1 /*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
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 /* \summary: IPv4/IPv6 payload printer */
23
24 #ifdef HAVE_CONFIG_H
25 #include <config.h>
26 #endif
27
28 #include "netdissect-stdinc.h"
29
30 #include "netdissect.h"
31 #include "addrtoname.h"
32 #include "extract.h"
33
34 #include "ip.h"
35 #include "ipproto.h"
36
37 void
ip_demux_print(netdissect_options * ndo,const u_char * bp,u_int length,u_int ver,int fragmented,u_int ttl_hl,uint8_t nh,const u_char * iph)38 ip_demux_print(netdissect_options *ndo,
39 const u_char *bp,
40 u_int length, u_int ver, int fragmented, u_int ttl_hl,
41 uint8_t nh, const u_char *iph)
42 {
43 int advance;
44 const char *p_name;
45
46 advance = 0;
47
48 again:
49 switch (nh) {
50
51 case IPPROTO_AH:
52 if (!ND_TTEST_1(bp)) {
53 ndo->ndo_protocol = "ah";
54 nd_print_trunc(ndo);
55 break;
56 }
57 nh = GET_U_1(bp);
58 advance = ah_print(ndo, bp);
59 if (advance <= 0)
60 break;
61 bp += advance;
62 length -= advance;
63 goto again;
64
65 case IPPROTO_ESP:
66 {
67 esp_print(ndo, bp, length, iph, ver, fragmented, ttl_hl);
68 /*
69 * Either this has decrypted the payload and
70 * printed it, in which case there's nothing more
71 * to do, or it hasn't, in which case there's
72 * nothing more to do.
73 */
74 break;
75 }
76
77 case IPPROTO_IPCOMP:
78 {
79 ipcomp_print(ndo, bp);
80 /*
81 * Either this has decompressed the payload and
82 * printed it, in which case there's nothing more
83 * to do, or it hasn't, in which case there's
84 * nothing more to do.
85 */
86 break;
87 }
88
89 case IPPROTO_SCTP:
90 sctp_print(ndo, bp, iph, length);
91 break;
92
93 case IPPROTO_DCCP:
94 dccp_print(ndo, bp, iph, length);
95 break;
96
97 case IPPROTO_TCP:
98 tcp_print(ndo, bp, length, iph, fragmented);
99 break;
100
101 case IPPROTO_UDP:
102 udp_print(ndo, bp, length, iph, fragmented, ttl_hl);
103 break;
104
105 case IPPROTO_ICMP:
106 if (ver == 4)
107 icmp_print(ndo, bp, length, iph, fragmented);
108 else {
109 ND_PRINT("[%s requires IPv4]",
110 tok2str(ipproto_values,"unknown",nh));
111 nd_print_invalid(ndo);
112 }
113 break;
114
115 case IPPROTO_ICMPV6:
116 if (ver == 6)
117 icmp6_print(ndo, bp, length, iph, fragmented);
118 else {
119 ND_PRINT("[%s requires IPv6]",
120 tok2str(ipproto_values,"unknown",nh));
121 nd_print_invalid(ndo);
122 }
123 break;
124
125 case IPPROTO_PIGP:
126 /*
127 * XXX - the current IANA protocol number assignments
128 * page lists 9 as "any private interior gateway
129 * (used by Cisco for their IGRP)" and 88 as
130 * "EIGRP" from Cisco.
131 *
132 * Recent BSD <netinet/in.h> headers define
133 * IP_PROTO_PIGP as 9 and IP_PROTO_IGRP as 88.
134 * We define IP_PROTO_PIGP as 9 and
135 * IP_PROTO_EIGRP as 88; those names better
136 * match was the current protocol number
137 * assignments say.
138 */
139 igrp_print(ndo, bp, length);
140 break;
141
142 case IPPROTO_EIGRP:
143 eigrp_print(ndo, bp, length);
144 break;
145
146 case IPPROTO_ND:
147 ND_PRINT(" nd %u", length);
148 break;
149
150 case IPPROTO_EGP:
151 egp_print(ndo, bp, length);
152 break;
153
154 case IPPROTO_OSPF:
155 if (ver == 6)
156 ospf6_print(ndo, bp, length);
157 else
158 ospf_print(ndo, bp, length, iph);
159 break;
160
161 case IPPROTO_IGMP:
162 if (ver == 4)
163 igmp_print(ndo, bp, length);
164 else {
165 ND_PRINT("[%s requires IPv4]",
166 tok2str(ipproto_values,"unknown",nh));
167 nd_print_invalid(ndo);
168 }
169 break;
170
171 case IPPROTO_IPV4:
172 /* ipv4-in-ip encapsulation */
173 ip_print(ndo, bp, length);
174 break;
175
176 case IPPROTO_IPV6:
177 /* ip6-in-ip encapsulation */
178 ip6_print(ndo, bp, length);
179 break;
180
181 case IPPROTO_RSVP:
182 rsvp_print(ndo, bp, length);
183 break;
184
185 case IPPROTO_GRE:
186 gre_print(ndo, bp, length);
187 break;
188
189 case IPPROTO_MOBILE:
190 mobile_print(ndo, bp, length);
191 break;
192
193 case IPPROTO_PIM:
194 pim_print(ndo, bp, length, iph);
195 break;
196
197 case IPPROTO_VRRP:
198 if (ndo->ndo_packettype == PT_CARP) {
199 carp_print(ndo, bp, length, ttl_hl);
200 } else {
201 vrrp_print(ndo, bp, length, iph, ttl_hl, ver);
202 }
203 break;
204
205 case IPPROTO_PGM:
206 pgm_print(ndo, bp, length, iph);
207 break;
208
209 case IPPROTO_ETHERNET:
210 if (ver == 6)
211 ether_print(ndo, bp, length, ND_BYTES_AVAILABLE_AFTER(bp), NULL, NULL);
212 else {
213 ND_PRINT("[%s requires IPv6]",
214 tok2str(ipproto_values,"unknown",nh));
215 nd_print_invalid(ndo);
216 }
217 break;
218
219 case IPPROTO_NONE:
220 ND_PRINT("no next header");
221 break;
222
223 default:
224 if (ndo->ndo_nflag==0 && (p_name = netdb_protoname(nh)) != NULL)
225 ND_PRINT(" %s", p_name);
226 else
227 ND_PRINT(" ip-proto-%u", nh);
228 ND_PRINT(" %u", length);
229 break;
230 }
231 }
232