Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / print-ip6.c
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1/*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994
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_ =
825e8fa1 24 "@(#) $Header: /tcpdump/master/tcpdump/print-ip6.c,v 1.47.2.5 2007/09/21 07:07:52 hannes Exp $";
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25#endif
26
27#ifdef HAVE_CONFIG_H
28#include "config.h"
29#endif
30
31#ifdef INET6
32
33#include <tcpdump-stdinc.h>
34
35#include <stdio.h>
36#include <stdlib.h>
37#include <string.h>
38
39#include "interface.h"
40#include "addrtoname.h"
41#include "extract.h"
42
43#include "ip6.h"
44#include "ipproto.h"
45
46/*
47 * print an IP6 datagram.
48 */
49void
50ip6_print(register const u_char *bp, register u_int length)
51{
52 register const struct ip6_hdr *ip6;
53 register int advance;
54 u_int len;
55 const u_char *ipend;
56 register const u_char *cp;
57 register u_int payload_len;
58 int nh;
59 int fragmented = 0;
60 u_int flow;
61
62 ip6 = (const struct ip6_hdr *)bp;
63
64 TCHECK(*ip6);
65 if (length < sizeof (struct ip6_hdr)) {
66 (void)printf("truncated-ip6 %u", length);
67 return;
68 }
69
70 if (!eflag)
71 printf("IP6 ");
72
73 payload_len = EXTRACT_16BITS(&ip6->ip6_plen);
74 len = payload_len + sizeof(struct ip6_hdr);
75 if (length < len)
76 (void)printf("truncated-ip6 - %u bytes missing!",
77 len - length);
78
79 if (vflag) {
80 flow = EXTRACT_32BITS(&ip6->ip6_flow);
81 printf("(");
82#if 0
83 /* rfc1883 */
84 if (flow & 0x0f000000)
85 (void)printf("pri 0x%02x, ", (flow & 0x0f000000) >> 24);
86 if (flow & 0x00ffffff)
87 (void)printf("flowlabel 0x%06x, ", flow & 0x00ffffff);
88#else
89 /* RFC 2460 */
90 if (flow & 0x0ff00000)
91 (void)printf("class 0x%02x, ", (flow & 0x0ff00000) >> 20);
92 if (flow & 0x000fffff)
93 (void)printf("flowlabel 0x%05x, ", flow & 0x000fffff);
94#endif
95
825e8fa1 96 (void)printf("hlim %u, next-header %s (%u) payload length: %u) ",
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97 ip6->ip6_hlim,
98 tok2str(ipproto_values,"unknown",ip6->ip6_nxt),
99 ip6->ip6_nxt,
100 payload_len);
101 }
102
103 /*
104 * Cut off the snapshot length to the end of the IP payload.
105 */
106 ipend = bp + len;
107 if (ipend < snapend)
108 snapend = ipend;
109
110 cp = (const u_char *)ip6;
111 advance = sizeof(struct ip6_hdr);
112 nh = ip6->ip6_nxt;
113 while (cp < snapend && advance > 0) {
114 cp += advance;
115 len -= advance;
116
117 if (cp == (const u_char *)(ip6 + 1) &&
118 nh != IPPROTO_TCP && nh != IPPROTO_UDP &&
119 nh != IPPROTO_DCCP && nh != IPPROTO_SCTP) {
120 (void)printf("%s > %s: ", ip6addr_string(&ip6->ip6_src),
121 ip6addr_string(&ip6->ip6_dst));
122 }
123
124 switch (nh) {
125 case IPPROTO_HOPOPTS:
126 advance = hbhopt_print(cp);
127 nh = *cp;
128 break;
129 case IPPROTO_DSTOPTS:
130 advance = dstopt_print(cp);
131 nh = *cp;
132 break;
133 case IPPROTO_FRAGMENT:
134 advance = frag6_print(cp, (const u_char *)ip6);
135 if (snapend <= cp + advance)
136 return;
137 nh = *cp;
138 fragmented = 1;
139 break;
140
141 case IPPROTO_MOBILITY_OLD:
142 case IPPROTO_MOBILITY:
143 /*
144 * XXX - we don't use "advance"; the current
145 * "Mobility Support in IPv6" draft
146 * (draft-ietf-mobileip-ipv6-24) says that
147 * the next header field in a mobility header
148 * should be IPPROTO_NONE, but speaks of
149 * the possiblity of a future extension in
150 * which payload can be piggybacked atop a
151 * mobility header.
152 */
153 advance = mobility_print(cp, (const u_char *)ip6);
154 nh = *cp;
155 return;
156 case IPPROTO_ROUTING:
157 advance = rt6_print(cp, (const u_char *)ip6);
158 nh = *cp;
159 break;
160 case IPPROTO_SCTP:
161 sctp_print(cp, (const u_char *)ip6, len);
162 return;
163 case IPPROTO_DCCP:
164 dccp_print(cp, (const u_char *)ip6, len);
165 return;
166 case IPPROTO_TCP:
167 tcp_print(cp, len, (const u_char *)ip6, fragmented);
168 return;
169 case IPPROTO_UDP:
170 udp_print(cp, len, (const u_char *)ip6, fragmented);
171 return;
172 case IPPROTO_ICMPV6:
173 icmp6_print(cp, len, (const u_char *)ip6, fragmented);
174 return;
175 case IPPROTO_AH:
176 advance = ah_print(cp);
177 nh = *cp;
178 break;
179 case IPPROTO_ESP:
180 {
181 int enh, padlen;
182 advance = esp_print(gndo, cp, len, (const u_char *)ip6, &enh, &padlen);
183 nh = enh & 0xff;
184 len -= padlen;
185 break;
186 }
187 case IPPROTO_IPCOMP:
188 {
189 int enh;
190 advance = ipcomp_print(cp, &enh);
191 nh = enh & 0xff;
192 break;
193 }
194
195 case IPPROTO_PIM:
196 pim_print(cp, len);
197 return;
198
199 case IPPROTO_OSPF:
200 ospf6_print(cp, len);
201 return;
202
203 case IPPROTO_IPV6:
204 ip6_print(cp, len);
205 return;
206
207 case IPPROTO_IPV4:
208 ip_print(gndo, cp, len);
209 return;
210
211 case IPPROTO_PGM:
212 pgm_print(cp, len, (const u_char *)ip6);
213 return;
214
215 case IPPROTO_GRE:
216 gre_print(cp, len);
217 return;
218
219 case IPPROTO_RSVP:
220 rsvp_print(cp, len);
221 return;
222
223 case IPPROTO_NONE:
224 (void)printf("no next header");
225 return;
226
227 default:
825e8fa1 228 (void)printf("ip-proto-%d %d", nh, len);
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229 return;
230 }
231 }
232
233 return;
234trunc:
235 (void)printf("[|ip6]");
236}
237
238#endif /* INET6 */