include/uapi/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 #include <linux/libc-compat.h>
  26
  27 /*
  28  *      IPv6 address structure
  29  */
  30
  31 #if __UAPI_DEF_IN6_ADDR
  32 struct in6_addr {
  33         union {
  34                 __u8            u6_addr8[16];
  35 #if __UAPI_DEF_IN6_ADDR_ALT
  36                 __be16          u6_addr16[8];
  37                 __be32          u6_addr32[4];
  38 #endif
  39         } in6_u;
  40 #define s6_addr                 in6_u.u6_addr8
  41 #if __UAPI_DEF_IN6_ADDR_ALT
  42 #define s6_addr16               in6_u.u6_addr16
  43 #define s6_addr32               in6_u.u6_addr32
  44 #endif
  45 };
  46 #endif /* __UAPI_DEF_IN6_ADDR */
  47
  48 #if __UAPI_DEF_SOCKADDR_IN6
  49 struct sockaddr_in6 {
  50         unsigned short int      sin6_family;    /* AF_INET6 */
  51         __be16                  sin6_port;      /* Transport layer port # */
  52         __be32                  sin6_flowinfo;  /* IPv6 flow information */
  53         struct in6_addr         sin6_addr;      /* IPv6 address */
  54         __u32                   sin6_scope_id;  /* scope id (new in RFC2553) */
  55 };
  56 #endif /* __UAPI_DEF_SOCKADDR_IN6 */
  57
  58 #if __UAPI_DEF_IPV6_MREQ
  59 struct ipv6_mreq {
  60         /* IPv6 multicast address of group */
  61         struct in6_addr ipv6mr_multiaddr;
  62
  63         /* local IPv6 address of interface */
  64         int             ipv6mr_ifindex;
  65 };
  66 #endif /* __UAPI_DEF_IVP6_MREQ */
  67
  68 #define ipv6mr_acaddr   ipv6mr_multiaddr
  69
  70 struct in6_flowlabel_req {
  71         struct in6_addr flr_dst;
  72         __be32  flr_label;
  73         __u8    flr_action;
  74         __u8    flr_share;
  75         __u16   flr_flags;
  76         __u16   flr_expires;
  77         __u16   flr_linger;
  78         __u32   __flr_pad;
  79         /* Options in format of IPV6_PKTOPTIONS */
  80 };
  81
  82 #define IPV6_FL_A_GET   0
  83 #define IPV6_FL_A_PUT   1
  84 #define IPV6_FL_A_RENEW 2
  85
  86 #define IPV6_FL_F_CREATE        1
  87 #define IPV6_FL_F_EXCL          2
  88 #define IPV6_FL_F_REFLECT       4
  89 #define IPV6_FL_F_REMOTE        8
  90
  91 #define IPV6_FL_S_NONE          0
  92 #define IPV6_FL_S_EXCL          1
  93 #define IPV6_FL_S_PROCESS       2
  94 #define IPV6_FL_S_USER          3
  95 #define IPV6_FL_S_ANY           255
  96
  97
  98 /*
  99  *      Bitmask constant declarations to help applications select out the
 100  *      flow label and priority fields.
 101  *
 102  *      Note that this are in host byte order while the flowinfo field of
 103  *      sockaddr_in6 is in network byte order.
 104  */
 105
 106 #define IPV6_FLOWINFO_FLOWLABEL         0x000fffff
 107 #define IPV6_FLOWINFO_PRIORITY          0x0ff00000
 108
 109 /* These definitions are obsolete */
 110 #define IPV6_PRIORITY_UNCHARACTERIZED   0x0000
 111 #define IPV6_PRIORITY_FILLER            0x0100
 112 #define IPV6_PRIORITY_UNATTENDED        0x0200
 113 #define IPV6_PRIORITY_RESERVED1         0x0300
 114 #define IPV6_PRIORITY_BULK              0x0400
 115 #define IPV6_PRIORITY_RESERVED2         0x0500
 116 #define IPV6_PRIORITY_INTERACTIVE       0x0600
 117 #define IPV6_PRIORITY_CONTROL           0x0700
 118 #define IPV6_PRIORITY_8                 0x0800
 119 #define IPV6_PRIORITY_9                 0x0900
 120 #define IPV6_PRIORITY_10                0x0a00
 121 #define IPV6_PRIORITY_11                0x0b00
 122 #define IPV6_PRIORITY_12                0x0c00
 123 #define IPV6_PRIORITY_13                0x0d00
 124 #define IPV6_PRIORITY_14                0x0e00
 125 #define IPV6_PRIORITY_15                0x0f00
 126
 127 /*
 128  *      IPV6 extension headers
 129  */
 130 #if __UAPI_DEF_IPPROTO_V6
 131 #define IPPROTO_HOPOPTS         0       /* IPv6 hop-by-hop options      */
 132 #define IPPROTO_ROUTING         43      /* IPv6 routing header          */
 133 #define IPPROTO_FRAGMENT        44      /* IPv6 fragmentation header    */
 134 #define IPPROTO_ICMPV6          58      /* ICMPv6                       */
 135 #define IPPROTO_NONE            59      /* IPv6 no next header          */
 136 #define IPPROTO_DSTOPTS         60      /* IPv6 destination options     */
 137 #define IPPROTO_MH              135     /* IPv6 mobility header         */
 138 #endif /* __UAPI_DEF_IPPROTO_V6 */
 139
 140 /*
 141  *      IPv6 TLV options.
 142  */
 143 #define IPV6_TLV_PAD1           0
 144 #define IPV6_TLV_PADN           1
 145 #define IPV6_TLV_ROUTERALERT    5
 146 #define IPV6_TLV_CALIPSO        7       /* RFC 5570 */
 147 #define IPV6_TLV_JUMBO          194
 148 #define IPV6_TLV_HAO            201     /* home address option */
 149
 150 /*
 151  *      IPV6 socket options
 152  */
 153 #if __UAPI_DEF_IPV6_OPTIONS
 154 #define IPV6_ADDRFORM           1
 155 #define IPV6_2292PKTINFO        2
 156 #define IPV6_2292HOPOPTS        3
 157 #define IPV6_2292DSTOPTS        4
 158 #define IPV6_2292RTHDR          5
 159 #define IPV6_2292PKTOPTIONS     6
 160 #define IPV6_CHECKSUM           7
 161 #define IPV6_2292HOPLIMIT       8
 162 #define IPV6_NEXTHOP            9
 163 #define IPV6_AUTHHDR            10      /* obsolete */
 164 #define IPV6_FLOWINFO           11
 165
 166 #define IPV6_UNICAST_HOPS       16
 167 #define IPV6_MULTICAST_IF       17
 168 #define IPV6_MULTICAST_HOPS     18
 169 #define IPV6_MULTICAST_LOOP     19
 170 #define IPV6_ADD_MEMBERSHIP     20
 171 #define IPV6_DROP_MEMBERSHIP    21
 172 #define IPV6_ROUTER_ALERT       22
 173 #define IPV6_MTU_DISCOVER       23
 174 #define IPV6_MTU                24
 175 #define IPV6_RECVERR            25
 176 #define IPV6_V6ONLY             26
 177 #define IPV6_JOIN_ANYCAST       27
 178 #define IPV6_LEAVE_ANYCAST      28
 179
 180 /* IPV6_MTU_DISCOVER values */
 181 #define IPV6_PMTUDISC_DONT              0
 182 #define IPV6_PMTUDISC_WANT              1
 183 #define IPV6_PMTUDISC_DO                2
 184 #define IPV6_PMTUDISC_PROBE             3
 185 /* same as IPV6_PMTUDISC_PROBE, provided for symetry with IPv4
 186  * also see comments on IP_PMTUDISC_INTERFACE
 187  */
 188 #define IPV6_PMTUDISC_INTERFACE         4
 189 /* weaker version of IPV6_PMTUDISC_INTERFACE, which allows packets to
 190  * get fragmented if they exceed the interface mtu
 191  */
 192 #define IPV6_PMTUDISC_OMIT              5
 193
 194 /* Flowlabel */
 195 #define IPV6_FLOWLABEL_MGR      32
 196 #define IPV6_FLOWINFO_SEND      33
 197
 198 #define IPV6_IPSEC_POLICY       34
 199 #define IPV6_XFRM_POLICY        35
 200 #define IPV6_HDRINCL            36
 201 #endif
 202
 203 /*
 204  * Multicast:
 205  * Following socket options are shared between IPv4 and IPv6.
 206  *
 207  * MCAST_JOIN_GROUP             42
 208  * MCAST_BLOCK_SOURCE           43
 209  * MCAST_UNBLOCK_SOURCE         44
 210  * MCAST_LEAVE_GROUP            45
 211  * MCAST_JOIN_SOURCE_GROUP      46
 212  * MCAST_LEAVE_SOURCE_GROUP     47
 213  * MCAST_MSFILTER               48
 214  */
 215
 216 /*
 217  * Advanced API (RFC3542) (1)
 218  *
 219  * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c.
 220  */
 221
 222 #define IPV6_RECVPKTINFO        49
 223 #define IPV6_PKTINFO            50
 224 #define IPV6_RECVHOPLIMIT       51
 225 #define IPV6_HOPLIMIT           52
 226 #define IPV6_RECVHOPOPTS        53
 227 #define IPV6_HOPOPTS            54
 228 #define IPV6_RTHDRDSTOPTS       55
 229 #define IPV6_RECVRTHDR          56
 230 #define IPV6_RTHDR              57
 231 #define IPV6_RECVDSTOPTS        58
 232 #define IPV6_DSTOPTS            59
 233 #define IPV6_RECVPATHMTU        60
 234 #define IPV6_PATHMTU            61
 235 #define IPV6_DONTFRAG           62
 236 #if 0   /* not yet */
 237 #define IPV6_USE_MIN_MTU        63
 238 #endif
 239
 240 /*
 241  * Netfilter (1)
 242  *
 243  * Following socket options are used in ip6_tables;
 244  * see include/linux/netfilter_ipv6/ip6_tables.h.
 245  *
 246  * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO               64
 247  * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES       65
 248  */
 249
 250 /*
 251  * Advanced API (RFC3542) (2)
 252  */
 253 #define IPV6_RECVTCLASS         66
 254 #define IPV6_TCLASS             67
 255
 256 /*
 257  * Netfilter (2)
 258  *
 259  * Following socket options are used in ip6_tables;
 260  * see include/linux/netfilter_ipv6/ip6_tables.h.
 261  *
 262  * IP6T_SO_GET_REVISION_MATCH   68
 263  * IP6T_SO_GET_REVISION_TARGET  69
 264  * IP6T_SO_ORIGINAL_DST         80
 265  */
 266
 267 #define IPV6_AUTOFLOWLABEL      70
 268 /* RFC5014: Source address selection */
 269 #define IPV6_ADDR_PREFERENCES   72
 270
 271 #define IPV6_PREFER_SRC_TMP             0x0001
 272 #define IPV6_PREFER_SRC_PUBLIC          0x0002
 273 #define IPV6_PREFER_SRC_PUBTMP_DEFAULT  0x0100
 274 #define IPV6_PREFER_SRC_COA             0x0004
 275 #define IPV6_PREFER_SRC_HOME            0x0400
 276 #define IPV6_PREFER_SRC_CGA             0x0008
 277 #define IPV6_PREFER_SRC_NONCGA          0x0800
 278
 279 /* RFC5082: Generalized Ttl Security Mechanism */
 280 #define IPV6_MINHOPCOUNT                73
 281
 282 #define IPV6_ORIGDSTADDR        74
 283 #define IPV6_RECVORIGDSTADDR    IPV6_ORIGDSTADDR
 284 #define IPV6_TRANSPARENT        75
 285 #define IPV6_UNICAST_IF         76
 286 #define IPV6_RECVFRAGSIZE       77
 287
 288 /*
 289  * Multicast Routing:
 290  * see include/uapi/linux/mroute6.h.
 291  *
 292  * MRT6_BASE                    200
 293  * ...
 294  * MRT6_MAX
 295  */
 296 #endif /* _LINUX_IN6_H */