path: root/epan/dissectors/packet-ipv6.h

/* packet-ipv6.h
 * Definitions for IPv6 packet disassembly
 *
 * $Id$
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 *
 * Copyright 1998 Gerald Combs
 *
 * MobileIPv6 support added by Tomislav Borosa <tomislav.borosa@siemens.hr>
 *
 * HMIPv6 support added by Martti Kuparinen <martti.kuparinen@iki.fi>
 *
 * FMIPv6 support added by Martin Andre <andre@clarinet.u-strasbg.fr>
 *
 * 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 <epan/ipv6-utils.h>

/* 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__ */