/* * 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 1.9.2.1 2005/05/06 07:57:17 guy Exp $"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #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=\""); if (fn_printn(hp->hsrp_authdata, sizeof(hp->hsrp_authdata), snapend)) { printf("\""); goto trunc; } printf("\""); } return; trunc: printf("[|hsrp]"); }