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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.
*/
#ifndef lint
static const char rcsid[] _U_ =
"@(#) $Header: /tcpdump/master/tcpdump/print-symantec.c,v 1.5 2005-07-07 01:22:21 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
#include <stdio.h>
#include <pcap.h>
#include "interface.h"
#include "addrtoname.h"
#include "ethertype.h"
#include "ether.h"
struct symantec_header {
u_int8_t stuff1[6];
u_int16_t ether_type;
u_int8_t stuff2[36];
};
static inline void
symantec_hdr_print(register const u_char *bp, u_int length)
{
register const struct symantec_header *sp;
u_int16_t etype;
sp = (const struct symantec_header *)bp;
etype = ntohs(sp->ether_type);
if (!qflag) {
if (etype <= ETHERMTU)
(void)printf("invalid ethertype %u", etype);
else
(void)printf("ethertype %s (0x%04x)",
tok2str(ethertype_values,"Unknown", etype),
etype);
} else {
if (etype <= ETHERMTU)
(void)printf("invalid ethertype %u", etype);
else
(void)printf("%s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", etype));
}
(void)printf(", 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
symantec_if_print(const struct pcap_pkthdr *h, const u_char *p)
{
u_int length = h->len;
u_int caplen = h->caplen;
struct symantec_header *sp;
u_short ether_type;
u_short extracted_ether_type;
if (caplen < sizeof (struct symantec_header)) {
printf("[|symantec]");
return caplen;
}
if (eflag)
symantec_hdr_print(p, length);
length -= sizeof (struct symantec_header);
caplen -= sizeof (struct symantec_header);
sp = (struct symantec_header *)p;
p += sizeof (struct symantec_header);
ether_type = ntohs(sp->ether_type);
if (ether_type <= ETHERMTU) {
/* ether_type not known, print raw packet */
if (!eflag)
symantec_hdr_print((u_char *)sp, length + sizeof (struct symantec_header));
if (!suppress_default_print)
default_print(p, caplen);
} else if (ether_encap_print(ether_type, p, length, caplen,
&extracted_ether_type) == 0) {
/* ether_type not known, print raw packet */
if (!eflag)
symantec_hdr_print((u_char *)sp, length + sizeof (struct symantec_header));
if (!suppress_default_print)
default_print(p, caplen);
}
return (sizeof (struct symantec_header));
}
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