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         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__
  46 extern 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 } } }
  48 extern 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 } } }
  50 extern 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 } } }
  53 extern 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
  58 struct 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
  66 struct 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
  76 struct 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 #define IPV6_ORIGDSTADDR        74
 272 #define IPV6_RECVORIGDSTADDR    IPV6_ORIGDSTADDR
 273 #define IPV6_TRANSPARENT        75
 274
 275 /*
 276  * Multicast Routing:
 277  * see include/linux/mroute6.h.
 278  *
 279  * MRT6_INIT                    200
 280  * MRT6_DONE                    201
 281  * MRT6_ADD_MIF                 202
 282  * MRT6_DEL_MIF                 203
 283  * MRT6_ADD_MFC                 204
 284  * MRT6_DEL_MFC                 205
 285  * MRT6_VERSION                 206
 286  * MRT6_ASSERT                  207
 287  * MRT6_PIM                     208
 288  * (reserved)                   209
 289  */
 290 #endif