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 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); 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