/* packet-ipv6.h * Definitions for IPv6 packet disassembly * * $Id: packet-ipv6.h,v 1.3 1999/04/06 16:24:49 gram Exp $ * * Ethereal - 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__ struct e_in6_addr { union { guint32 u6_addr32[4]; guint16 u6_addr16[8]; guint8 u6_addr8[16]; } u6_addr; /* 128 bit IP6 address */ }; #define s6_addr32 u6_addr.u6_addr32 #define s6_addr16 u6_addr.u6_addr16 #define s6_addr8 u6_addr.u6_addr8 #define s6_addr u6_addr.u6_addr8 #define INET6_ADDRSTRLEN 46 /* * Definition for internet protocol version 6. * RFC 1883 */ struct ip6_hdr { union { struct ip6_hdrctl { guint32 ip6_un1_flow; /* 20 bits of flow-ID */ 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 #define IPV6_VERSION 0x60 #define IPV6_VERSION_MASK 0xf0 #if BYTE_ORDER == BIG_ENDIAN #define IPV6_FLOWINFO_MASK 0x0fffffff /* flow info (28 bits) */ #define IPV6_FLOWLABEL_MASK 0x000fffff /* flow label (20 bits) */ #endif /* BIG_ENDIAN */ #if BYTE_ORDER == LITTLE_ENDIAN #define IPV6_FLOWINFO_MASK 0xffffff0f /* flow info (28 bits) */ #define IPV6_FLOWLABEL_MASK 0xffff0f00 /* flow label (20 bits) */ #endif /* LITTLE_ENDIAN */ /* * 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 { 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_MINLEN 2 #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 */ }; #if BYTE_ORDER == BIG_ENDIAN #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 */ #else /* BYTE_ORDER == LITTLE_ENDIAN */ #define IP6F_OFF_MASK 0xf8ff /* mask out offset from _offlg */ #define IP6F_RESERVED_MASK 0x0600 /* reserved bits in ip6f_offlg */ #define IP6F_MORE_FRAG 0x0100 /* more-fragments flag */ #endif /* BYTE_ORDER == LITTLE_ENDIAN */ /* * Definition for ICMPv6. * RFC 1885 */ #define ICMPV6_PLD_MAXLEN 1232 /* IPV6_MMTU - sizeof(struct ip6_hdr) - sizeof(struct icmp6_hdr) */ struct icmp6_hdr { guint8 icmp6_type; /* type field */ guint8 icmp6_code; /* code field */ guint16 icmp6_cksum; /* checksum field */ union { guint32 icmp6_un_data32[1]; /* type-specific field */ guint16 icmp6_un_data16[2]; /* type-specific field */ guint8 icmp6_un_data8[4]; /* type-specific field */ } icmp6_dataun; }; #define icmp6_data32 icmp6_dataun.icmp6_un_data32 #define icmp6_data16 icmp6_dataun.icmp6_un_data16 #define icmp6_data8 icmp6_dataun.icmp6_un_data8 #define icmp6_pptr icmp6_data32[0] /* parameter prob */ #define icmp6_mtu icmp6_data32[0] /* packet too big */ #define icmp6_id icmp6_data16[0] /* echo request/reply */ #define icmp6_seq icmp6_data16[1] /* echo request/reply */ #define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */ #define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */ #define ICMP6_PACKET_TOO_BIG 2 /* packet too big */ #define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */ #define ICMP6_PARAM_PROB 4 /* ip6 header bad */ #define ICMP6_ECHO_REQUEST 128 /* echo service */ #define ICMP6_ECHO_REPLY 129 /* echo reply */ #define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */ #define MLD6_LISTENER_QUERY 130 /* multicast listener query */ #define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */ #define MLD6_LISTENER_REPORT 131 /* multicast listener report */ #define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */ #define MLD6_LISTENER_DONE 132 /* multicast listener done */ #define ND_ROUTER_SOLICIT 133 /* router solicitation */ #define ND_ROUTER_ADVERT 134 /* router advertisment */ #define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */ #define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisment */ #define ND_REDIRECT 137 /* redirect */ #define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */ /* xxx: actually not assigned yet */ #define ICMP6_WRUREQUEST 140 /* who are you request */ #define ICMP6_WRUREPLY 141 /* who are you reply */ #define ICMP6_FQDN_QUERY 140 /* FQDN query */ #define ICMP6_FQDN_REPLY 141 /* FQDN reply */ #define ICMP6_MAXTYPE 141 #define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */ #define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */ #define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor */ #define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */ #define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */ #define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */ #define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */ #define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */ #define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */ #define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */ #define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */ #define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */ #define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */ #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */ /* * Multicast Listener Discovery */ struct mld6_hdr { struct icmp6_hdr mld6_hdr; struct e_in6_addr mld6_addr; /* multicast address */ }; #define mld6_type mld6_hdr.icmp6_type #define mld6_code mld6_hdr.icmp6_code #define mld6_cksum mld6_hdr.icmp6_cksum #define mld6_maxdelay mld6_hdr.icmp6_data16[0] #define mld6_reserved mld6_hdr.icmp6_data16[1] /* * Neighbor Discovery */ struct nd_router_solicit { /* router solicitation */ struct icmp6_hdr nd_rs_hdr; /* could be followed by options */ }; #define nd_rs_type nd_rs_hdr.icmp6_type #define nd_rs_code nd_rs_hdr.icmp6_code #define nd_rs_cksum nd_rs_hdr.icmp6_cksum #define nd_rs_reserved nd_rs_hdr.icmp6_data32[0] struct nd_router_advert { /* router advertisement */ struct icmp6_hdr nd_ra_hdr; guint32 nd_ra_reachable; /* reachable time */ guint32 nd_ra_retransmit; /* retransmit timer */ /* could be followed by options */ }; #define nd_ra_type nd_ra_hdr.icmp6_type #define nd_ra_code nd_ra_hdr.icmp6_code #define nd_ra_cksum nd_ra_hdr.icmp6_cksum #define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0] #define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1] #define ND_RA_FLAG_MANAGED 0x80 #define ND_RA_FLAG_OTHER 0x40 #define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1] struct nd_neighbor_solicit { /* neighbor solicitation */ struct icmp6_hdr nd_ns_hdr; struct e_in6_addr nd_ns_target; /*target address */ /* could be followed by options */ }; #define nd_ns_type nd_ns_hdr.icmp6_type #define nd_ns_code nd_ns_hdr.icmp6_code #define nd_ns_cksum nd_ns_hdr.icmp6_cksum #define nd_ns_reserved nd_ns_hdr.icmp6_data32[0] struct nd_neighbor_advert { /* neighbor advertisement */ struct icmp6_hdr nd_na_hdr; struct e_in6_addr nd_na_target; /* target address */ /* could be followed by options */ }; #define nd_na_type nd_na_hdr.icmp6_type #define nd_na_code nd_na_hdr.icmp6_code #define nd_na_cksum nd_na_hdr.icmp6_cksum #define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0] #if BYTE_ORDER == BIG_ENDIAN #define ND_NA_FLAG_ROUTER 0x80000000 #define ND_NA_FLAG_SOLICITED 0x40000000 #define ND_NA_FLAG_OVERRIDE 0x20000000 #elif BYTE_ORDER == LITTLE_ENDIAN #define ND_NA_FLAG_ROUTER 0x80 #define ND_NA_FLAG_SOLICITED 0x40 #define ND_NA_FLAG_OVERRIDE 0x20 #endif struct nd_redirect { /* redirect */ struct icmp6_hdr nd_rd_hdr; struct e_in6_addr nd_rd_target; /* target address */ struct e_in6_addr nd_rd_dst; /* destination address */ /* could be followed by options */ }; #define nd_rd_type nd_rd_hdr.icmp6_type #define nd_rd_code nd_rd_hdr.icmp6_code #define nd_rd_cksum nd_rd_hdr.icmp6_cksum #define nd_rd_reserved nd_rd_hdr.icmp6_data32[0] struct nd_opt_hdr { /* Neighbor discovery option header */ guint8 nd_opt_type; guint8 nd_opt_len; /* followed by option specific data*/ }; #define ND_OPT_SOURCE_LINKADDR 1 #define ND_OPT_TARGET_LINKADDR 2 #define ND_OPT_PREFIX_INFORMATION 3 #define ND_OPT_REDIRECTED_HEADER 4 #define ND_OPT_MTU 5 struct nd_opt_prefix_info { /* prefix information */ guint8 nd_opt_pi_type; guint8 nd_opt_pi_len; guint8 nd_opt_pi_prefix_len; guint8 nd_opt_pi_flags_reserved; guint32 nd_opt_pi_valid_time; guint32 nd_opt_pi_preferred_time; guint32 nd_opt_pi_reserved2; struct e_in6_addr nd_opt_pi_prefix; }; #define ND_OPT_PI_FLAG_ONLINK 0x80 #define ND_OPT_PI_FLAG_AUTO 0x40 struct nd_opt_rd_hdr { /* redirected header */ guint8 nd_opt_rh_type; guint8 nd_opt_rh_len; guint16 nd_opt_rh_reserved1; guint32 nd_opt_rh_reserved2; /* followed by IP header and data */ }; struct nd_opt_mtu { /* MTU option */ guint8 nd_opt_mtu_type; guint8 nd_opt_mtu_len; guint16 nd_opt_mtu_reserved; guint32 nd_opt_mtu_mtu; }; #if 0 /* disregard until used. We have to decide how to handle guint64 */ /* * icmp6 namelookup */ struct icmp6_namelookup { struct icmp6_hdr icmp6_nl_hdr; guint64 icmp6_nl_nonce; guint32 icmp6_nl_ttl; #if 0 guint8 icmp6_nl_len; guint8 icmp6_nl_name[3]; #endif /* could be followed by options */ }; #endif /* * Router Renumbering. as router-renum-05.txt */ #if BYTE_ORDER == BIG_ENDIAN /* net byte order */ struct icmp6_router_renum { /* router renumbering header */ struct icmp6_hdr rr_hdr; guint8 rr_segnum; guint8 rr_test : 1; guint8 rr_reqresult : 1; guint8 rr_forceapply : 1; guint8 rr_specsite : 1; guint8 rr_prevdone : 1; guint8 rr_flags_reserved : 3; guint16 rr_maxdelay; guint32 rr_reserved; }; #elif BYTE_ORDER == LITTLE_ENDIAN struct icmp6_router_renum { /* router renumbering header */ struct icmp6_hdr rr_hdr; guint8 rr_segnum; guint8 rr_flags_reserved : 3; guint8 rr_prevdone : 1; guint8 rr_specsite : 1; guint8 rr_forceapply : 1; guint8 rr_reqresult : 1; guint8 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; guint8 rpu_mask_onlink : 1; guint8 rpu_mask_autonomous : 1; guint8 rpu_mask_reserved : 6; guint8 rpu_onlink : 1; guint8 rpu_autonomous : 1; guint8 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; guint8 rpu_mask_reserved : 6; guint8 rpu_mask_autonomous : 1; guint8 rpu_mask_onlink : 1; guint8 rpu_raflags_reserved : 6; guint8 rpu_autonomous : 1; guint8 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; guint8 rrr_flags_reserved : 6; guint8 rrr_outofbound : 1; guint8 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; guint8 rrr_forbidden : 1; guint8 rrr_outofbound : 1; guint8 rrr_flags_reserved : 6; guint8 rrr_ordinal; guint8 rrr_matchedlen; guint32 rrr_ifid; struct e_in6_addr rrr_prefix; }; #endif /* BYTE_ORDER */ struct e_in6_addr; gchar* ip6_to_str(struct e_in6_addr *); #endif /* __PACKET_IPV6_H_DEFINED__ */