Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / print-rip.c
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c8cf0f94
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1/*
2 * Copyright (c) 1989, 1990, 1991, 1993, 1994, 1996
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22#ifndef lint
23static const char rcsid[] _U_ =
24 "@(#) $Header: /tcpdump/master/tcpdump/print-rip.c,v 1.57 2003/11/16 09:36:34 guy Exp $ (LBL)";
25#endif
26
27#ifdef HAVE_CONFIG_H
28#include "config.h"
29#endif
30
31#include <tcpdump-stdinc.h>
32
33#include <stdio.h>
34#include <string.h>
35
36#include "interface.h"
37#include "addrtoname.h"
38#include "extract.h" /* must come after interface.h */
39
40struct rip {
41 u_int8_t rip_cmd; /* request/response */
42 u_int8_t rip_vers; /* protocol version # */
43 u_int8_t unused[2]; /* unused */
44};
45
46#define RIPCMD_REQUEST 1 /* want info */
47#define RIPCMD_RESPONSE 2 /* responding to request */
48#define RIPCMD_TRACEON 3 /* turn tracing on */
49#define RIPCMD_TRACEOFF 4 /* turn it off */
50#define RIPCMD_POLL 5 /* want info from everybody */
51#define RIPCMD_POLLENTRY 6 /* poll for entry */
52
53static const struct tok rip_cmd_values[] = {
54 { RIPCMD_REQUEST, "Request" },
55 { RIPCMD_RESPONSE, "Response" },
56 { RIPCMD_TRACEON, "Trace on" },
57 { RIPCMD_TRACEOFF, "Trace off" },
58 { RIPCMD_POLL, "Poll" },
59 { RIPCMD_POLLENTRY, "Poll Entry" },
60 { 0, NULL}
61};
62
63#define RIP_AUTHLEN 16
64#define RIP_ROUTELEN 20
65
66/*
67 * rfc 1723
68 *
69 * 0 1 2 3 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 * | Command (1) | Version (1) | unused |
73 * +---------------+---------------+-------------------------------+
74 * | Address Family Identifier (2) | Route Tag (2) |
75 * +-------------------------------+-------------------------------+
76 * | IP Address (4) |
77 * +---------------------------------------------------------------+
78 * | Subnet Mask (4) |
79 * +---------------------------------------------------------------+
80 * | Next Hop (4) |
81 * +---------------------------------------------------------------+
82 * | Metric (4) |
83 * +---------------------------------------------------------------+
84 *
85 */
86
87struct rip_netinfo {
88 u_int16_t rip_family;
89 u_int16_t rip_tag;
90 u_int32_t rip_dest;
91 u_int32_t rip_dest_mask;
92 u_int32_t rip_router;
93 u_int32_t rip_metric; /* cost of route */
94};
95
96static void
97rip_entry_print_v1(register const struct rip_netinfo *ni)
98{
99 register u_short family;
100
101 /* RFC 1058 */
102 family = EXTRACT_16BITS(&ni->rip_family);
103 if (family != AF_INET) {
104 printf("\n\t AFI: %u:", family);
105 print_unknown_data((u_int8_t *)&ni->rip_family,"\n\t ",RIP_ROUTELEN);
106 return;
107 }
108 if (EXTRACT_16BITS(&ni->rip_tag) ||
109 EXTRACT_32BITS(&ni->rip_dest_mask) ||
110 EXTRACT_32BITS(&ni->rip_router)) {
111 /* MBZ fields not zero */
112 print_unknown_data((u_int8_t *)&ni->rip_family,"\n\t ",RIP_ROUTELEN);
113 return;
114 } /* AF_INET */
115 printf("\n\t %s, metric: %u",
116 ipaddr_string(&ni->rip_dest),
117 EXTRACT_32BITS(&ni->rip_metric));
118}
119
120static void
121rip_entry_print_v2(register const struct rip_netinfo *ni)
122{
123 register u_char *p;
124 register u_short family;
125 u_char buf[RIP_AUTHLEN];
126
127 family = EXTRACT_16BITS(&ni->rip_family);
128 if (family == 0xFFFF) { /* 16 bytes authentication ? */
129 if (EXTRACT_16BITS(&ni->rip_tag) == 2) { /* simple text authentication ? */
130 memcpy(buf, &ni->rip_dest, sizeof(buf));
131 buf[sizeof(buf)-1] = '\0';
132 for (p = buf; *p; p++) {
133 if (!isprint(*p))
134 break;
135 }
136 printf("\n\t Simple Text Authentication data: %s", buf);
137 } else {
138 printf("\n\t Unknown (%u) Authentication data:",
139 EXTRACT_16BITS(&ni->rip_tag));
140 print_unknown_data((u_int8_t *)&ni->rip_dest,"\n\t ",RIP_AUTHLEN);
141 }
142 } else if (family != AF_INET) {
143 printf("\n\t AFI: %u", family);
144 print_unknown_data((u_int8_t *)&ni->rip_tag,"\n\t ",RIP_ROUTELEN-2);
145 return;
146 } else { /* AF_INET */
147 printf("\n\t AFI: IPv4: %15s/%-2d, tag 0x%04x, metric: %u, next-hop: ",
148 ipaddr_string(&ni->rip_dest),
149 mask2plen(EXTRACT_32BITS(&ni->rip_dest_mask)),
150 EXTRACT_16BITS(&ni->rip_tag),
151 EXTRACT_32BITS(&ni->rip_metric));
152 if (EXTRACT_32BITS(&ni->rip_router))
153 printf("%s", ipaddr_string(&ni->rip_router));
154 else
155 printf("self");
156 }
157}
158
159void
160rip_print(const u_char *dat, u_int length)
161{
162 register const struct rip *rp;
163 register const struct rip_netinfo *ni;
164 register u_int i, j;
165 register int trunc;
166
167 if (snapend < dat) {
168 printf(" [|rip]");
169 return;
170 }
171 i = snapend - dat;
172 if (i > length)
173 i = length;
174 if (i < sizeof(*rp)) {
175 printf(" [|rip]");
176 return;
177 }
178 i -= sizeof(*rp);
179
180 rp = (struct rip *)dat;
181
182 printf("%sRIPv%u",
183 (vflag >= 1) ? "\n\t" : "",
184 rp->rip_vers);
185
186 switch (rp->rip_vers) {
187 case 0:
188 /*
189 * RFC 1058.
190 *
191 * XXX - RFC 1058 says
192 *
193 * 0 Datagrams whose version number is zero are to be ignored.
194 * These are from a previous version of the protocol, whose
195 * packet format was machine-specific.
196 *
197 * so perhaps we should just dump the packet, in hex.
198 */
199 print_unknown_data((u_int8_t *)&rp->rip_cmd,"\n\t",length);
200 break;
201 default:
202 /* dump version and lets see if we know the commands name*/
203 printf(", %s, length: %u",
204 tok2str(rip_cmd_values,
205 "unknown command (%u)",
206 rp->rip_cmd),
207 length);
208
209 if (vflag < 1)
210 return;
211
212 switch (rp->rip_cmd) {
213 case RIPCMD_RESPONSE:
214 j = length / sizeof(*ni);
215 printf(", routes: %u",j);
216 trunc = (i / sizeof(*ni)) != j;
217 ni = (struct rip_netinfo *)(rp + 1);
218 for (; i >= sizeof(*ni); ++ni) {
219 if (rp->rip_vers == 1)
220 rip_entry_print_v1(ni);
221 else if (rp->rip_vers == 2)
222 rip_entry_print_v2(ni);
223 else
224 break;
225 i -= sizeof(*ni);
226 }
227 if (trunc)
228 printf("[|rip]");
229 break;
230
231 case RIPCMD_REQUEST:
232 case RIPCMD_TRACEOFF:
233 case RIPCMD_POLL:
234 case RIPCMD_POLLENTRY:
235 break;
236
237 case RIPCMD_TRACEON:
238 /* fall through */
239 default:
240 if (vflag <= 1) {
241 if(!print_unknown_data((u_int8_t *)rp,"\n\t",length))
242 return;
243 }
244 break;
245 }
246 /* do we want to see an additionally hexdump ? */
247 if (vflag> 1) {
248 if(!print_unknown_data((u_int8_t *)rp,"\n\t",length))
249 return;
250 }
251 }
252}
253
254