/* packet-ipv6.h * Definitions for IPv6 packet disassembly * * $Id$ * * Wireshark - Network traffic analyzer * By Gerald Combs * * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef __PACKET_IPV6_H_DEFINED__ #define __PACKET_IPV6_H_DEFINED__ #include /* this definition makes trouble with Microsoft Platform SDK: ws2tcpip.h and is used nowhere */ /*#define INET6_ADDRSTRLEN 46*/ /* * Definition for internet protocol version 6. * RFC 2460 */ struct ip6_hdr { union { struct ip6_hdrctl { guint32 ip6_un1_flow; /* version, class, flow */ guint16 ip6_un1_plen; /* payload length */ guint8 ip6_un1_nxt; /* next header */ guint8 ip6_un1_hlim; /* hop limit */ } ip6_un1; guint8 ip6_un2_vfc; /* 4 bits version, 4 bits class */ } ip6_ctlun; struct e_in6_addr ip6_src; /* source address */ struct e_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 /* Offsets of fields within an IPv6 header. */ #define IP6H_CTL 0 #define IP6H_CTL_FLOW 0 #define IP6H_CTL_PLEN 4 #define IP6H_CTL_NXT 6 #define IP6H_CTL_HLIM 7 #define IP6H_CTL_VFC 0 #define IP6H_SRC 8 #define IP6H_DST 24 #define IPV6_FLOWINFO_MASK 0x0fffffff /* flow info (28 bits) */ #define IPV6_FLOWLABEL_MASK 0x000fffff /* flow label (20 bits) */ /* * Extension Headers */ struct ip6_ext { guchar ip6e_nxt; guchar ip6e_len; }; /* Hop-by-Hop options header */ /* XXX should we pad it to force alignment on an 8-byte boundary? */ struct ip6_hbh { guint8 ip6h_nxt; /* next header */ guint8 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 { guint8 ip6d_nxt; /* next header */ guint8 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_RTALERT 0x05 /* 00 0 00101 */ #define IP6OPT_RTALERT_LEN 4 #define IP6OPT_RTALERT_MLD 0 /* Datagram contains MLD message */ #define IP6OPT_RTALERT_RSVP 1 /* Datagram contains RSVP message */ #define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */ #define IP6OPT_MINLEN 2 #define IP6OPT_HOME_ADDRESS 0xC9 /* 11 0 01001 */ #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 { guint8 ip6r_nxt; /* next header */ guint8 ip6r_len; /* length in units of 8 octets */ guint8 ip6r_type; /* routing type */ guint8 ip6r_segleft; /* segments left */ /* followed by routing type specific data */ }; /* Type 0 Routing header */ struct ip6_rthdr0 { guint8 ip6r0_nxt; /* next header */ guint8 ip6r0_len; /* length in units of 8 octets */ guint8 ip6r0_type; /* always zero */ guint8 ip6r0_segleft; /* segments left */ guint8 ip6r0_reserved; /* reserved field */ guint8 ip6r0_slmap[3]; /* strict/loose bit map */ struct e_in6_addr ip6r0_addr[1]; /* up to 23 addresses */ }; /* Fragment header */ struct ip6_frag { guint8 ip6f_nxt; /* next header */ guint8 ip6f_reserved; /* reserved field */ guint16 ip6f_offlg; /* offset, reserved, and flag */ guint32 ip6f_ident; /* identification */ }; /* SHIM6 control message types */ #define SHIM6_TYPE_I1 0x01 /* 0 000 0001 */ #define SHIM6_TYPE_R1 0x02 /* 0 000 0010 */ #define SHIM6_TYPE_I2 0x03 /* 0 000 0011 */ #define SHIM6_TYPE_R2 0x04 /* 0 000 0100 */ #define SHIM6_TYPE_R1BIS 0x05 /* 0 000 0101 */ #define SHIM6_TYPE_I2BIS 0x06 /* 0 000 0110 */ #define SHIM6_TYPE_UPD_REQ 0x40 /* 0 100 0000 = 64 */ #define SHIM6_TYPE_UPD_ACK 0x41 /* 0 100 0001 = 65 */ #define SHIM6_TYPE_KEEPALIVE 0x42 /* 0 100 0010 = 66 */ #define SHIM6_TYPE_PROBE 0x43 /* 0 100 0011 = 67 */ /* SHIM6 Options */ #define SHIM6_OPT_RESPVAL 0x01 /* 0 000 0001 */ #define SHIM6_OPT_LOCLIST 0x02 /* 0 000 0010 */ #define SHIM6_OPT_LOCPREF 0x03 /* 0 000 0011 */ #define SHIM6_OPT_CGAPDM 0x04 /* 0 000 0100 */ #define SHIM6_OPT_CGASIG 0x05 /* 0 000 0101 */ #define SHIM6_OPT_ULIDPAIR 0x06 /* 0 000 0110 */ #define SHIM6_OPT_FII 0x07 /* 0 000 0111 */ /* SHIM6 Bitmasks */ #define SHIM6_BITMASK_P 0x80 /* 1 000 0000 */ #define SHIM6_BITMASK_TYPE 0x7F /* 0 111 1111 */ #define SHIM6_BITMASK_PROTOCOL 0x01 /* 0 000 0001 */ #define SHIM6_BITMASK_SPECIFIC 0xFE /* 1 111 1110 */ #define SHIM6_BITMASK_R 0x80 /* 1 000 0000 */ #define SHIM6_BITMASK_CT 0x7F /* 0 111 1111 */ #define SHIM6_BITMASK_OPT_TYPE 0xFFFE /* 1 111 1111 1 111 1110 */ #define SHIM6_BITMASK_CRITICAL 0x01 /* 0 000 0001 */ #define SHIM6_BITMASK_PRECVD 0xF0 /* 1 111 0000 */ #define SHIM6_BITMASK_PSENT 0x0F /* 0 000 1111 */ #define SHIM6_BITMASK_STA 0xC0 /* 1 100 0000 */ /* SHIM6 Verification Methods */ #define SHIM6_VERIF_HBA 0x01 /* 0 000 0001 */ #define SHIM6_VERIF_CGA 0x02 /* 0 000 0010 */ /* SHIM6 Flags */ #define SHIM6_FLAG_BROKEN 0x01 /* 0 000 0001 */ #define SHIM6_FLAG_TEMPORARY 0x02 /* 0 000 0010 */ /* SHIM6 REAP States */ #define SHIM6_REAP_OPERATIONAL 0x00 /* 0 000 0000 */ #define SHIM6_REAP_EXPLORING 0x01 /* 0 000 0001 */ #define SHIM6_REAP_INBOUNDOK 0x02 /* 0 000 0010 */ /* SHIM6 header */ struct ip6_shim { guint8 ip6s_nxt; /* next header */ guint8 ip6s_len; /* header extension length */ guint8 ip6s_p; /* P field and first 7 bits of remainder */ /* followed by shim6 specific data*/ }; #define IP6F_OFF_MASK 0xfff8 /* mask out offset from _offlg */ #define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */ #define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */ void capture_ipv6(const guchar *, int, int, packet_counts *); #endif /* __PACKET_IPV6_H_DEFINED__ */