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wireshark/packet-ipv6.h

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/* packet-ipv6.h
* Definitions for IPv6 packet disassembly
*
* $Id: packet-ipv6.h,v 1.32 2003/12/19 23:20:53 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
*
* Copyright 1998 Gerald Combs
*
* MobileIPv6 support added by Tomislav Borosa <tomislav.borosa@siemens.hr>
*
* HMIPv6 support added by Martti Kuparinen <martti.kuparinen@iki.fi>
*
* 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>
#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
/* 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 */
};
#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 */
/* The definitions below are experimental. TBA */
#define MLD6_MTRACE_RESP 141 /* mtrace response(to sender) */
#define MLD6_MTRACE 142 /* mtrace messages */
#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_MLDV2_REPORT 206 /* MLD v2 report message : draft-vida-mld-v2-03.txt */
#define ICMP6_MAXTYPE 153
#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_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 */
/*
* 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_FLAG_HOME_AGENT 0x20
/*
* Router preference values based on draft-draves-ipngwg-router-selection-01.
* These are non-standard definitions.
*/
#define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
#define ND_RA_FLAG_RTPREF_HIGH 0x08 /* 00001000 */
#define ND_RA_FLAG_RTPREF_MEDIUM 0x00 /* 00000000 */
#define ND_RA_FLAG_RTPREF_LOW 0x18 /* 00011000 */
#define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */
#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_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
#define ND_OPT_ADVINTERVAL 7
#define ND_OPT_HOMEAGENT_INFO 8
#define ND_OPT_SOURCE_ADDRLIST 9
#define ND_OPT_TARGET_ADDRLIST 10
/* draft-ietf-ipngwg-router-preference, not officially assigned yet */
#define ND_OPT_ROUTE_INFO 200
/* draft-ietf-mobileip-hmipv6, not officially assigned yet */
#define ND_OPT_MAP 201
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
#define ND_OPT_PI_FLAG_ROUTER 0x20
#define ND_OPT_PI_FLAG_SITEPREF 0x10
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;
};
struct nd_opt_adv_int { /* Advertisement Interval option */
guint8 nd_opt_adv_int_type;
guint8 nd_opt_adv_int_len;
guint16 nd_opt_adv_int_reserved;
guint32 nd_opt_adv_int_advint;
};
struct nd_opt_ha_info { /* Home Agent Information option */
guint8 nd_opt_ha_info_type;
guint8 nd_opt_ha_info_len;
guint16 nd_opt_ha_info_reserved;
guint16 nd_opt_ha_info_ha_pref;
guint16 nd_opt_ha_info_ha_life;
};
struct nd_opt_route_info { /* route info */
guint8 nd_opt_rti_type;
guint8 nd_opt_rti_len;
guint8 nd_opt_rti_prefixlen;
guint8 nd_opt_rti_flags;
guint32 nd_opt_rti_lifetime;
/* prefix follows */
};
struct nd_opt_map_info { /* HMIPv6 MAP option */
guint8 nd_opt_map_type;
guint8 nd_opt_map_len;
guint8 nd_opt_map_dist_and_pref;
guint8 nd_opt_map_flags;
guint32 nd_opt_map_lifetime;
struct e_in6_addr nd_opt_map_address;
};
#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
/*
* 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]
#define NI_QTYPE_NOOP 0 /* NOOP */
#define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes */
#define NI_QTYPE_FQDN 2 /* FQDN (draft 04) */
#define NI_QTYPE_DNSNAME 2 /* DNS Name */
#define NI_QTYPE_NODEADDR 3 /* Node Addresses */
#define NI_QTYPE_IPV4ADDR 4 /* IPv4 Addresses */
#define NI_SUPTYPE_FLAG_COMPRESS 0x1
#define NI_FQDN_FLAG_VALIDTTL 0x1
#define NI_NODEADDR_FLAG_TRUNCATE 0x1
#define NI_NODEADDR_FLAG_ALL 0x2
#define NI_NODEADDR_FLAG_COMPAT 0x4
#define NI_NODEADDR_FLAG_LINKLOCAL 0x8
#define NI_NODEADDR_FLAG_SITELOCAL 0x10
#define NI_NODEADDR_FLAG_GLOBAL 0x20
#define NI_NODEADDR_FLAG_ANYCAST 0x40 /* just experimental. not in spec */
struct ni_reply_fqdn {
guint32 ni_fqdn_ttl; /* TTL */
guint8 ni_fqdn_namelen; /* length in octets of the FQDN */
guint8 ni_fqdn_name[3]; /* XXX: alignment */
};
/*
* Router Renumbering. as router-renum-05.txt
*/
struct icmp6_router_renum { /* router renumbering header */
struct icmp6_hdr rr_hdr;
guint8 rr_segnum;
guint8 rr_flags;
guint16 rr_maxdelay;
guint32 rr_reserved;
};
#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
struct rr_pco_use { /* use prefix part */
guint8 rpu_uselen;
guint8 rpu_keeplen;
guint8 rpu_ramask;
guint8 rpu_raflags;
guint32 rpu_vltime;
guint32 rpu_pltime;
guint32 rpu_flags;
struct e_in6_addr rpu_prefix;
};
#define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x80
#define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x40
/* network endian */
#define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80000000
#define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40000000
struct rr_result { /* router renumbering result message */
guint16 rrr_flags;
guint8 rrr_ordinal;
guint8 rrr_matchedlen;
guint32 rrr_ifid;
struct e_in6_addr rrr_prefix;
};
/* network endian */
#define ICMP6_RR_RESULT_FLAGS_OOB 0x0002
#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0001
void capture_ipv6(const guchar *, int, int, packet_counts *);
#endif /* __PACKET_IPV6_H_DEFINED__ */
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