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