Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / print-hsrp.c
CommitLineData
c8cf0f94
PA
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
33static const char rcsid[] _U_ =
34 "@(#) $Header: /tcpdump/master/tcpdump/print-hsrp.c,v 1.9.2.1 2005/05/06 07:57:17 guy Exp $";
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. */
49static const char *op_code_str[] = {
50 "hello",
51 "coup",
52 "resign"
53};
54
55/* HSRP states and associated names. */
56static struct tok states[] = {
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. */
87struct 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
100void
101hsrp_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;
138trunc:
139 printf("[|hsrp]");
140}