![Guy Harris](/assets/img/avatar_default.png)
(remove commas following the last member of an enum, make all bit fields "guint32" - GCC lets you get away with that, but at least some other compilers don't). svn path=/trunk/; revision=1052
528 lines
15 KiB
C
528 lines
15 KiB
C
/* packet-ipv6.h
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* Definitions for IPv6 packet disassembly
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*
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* $Id: packet-ipv6.h,v 1.9 1999/11/18 01:45:05 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __PACKET_IPV6_H_DEFINED__
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#define __PACKET_IPV6_H_DEFINED__
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#ifndef __GLOBALS_H__
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#include "globals.h"
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#endif
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struct e_in6_addr {
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union {
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guint32 u6_addr32[4];
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guint16 u6_addr16[8];
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guint8 u6_addr8[16];
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} u6_addr; /* 128 bit IP6 address */
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};
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#ifdef s6_addr32
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#undef s6_addr32
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#endif
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#ifdef s6_addr16
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#undef s6_addr16
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#endif
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#ifdef s6_addr8
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#undef s6_addr8
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#endif
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#ifdef s6_addr
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#undef s6_addr
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#endif
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#define s6_addr32 u6_addr.u6_addr32
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#define s6_addr16 u6_addr.u6_addr16
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#define s6_addr8 u6_addr.u6_addr8
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#define s6_addr u6_addr.u6_addr8
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#define INET6_ADDRSTRLEN 46
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/*
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* Definition for internet protocol version 6.
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* RFC 1883
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*/
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struct ip6_hdr {
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union {
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struct ip6_hdrctl {
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guint32 ip6_un1_flow; /* 20 bits of flow-ID */
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guint16 ip6_un1_plen; /* payload length */
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guint8 ip6_un1_nxt; /* next header */
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guint8 ip6_un1_hlim; /* hop limit */
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} ip6_un1;
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guint8 ip6_un2_vfc; /* 4 bits version, 4 bits class */
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} ip6_ctlun;
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struct e_in6_addr ip6_src; /* source address */
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struct e_in6_addr ip6_dst; /* destination address */
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};
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#define ip6_vfc ip6_ctlun.ip6_un2_vfc
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#define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow
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#define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen
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#define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt
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#define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim
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#define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim
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/* Offsets of fields within an IPv6 header. */
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#define IP6H_CTL 0
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#define IP6H_CTL_FLOW 0
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#define IP6H_CTL_PLEN 4
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#define IP6H_CTL_NXT 6
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#define IP6H_CTL_HLIM 7
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#define IP6H_CTL_VFC 0
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#define IP6H_SRC 8
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#define IP6H_DST 24
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#if BYTE_ORDER == BIG_ENDIAN
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#define IPV6_FLOWINFO_MASK 0x0fffffff /* flow info (28 bits) */
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#define IPV6_FLOWLABEL_MASK 0x000fffff /* flow label (20 bits) */
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#endif /* BIG_ENDIAN */
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#if BYTE_ORDER == LITTLE_ENDIAN
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#define IPV6_FLOWINFO_MASK 0xffffff0f /* flow info (28 bits) */
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#define IPV6_FLOWLABEL_MASK 0xffff0f00 /* flow label (20 bits) */
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#endif /* LITTLE_ENDIAN */
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/*
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* Extension Headers
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*/
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struct ip6_ext {
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u_char ip6e_nxt;
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u_char ip6e_len;
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};
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/* Hop-by-Hop options header */
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/* XXX should we pad it to force alignment on an 8-byte boundary? */
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struct ip6_hbh {
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guint8 ip6h_nxt; /* next header */
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guint8 ip6h_len; /* length in units of 8 octets */
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/* followed by options */
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};
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/* Destination options header */
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/* XXX should we pad it to force alignment on an 8-byte boundary? */
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struct ip6_dest {
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guint8 ip6d_nxt; /* next header */
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guint8 ip6d_len; /* length in units of 8 octets */
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/* followed by options */
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};
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/* Option types and related macros */
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#define IP6OPT_PAD1 0x00 /* 00 0 00000 */
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#define IP6OPT_PADN 0x01 /* 00 0 00001 */
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#define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */
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#define IP6OPT_JUMBO_LEN 6
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#define IP6OPT_RTALERT 0x05 /* 00 0 00101 */
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#define IP6OPT_RTALERT_LEN 4
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#define IP6OPT_RTALERT_MLD 0 /* Datagram contains MLD message */
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#define IP6OPT_RTALERT_RSVP 1 /* Datagram contains RSVP message */
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#define IP6OPT_MINLEN 2
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#define IP6OPT_TYPE(o) ((o) & 0xC0)
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#define IP6OPT_TYPE_SKIP 0x00
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#define IP6OPT_TYPE_DISCARD 0x40
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#define IP6OPT_TYPE_FORCEICMP 0x80
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#define IP6OPT_TYPE_ICMP 0xC0
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#define IP6OPT_MUTABLE 0x20
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/* Routing header */
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struct ip6_rthdr {
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guint8 ip6r_nxt; /* next header */
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guint8 ip6r_len; /* length in units of 8 octets */
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guint8 ip6r_type; /* routing type */
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guint8 ip6r_segleft; /* segments left */
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/* followed by routing type specific data */
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};
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/* Type 0 Routing header */
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struct ip6_rthdr0 {
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guint8 ip6r0_nxt; /* next header */
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guint8 ip6r0_len; /* length in units of 8 octets */
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guint8 ip6r0_type; /* always zero */
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guint8 ip6r0_segleft; /* segments left */
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guint8 ip6r0_reserved; /* reserved field */
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guint8 ip6r0_slmap[3]; /* strict/loose bit map */
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struct e_in6_addr ip6r0_addr[1]; /* up to 23 addresses */
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};
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/* Fragment header */
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struct ip6_frag {
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guint8 ip6f_nxt; /* next header */
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guint8 ip6f_reserved; /* reserved field */
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guint16 ip6f_offlg; /* offset, reserved, and flag */
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guint32 ip6f_ident; /* identification */
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};
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#if BYTE_ORDER == BIG_ENDIAN
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#define IP6F_OFF_MASK 0xfff8 /* mask out offset from _offlg */
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#define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */
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#define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */
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#else /* BYTE_ORDER == LITTLE_ENDIAN */
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#define IP6F_OFF_MASK 0xf8ff /* mask out offset from _offlg */
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#define IP6F_RESERVED_MASK 0x0600 /* reserved bits in ip6f_offlg */
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#define IP6F_MORE_FRAG 0x0100 /* more-fragments flag */
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#endif /* BYTE_ORDER == LITTLE_ENDIAN */
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/*
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* Definition for ICMPv6.
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* RFC 1885
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*/
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#define ICMPV6_PLD_MAXLEN 1232 /* IPV6_MMTU - sizeof(struct ip6_hdr)
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- sizeof(struct icmp6_hdr) */
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struct icmp6_hdr {
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guint8 icmp6_type; /* type field */
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guint8 icmp6_code; /* code field */
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guint16 icmp6_cksum; /* checksum field */
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union {
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guint32 icmp6_un_data32[1]; /* type-specific field */
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guint16 icmp6_un_data16[2]; /* type-specific field */
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guint8 icmp6_un_data8[4]; /* type-specific field */
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} icmp6_dataun;
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};
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#define icmp6_data32 icmp6_dataun.icmp6_un_data32
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#define icmp6_data16 icmp6_dataun.icmp6_un_data16
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#define icmp6_data8 icmp6_dataun.icmp6_un_data8
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#define icmp6_pptr icmp6_data32[0] /* parameter prob */
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#define icmp6_mtu icmp6_data32[0] /* packet too big */
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#define icmp6_id icmp6_data16[0] /* echo request/reply */
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#define icmp6_seq icmp6_data16[1] /* echo request/reply */
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#define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */
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#define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */
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#define ICMP6_PACKET_TOO_BIG 2 /* packet too big */
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#define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */
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#define ICMP6_PARAM_PROB 4 /* ip6 header bad */
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#define ICMP6_ECHO_REQUEST 128 /* echo service */
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#define ICMP6_ECHO_REPLY 129 /* echo reply */
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#define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */
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#define MLD6_LISTENER_QUERY 130 /* multicast listener query */
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#define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */
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#define MLD6_LISTENER_REPORT 131 /* multicast listener report */
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#define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */
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#define MLD6_LISTENER_DONE 132 /* multicast listener done */
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#define ND_ROUTER_SOLICIT 133 /* router solicitation */
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#define ND_ROUTER_ADVERT 134 /* router advertisment */
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#define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */
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#define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisment */
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#define ND_REDIRECT 137 /* redirect */
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#define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */
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/* xxx: actually not assigned yet */
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#define ICMP6_WRUREQUEST 140 /* who are you request */
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#define ICMP6_WRUREPLY 141 /* who are you reply */
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#define ICMP6_FQDN_QUERY 140 /* FQDN query */
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#define ICMP6_FQDN_REPLY 141 /* FQDN reply */
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#define ICMP6_MAXTYPE 141
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#define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */
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#define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */
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#define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor */
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#define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */
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#define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */
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#define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */
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#define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */
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#define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */
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#define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */
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#define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */
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#define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
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#define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */
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#define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */
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#define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */
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/*
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* Multicast Listener Discovery
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*/
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struct mld6_hdr {
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struct icmp6_hdr mld6_hdr;
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struct e_in6_addr mld6_addr; /* multicast address */
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};
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#define mld6_type mld6_hdr.icmp6_type
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#define mld6_code mld6_hdr.icmp6_code
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#define mld6_cksum mld6_hdr.icmp6_cksum
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#define mld6_maxdelay mld6_hdr.icmp6_data16[0]
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#define mld6_reserved mld6_hdr.icmp6_data16[1]
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/*
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* Neighbor Discovery
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*/
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struct nd_router_solicit { /* router solicitation */
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struct icmp6_hdr nd_rs_hdr;
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/* could be followed by options */
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};
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#define nd_rs_type nd_rs_hdr.icmp6_type
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#define nd_rs_code nd_rs_hdr.icmp6_code
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#define nd_rs_cksum nd_rs_hdr.icmp6_cksum
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#define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
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struct nd_router_advert { /* router advertisement */
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struct icmp6_hdr nd_ra_hdr;
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guint32 nd_ra_reachable; /* reachable time */
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guint32 nd_ra_retransmit; /* retransmit timer */
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/* could be followed by options */
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};
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#define nd_ra_type nd_ra_hdr.icmp6_type
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#define nd_ra_code nd_ra_hdr.icmp6_code
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#define nd_ra_cksum nd_ra_hdr.icmp6_cksum
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#define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
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#define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
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#define ND_RA_FLAG_MANAGED 0x80
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#define ND_RA_FLAG_OTHER 0x40
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#define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
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struct nd_neighbor_solicit { /* neighbor solicitation */
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struct icmp6_hdr nd_ns_hdr;
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struct e_in6_addr nd_ns_target; /*target address */
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/* could be followed by options */
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};
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#define nd_ns_type nd_ns_hdr.icmp6_type
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#define nd_ns_code nd_ns_hdr.icmp6_code
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#define nd_ns_cksum nd_ns_hdr.icmp6_cksum
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#define nd_ns_reserved nd_ns_hdr.icmp6_data32[0]
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struct nd_neighbor_advert { /* neighbor advertisement */
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struct icmp6_hdr nd_na_hdr;
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struct e_in6_addr nd_na_target; /* target address */
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/* could be followed by options */
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};
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#define nd_na_type nd_na_hdr.icmp6_type
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#define nd_na_code nd_na_hdr.icmp6_code
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#define nd_na_cksum nd_na_hdr.icmp6_cksum
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#define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0]
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#if BYTE_ORDER == BIG_ENDIAN
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#define ND_NA_FLAG_ROUTER 0x80000000
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#define ND_NA_FLAG_SOLICITED 0x40000000
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#define ND_NA_FLAG_OVERRIDE 0x20000000
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#elif BYTE_ORDER == LITTLE_ENDIAN
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#define ND_NA_FLAG_ROUTER 0x80
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#define ND_NA_FLAG_SOLICITED 0x40
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#define ND_NA_FLAG_OVERRIDE 0x20
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#endif
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struct nd_redirect { /* redirect */
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struct icmp6_hdr nd_rd_hdr;
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struct e_in6_addr nd_rd_target; /* target address */
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struct e_in6_addr nd_rd_dst; /* destination address */
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/* could be followed by options */
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};
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#define nd_rd_type nd_rd_hdr.icmp6_type
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#define nd_rd_code nd_rd_hdr.icmp6_code
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#define nd_rd_cksum nd_rd_hdr.icmp6_cksum
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#define nd_rd_reserved nd_rd_hdr.icmp6_data32[0]
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struct nd_opt_hdr { /* Neighbor discovery option header */
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guint8 nd_opt_type;
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guint8 nd_opt_len;
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/* followed by option specific data*/
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};
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#define ND_OPT_SOURCE_LINKADDR 1
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#define ND_OPT_TARGET_LINKADDR 2
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#define ND_OPT_PREFIX_INFORMATION 3
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#define ND_OPT_REDIRECTED_HEADER 4
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#define ND_OPT_MTU 5
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struct nd_opt_prefix_info { /* prefix information */
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guint8 nd_opt_pi_type;
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guint8 nd_opt_pi_len;
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guint8 nd_opt_pi_prefix_len;
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guint8 nd_opt_pi_flags_reserved;
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guint32 nd_opt_pi_valid_time;
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guint32 nd_opt_pi_preferred_time;
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guint32 nd_opt_pi_reserved2;
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struct e_in6_addr nd_opt_pi_prefix;
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};
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#define ND_OPT_PI_FLAG_ONLINK 0x80
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#define ND_OPT_PI_FLAG_AUTO 0x40
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struct nd_opt_rd_hdr { /* redirected header */
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guint8 nd_opt_rh_type;
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guint8 nd_opt_rh_len;
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guint16 nd_opt_rh_reserved1;
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guint32 nd_opt_rh_reserved2;
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/* followed by IP header and data */
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};
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struct nd_opt_mtu { /* MTU option */
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guint8 nd_opt_mtu_type;
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guint8 nd_opt_mtu_len;
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guint16 nd_opt_mtu_reserved;
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guint32 nd_opt_mtu_mtu;
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};
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#if 0
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/* disregard until used. We have to decide how to handle guint64 */
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/*
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* icmp6 namelookup
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*/
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struct icmp6_namelookup {
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struct icmp6_hdr icmp6_nl_hdr;
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guint64 icmp6_nl_nonce;
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guint32 icmp6_nl_ttl;
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#if 0
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guint8 icmp6_nl_len;
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guint8 icmp6_nl_name[3];
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#endif
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/* could be followed by options */
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};
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#endif
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/*
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* Router Renumbering. as router-renum-05.txt
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*/
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#if BYTE_ORDER == BIG_ENDIAN /* net byte order */
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struct icmp6_router_renum { /* router renumbering header */
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struct icmp6_hdr rr_hdr;
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guint8 rr_segnum;
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guint32 rr_test : 1;
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guint32 rr_reqresult : 1;
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guint32 rr_forceapply : 1;
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guint32 rr_specsite : 1;
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guint32 rr_prevdone : 1;
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guint32 rr_flags_reserved : 3;
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guint16 rr_maxdelay;
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guint32 rr_reserved;
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};
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#elif BYTE_ORDER == LITTLE_ENDIAN
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struct icmp6_router_renum { /* router renumbering header */
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struct icmp6_hdr rr_hdr;
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guint8 rr_segnum;
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guint32 rr_flags_reserved : 3;
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guint32 rr_prevdone : 1;
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guint32 rr_specsite : 1;
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guint32 rr_forceapply : 1;
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guint32 rr_reqresult : 1;
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guint32 rr_test : 1;
|
|
guint16 rr_maxdelay;
|
|
guint32 rr_reserved;
|
|
};
|
|
#endif /* BYTE_ORDER */
|
|
|
|
#define rr_type rr_hdr.icmp6_type
|
|
#define rr_code rr_hdr.icmp6_code
|
|
#define rr_cksum rr_hdr.icmp6_cksum
|
|
#define rr_seqnum rr_hdr.icmp6_data32[0]
|
|
|
|
struct rr_pco_match { /* match prefix part */
|
|
guint8 rpm_code;
|
|
guint8 rpm_len;
|
|
guint8 rpm_ordinal;
|
|
guint8 rpm_matchlen;
|
|
guint8 rpm_minlen;
|
|
guint8 rpm_maxlen;
|
|
guint16 rpm_reserved;
|
|
struct e_in6_addr rpm_prefix;
|
|
};
|
|
|
|
#define RPM_PCO_ADD 1
|
|
#define RPM_PCO_CHANGE 2
|
|
#define RPM_PCO_SETGLOBAL 3
|
|
#define RPM_PCO_MAX 4
|
|
|
|
#if BYTE_ORDER == BIG_ENDIAN /* net byte order */
|
|
struct rr_pco_use { /* use prefix part */
|
|
guint8 rpu_uselen;
|
|
guint8 rpu_keeplen;
|
|
guint32 rpu_mask_onlink : 1;
|
|
guint32 rpu_mask_autonomous : 1;
|
|
guint32 rpu_mask_reserved : 6;
|
|
guint32 rpu_onlink : 1;
|
|
guint32 rpu_autonomous : 1;
|
|
guint32 rpu_raflags_reserved : 6;
|
|
guint32 rpu_vltime;
|
|
guint32 rpu_pltime;
|
|
guint32 rpu_decr_vltime : 1;
|
|
guint32 rpu_decr_pltime : 1;
|
|
guint32 rpu_flags_reserved : 6;
|
|
guint32 rpu_reserved : 24;
|
|
struct e_in6_addr rpu_prefix;
|
|
};
|
|
#elif BYTE_ORDER == LITTLE_ENDIAN
|
|
struct rr_pco_use { /* use prefix part */
|
|
guint8 rpu_uselen;
|
|
guint8 rpu_keeplen;
|
|
guint32 rpu_mask_reserved : 6;
|
|
guint32 rpu_mask_autonomous : 1;
|
|
guint32 rpu_mask_onlink : 1;
|
|
guint32 rpu_raflags_reserved : 6;
|
|
guint32 rpu_autonomous : 1;
|
|
guint32 rpu_onlink : 1;
|
|
guint32 rpu_vltime;
|
|
guint32 rpu_pltime;
|
|
guint32 rpu_flags_reserved : 6;
|
|
guint32 rpu_decr_pltime : 1;
|
|
guint32 rpu_decr_vltime : 1;
|
|
guint32 rpu_reserved : 24;
|
|
struct e_in6_addr rpu_prefix;
|
|
};
|
|
#endif /* BYTE_ORDER */
|
|
|
|
#if BYTE_ORDER == BIG_ENDIAN /* net byte order */
|
|
struct rr_result { /* router renumbering result message */
|
|
guint8 rrr_reserved;
|
|
guint32 rrr_flags_reserved : 6;
|
|
guint32 rrr_outofbound : 1;
|
|
guint32 rrr_forbidden : 1;
|
|
guint8 rrr_ordinal;
|
|
guint8 rrr_matchedlen;
|
|
guint32 rrr_ifid;
|
|
struct e_in6_addr rrr_prefix;
|
|
};
|
|
#elif BYTE_ORDER == LITTLE_ENDIAN
|
|
struct rr_result { /* router renumbering result message */
|
|
guint8 rrr_reserved;
|
|
guint32 rrr_forbidden : 1;
|
|
guint32 rrr_outofbound : 1;
|
|
guint32 rrr_flags_reserved : 6;
|
|
guint8 rrr_ordinal;
|
|
guint8 rrr_matchedlen;
|
|
guint32 rrr_ifid;
|
|
struct e_in6_addr rrr_prefix;
|
|
};
|
|
#endif /* BYTE_ORDER */
|
|
|
|
#endif /* __PACKET_IPV6_H_DEFINED__ */
|