| /* |
| * 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[] = |
| "@(#) $Header: /tcpdump/master/tcpdump/print-hsrp.c,v 1.1 2001-09-17 06:22:33 guy Exp $"; |
| #endif |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <sys/types.h> |
| |
| #include <stdio.h> |
| #include <netinet/in.h> |
| |
| #include "interface.h" |
| #include "addrtoname.h" |
| |
| /* HSRP op code types. */ |
| static char *op_code_str[] = { |
| "hello", |
| "coup", |
| "resign" |
| }; |
| |
| /* HSRP states and associated names. */ |
| static struct { |
| u_int value; |
| char *str; |
| } states[] = { |
| { 0, "initial" }, |
| { 1, "learn" }, |
| { 2, "listen" }, |
| { 4, "speak" }, |
| { 8, "standby" }, |
| { 16, "active" } |
| }; |
| |
| /* |
| * 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_char hsrp_version; |
| u_char hsrp_op_code; |
| u_char hsrp_state; |
| u_char hsrp_hellotime; |
| u_char hsrp_holdtime; |
| u_char hsrp_priority; |
| u_char hsrp_group; |
| u_char hsrp_reserved; |
| u_char hsrp_authdata[HSRP_AUTH_SIZE]; |
| struct in_addr hsrp_virtaddr; |
| }; |
| |
| void |
| hsrp_print(register const u_char *bp, register u_int len) |
| { |
| int op_code, state; |
| struct hsrp *hp = (struct hsrp *) bp; |
| int i; |
| |
| TCHECK(hp->hsrp_version); |
| printf("HSRPv%d", hp->hsrp_version); |
| if (hp->hsrp_version != 0) |
| return; |
| TCHECK(hp->hsrp_op_code); |
| printf("-"); |
| op_code = hp->hsrp_op_code; |
| if (op_code < (sizeof(op_code_str) / sizeof(op_code_str[0]))) { |
| printf("%s ", op_code_str[op_code]); |
| } else { |
| printf("unknown (%d) ", op_code); |
| } |
| printf("%d: ", len); |
| TCHECK(hp->hsrp_state); |
| state = hp->hsrp_state; |
| for (i = 0; i < (sizeof(states) / sizeof(states[0])); i++) { |
| if (state == states[i].value) |
| break; |
| } |
| if (i < (sizeof(states) / sizeof(states[0]))) { |
| printf("state=%s ", states[i].str); |
| } else { |
| printf("state=Unknown (%d) ", 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); |
| } |
| TCHECK2(hp->hsrp_virtaddr, sizeof(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]"); |
| } |