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
  30 struct 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  */
  47 #ifdef __KERNEL__
  48 extern const struct in6_addr in6addr_any;
  49 #define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
  50 extern const struct in6_addr in6addr_loopback;
  51 #define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
  52 extern 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 } } }
  55 extern 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
  60 struct 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
  68 struct 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
  78 struct 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