linux/include/linux/in6.h
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   1/*
   2 *      Types and definitions for AF_INET6 
   3 *      Linux INET6 implementation 
   4 *
   5 *      Authors:
   6 *      Pedro Roque             <roque@di.fc.ul.pt>     
   7 *
   8 *      Sources:
   9 *      IPv6 Program Interfaces for BSD Systems
  10 *      <draft-ietf-ipngwg-bsd-api-05.txt>
  11 *
  12 *      Advanced Sockets API for IPv6
  13 *      <draft-stevens-advanced-api-00.txt>
  14 *
  15 *      This program is free software; you can redistribute it and/or
  16 *      modify it under the terms of the GNU General Public License
  17 *      as published by the Free Software Foundation; either version
  18 *      2 of the License, or (at your option) any later version.
  19 */
  20
  21#ifndef _LINUX_IN6_H
  22#define _LINUX_IN6_H
  23
  24#include <linux/types.h>
  25
  26/*
  27 *      IPv6 address structure
  28 */
  29
  30struct in6_addr {
  31        union {
  32                __u8            u6_addr8[16];
  33                __be16          u6_addr16[8];
  34                __be32          u6_addr32[4];
  35        } in6_u;
  36#define s6_addr                 in6_u.u6_addr8
  37#define s6_addr16               in6_u.u6_addr16
  38#define s6_addr32               in6_u.u6_addr32
  39};
  40
  41/* IPv6 Wildcard Address (::) and Loopback Address (::1) defined in RFC2553
  42 * NOTE: Be aware the IN6ADDR_* constants and in6addr_* externals are defined
  43 * in network byte order, not in host byte order as are the IPv4 equivalents
  44 */
  45#ifdef __KERNEL__
  46extern const struct in6_addr in6addr_any;
  47#define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
  48extern const struct in6_addr in6addr_loopback;
  49#define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
  50extern const struct in6_addr in6addr_linklocal_allnodes;
  51#define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
  52                { { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
  53extern const struct in6_addr in6addr_linklocal_allrouters;
  54#define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
  55                { { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2 } } }
  56#endif
  57
  58struct sockaddr_in6 {
  59        unsigned short int      sin6_family;    /* AF_INET6 */
  60        __be16                  sin6_port;      /* Transport layer port # */
  61        __be32                  sin6_flowinfo;  /* IPv6 flow information */
  62        struct in6_addr         sin6_addr;      /* IPv6 address */
  63        __u32                   sin6_scope_id;  /* scope id (new in RFC2553) */
  64};
  65
  66struct ipv6_mreq {
  67        /* IPv6 multicast address of group */
  68        struct in6_addr ipv6mr_multiaddr;
  69
  70        /* local IPv6 address of interface */
  71        int             ipv6mr_ifindex;
  72};
  73
  74#define ipv6mr_acaddr   ipv6mr_multiaddr
  75
  76struct in6_flowlabel_req {
  77        struct in6_addr flr_dst;
  78        __be32  flr_label;
  79        __u8    flr_action;
  80        __u8    flr_share;
  81        __u16   flr_flags;
  82        __u16   flr_expires;
  83        __u16   flr_linger;
  84        __u32   __flr_pad;
  85        /* Options in format of IPV6_PKTOPTIONS */
  86};
  87
  88#define IPV6_FL_A_GET   0
  89#define IPV6_FL_A_PUT   1
  90#define IPV6_FL_A_RENEW 2
  91
  92#define IPV6_FL_F_CREATE        1
  93#define IPV6_FL_F_EXCL          2
  94
  95#define IPV6_FL_S_NONE          0
  96#define IPV6_FL_S_EXCL          1
  97#define IPV6_FL_S_PROCESS       2
  98#define IPV6_FL_S_USER          3
  99#define IPV6_FL_S_ANY           255
 100
 101
 102/*
 103 *      Bitmask constant declarations to help applications select out the 
 104 *      flow label and priority fields.
 105 *
 106 *      Note that this are in host byte order while the flowinfo field of
 107 *      sockaddr_in6 is in network byte order.
 108 */
 109
 110#define IPV6_FLOWINFO_FLOWLABEL         0x000fffff
 111#define IPV6_FLOWINFO_PRIORITY          0x0ff00000
 112
 113/* These definitions are obsolete */
 114#define IPV6_PRIORITY_UNCHARACTERIZED   0x0000
 115#define IPV6_PRIORITY_FILLER            0x0100
 116#define IPV6_PRIORITY_UNATTENDED        0x0200
 117#define IPV6_PRIORITY_RESERVED1         0x0300
 118#define IPV6_PRIORITY_BULK              0x0400
 119#define IPV6_PRIORITY_RESERVED2         0x0500
 120#define IPV6_PRIORITY_INTERACTIVE       0x0600
 121#define IPV6_PRIORITY_CONTROL           0x0700
 122#define IPV6_PRIORITY_8                 0x0800
 123#define IPV6_PRIORITY_9                 0x0900
 124#define IPV6_PRIORITY_10                0x0a00
 125#define IPV6_PRIORITY_11                0x0b00
 126#define IPV6_PRIORITY_12                0x0c00
 127#define IPV6_PRIORITY_13                0x0d00
 128#define IPV6_PRIORITY_14                0x0e00
 129#define IPV6_PRIORITY_15                0x0f00
 130
 131/*
 132 *      IPV6 extension headers
 133 */
 134#define IPPROTO_HOPOPTS         0       /* IPv6 hop-by-hop options      */
 135#define IPPROTO_ROUTING         43      /* IPv6 routing header          */
 136#define IPPROTO_FRAGMENT        44      /* IPv6 fragmentation header    */
 137#define IPPROTO_ICMPV6          58      /* ICMPv6                       */
 138#define IPPROTO_NONE            59      /* IPv6 no next header          */
 139#define IPPROTO_DSTOPTS         60      /* IPv6 destination options     */
 140#define IPPROTO_MH              135     /* IPv6 mobility header         */
 141
 142/*
 143 *      IPv6 TLV options.
 144 */
 145#define IPV6_TLV_PAD0           0
 146#define IPV6_TLV_PADN           1
 147#define IPV6_TLV_ROUTERALERT    5
 148#define IPV6_TLV_JUMBO          194
 149#define IPV6_TLV_HAO            201     /* home address option */
 150
 151/*
 152 *      IPV6 socket options
 153 */
 154
 155#define IPV6_ADDRFORM           1
 156#define IPV6_2292PKTINFO        2
 157#define IPV6_2292HOPOPTS        3
 158#define IPV6_2292DSTOPTS        4
 159#define IPV6_2292RTHDR          5
 160#define IPV6_2292PKTOPTIONS     6
 161#define IPV6_CHECKSUM           7
 162#define IPV6_2292HOPLIMIT       8
 163#define IPV6_NEXTHOP            9
 164#define IPV6_AUTHHDR            10      /* obsolete */
 165#define IPV6_FLOWINFO           11
 166
 167#define IPV6_UNICAST_HOPS       16
 168#define IPV6_MULTICAST_IF       17
 169#define IPV6_MULTICAST_HOPS     18
 170#define IPV6_MULTICAST_LOOP     19
 171#define IPV6_ADD_MEMBERSHIP     20
 172#define IPV6_DROP_MEMBERSHIP    21
 173#define IPV6_ROUTER_ALERT       22
 174#define IPV6_MTU_DISCOVER       23
 175#define IPV6_MTU                24
 176#define IPV6_RECVERR            25
 177#define IPV6_V6ONLY             26
 178#define IPV6_JOIN_ANYCAST       27
 179#define IPV6_LEAVE_ANYCAST      28
 180
 181/* IPV6_MTU_DISCOVER values */
 182#define IPV6_PMTUDISC_DONT              0
 183#define IPV6_PMTUDISC_WANT              1
 184#define IPV6_PMTUDISC_DO                2
 185#define IPV6_PMTUDISC_PROBE             3
 186
 187/* Flowlabel */
 188#define IPV6_FLOWLABEL_MGR      32
 189#define IPV6_FLOWINFO_SEND      33
 190
 191#define IPV6_IPSEC_POLICY       34
 192#define IPV6_XFRM_POLICY        35
 193
 194/*
 195 * Multicast:
 196 * Following socket options are shared between IPv4 and IPv6.
 197 *
 198 * MCAST_JOIN_GROUP             42
 199 * MCAST_BLOCK_SOURCE           43
 200 * MCAST_UNBLOCK_SOURCE         44
 201 * MCAST_LEAVE_GROUP            45
 202 * MCAST_JOIN_SOURCE_GROUP      46
 203 * MCAST_LEAVE_SOURCE_GROUP     47
 204 * MCAST_MSFILTER               48
 205 */
 206
 207/*
 208 * Advanced API (RFC3542) (1)
 209 *
 210 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c.
 211 */
 212
 213#define IPV6_RECVPKTINFO        49
 214#define IPV6_PKTINFO            50
 215#define IPV6_RECVHOPLIMIT       51
 216#define IPV6_HOPLIMIT           52
 217#define IPV6_RECVHOPOPTS        53
 218#define IPV6_HOPOPTS            54
 219#define IPV6_RTHDRDSTOPTS       55
 220#define IPV6_RECVRTHDR          56
 221#define IPV6_RTHDR              57
 222#define IPV6_RECVDSTOPTS        58
 223#define IPV6_DSTOPTS            59
 224#define IPV6_RECVPATHMTU        60
 225#define IPV6_PATHMTU            61
 226#define IPV6_DONTFRAG           62
 227#if 0   /* not yet */
 228#define IPV6_USE_MIN_MTU        63
 229#endif
 230
 231/*
 232 * Netfilter (1)
 233 *
 234 * Following socket options are used in ip6_tables;
 235 * see include/linux/netfilter_ipv6/ip6_tables.h.
 236 *
 237 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO               64
 238 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES       65
 239 */
 240
 241/*
 242 * Advanced API (RFC3542) (2)
 243 */
 244#define IPV6_RECVTCLASS         66
 245#define IPV6_TCLASS             67
 246
 247/*
 248 * Netfilter (2)
 249 *
 250 * Following socket options are used in ip6_tables;
 251 * see include/linux/netfilter_ipv6/ip6_tables.h.
 252 *
 253 * IP6T_SO_GET_REVISION_MATCH   68
 254 * IP6T_SO_GET_REVISION_TARGET  69
 255 */
 256
 257/* RFC5014: Source address selection */
 258#define IPV6_ADDR_PREFERENCES   72
 259
 260#define IPV6_PREFER_SRC_TMP             0x0001
 261#define IPV6_PREFER_SRC_PUBLIC          0x0002
 262#define IPV6_PREFER_SRC_PUBTMP_DEFAULT  0x0100
 263#define IPV6_PREFER_SRC_COA             0x0004
 264#define IPV6_PREFER_SRC_HOME            0x0400
 265#define IPV6_PREFER_SRC_CGA             0x0008
 266#define IPV6_PREFER_SRC_NONCGA          0x0800
 267
 268/* RFC5082: Generalized Ttl Security Mechanism */
 269#define IPV6_MINHOPCOUNT                73
 270
 271/*
 272 * Multicast Routing:
 273 * see include/linux/mroute6.h.
 274 *
 275 * MRT6_INIT                    200
 276 * MRT6_DONE                    201
 277 * MRT6_ADD_MIF                 202
 278 * MRT6_DEL_MIF                 203
 279 * MRT6_ADD_MFC                 204
 280 * MRT6_DEL_MFC                 205
 281 * MRT6_VERSION                 206
 282 * MRT6_ASSERT                  207
 283 * MRT6_PIM                     208
 284 * (reserved)                   209
 285 */
 286#endif
 287
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