The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2000 William C. Fenner. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Kevin Steves <ks@hp.se> July 2000 |
| 6 | * Modified to: |
| 7 | * - print version, type string and packet length |
| 8 | * - print IP address count if > 1 (-v) |
| 9 | * - verify checksum (-v) |
| 10 | * - print authentication string (-v) |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that: (1) source code |
| 14 | * distributions retain the above copyright notice and this paragraph |
| 15 | * in its entirety, and (2) distributions including binary code include |
| 16 | * the above copyright notice and this paragraph in its entirety in |
| 17 | * the documentation or other materials provided with the distribution. |
| 18 | * The name of William C. Fenner may not be used to endorse or |
| 19 | * promote products derived from this software without specific prior |
| 20 | * written permission. THIS SOFTWARE IS PROVIDED ``AS IS'' AND |
| 21 | * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT |
| 22 | * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 23 | * FOR A PARTICULAR PURPOSE. |
| 24 | */ |
| 25 | |
| 26 | #ifndef lint |
| 27 | static const char rcsid[] _U_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 28 | "@(#) $Header: /tcpdump/master/tcpdump/print-vrrp.c,v 1.10 2005-05-06 07:56:54 guy Exp $"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 29 | #endif |
| 30 | |
| 31 | #ifdef HAVE_CONFIG_H |
| 32 | #include "config.h" |
| 33 | #endif |
| 34 | |
| 35 | #include <tcpdump-stdinc.h> |
| 36 | |
| 37 | #include <stdio.h> |
| 38 | #include <stdlib.h> |
| 39 | |
| 40 | #include "interface.h" |
| 41 | #include "extract.h" |
| 42 | #include "addrtoname.h" |
| 43 | |
| 44 | /* |
| 45 | * RFC 2338: |
| 46 | * 0 1 2 3 |
| 47 | * 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 |
| 48 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 49 | * |Version| Type | Virtual Rtr ID| Priority | Count IP Addrs| |
| 50 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 51 | * | Auth Type | Adver Int | Checksum | |
| 52 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 53 | * | IP Address (1) | |
| 54 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 55 | * | . | |
| 56 | * | . | |
| 57 | * | . | |
| 58 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 59 | * | IP Address (n) | |
| 60 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 61 | * | Authentication Data (1) | |
| 62 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 63 | * | Authentication Data (2) | |
| 64 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 65 | */ |
| 66 | |
| 67 | /* Type */ |
| 68 | #define VRRP_TYPE_ADVERTISEMENT 1 |
| 69 | |
| 70 | static const struct tok type2str[] = { |
| 71 | { VRRP_TYPE_ADVERTISEMENT, "Advertisement" }, |
| 72 | { 0, NULL } |
| 73 | }; |
| 74 | |
| 75 | /* Auth Type */ |
| 76 | #define VRRP_AUTH_NONE 0 |
| 77 | #define VRRP_AUTH_SIMPLE 1 |
| 78 | #define VRRP_AUTH_AH 2 |
| 79 | |
| 80 | static const struct tok auth2str[] = { |
| 81 | { VRRP_AUTH_NONE, "none" }, |
| 82 | { VRRP_AUTH_SIMPLE, "simple" }, |
| 83 | { VRRP_AUTH_AH, "ah" }, |
| 84 | { 0, NULL } |
| 85 | }; |
| 86 | |
| 87 | void |
| 88 | vrrp_print(register const u_char *bp, register u_int len, int ttl) |
| 89 | { |
| 90 | int version, type, auth_type; |
| 91 | const char *type_s; |
| 92 | |
| 93 | TCHECK(bp[0]); |
| 94 | version = (bp[0] & 0xf0) >> 4; |
| 95 | type = bp[0] & 0x0f; |
| 96 | type_s = tok2str(type2str, "unknown type (%u)", type); |
| 97 | printf("VRRPv%u, %s", version, type_s); |
| 98 | if (ttl != 255) |
| 99 | printf(", (ttl %u)", ttl); |
| 100 | if (version != 2 || type != VRRP_TYPE_ADVERTISEMENT) |
| 101 | return; |
| 102 | TCHECK(bp[2]); |
| 103 | printf(", vrid %u, prio %u", bp[1], bp[2]); |
| 104 | TCHECK(bp[5]); |
| 105 | auth_type = bp[4]; |
| 106 | printf(", authtype %s", tok2str(auth2str, NULL, auth_type)); |
| 107 | printf(", intvl %us, length %u", bp[5],len); |
| 108 | if (vflag) { |
| 109 | int naddrs = bp[3]; |
| 110 | int i; |
| 111 | char c; |
| 112 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 113 | if (TTEST2(bp[0], len)) { |
| 114 | struct cksum_vec vec[1]; |
| 115 | |
| 116 | vec[0].ptr = bp; |
| 117 | vec[0].len = len; |
| 118 | if (in_cksum(vec, 1)) |
| 119 | printf(", (bad vrrp cksum %x)", |
| 120 | EXTRACT_16BITS(&bp[6])); |
| 121 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 122 | printf(", addrs"); |
| 123 | if (naddrs > 1) |
| 124 | printf("(%d)", naddrs); |
| 125 | printf(":"); |
| 126 | c = ' '; |
| 127 | bp += 8; |
| 128 | for (i = 0; i < naddrs; i++) { |
| 129 | TCHECK(bp[3]); |
| 130 | printf("%c%s", c, ipaddr_string(bp)); |
| 131 | c = ','; |
| 132 | bp += 4; |
| 133 | } |
| 134 | if (auth_type == VRRP_AUTH_SIMPLE) { /* simple text password */ |
| 135 | TCHECK(bp[7]); |
| 136 | printf(" auth \""); |
| 137 | if (fn_printn(bp, 8, snapend)) { |
| 138 | printf("\""); |
| 139 | goto trunc; |
| 140 | } |
| 141 | printf("\""); |
| 142 | } |
| 143 | } |
| 144 | return; |
| 145 | trunc: |
| 146 | printf("[|vrrp]"); |
| 147 | } |