1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/* RIP packet tracing
* Copyright 1991 Phil Karn, KA9Q
*
* Changes Copyright (c) 1993 Jeff White - N0POY, 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 University 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 COPYRIGHT HOLDER(S) ``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 COPYRIGHT HOLDER(S) 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.
*
* Rehack for RIP-2 (RFC1388) by N0POY 4/1993
*
* Beta release 11/10/93 V0.91
*
* 2/19/94 release V1.0
*
*/
#include <stdio.h>
#include "listen.h"
#define RIP_VERSION_2 2
#define RIP_VERSION_98 98
#define RIP_HEADER 4
#define RIP_ENTRY 20
#define RIP_AF_INET 2 /* IP Family */
#define RIPCMD_REQUEST 1 /* want info */
#define RIPCMD_RESPONSE 2 /* responding to request */
#define RIP98_ENTRY 6
static struct mask_struct {
unsigned int mask;
unsigned int width;
} mask_table[] = {
{
0xFFFFFFFF, 32}, {
0xFFFFFFFE, 31}, {
0xFFFFFFFC, 30}, {
0xFFFFFFF8, 29}, {
0xFFFFFFF0, 28}, {
0xFFFFFFE0, 27}, {
0xFFFFFFC0, 26}, {
0xFFFFFF80, 25}, {
0xFFFFFF00, 24}, {
0xFFFFFE00, 23}, {
0xFFFFFC00, 22}, {
0xFFFFF800, 21}, {
0xFFFFF000, 20}, {
0xFFFFE000, 19}, {
0xFFFFC000, 18}, {
0xFFFF8000, 17}, {
0xFFFF0000, 16}, {
0xFFFE0000, 15}, {
0xFFFC0000, 14}, {
0xFFF80000, 13}, {
0xFFF00000, 12}, {
0xFFE00000, 11}, {
0xFFC00000, 10}, {
0xFF800000, 9}, {
0xFF000000, 8}, {
0xFE000000, 7}, {
0xFC000000, 6}, {
0xF8000000, 5}, {
0xF0000000, 4}, {
0xE0000000, 3}, {
0xC0000000, 2}, {
0x80000000, 1}, {
0x00000000, 0},};
static unsigned int mask2width(unsigned int mask)
{
struct mask_struct *t;
for (t = mask_table; t->mask != 0; t++)
if (mask == t->mask)
return t->width;
return 0;
}
void rip_dump(unsigned char *data, int length)
{
int i;
int cmd;
int version;
int domain;
char ipaddmask[25];
lprintf(T_PROTOCOL, "RIP: ");
cmd = data[0];
version = data[1];
domain = get16(data + 2);
length -= RIP_HEADER;
data += RIP_HEADER;
switch (cmd) {
case RIPCMD_REQUEST:
lprintf(T_IPHDR, "REQUEST");
break;
case RIPCMD_RESPONSE:
lprintf(T_IPHDR, "RESPONSE");
break;
default:
lprintf(T_IPHDR, " cmd %u", cmd);
break;
}
switch (version) {
case RIP_VERSION_98: /* IPGATE * */
lprintf(T_IPHDR, " vers %u entries %u\n", version,
length / RIP98_ENTRY);
i = 0;
while (length >= RIP98_ENTRY) {
sprintf(ipaddmask, "%u.%u.%u.%u/%-2u", data[0],
data[1], data[2], data[3], data[4]);
lprintf(T_ADDR, "%-16s %-3u ", ipaddmask, data[5]);
if ((++i % 3) == 0)
lprintf(T_IPHDR, "\n");
length -= RIP98_ENTRY;
data += RIP98_ENTRY;
}
if ((i % 3) != 0)
lprintf(T_IPHDR, "\n");
break;
default:
lprintf(T_IPHDR, " vers %u entries %u domain %u:\n",
version, length / RIP_ENTRY, domain);
i = 0;
while (length >= RIP_ENTRY) {
if (get16(data + 0) != RIP_AF_INET) {
/* Skip non-IP addresses */
length -= RIP_ENTRY;
data += RIP_ENTRY;
continue;
}
if (version >= RIP_VERSION_2) {
sprintf(ipaddmask, "%u.%u.%u.%u/%-4d",
data[4], data[5], data[6], data[7],
mask2width(get32(data + 8)));
} else {
sprintf(ipaddmask, "%u.%u.%u.%u/??",
data[4], data[5], data[6],
data[7]);
}
lprintf(T_ADDR, "%-20s%-3u", ipaddmask,
get32(data + 16));
if ((++i % 3) == 0)
lprintf(T_IPHDR, "\n");
length -= RIP_ENTRY;
data += RIP_ENTRY;
}
if ((i % 3) != 0)
lprintf(T_IPHDR, "\n");
break;
}
}
|
