1 |
|
|
/* $OpenBSD: print-hsrp.c,v 1.5 2015/11/16 00:16:39 mmcc Exp $ */ |
2 |
|
|
|
3 |
|
|
/* |
4 |
|
|
* Copyright (C) 2001 Julian Cowley |
5 |
|
|
* All rights reserved. |
6 |
|
|
* |
7 |
|
|
* Redistribution and use in source and binary forms, with or without |
8 |
|
|
* modification, are permitted provided that the following conditions |
9 |
|
|
* are met: |
10 |
|
|
* 1. Redistributions of source code must retain the above copyright |
11 |
|
|
* notice, this list of conditions and the following disclaimer. |
12 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
13 |
|
|
* notice, this list of conditions and the following disclaimer in the |
14 |
|
|
* documentation and/or other materials provided with the distribution. |
15 |
|
|
* 3. Neither the name of the project nor the names of its contributors |
16 |
|
|
* may be used to endorse or promote products derived from this software |
17 |
|
|
* without specific prior written permission. |
18 |
|
|
* |
19 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
20 |
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
21 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
22 |
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
23 |
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
24 |
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
25 |
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
26 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
27 |
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
28 |
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
29 |
|
|
* SUCH DAMAGE. |
30 |
|
|
*/ |
31 |
|
|
|
32 |
|
|
/* Cisco Hot Standby Router Protocol (HSRP). */ |
33 |
|
|
|
34 |
|
|
#ifdef HAVE_CONFIG_H |
35 |
|
|
#include "config.h" |
36 |
|
|
#endif |
37 |
|
|
|
38 |
|
|
#include <sys/types.h> |
39 |
|
|
|
40 |
|
|
#include <stdio.h> |
41 |
|
|
#include <netinet/in.h> |
42 |
|
|
|
43 |
|
|
#include "interface.h" |
44 |
|
|
#include "addrtoname.h" |
45 |
|
|
|
46 |
|
|
/* HSRP op code types. */ |
47 |
|
|
static const char *op_code_str[] = { |
48 |
|
|
"hello", |
49 |
|
|
"coup", |
50 |
|
|
"resign" |
51 |
|
|
}; |
52 |
|
|
|
53 |
|
|
/* HSRP states and associated names. */ |
54 |
|
|
static struct tok states[] = { |
55 |
|
|
{ 0, "initial" }, |
56 |
|
|
{ 1, "learn" }, |
57 |
|
|
{ 2, "listen" }, |
58 |
|
|
{ 4, "speak" }, |
59 |
|
|
{ 8, "standby" }, |
60 |
|
|
{ 16, "active" }, |
61 |
|
|
{ 0, NULL } |
62 |
|
|
}; |
63 |
|
|
|
64 |
|
|
/* |
65 |
|
|
* RFC 2281: |
66 |
|
|
* |
67 |
|
|
* 0 1 2 3 |
68 |
|
|
* 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 |
69 |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
70 |
|
|
* | Version | Op Code | State | Hellotime | |
71 |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
72 |
|
|
* | Holdtime | Priority | Group | Reserved | |
73 |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
74 |
|
|
* | Authentication Data | |
75 |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
76 |
|
|
* | Authentication Data | |
77 |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
78 |
|
|
* | Virtual IP Address | |
79 |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
80 |
|
|
*/ |
81 |
|
|
|
82 |
|
|
#define HSRP_AUTH_SIZE 8 |
83 |
|
|
|
84 |
|
|
/* HSRP protocol header. */ |
85 |
|
|
struct hsrp { |
86 |
|
|
u_char hsrp_version; |
87 |
|
|
u_char hsrp_op_code; |
88 |
|
|
u_char hsrp_state; |
89 |
|
|
u_char hsrp_hellotime; |
90 |
|
|
u_char hsrp_holdtime; |
91 |
|
|
u_char hsrp_priority; |
92 |
|
|
u_char hsrp_group; |
93 |
|
|
u_char hsrp_reserved; |
94 |
|
|
u_char hsrp_authdata[HSRP_AUTH_SIZE]; |
95 |
|
|
struct in_addr hsrp_virtaddr; |
96 |
|
|
}; |
97 |
|
|
|
98 |
|
|
void |
99 |
|
|
hsrp_print(const u_char *bp, u_int len) |
100 |
|
|
{ |
101 |
|
|
struct hsrp *hp = (struct hsrp *) bp; |
102 |
|
|
|
103 |
|
|
TCHECK(hp->hsrp_version); |
104 |
|
|
printf("HSRPv%d", hp->hsrp_version); |
105 |
|
|
if (hp->hsrp_version != 0) |
106 |
|
|
return; |
107 |
|
|
TCHECK(hp->hsrp_op_code); |
108 |
|
|
printf("-"); |
109 |
|
|
if (hp->hsrp_op_code >= sizeof(op_code_str)/sizeof(*op_code_str)) |
110 |
|
|
printf("unknown (%d) ", hp->hsrp_op_code); |
111 |
|
|
else |
112 |
|
|
printf("%s ", op_code_str[hp->hsrp_op_code]); |
113 |
|
|
printf("%d: ", len); |
114 |
|
|
TCHECK(hp->hsrp_state); |
115 |
|
|
printf("state=%s ", tok2str(states, "Unknown (%d)", hp->hsrp_state)); |
116 |
|
|
TCHECK(hp->hsrp_group); |
117 |
|
|
printf("group=%d ", hp->hsrp_group); |
118 |
|
|
TCHECK(hp->hsrp_reserved); |
119 |
|
|
if (hp->hsrp_reserved != 0) { |
120 |
|
|
printf("[reserved=%d!] ", hp->hsrp_reserved); |
121 |
|
|
} |
122 |
|
|
TCHECK2(hp->hsrp_virtaddr, sizeof(hp->hsrp_virtaddr)); |
123 |
|
|
printf("addr=%s", ipaddr_string(&hp->hsrp_virtaddr)); |
124 |
|
|
if (vflag) { |
125 |
|
|
printf(" hellotime="); |
126 |
|
|
relts_print(hp->hsrp_hellotime); |
127 |
|
|
printf(" holdtime="); |
128 |
|
|
relts_print(hp->hsrp_holdtime); |
129 |
|
|
printf(" priority=%d", hp->hsrp_priority); |
130 |
|
|
printf(" auth=\""); |
131 |
|
|
fn_printn(hp->hsrp_authdata, sizeof(hp->hsrp_authdata), NULL); |
132 |
|
|
printf("\""); |
133 |
|
|
} |
134 |
|
|
return; |
135 |
|
|
trunc: |
136 |
|
|
printf("[|hsrp]"); |
137 |
|
|
} |