/* * 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 lintstatic const char rcsid[] _U_ =    "@(#) $Header: /tcpdump/master/tcpdump/print-hsrp.c,v 1.10 2005-05-06 07:56:52 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;};voidhsrp_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=\"");		if (fn_printn(hp->hsrp_authdata, sizeof(hp->hsrp_authdata),		    snapend)) {			printf("\"");			goto trunc;		}		printf("\"");	}	return;trunc:	printf("[|hsrp]");}