/* packet-ipv6.h * Definitions for IPv6 packet disassembly * * $Id$ * * Wireshark - Network traffic analyzer * By Gerald Combs * * Copyright 1998 Gerald Combs * * MobileIPv6 support added by Tomislav Borosa * * HMIPv6 support added by Martti Kuparinen * * FMIPv6 support added by Martin Andre * * 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 */ /* * 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 */ #define ICMP6_WRUREQUEST 139 /* who are you request */ #define ICMP6_WRUREPLY 140 /* who are you reply */ #define ICMP6_FQDN_QUERY 139 /* FQDN query */ #define ICMP6_FQDN_REPLY 140 /* FQDN reply */ #define ICMP6_NI_QUERY 139 /* node information request */ #define ICMP6_NI_REPLY 140 /* node information reply */ #define ICMP6_IND_SOLICIT 141 /* Inverse ND Solicitation */ #define ICMP6_IND_ADVERT 142 /* Inverse ND advertisement */ #define ICMP6_MLDV2_REPORT 143 /* MLD v2 report message : [RFC3810] */ #define ICMP6_MIP6_DHAAD_REQUEST 144 /* Mobile IPv6 DHAAD */ #define ICMP6_MIP6_DHAAD_REPLY 145 /* Mobile IPv6 DHAAD */ #define ICMP6_MIP6_MPS 146 /* Mobile IPv6 MPS */ #define ICMP6_MIP6_MPA 147 /* Mobile IPv6 MPA */ #define ICMP6_CERT_PATH_SOL 148 /* Certification Path Solicitation Message [RFC3971] */ #define ICMP6_CERT_PATH_AD 149 /* Certification Path Advertisement Message [RFC3971] */ #define ICMP6_EXPERIMENTAL_MOBILITY 150 /* ICMP Experimental Mobility Protocol Type */ #define ICMP6_MCAST_ROUTER_ADVERT 151 /* Multicast Router Advertisement [RFC4286] */ #define ICMP6_MCAST_ROUTER_SOLICIT 152 /* Multicast Router Solicitation [RFC4286] */ #define ICMP6_MCAST_ROUTER_TERM 153 /* Multicast Router Termination [RFC4286] */ #define ICMP6_FMIPV6_MESSAGES 154 /* FMIPv6 Messages [RFC-ietf-mipshop-rfc5268bis-01.txt] */ #define ICMP6_RPL_CONTROL 155 /* RPL control messages [draft-ietf-roll-rpl-12.txt] */ /* (Pending IANA Assignment) */ #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(obsolete) */ #define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /* beyond scope of source address */ #define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */ #define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */ #define ICMP6_DST_UNREACH_INGR_EGR 5 /* source address failed ingress/egress policy */ #define ICMP6_DST_UNREACH_REJECT 6 /* reject route to destination */ #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_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */ #define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */ #define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */ #define ICMP6_NI_SUCCESS 0 /* node information successful reply */ #define ICMP6_NI_REFUSED 1 /* node information request is refused */ #define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */ #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 */ /* * 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_FLAG_HOME_AGENT 0x20 /* * Router preference values based on RFC4191. */ #define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */ #define ND_RA_FLAG_RESERV_MASK 0xE7 /* 11100111 */ #define ND_RA_FLAG_RTPREF_HIGH 0x01 #define ND_RA_FLAG_RTPREF_MEDIUM 0x00 #define ND_RA_FLAG_RTPREF_LOW 0x03 #define ND_RA_FLAG_RTPREF_RSV 0x02 #define ND_RA_FLAG_ND_PROXY 0x04 /* RFC 4389 */ #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] #define ND_NA_FLAG_ROUTER 0x80000000 #define ND_NA_FLAG_SOLICITED 0x40000000 #define ND_NA_FLAG_OVERRIDE 0x20000000 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_OPT_PI_FLAG_ONLINK 0x80 #define ND_OPT_PI_FLAG_AUTO 0x40 #define ND_OPT_PI_FLAG_ROUTER 0x20 #define ND_OPT_PI_FLAG_SITEPREF 0x10 #define ND_OPT_MAP_FLAG_R 0x80 #define ND_OPT_MAP_FLAG_M 0x40 #define ND_OPT_MAP_FLAG_I 0x20 #define ND_OPT_MAP_FLAG_T 0x10 #define ND_OPT_MAP_FLAG_P 0x08 #define ND_OPT_MAP_FLAG_V 0x04 #define ND_OPT_6CO_FLAG_C 0x10 #define ND_OPT_6CO_FLAG_CID 0x0F #define ND_OPT_6CO_FLAG_RESERVED 0xE0 /* * icmp6 node information */ struct icmp6_nodeinfo { struct icmp6_hdr icmp6_ni_hdr; guint8 icmp6_ni_nonce[8]; /* could be followed by reply data */ }; #define ni_type icmp6_ni_hdr.icmp6_type #define ni_code icmp6_ni_hdr.icmp6_code #define ni_cksum icmp6_ni_hdr.icmp6_cksum #define ni_qtype icmp6_ni_hdr.icmp6_data16[0] #define ni_flags icmp6_ni_hdr.icmp6_data16[1] /* * FMIPv6 */ #define FMIP6_SUBTYPE_RTSOLPR 2 /* Router Solicitation for Proxy Advertisement */ #define FMIP6_RTSOLPR_CODE 0 /* Currently the only code for RTSOLPR */ #define FMIP6_SUBTYPE_PRRTADV 3 /* Proxy Router Advertisement */ #define FMIP6_PRRTADV_MNTUP 0 /* MN should use AP-ID, AR-info tuple */ #define FMIP6_PRRTADV_NI_HOVER 1 /* LLA of the AP is present, Network Initiated Handover trigger */ #define FMIP6_PRRTADV_NORTINFO 2 /* No new router information is present */ #define FMIP6_PRRTADV_LIMRTINFO 3 /* Limited new router information is present */ #define FMIP6_PRRTADV_UNSOL 4 /* Subnet info for neighbor Access Points are sent unsolicited */ #define FMIP6_SUBTYPE_HI 4 /* Handover Initiate */ #define FMIP6_HI_PCOA 0 /* PAR receives FBU with PCoA as source IP address */ #define FMIP6_HI_NOTPCOA 1 /* PAR receives FBU whose source IP address is not PCoA */ #define FMIP6_SUBTYPE_HACK 5 /* Handover Acknowledge */ #define FMIP6_HACK_VALID 0 /* Handover Accepted, NCoA valid */ #define FMIP6_HACK_INVALID 1 /* Handover Accepted, NCoA not valid */ #define FMIP6_HACK_INUSE 2 /* Handover Accepted, NCoA in use */ #define FMIP6_HACK_ASSIGNED 3 /* Handover Accepted, NCoA assigned */ #define FMIP6_HACK_NOTASSIGNED 4 /* Handover Accepted, NCoA not assigned */ #define FMIP6_HACK_NOTACCEPTED 128 /* Handover Not Accepted, reason unspecified */ #define FMIP6_HACK_PROHIBITED 129 /* Administratively prohibited */ #define FMIP6_HACK_INSUFFICIENT 130 /* Insufficient resources */ /* Fast Handover Mobile IPv6 extension: Router Solicitation for Proxy Advertisement (RtSolPr). */ struct fmip6_rtsolpr { struct icmp6_hdr fmip6_rtsolpr_hdr; }; #define fmip6_rtsolpr_type fmip6_rtsolpr_hdr.icmp6_type #define fmip6_rtsolpr_code fmip6_rtsolpr_hdr.icmp6_code #define fmip6_rtsolpr_cksum fmip6_rtsolpr_hdr.icmp6_cksum #define fmip6_rtsolpr_subtype fmip6_rtsolpr_hdr.icmp6_data8[0] #define fmip6_rtsolpr_reserved fmip6_rtsolpr_hdr.icmp6_data8[1] #define fmip6_rtsolpr_id fmip6_rtsolpr_hdr.icmp6_data16[1] /* Fast Handover Mobile IPv6 extension: Proxy Router Advertisement (PrRtAdv). */ struct fmip6_prrtadv { struct icmp6_hdr fmip6_prrtadv_hdr; }; #define fmip6_prrtadv_type fmip6_prrtadv_hdr.icmp6_type #define fmip6_prrtadv_code fmip6_prrtadv_hdr.icmp6_code #define fmip6_prrtadv_cksum fmip6_prrtadv_hdr.icmp6_cksum #define fmip6_prrtadv_subtype fmip6_prrtadv_hdr.icmp6_data8[0] #define fmip6_prrtadv_reserved fmip6_prrtadv_hdr.icmp6_data8[1] #define fmip6_prrtadv_id fmip6_prrtadv_hdr.icmp6_data16[1] /* Fast Handover Mobile IPv6 extension: Handover Initiate (HI). */ struct fmip6_hi { struct icmp6_hdr fmip6_hi_hdr; }; #define fmip6_hi_type fmip6_hi_hdr.icmp6_type #define fmip6_hi_code fmip6_hi_hdr.icmp6_code #define fmip6_hi_cksum fmip6_hi_hdr.icmp6_cksum #define fmip6_hi_subtype fmip6_hi_hdr.icmp6_data8[0] #define fmip6_hi_flags_reserved fmip6_hi_hdr.icmp6_data8[1] #define fmip6_hi_id fmip6_hi_hdr.icmp6_data16[1] #define FMIP_HI_FLAG_ASSIGNED 0x80 #define FMIP_HI_FLAG_BUFFER 0x40 /* Fast Handover Mobile IPv6 extension: Handover Acknowledge (HAck). */ struct fmip6_hack { struct icmp6_hdr fmip6_hack_hdr; }; #define fmip6_hack_type fmip6_hack_hdr.icmp6_type #define fmip6_hack_code fmip6_hack_hdr.icmp6_code #define fmip6_hack_cksum fmip6_hack_hdr.icmp6_cksum #define fmip6_hack_subtype fmip6_hack_hdr.icmp6_data8[0] #define fmip6_hack_reserved fmip6_hack_hdr.icmp6_data8[1] #define fmip6_hack_id fmip6_hack_hdr.icmp6_data16[1] struct fmip6_opt_hdr { guint8 fmip6_opt_type; guint8 fmip6_opt_len; /* size of this option in 8 octets including opt_hdr */ guint8 fmip6_opt_optcode; /* Option-Code see the definition below */ }; void capture_ipv6(const guchar *, int, int, packet_counts *); #endif /* __PACKET_IPV6_H_DEFINED__ */