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Diffstat (limited to 'epan/dissectors/packet-ipv6.h')
| -rw-r--r-- | epan/dissectors/packet-ipv6.h | 540 |
1 files changed, 540 insertions, 0 deletions
diff --git a/epan/dissectors/packet-ipv6.h b/epan/dissectors/packet-ipv6.h new file mode 100644 index 0000000000..693e8f6543 --- /dev/null +++ b/epan/dissectors/packet-ipv6.h @@ -0,0 +1,540 @@ +/* packet-ipv6.h + * Definitions for IPv6 packet disassembly + * + * $Id$ + * + * 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 */ +#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 : draft-vida-mld-v2-08.txt */ + +#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_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__ */ |