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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.
*/
/* \summary: Symantec Enterprise Firewall printer */
#include <config.h>
#include "netdissect-stdinc.h"
#define ND_LONGJMP_FROM_TCHECK
#include "netdissect.h"
#include "extract.h"
#include "ethertype.h"
struct symantec_header {
nd_byte stuff1[6];
nd_uint16_t ether_type;
nd_byte stuff2[36];
};
static void
symantec_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length)
{
const struct symantec_header *sp;
uint16_t etype;
sp = (const struct symantec_header *)bp;
etype = GET_BE_U_2(sp->ether_type);
if (!ndo->ndo_qflag) {
if (etype <= MAX_ETHERNET_LENGTH_VAL)
ND_PRINT("invalid ethertype %u", etype);
else
ND_PRINT("ethertype %s (0x%04x)",
tok2str(ethertype_values,"Unknown", etype),
etype);
} else {
if (etype <= MAX_ETHERNET_LENGTH_VAL)
ND_PRINT("invalid ethertype %u", etype);
else
ND_PRINT("%s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", etype));
}
ND_PRINT(", 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.
*/
void
symantec_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
{
u_int length = h->len;
u_int caplen = h->caplen;
const struct symantec_header *sp;
u_short ether_type;
ndo->ndo_protocol = "symantec";
ND_TCHECK_LEN(p, sizeof(struct symantec_header));
ndo->ndo_ll_hdr_len += sizeof (struct symantec_header);
if (ndo->ndo_eflag)
symantec_hdr_print(ndo, p, length);
length -= sizeof (struct symantec_header);
caplen -= sizeof (struct symantec_header);
sp = (const struct symantec_header *)p;
p += sizeof (struct symantec_header);
ether_type = GET_BE_U_2(sp->ether_type);
if (ether_type <= MAX_ETHERNET_LENGTH_VAL) {
/* ether_type not known, print raw packet */
if (!ndo->ndo_eflag)
symantec_hdr_print(ndo, (const u_char *)sp, length + sizeof (struct symantec_header));
if (!ndo->ndo_suppress_default_print)
ND_DEFAULTPRINT(p, caplen);
} else if (ethertype_print(ndo, ether_type, p, length, caplen, NULL, NULL) == 0) {
/* ether_type not known, print raw packet */
if (!ndo->ndo_eflag)
symantec_hdr_print(ndo, (const u_char *)sp, length + sizeof (struct symantec_header));
if (!ndo->ndo_suppress_default_print)
ND_DEFAULTPRINT(p, caplen);
}
}
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