/* @(#) $Header: /tcpdump/master/tcpdump/ip6.h,v 1.6.4.1 2005/04/20 10:04:37 guy Exp $ (LBL) */ /* $NetBSD: ip6.h,v 1.9 2000/07/13 05:34:21 itojun Exp $ */ /* $KAME: ip6.h,v 1.9 2000/07/02 21:01:32 itojun Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * 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 project 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 PROJECT AND CONTRIBUTORS ``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 PROJECT OR CONTRIBUTORS 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. */ /* * Copyright (c) 1982, 1986, 1993 * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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 REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * @(#)ip.h 8.1 (Berkeley) 6/10/93 */ #ifndef _NETINET_IP6_H_ #define _NETINET_IP6_H_ /* * Definition for internet protocol version 6. * RFC 2460 */ struct ip6_hdr { union { struct ip6_hdrctl { u_int32_t ip6_un1_flow; /* 20 bits of flow-ID */ u_int16_t ip6_un1_plen; /* payload length */ u_int8_t ip6_un1_nxt; /* next header */ u_int8_t ip6_un1_hlim; /* hop limit */ } ip6_un1; u_int8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */ } ip6_ctlun; struct in6_addr ip6_src; /* source address */ struct in6_addr ip6_dst; /* destination address */ }; #define ip6_vfc ip6_ctlun.ip6_un2_vfc #define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow #define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen #define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt #define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim #define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim /* in network endian */ #define IPV6_FLOWINFO_MASK ((u_int32_t)htonl(0x0fffffff)) /* flow info (28 bits) */ #define IPV6_FLOWLABEL_MASK ((u_int32_t)htonl(0x000fffff)) /* flow label (20 bits) */ #if 1 /* ECN bits proposed by Sally Floyd */ #define IP6TOS_CE 0x01 /* congestion experienced */ #define IP6TOS_ECT 0x02 /* ECN-capable transport */ #endif /* * Extension Headers */ struct ip6_ext { u_char ip6e_nxt; u_char ip6e_len; }; /* Hop-by-Hop options header */ /* XXX should we pad it to force alignment on an 8-byte boundary? */ struct ip6_hbh { u_int8_t ip6h_nxt; /* next header */ u_int8_t ip6h_len; /* length in units of 8 octets */ /* followed by options */ }; /* Destination options header */ /* XXX should we pad it to force alignment on an 8-byte boundary? */ struct ip6_dest { u_int8_t ip6d_nxt; /* next header */ u_int8_t ip6d_len; /* length in units of 8 octets */ /* followed by options */ }; /* Option types and related macros */ #define IP6OPT_PAD1 0x00 /* 00 0 00000 */ #define IP6OPT_PADN 0x01 /* 00 0 00001 */ #define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */ #define IP6OPT_JUMBO_LEN 6 #define IP6OPT_ROUTER_ALERT 0x05 /* 00 0 00101 */ #define IP6OPT_RTALERT_LEN 4 #define IP6OPT_RTALERT_MLD 0 /* Datagram contains an MLD message */ #define IP6OPT_RTALERT_RSVP 1 /* Datagram contains an RSVP message */ #define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */ #define IP6OPT_MINLEN 2 #define IP6OPT_BINDING_UPDATE 0xc6 /* 11 0 00110 */ #define IP6OPT_BINDING_ACK 0x07 /* 00 0 00111 */ #define IP6OPT_BINDING_REQ 0x08 /* 00 0 01000 */ #define IP6OPT_HOME_ADDRESS 0xc9 /* 11 0 01001 */ #define IP6OPT_EID 0x8a /* 10 0 01010 */ #define IP6OPT_TYPE(o) ((o) & 0xC0) #define IP6OPT_TYPE_SKIP 0x00 #define IP6OPT_TYPE_DISCARD 0x40 #define IP6OPT_TYPE_FORCEICMP 0x80 #define IP6OPT_TYPE_ICMP 0xC0 #define IP6OPT_MUTABLE 0x20 /* Routing header */ struct ip6_rthdr { u_int8_t ip6r_nxt; /* next header */ u_int8_t ip6r_len; /* length in units of 8 octets */ u_int8_t ip6r_type; /* routing type */ u_int8_t ip6r_segleft; /* segments left */ /* followed by routing type specific data */ }; /* Type 0 Routing header */ struct ip6_rthdr0 { u_int8_t ip6r0_nxt; /* next header */ u_int8_t ip6r0_len; /* length in units of 8 octets */ u_int8_t ip6r0_type; /* always zero */ u_int8_t ip6r0_segleft; /* segments left */ u_int8_t ip6r0_reserved; /* reserved field */ u_int8_t ip6r0_slmap[3]; /* strict/loose bit map */ struct in6_addr ip6r0_addr[1]; /* up to 23 addresses */ }; /* Fragment header */ struct ip6_frag { u_int8_t ip6f_nxt; /* next header */ u_int8_t ip6f_reserved; /* reserved field */ u_int16_t ip6f_offlg; /* offset, reserved, and flag */ u_int32_t ip6f_ident; /* identification */ }; #define IP6F_OFF_MASK 0xfff8 /* mask out offset from ip6f_offlg */ #define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */ #define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */ #endif /* not _NETINET_IP6_H_ */