mirror of
https://github.com/the-tcpdump-group/tcpdump.git
synced 2024-11-24 18:43:39 +08:00
ea5736c8c6
Instead of having the Ethernet-type handler process the VLAN and Alteon jumbo frame Ethernet type values, process them in the Ethernet (and Linux cooked-mode) dissectors. This makes it easier for the right MAC addresses to be printed for those packets. As part of that, rename ether_encap_print() to ethertype_print() - it doesn't print encapsulated Ethernet frames, it prints payloads whose packet type is indicated by an Ethernet type field value - and remove the no-longer-needed "extracted Ethernet type" argument. That also lets us eliminate it from the SNAP print routine. Make ether_print() take a function, and an argument to pass to that function, as parameters, so that, for example, the ATM LANE printer can use it and put the LEC ID into the link-layer headeer printout.
121 lines
3.8 KiB
C
121 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.
|
|
*/
|
|
#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 "extract.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 = EXTRACT_16BITS(&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;
|
|
|
|
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 = EXTRACT_16BITS(&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 (ethertype_print(ether_type, p, length, caplen) == 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));
|
|
}
|