ieee80211_rx(ieee
, skb
, stats
) ? 0 : -EINVAL
);
855 #define MGMT_FRAME_FIXED_PART_LENGTH 0x24
857 static u8 qos_oui
[QOS_OUI_LEN
] = { 0x00, 0x50, 0xF2 };
860 * Make ther structure we read from the beacon packet has
863 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
864 *info_element
, int sub_type
)
867 if (info_element
->qui_subtype
!= sub_type
)
869 if (memcmp(info_element
->qui
, qos_oui
, QOS_OUI_LEN
))
871 if (info_element
->qui_type
!= QOS_OUI_TYPE
)
873 if (info_element
->version
!= QOS_VERSION_1
)
880 * Parse a QoS parameter element
882 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
883 *element_param
, struct ieee80211_info_element
887 u16 size
= sizeof(struct ieee80211_qos_parameter_info
) - 2;
889 if ((info_element
== NULL
) || (element_param
== NULL
))
892 if (info_element
->id
== QOS_ELEMENT_ID
&& info_element
->len
== size
) {
893 memcpy(element_param
->info_element
.qui
, info_element
->data
,
895 element_param
->info_element
.elementID
= info_element
->id
;
896 element_param
->info_element
.length
= info_element
->len
;
900 ret
= ieee80211_verify_qos_info(&element_param
->info_element
,
901 QOS_OUI_PARAM_SUB_TYPE
);
906 * Parse a QoS information element
908 static int ieee80211_read_qos_info_element(struct
909 ieee80211_qos_information_element
910 *element_info
, struct ieee80211_info_element
914 u16 size
= sizeof(struct ieee80211_qos_information_element
) - 2;
916 if (element_info
== NULL
)
918 if (info_element
== NULL
)
921 if ((info_element
->id
== QOS_ELEMENT_ID
) && (info_element
->len
== size
)) {
922 memcpy(element_info
->qui
, info_element
->data
,
924 element_info
->elementID
= info_element
->id
;
925 element_info
->length
= info_element
->len
;
930 ret
= ieee80211_verify_qos_info(element_info
,
931 QOS_OUI_INFO_SUB_TYPE
);
936 * Write QoS parameters from the ac parameters.
938 static int ieee80211_qos_convert_ac_to_parameters(struct
939 ieee80211_qos_parameter_info
941 ieee80211_qos_parameters
946 struct ieee80211_qos_ac_parameter
*ac_params
;
951 for (i
= 0; i
< QOS_QUEUE_NUM
; i
++) {
952 ac_params
= &(param_elm
->ac_params_record
[i
]);
954 qos_param
->aifs
[i
] = (ac_params
->aci_aifsn
) & 0x0F;
955 qos_param
->aifs
[i
] -= (qos_param
->aifs
[i
] < 2) ? 0 : 2;
957 cw_min
= ac_params
->ecw_min_max
& 0x0F;
958 qos_param
->cw_min
[i
] = (u16
) ((1 << cw_min
) - 1);
960 cw_max
= (ac_params
->ecw_min_max
& 0xF0) >> 4;
961 qos_param
->cw_max
[i
] = (u16
) ((1 << cw_max
) - 1);
964 (ac_params
->aci_aifsn
& 0x10) ? 0x01 : 0x00;
966 txop
= le16_to_cpu(ac_params
->tx_op_limit
) * 32;
967 qos_param
->tx_op_limit
[i
] = (u16
) txop
;
973 * we have a generic data element which it may contain QoS information or
974 * parameters element. check the information element length to decide
977 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
979 struct ieee80211_network
*network
)
982 struct ieee80211_qos_parameters
*qos_param
= NULL
;
983 struct ieee80211_qos_information_element qos_info_element
;
985 rc
= ieee80211_read_qos_info_element(&qos_info_element
, info_element
);
988 network
->qos_data
.param_count
= qos_info_element
.ac_info
& 0x0F;
989 network
->flags
|= NETWORK_HAS_QOS_INFORMATION
;
991 struct ieee80211_qos_parameter_info param_element
;
993 rc
= ieee80211_read_qos_param_element(¶m_element
,
996 qos_param
= &(network
->qos_data
.parameters
);
997 ieee80211_qos_convert_ac_to_parameters(¶m_element
,
999 network
->flags
|= NETWORK_HAS_QOS_PARAMETERS
;
1000 network
->qos_data
.param_count
=
1001 param_element
.info_element
.ac_info
& 0x0F;
1006 IEEE80211_DEBUG_QOS("QoS is supported\n");
1007 network
->qos_data
.supported
= 1;
1012 #ifdef CONFIG_IEEE80211_DEBUG
1013 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1015 static const char *get_info_element_string(u16 id
)
1020 MFIE_STRING(FH_SET
);
1021 MFIE_STRING(DS_SET
);
1022 MFIE_STRING(CF_SET
);
1024 MFIE_STRING(IBSS_SET
);
1025 MFIE_STRING(COUNTRY
);
1026 MFIE_STRING(HOP_PARAMS
);
1027 MFIE_STRING(HOP_TABLE
);
1028 MFIE_STRING(REQUEST
);
1029 MFIE_STRING(CHALLENGE
);
1030 MFIE_STRING(POWER_CONSTRAINT
);
1031 MFIE_STRING(POWER_CAPABILITY
);
1032 MFIE_STRING(TPC_REQUEST
);
1033 MFIE_STRING(TPC_REPORT
);
1034 MFIE_STRING(SUPP_CHANNELS
);
1036 MFIE_STRING(MEASURE_REQUEST
);
1037 MFIE_STRING(MEASURE_REPORT
);
1039 MFIE_STRING(IBSS_DFS
);
1040 MFIE_STRING(ERP_INFO
);
1042 MFIE_STRING(RATES_EX
);
1043 MFIE_STRING(GENERIC
);
1044 MFIE_STRING(QOS_PARAMETER
);
1051 static int ieee80211_parse_info_param(struct ieee80211_info_element
1052 *info_element
, u16 length
,
1053 struct ieee80211_network
*network
)
1056 #ifdef CONFIG_IEEE80211_DEBUG
1061 while (length
>= sizeof(*info_element
)) {
1062 if (sizeof(*info_element
) + info_element
->len
> length
) {
1063 IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1064 "info_element->len + 2 > left : "
1065 "info_element->len+2=%zd left=%d, id=%d.\n",
1067 sizeof(*info_element
),
1068 length
, info_element
->id
);
1072 switch (info_element
->id
) {
1073 case MFIE_TYPE_SSID
:
1074 if (ieee80211_is_empty_essid(info_element
->data
,
1075 info_element
->len
)) {
1076 network
->flags
|= NETWORK_EMPTY_ESSID
;
1080 network
->ssid_len
= min(info_element
->len
,
1081 (u8
) IW_ESSID_MAX_SIZE
);
1082 memcpy(network
->ssid
, info_element
->data
,
1084 if (network
->ssid_len
< IW_ESSID_MAX_SIZE
)
1085 memset(network
->ssid
+ network
->ssid_len
, 0,
1086 IW_ESSID_MAX_SIZE
- network
->ssid_len
);
1088 IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1089 network
->ssid
, network
->ssid_len
);
1092 case MFIE_TYPE_RATES
:
1093 #ifdef CONFIG_IEEE80211_DEBUG
1096 network
->rates_len
= min(info_element
->len
,
1098 for (i
= 0; i
< network
->rates_len
; i
++) {
1099 network
->rates
[i
] = info_element
->data
[i
];
1100 #ifdef CONFIG_IEEE80211_DEBUG
1101 p
+= snprintf(p
, sizeof(rates_str
) -
1102 (p
- rates_str
), "%02X ",
1105 if (ieee80211_is_ofdm_rate
1106 (info_element
->data
[i
])) {
1107 network
->flags
|= NETWORK_HAS_OFDM
;
1108 if (info_element
->data
[i
] &
1109 IEEE80211_BASIC_RATE_MASK
)
1115 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1116 rates_str
, network
->rates_len
);
1119 case MFIE_TYPE_RATES_EX
:
1120 #ifdef CONFIG_IEEE80211_DEBUG
1123 network
->rates_ex_len
= min(info_element
->len
,
1124 MAX_RATES_EX_LENGTH
);
1125 for (i
= 0; i
< network
->rates_ex_len
; i
++) {
1126 network
->rates_ex
[i
] = info_element
->data
[i
];
1127 #ifdef CONFIG_IEEE80211_DEBUG
1128 p
+= snprintf(p
, sizeof(rates_str
) -
1129 (p
- rates_str
), "%02X ",
1132 if (ieee80211_is_ofdm_rate
1133 (info_element
->data
[i
])) {
1134 network
->flags
|= NETWORK_HAS_OFDM
;
1135 if (info_element
->data
[i
] &
1136 IEEE80211_BASIC_RATE_MASK
)
1142 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1143 rates_str
, network
->rates_ex_len
);
1146 case MFIE_TYPE_DS_SET
:
1147 IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1148 info_element
->data
[0]);
1149 network
->channel
= info_element
->data
[0];
1152 case MFIE_TYPE_FH_SET
:
1153 IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1156 case MFIE_TYPE_CF_SET
:
1157 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1161 network
->tim
.tim_count
= info_element
->data
[0];
1162 network
->tim
.tim_period
= info_element
->data
[1];
1163 IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1166 case MFIE_TYPE_ERP_INFO
:
1167 network
->erp_value
= info_element
->data
[0];
1168 IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1169 network
->erp_value
);
1172 case MFIE_TYPE_IBSS_SET
:
1173 network
->atim_window
= info_element
->data
[0];
1174 IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1175 network
->atim_window
);
1178 case MFIE_TYPE_CHALLENGE
:
1179 IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1182 case MFIE_TYPE_GENERIC
:
1183 IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1185 if (!ieee80211_parse_qos_info_param_IE(info_element
,
1189 if (info_element
->len
>= 4 &&
1190 info_element
->data
[0] == 0x00 &&
1191 info_element
->data
[1] == 0x50 &&
1192 info_element
->data
[2] == 0xf2 &&
1193 info_element
->data
[3] == 0x01) {
1194 network
->wpa_ie_len
= min(info_element
->len
+ 2,
1196 memcpy(network
->wpa_ie
, info_element
,
1197 network
->wpa_ie_len
);
1202 IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1204 network
->rsn_ie_len
= min(info_element
->len
+ 2,
1206 memcpy(network
->rsn_ie
, info_element
,
1207 network
->rsn_ie_len
);
1210 case MFIE_TYPE_QOS_PARAMETER
:
1212 "QoS Error need to parse QOS_PARAMETER IE\n");
1215 case MFIE_TYPE_POWER_CONSTRAINT
:
1216 network
->power_constraint
= info_element
->data
[0];
1217 network
->flags
|= NETWORK_HAS_POWER_CONSTRAINT
;
1221 network
->power_constraint
= info_element
->data
[0];
1222 network
->flags
|= NETWORK_HAS_CSA
;
1225 case MFIE_TYPE_QUIET
:
1226 network
->quiet
.count
= info_element
->data
[0];
1227 network
->quiet
.period
= info_element
->data
[1];
1228 network
->quiet
.duration
= info_element
->data
[2];
1229 network
->quiet
.offset
= info_element
->data
[3];
1230 network
->flags
|= NETWORK_HAS_QUIET
;
1233 case MFIE_TYPE_IBSS_DFS
:
1234 if (network
->ibss_dfs
)
1237 kmalloc(info_element
->len
, GFP_ATOMIC
);
1238 if (!network
->ibss_dfs
)
1240 memcpy(network
->ibss_dfs
, info_element
->data
,
1242 network
->flags
|= NETWORK_HAS_IBSS_DFS
;
1245 case MFIE_TYPE_TPC_REPORT
:
1246 network
->tpc_report
.transmit_power
=
1247 info_element
->data
[0];
1248 network
->tpc_report
.link_margin
= info_element
->data
[1];
1249 network
->flags
|= NETWORK_HAS_TPC_REPORT
;
1253 IEEE80211_DEBUG_MGMT
1254 ("Unsupported info element: %s (%d)\n",
1255 get_info_element_string(info_element
->id
),
1260 length
-= sizeof(*info_element
) + info_element
->len
;
1262 (struct ieee80211_info_element
*)&info_element
->
1263 data
[info_element
->len
];
1269 static int ieee80211_handle_assoc_resp(struct ieee80211_device
*ieee
, struct ieee80211_assoc_response
1270 *frame
, struct ieee80211_rx_stats
*stats
)
1272 struct ieee80211_network network_resp
= {
1275 struct ieee80211_network
*network
= &network_resp
;
1276 struct net_device
*dev
= ieee
->dev
;
1279 network
->qos_data
.active
= 0;
1280 network
->qos_data
.supported
= 0;
1281 network
->qos_data
.param_count
= 0;
1282 network
->qos_data
.old_param_count
= 0;
1284 //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1285 network
->atim_window
= le16_to_cpu(frame
->aid
);
1286 network
->listen_interval
= le16_to_cpu(frame
->status
);
1287 memcpy(network
->bssid
, frame
->header
.addr3
, ETH_ALEN
);
1288 network
->capability
= le16_to_cpu(frame
->capability
);
1289 network
->last_scanned
= jiffies
;
1290 network
->rates_len
= network
->rates_ex_len
= 0;
1291 network
->last_associate
= 0;
1292 network
->ssid_len
= 0;
1293 network
->erp_value
=
1294 (network
->capability
& WLAN_CAPABILITY_IBSS
) ? 0x3 : 0x0;
1296 if (stats
->freq
== IEEE80211_52GHZ_BAND
) {
1297 /* for A band (No DS info) */
1298 network
->channel
= stats
->received_channel
;
1300 network
->flags
|= NETWORK_HAS_CCK
;
1302 network
->wpa_ie_len
= 0;
1303 network
->rsn_ie_len
= 0;
1305 if (ieee80211_parse_info_param
1306 (frame
->info_element
, stats
->len
- sizeof(*frame
), network
))
1310 if (stats
->freq
== IEEE80211_52GHZ_BAND
)
1311 network
->mode
= IEEE_A
;
1313 if (network
->flags
& NETWORK_HAS_OFDM
)
1314 network
->mode
|= IEEE_G
;
1315 if (network
->flags
& NETWORK_HAS_CCK
)
1316 network
->mode
|= IEEE_B
;
1319 if (ieee80211_is_empty_essid(network
->ssid
, network
->ssid_len
))
1320 network
->flags
|= NETWORK_EMPTY_ESSID
;
1322 memcpy(&network
->stats
, stats
, sizeof(network
->stats
));
1324 if (ieee
->handle_assoc_response
!= NULL
)
1325 ieee
->handle_assoc_response(dev
, frame
, network
);
1330 /***************************************************/
1332 static int ieee80211_network_init(struct ieee80211_device
*ieee
, struct ieee80211_probe_response
1334 struct ieee80211_network
*network
,
1335 struct ieee80211_rx_stats
*stats
)
1337 network
->qos_data
.active
= 0;
1338 network
->qos_data
.supported
= 0;
1339 network
->qos_data
.param_count
= 0;
1340 network
->qos_data
.old_param_count
= 0;
1342 /* Pull out fixed field data */
1343 memcpy(network
->bssid
, beacon
->header
.addr3
, ETH_ALEN
);
1344 network
->capability
= le16_to_cpu(beacon
->capability
);
1345 network
->last_scanned
= jiffies
;
1346 network
->time_stamp
[0] = le32_to_cpu(beacon
->time_stamp
[0]);
1347 network
->time_stamp
[1] = le32_to_cpu(beacon
->time_stamp
[1]);
1348 network
->beacon_interval
= le16_to_cpu(beacon
->beacon_interval
);
1349 /* Where to pull this? beacon->listen_interval; */
1350 network
->listen_interval
= 0x0A;
1351 network
->rates_len
= network
->rates_ex_len
= 0;
1352 network
->last_associate
= 0;
1353 network
->ssid_len
= 0;
1355 network
->atim_window
= 0;
1356 network
->erp_value
= (network
->capability
& WLAN_CAPABILITY_IBSS
) ?
1359 if (stats
->freq
== IEEE80211_52GHZ_BAND
) {
1360 /* for A band (No DS info) */
1361 network
->channel
= stats
->received_channel
;
1363 network
->flags
|= NETWORK_HAS_CCK
;
1365 network
->wpa_ie_len
= 0;
1366 network
->rsn_ie_len
= 0;
1368 if (ieee80211_parse_info_param
1369 (beacon
->info_element
, stats
->len
- sizeof(*beacon
), network
))
1373 if (stats
->freq
== IEEE80211_52GHZ_BAND
)
1374 network
->mode
= IEEE_A
;
1376 if (network
->flags
& NETWORK_HAS_OFDM
)
1377 network
->mode
|= IEEE_G
;
1378 if (network
->flags
& NETWORK_HAS_CCK
)
1379 network
->mode
|= IEEE_B
;
1382 if (network
->mode
== 0) {
1383 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT
")' "
1385 escape_essid(network
->ssid
,
1387 MAC_ARG(network
->bssid
));
1391 if (ieee80211_is_empty_essid(network
->ssid
, network
->ssid_len
))
1392 network
->flags
|= NETWORK_EMPTY_ESSID
;
1394 memcpy(&network
->stats
, stats
, sizeof(network
->stats
));
1399 static inline int is_same_network(struct ieee80211_network
*src
,
1400 struct ieee80211_network
*dst
)
1402 /* A network is only a duplicate if the channel, BSSID, and ESSID
1403 * all match. We treat all <hidden> with the same BSSID and channel
1405 return ((src
->ssid_len
== dst
->ssid_len
) &&
1406 (src
->channel
== dst
->channel
) &&
1407 !compare_ether_addr(src
->bssid
, dst
->bssid
) &&
1408 !memcmp(src
->ssid
, dst
->ssid
, src
->ssid_len
));
1411 static void update_network(struct ieee80211_network
*dst
,
1412 struct ieee80211_network
*src
)
1417 ieee80211_network_reset(dst
);
1418 dst
->ibss_dfs
= src
->ibss_dfs
;
1420 /* We only update the statistics if they were created by receiving
1421 * the network information on the actual channel the network is on.
1423 * This keeps beacons received on neighbor channels from bringing
1424 * down the signal level of an AP. */
1425 if (dst
->channel
== src
->stats
.received_channel
)
1426 memcpy(&dst
->stats
, &src
->stats
,
1427 sizeof(struct ieee80211_rx_stats
));
1429 IEEE80211_DEBUG_SCAN("Network " MAC_FMT
" info received "
1430 "off channel (%d vs. %d)\n", MAC_ARG(src
->bssid
),
1431 dst
->channel
, src
->stats
.received_channel
);
1433 dst
->capability
= src
->capability
;
1434 memcpy(dst
->rates
, src
->rates
, src
->rates_len
);
1435 dst
->rates_len
= src
->rates_len
;
1436 memcpy(dst
->rates_ex
, src
->rates_ex
, src
->rates_ex_len
);
1437 dst
->rates_ex_len
= src
->rates_ex_len
;
1439 dst
->mode
= src
->mode
;
1440 dst
->flags
= src
->flags
;
1441 dst
->time_stamp
[0] = src
->time_stamp
[0];
1442 dst
->time_stamp
[1] = src
->time_stamp
[1];
1444 dst
->beacon_interval
= src
->beacon_interval
;
1445 dst
->listen_interval
= src
->listen_interval
;
1446 dst
->atim_window
= src
->atim_window
;
1447 dst
->erp_value
= src
->erp_value
;
1448 dst
->tim
= src
->tim
;
1450 memcpy(dst
->wpa_ie
, src
->wpa_ie
, src
->wpa_ie_len
);
1451 dst
->wpa_ie_len
= src
->wpa_ie_len
;
1452 memcpy(dst
->rsn_ie
, src
->rsn_ie
, src
->rsn_ie_len
);
1453 dst
->rsn_ie_len
= src
->rsn_ie_len
;
1455 dst
->last_scanned
= jiffies
;
1456 qos_active
= src
->qos_data
.active
;
1457 old_param
= dst
->qos_data
.old_param_count
;
1458 if (dst
->flags
& NETWORK_HAS_QOS_MASK
)
1459 memcpy(&dst
->qos_data
, &src
->qos_data
,
1460 sizeof(struct ieee80211_qos_data
));
1462 dst
->qos_data
.supported
= src
->qos_data
.supported
;
1463 dst
->qos_data
.param_count
= src
->qos_data
.param_count
;
1466 if (dst
->qos_data
.supported
== 1) {
1469 ("QoS the network %s is QoS supported\n",
1473 ("QoS the network is QoS supported\n");
1475 dst
->qos_data
.active
= qos_active
;
1476 dst
->qos_data
.old_param_count
= old_param
;
1478 /* dst->last_associate is not overwritten */
1481 static inline int is_beacon(__le16 fc
)
1483 return (WLAN_FC_GET_STYPE(le16_to_cpu(fc
)) == IEEE80211_STYPE_BEACON
);
1486 static void ieee80211_process_probe_response(struct ieee80211_device
1488 ieee80211_probe_response
1489 *beacon
, struct ieee80211_rx_stats
1492 struct net_device
*dev
= ieee
->dev
;
1493 struct ieee80211_network network
= {
1496 struct ieee80211_network
*target
;
1497 struct ieee80211_network
*oldest
= NULL
;
1498 #ifdef CONFIG_IEEE80211_DEBUG
1499 struct ieee80211_info_element
*info_element
= beacon
->info_element
;
1501 unsigned long flags
;
1503 IEEE80211_DEBUG_SCAN("'%s' (" MAC_FMT
1504 "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1505 escape_essid(info_element
->data
,
1507 MAC_ARG(beacon
->header
.addr3
),
1508 (beacon
->capability
& (1 << 0xf)) ? '1' : '0',
1509 (beacon
->capability
& (1 << 0xe)) ? '1' : '0',
1510 (beacon
->capability
& (1 << 0xd)) ? '1' : '0',
1511 (beacon
->capability
& (1 << 0xc)) ? '1' : '0',
1512 (beacon
->capability
& (1 << 0xb)) ? '1' : '0',
1513 (beacon
->capability
& (1 << 0xa)) ? '1' : '0',
1514 (beacon
->capability
& (1 << 0x9)) ? '1' : '0',
1515 (beacon
->capability
& (1 << 0x8)) ? '1' : '0',
1516 (beacon
->capability
& (1 << 0x7)) ? '1' : '0',
1517 (beacon
->capability
& (1 << 0x6)) ? '1' : '0',
1518 (beacon
->capability
& (1 << 0x5)) ? '1' : '0',
1519 (beacon
->capability
& (1 << 0x4)) ? '1' : '0',
1520 (beacon
->capability
& (1 << 0x3)) ? '1' : '0',
1521 (beacon
->capability
& (1 << 0x2)) ? '1' : '0',
1522 (beacon
->capability
& (1 << 0x1)) ? '1' : '0',
1523 (beacon
->capability
& (1 << 0x0)) ? '1' : '0');
1525 if (ieee80211_network_init(ieee
, beacon
, &network
, stats
)) {
1526 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT
") via %s.\n",
1527 escape_essid(info_element
->data
,
1529 MAC_ARG(beacon
->header
.addr3
),
1530 is_beacon(beacon
->header
.frame_ctl
) ?
1531 "BEACON" : "PROBE RESPONSE");
1535 /* The network parsed correctly -- so now we scan our known networks
1536 * to see if we can find it in our list.
1538 * NOTE: This search is definitely not optimized. Once its doing
1539 * the "right thing" we'll optimize it for efficiency if
1542 /* Search for this entry in the list and update it if it is
1545 spin_lock_irqsave(&ieee
->lock
, flags
);
1547 list_for_each_entry(target
, &ieee
->network_list
, list
) {
1548 if (is_same_network(target
, &network
))
1551 if ((oldest
== NULL
) ||
1552 (target
->last_scanned
< oldest
->last_scanned
))
1556 /* If we didn't find a match, then get a new network slot to initialize
1557 * with this beacon's information */
1558 if (&target
->list
== &ieee
->network_list
) {
1559 if (list_empty(&ieee
->network_free_list
)) {
1560 /* If there are no more slots, expire the oldest */
1561 list_del(&oldest
->list
);
1563 IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT
") from "
1565 escape_essid(target
->ssid
,
1567 MAC_ARG(target
->bssid
));
1568 ieee80211_network_reset(target
);
1570 /* Otherwise just pull from the free list */
1571 target
= list_entry(ieee
->network_free_list
.next
,
1572 struct ieee80211_network
, list
);
1573 list_del(ieee
->network_free_list
.next
);
1576 #ifdef CONFIG_IEEE80211_DEBUG
1577 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT
") via %s.\n",
1578 escape_essid(network
.ssid
,
1580 MAC_ARG(network
.bssid
),
1581 is_beacon(beacon
->header
.frame_ctl
) ?
1582 "BEACON" : "PROBE RESPONSE");
1584 memcpy(target
, &network
, sizeof(*target
));
1585 network
.ibss_dfs
= NULL
;
1586 list_add_tail(&target
->list
, &ieee
->network_list
);
1588 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT
") via %s.\n",
1589 escape_essid(target
->ssid
,
1591 MAC_ARG(target
->bssid
),
1592 is_beacon(beacon
->header
.frame_ctl
) ?
1593 "BEACON" : "PROBE RESPONSE");
1594 update_network(target
, &network
);
1595 network
.ibss_dfs
= NULL
;
1598 spin_unlock_irqrestore(&ieee
->lock
, flags
);
1600 if (is_beacon(beacon
->header
.frame_ctl
)) {
1601 if (ieee
->handle_beacon
!= NULL
)
1602 ieee
->handle_beacon(dev
, beacon
, target
);
1604 if (ieee
->handle_probe_response
!= NULL
)
1605 ieee
->handle_probe_response(dev
, beacon
, target
);
1609 void ieee80211_rx_mgt(struct ieee80211_device
*ieee
,
1610 struct ieee80211_hdr_4addr
*header
,
1611 struct ieee80211_rx_stats
*stats
)
1613 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header
->frame_ctl
))) {
1614 case IEEE80211_STYPE_ASSOC_RESP
:
1615 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1616 WLAN_FC_GET_STYPE(le16_to_cpu
1617 (header
->frame_ctl
)));
1618 ieee80211_handle_assoc_resp(ieee
,
1619 (struct ieee80211_assoc_response
*)
1623 case IEEE80211_STYPE_REASSOC_RESP
:
1624 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1625 WLAN_FC_GET_STYPE(le16_to_cpu
1626 (header
->frame_ctl
)));
1629 case IEEE80211_STYPE_PROBE_REQ
:
1630 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1631 WLAN_FC_GET_STYPE(le16_to_cpu
1632 (header
->frame_ctl
)));
1634 if (ieee
->handle_probe_request
!= NULL
)
1635 ieee
->handle_probe_request(ieee
->dev
,
1637 ieee80211_probe_request
*)
1641 case IEEE80211_STYPE_PROBE_RESP
:
1642 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1643 WLAN_FC_GET_STYPE(le16_to_cpu
1644 (header
->frame_ctl
)));
1645 IEEE80211_DEBUG_SCAN("Probe response\n");
1646 ieee80211_process_probe_response(ieee
,
1648 ieee80211_probe_response
*)
1652 case IEEE80211_STYPE_BEACON
:
1653 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1654 WLAN_FC_GET_STYPE(le16_to_cpu
1655 (header
->frame_ctl
)));
1656 IEEE80211_DEBUG_SCAN("Beacon\n");
1657 ieee80211_process_probe_response(ieee
,
1659 ieee80211_probe_response
*)
1662 case IEEE80211_STYPE_AUTH
:
1664 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1665 WLAN_FC_GET_STYPE(le16_to_cpu
1666 (header
->frame_ctl
)));
1668 if (ieee
->handle_auth
!= NULL
)
1669 ieee
->handle_auth(ieee
->dev
,
1670 (struct ieee80211_auth
*)header
);
1673 case IEEE80211_STYPE_DISASSOC
:
1674 if (ieee
->handle_disassoc
!= NULL
)
1675 ieee
->handle_disassoc(ieee
->dev
,
1676 (struct ieee80211_disassoc
*)
1680 case IEEE80211_STYPE_ACTION
:
1681 IEEE80211_DEBUG_MGMT("ACTION\n");
1682 if (ieee
->handle_action
)
1683 ieee
->handle_action(ieee
->dev
,
1684 (struct ieee80211_action
*)
1688 case IEEE80211_STYPE_REASSOC_REQ
:
1689 IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
1690 WLAN_FC_GET_STYPE(le16_to_cpu
1691 (header
->frame_ctl
)));
1693 IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
1695 if (ieee
->handle_reassoc_request
!= NULL
)
1696 ieee
->handle_reassoc_request(ieee
->dev
,
1697 (struct ieee80211_reassoc_request
*)
1701 case IEEE80211_STYPE_ASSOC_REQ
:
1702 IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
1703 WLAN_FC_GET_STYPE(le16_to_cpu
1704 (header
->frame_ctl
)));
1706 IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
1708 if (ieee
->handle_assoc_request
!= NULL
)
1709 ieee
->handle_assoc_request(ieee
->dev
);
1712 case IEEE80211_STYPE_DEAUTH
:
1713 IEEE80211_DEBUG_MGMT("DEAUTH\n");
1714 if (ieee
->handle_deauth
!= NULL
)
1715 ieee
->handle_deauth(ieee
->dev
,
1716 (struct ieee80211_deauth
*)
1720 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1721 WLAN_FC_GET_STYPE(le16_to_cpu
1722 (header
->frame_ctl
)));
1723 IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1725 WLAN_FC_GET_STYPE(le16_to_cpu
1726 (header
->frame_ctl
)));
1731 EXPORT_SYMBOL(ieee80211_rx_mgt
);
1732 EXPORT_SYMBOL(ieee80211_rx
);