137 lines
4.4 KiB
C
137 lines
4.4 KiB
C
/*
|
|
* Copyright (C) 2001 Julian Cowley
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the project 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 BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
/* Cisco Hot Standby Router Protocol (HSRP). */
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] _U_ =
|
|
"@(#) $Header: /tcpdump/master/tcpdump/print-hsrp.c,v 1.7.2.2 2003/11/16 08:51:24 guy Exp $";
|
|
#endif
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <tcpdump-stdinc.h>
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "interface.h"
|
|
#include "addrtoname.h"
|
|
|
|
/* HSRP op code types. */
|
|
static const char *op_code_str[] = {
|
|
"hello",
|
|
"coup",
|
|
"resign"
|
|
};
|
|
|
|
/* HSRP states and associated names. */
|
|
static struct tok states[] = {
|
|
{ 0, "initial" },
|
|
{ 1, "learn" },
|
|
{ 2, "listen" },
|
|
{ 4, "speak" },
|
|
{ 8, "standby" },
|
|
{ 16, "active" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/*
|
|
* RFC 2281:
|
|
*
|
|
* 0 1 2 3
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Version | Op Code | State | Hellotime |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Holdtime | Priority | Group | Reserved |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Authentication Data |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Authentication Data |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Virtual IP Address |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
*/
|
|
|
|
#define HSRP_AUTH_SIZE 8
|
|
|
|
/* HSRP protocol header. */
|
|
struct hsrp {
|
|
u_int8_t hsrp_version;
|
|
u_int8_t hsrp_op_code;
|
|
u_int8_t hsrp_state;
|
|
u_int8_t hsrp_hellotime;
|
|
u_int8_t hsrp_holdtime;
|
|
u_int8_t hsrp_priority;
|
|
u_int8_t hsrp_group;
|
|
u_int8_t hsrp_reserved;
|
|
u_int8_t hsrp_authdata[HSRP_AUTH_SIZE];
|
|
struct in_addr hsrp_virtaddr;
|
|
};
|
|
|
|
void
|
|
hsrp_print(register const u_int8_t *bp, register u_int len)
|
|
{
|
|
struct hsrp *hp = (struct hsrp *) bp;
|
|
|
|
TCHECK(hp->hsrp_version);
|
|
printf("HSRPv%d", hp->hsrp_version);
|
|
if (hp->hsrp_version != 0)
|
|
return;
|
|
TCHECK(hp->hsrp_op_code);
|
|
printf("-");
|
|
printf("%s ", tok2strary(op_code_str, "unknown (%d)", hp->hsrp_op_code));
|
|
printf("%d: ", len);
|
|
TCHECK(hp->hsrp_state);
|
|
printf("state=%s ", tok2str(states, "Unknown (%d)", hp->hsrp_state));
|
|
TCHECK(hp->hsrp_group);
|
|
printf("group=%d ", hp->hsrp_group);
|
|
TCHECK(hp->hsrp_reserved);
|
|
if (hp->hsrp_reserved != 0) {
|
|
printf("[reserved=%d!] ", hp->hsrp_reserved);
|
|
}
|
|
TCHECK(hp->hsrp_virtaddr);
|
|
printf("addr=%s", ipaddr_string(&hp->hsrp_virtaddr));
|
|
if (vflag) {
|
|
printf(" hellotime=");
|
|
relts_print(hp->hsrp_hellotime);
|
|
printf(" holdtime=");
|
|
relts_print(hp->hsrp_holdtime);
|
|
printf(" priority=%d", hp->hsrp_priority);
|
|
printf(" auth=\"");
|
|
fn_printn(hp->hsrp_authdata, sizeof(hp->hsrp_authdata), NULL);
|
|
printf("\"");
|
|
}
|
|
return;
|
|
trunc:
|
|
printf("[|hsrp]");
|
|
}
|