The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2001 Julian Cowley |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. Neither the name of the project nor the names of its contributors |
| 14 | * may be used to endorse or promote products derived from this software |
| 15 | * without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | /* Cisco Hot Standby Router Protocol (HSRP). */ |
| 31 | |
| 32 | #ifndef lint |
| 33 | static const char rcsid[] _U_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 34 | "@(#) $Header: /tcpdump/master/tcpdump/print-hsrp.c,v 1.10 2005-05-06 07:56:52 guy Exp $"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 35 | #endif |
| 36 | |
| 37 | #ifdef HAVE_CONFIG_H |
| 38 | #include "config.h" |
| 39 | #endif |
| 40 | |
| 41 | #include <tcpdump-stdinc.h> |
| 42 | |
| 43 | #include <stdio.h> |
| 44 | |
| 45 | #include "interface.h" |
| 46 | #include "addrtoname.h" |
| 47 | |
| 48 | /* HSRP op code types. */ |
| 49 | static const char *op_code_str[] = { |
| 50 | "hello", |
| 51 | "coup", |
| 52 | "resign" |
| 53 | }; |
| 54 | |
| 55 | /* HSRP states and associated names. */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 56 | static const struct tok states[] = { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 57 | { 0, "initial" }, |
| 58 | { 1, "learn" }, |
| 59 | { 2, "listen" }, |
| 60 | { 4, "speak" }, |
| 61 | { 8, "standby" }, |
| 62 | { 16, "active" }, |
| 63 | { 0, NULL } |
| 64 | }; |
| 65 | |
| 66 | /* |
| 67 | * RFC 2281: |
| 68 | * |
| 69 | * 0 1 2 3 |
| 70 | * 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 |
| 71 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 72 | * | Version | Op Code | State | Hellotime | |
| 73 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 74 | * | Holdtime | Priority | Group | Reserved | |
| 75 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 76 | * | Authentication Data | |
| 77 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 78 | * | Authentication Data | |
| 79 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 80 | * | Virtual IP Address | |
| 81 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 82 | */ |
| 83 | |
| 84 | #define HSRP_AUTH_SIZE 8 |
| 85 | |
| 86 | /* HSRP protocol header. */ |
| 87 | struct hsrp { |
| 88 | u_int8_t hsrp_version; |
| 89 | u_int8_t hsrp_op_code; |
| 90 | u_int8_t hsrp_state; |
| 91 | u_int8_t hsrp_hellotime; |
| 92 | u_int8_t hsrp_holdtime; |
| 93 | u_int8_t hsrp_priority; |
| 94 | u_int8_t hsrp_group; |
| 95 | u_int8_t hsrp_reserved; |
| 96 | u_int8_t hsrp_authdata[HSRP_AUTH_SIZE]; |
| 97 | struct in_addr hsrp_virtaddr; |
| 98 | }; |
| 99 | |
| 100 | void |
| 101 | hsrp_print(register const u_int8_t *bp, register u_int len) |
| 102 | { |
| 103 | struct hsrp *hp = (struct hsrp *) bp; |
| 104 | |
| 105 | TCHECK(hp->hsrp_version); |
| 106 | printf("HSRPv%d", hp->hsrp_version); |
| 107 | if (hp->hsrp_version != 0) |
| 108 | return; |
| 109 | TCHECK(hp->hsrp_op_code); |
| 110 | printf("-"); |
| 111 | printf("%s ", tok2strary(op_code_str, "unknown (%d)", hp->hsrp_op_code)); |
| 112 | printf("%d: ", len); |
| 113 | TCHECK(hp->hsrp_state); |
| 114 | printf("state=%s ", tok2str(states, "Unknown (%d)", hp->hsrp_state)); |
| 115 | TCHECK(hp->hsrp_group); |
| 116 | printf("group=%d ", hp->hsrp_group); |
| 117 | TCHECK(hp->hsrp_reserved); |
| 118 | if (hp->hsrp_reserved != 0) { |
| 119 | printf("[reserved=%d!] ", hp->hsrp_reserved); |
| 120 | } |
| 121 | TCHECK(hp->hsrp_virtaddr); |
| 122 | printf("addr=%s", ipaddr_string(&hp->hsrp_virtaddr)); |
| 123 | if (vflag) { |
| 124 | printf(" hellotime="); |
| 125 | relts_print(hp->hsrp_hellotime); |
| 126 | printf(" holdtime="); |
| 127 | relts_print(hp->hsrp_holdtime); |
| 128 | printf(" priority=%d", hp->hsrp_priority); |
| 129 | printf(" auth=\""); |
| 130 | if (fn_printn(hp->hsrp_authdata, sizeof(hp->hsrp_authdata), |
| 131 | snapend)) { |
| 132 | printf("\""); |
| 133 | goto trunc; |
| 134 | } |
| 135 | printf("\""); |
| 136 | } |
| 137 | return; |
| 138 | trunc: |
| 139 | printf("[|hsrp]"); |
| 140 | } |