mirror of
https://github.com/the-tcpdump-group/tcpdump.git
synced 2024-12-18 06:14:06 +08:00
116 lines
3.8 KiB
C
116 lines
3.8 KiB
C
/*
|
|
* 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 */
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include "netdissect-stdinc.h"
|
|
|
|
#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";
|
|
if (caplen < sizeof (struct symantec_header)) {
|
|
ndo->ndo_ll_hdr_len += caplen;
|
|
nd_print_trunc(ndo);
|
|
return;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
return;
|
|
}
|