mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
|
/* $OpenBSD: print-carp.c,v 1.6 2009/10/27 23:59:55 deraadt Exp $ */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright (c) 2000 William C. Fenner.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Kevin Steves <ks@hp.se> July 2000
|
||
|
|
* Modified to:
|
||
|
|
* - print version, type string and packet length
|
||
|
|
* - print IP address count if > 1 (-v)
|
||
|
|
* - verify checksum (-v)
|
||
|
|
* - print authentication string (-v)
|
||
|
|
*
|
||
|
|
* Copyright (c) 2011 Advanced Computing Technologies
|
||
|
|
* George V. Neille-Neil
|
||
|
|
*
|
||
|
|
* Modified to:
|
||
|
|
* - work correctly with CARP
|
||
|
|
* - compile into the latest tcpdump
|
||
|
|
* - print out the counter
|
||
|
|
*
|
||
|
|
* 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, and (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.
|
||
|
|
* The name of William C. Fenner may not 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 <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
#include <netinet/in.h>
|
||
|
|
|
||
|
|
#include "interface.h"
|
||
|
|
#include "extract.h"
|
||
|
|
#include "addrtoname.h"
|
||
|
|
|
||
|
|
void
|
||
|
|
carp_print(register const u_char *bp, register u_int len, int ttl)
|
||
|
|
{
|
||
|
|
int version, type;
|
||
|
|
const char *type_s;
|
||
|
|
|
||
|
|
TCHECK(bp[0]);
|
||
|
|
version = (bp[0] & 0xf0) >> 4;
|
||
|
|
type = bp[0] & 0x0f;
|
||
|
|
if (type == 1)
|
||
|
|
type_s = "advertise";
|
||
|
|
else
|
||
|
|
type_s = "unknown";
|
||
|
|
printf("CARPv%d-%s %d: ", version, type_s, len);
|
||
|
|
if (ttl != 255)
|
||
|
|
printf("[ttl=%d!] ", ttl);
|
||
|
|
if (version != 2 || type != 1)
|
||
|
|
return;
|
||
|
|
TCHECK(bp[2]);
|
||
|
|
TCHECK(bp[5]);
|
||
|
|
printf("vhid=%d advbase=%d advskew=%d authlen=%d ",
|
||
|
|
bp[1], bp[5], bp[2], bp[3]);
|
||
|
|
if (vflag) {
|
||
|
|
struct cksum_vec vec[1];
|
||
|
|
vec[0].ptr = (const u_int8_t *)bp;
|
||
|
|
vec[0].len = len;
|
||
|
|
if (TTEST2(bp[0], len) && in_cksum(vec, 1))
|
||
|
|
printf(" (bad carp cksum %x!)",
|
||
|
|
EXTRACT_16BITS(&bp[6]));
|
||
|
|
}
|
||
|
|
printf("counter=%" PRIu64, EXTRACT_64BITS(&bp[8]));
|
||
|
|
|
||
|
|
return;
|
||
|
|
trunc:
|
||
|
|
printf("[|carp]");
|
||
|
|
}
|