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/*
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
#include "interface.h"
#include "extract.h"
#include "addrtoname.h"
#include "ethertype.h"
/*
* Structure of a header for Apple's IP-over-IEEE 1384 BPF header.
*/
#define FIREWIRE_EUI64_LEN 8
struct firewire_header {
u_char firewire_dhost[FIREWIRE_EUI64_LEN];
u_char firewire_shost[FIREWIRE_EUI64_LEN];
u_short firewire_type;
};
/*
* Length of that header; note that some compilers may pad
* "struct firewire_header" to a multiple of 4 bytes, for example, so
* "sizeof (struct firewire_header)" may not give the right answer.
*/
#define FIREWIRE_HDRLEN 18
static inline void
ap1394_hdr_print(netdissect_options *ndo, register const u_char *bp, u_int length)
{
register const struct firewire_header *fp;
uint16_t firewire_type;
fp = (const struct firewire_header *)bp;
ND_PRINT((ndo, "%s > %s",
linkaddr_string(ndo, fp->firewire_shost, LINKADDR_IEEE1394, FIREWIRE_EUI64_LEN),
linkaddr_string(ndo, fp->firewire_dhost, LINKADDR_IEEE1394, FIREWIRE_EUI64_LEN)));
firewire_type = EXTRACT_16BITS(&fp->firewire_type);
if (!ndo->ndo_qflag) {
ND_PRINT((ndo, ", ethertype %s (0x%04x)",
tok2str(ethertype_values,"Unknown", firewire_type),
firewire_type));
} else {
ND_PRINT((ndo, ", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", firewire_type)));
}
ND_PRINT((ndo, ", length %u: ", length));
}
/*
* This is the top level routine of the printer. 'p' points
* to the ether header of the packet, 'h->ts' is the timestamp,
* 'h->len' is the length of the packet off the wire, and 'h->caplen'
* is the number of bytes actually captured.
*/
u_int
ap1394_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
{
u_int length = h->len;
u_int caplen = h->caplen;
struct firewire_header *fp;
u_short ether_type;
if (caplen < FIREWIRE_HDRLEN) {
ND_PRINT((ndo, "[|ap1394]"));
return FIREWIRE_HDRLEN;
}
if (ndo->ndo_eflag)
ap1394_hdr_print(ndo, p, length);
length -= FIREWIRE_HDRLEN;
caplen -= FIREWIRE_HDRLEN;
fp = (struct firewire_header *)p;
p += FIREWIRE_HDRLEN;
ether_type = EXTRACT_16BITS(&fp->firewire_type);
if (ethertype_print(ndo, ether_type, p, length, caplen) == 0) {
/* ether_type not known, print raw packet */
if (!ndo->ndo_eflag)
ap1394_hdr_print(ndo, (u_char *)fp, length + FIREWIRE_HDRLEN);
if (!ndo->ndo_suppress_default_print)
ND_DEFAULTPRINT(p, caplen);
}
return FIREWIRE_HDRLEN;
}
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