LXR linux/include/linux/in6.h

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