in6.h

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/*
 *  Types and definitions for AF_INET6 
 *  Linux INET6 implementation 
 *
 *  Authors:
 *  Pedro Roque     <[email protected]> 
 *
 *  Sources:
 *  IPv6 Program Interfaces for BSD Systems
 *      <draft-ietf-ipngwg-bsd-api-05.txt>
 *
 *  Advanced Sockets API for IPv6
 *  <draft-stevens-advanced-api-00.txt>
 *
 *  This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

#ifndef _UAPI_LINUX_IN6_H
#define _UAPI_LINUX_IN6_H

#include <linux/types.h>

/*
 *  IPv6 address structure
 */

struct in6_addr {
    union {
        __u8        u6_addr8[16];
        __be16      u6_addr16[8];
        __be32      u6_addr32[4];
    } in6_u;
#define s6_addr         in6_u.u6_addr8
#define s6_addr16       in6_u.u6_addr16
#define s6_addr32       in6_u.u6_addr32
};

/* IPv6 Wildcard Address (::) and Loopback Address (::1) defined in RFC2553
 * NOTE: Be aware the IN6ADDR_* constants and in6addr_* externals are defined
 * in network byte order, not in host byte order as are the IPv4 equivalents
 */

struct sockaddr_in6 {
    unsigned short int  sin6_family;    /* AF_INET6 */
    __be16          sin6_port;      /* Transport layer port # */
    __be32          sin6_flowinfo;  /* IPv6 flow information */
    struct in6_addr     sin6_addr;      /* IPv6 address */
    __u32           sin6_scope_id;  /* scope id (new in RFC2553) */
};

struct ipv6_mreq {
    /* IPv6 multicast address of group */
    struct in6_addr ipv6mr_multiaddr;

    /* local IPv6 address of interface */
    int     ipv6mr_ifindex;
};

#define ipv6mr_acaddr   ipv6mr_multiaddr

struct in6_flowlabel_req {
    struct in6_addr flr_dst;
    __be32  flr_label;
    __u8    flr_action;
    __u8    flr_share;
    __u16   flr_flags;
    __u16   flr_expires;
    __u16   flr_linger;
    __u32   __flr_pad;
    /* Options in format of IPV6_PKTOPTIONS */
};

#define IPV6_FL_A_GET   0
#define IPV6_FL_A_PUT   1
#define IPV6_FL_A_RENEW 2

#define IPV6_FL_F_CREATE    1
#define IPV6_FL_F_EXCL      2

#define IPV6_FL_S_NONE      0
#define IPV6_FL_S_EXCL      1
#define IPV6_FL_S_PROCESS   2
#define IPV6_FL_S_USER      3
#define IPV6_FL_S_ANY       255


/*
 *  Bitmask constant declarations to help applications select out the 
 *  flow label and priority fields.
 *
 *  Note that this are in host byte order while the flowinfo field of
 *  sockaddr_in6 is in network byte order.
 */

#define IPV6_FLOWINFO_FLOWLABEL     0x000fffff
#define IPV6_FLOWINFO_PRIORITY      0x0ff00000

/* These definitions are obsolete */
#define IPV6_PRIORITY_UNCHARACTERIZED   0x0000
#define IPV6_PRIORITY_FILLER        0x0100
#define IPV6_PRIORITY_UNATTENDED    0x0200
#define IPV6_PRIORITY_RESERVED1     0x0300
#define IPV6_PRIORITY_BULK      0x0400
#define IPV6_PRIORITY_RESERVED2     0x0500
#define IPV6_PRIORITY_INTERACTIVE   0x0600
#define IPV6_PRIORITY_CONTROL       0x0700
#define IPV6_PRIORITY_8         0x0800
#define IPV6_PRIORITY_9         0x0900
#define IPV6_PRIORITY_10        0x0a00
#define IPV6_PRIORITY_11        0x0b00
#define IPV6_PRIORITY_12        0x0c00
#define IPV6_PRIORITY_13        0x0d00
#define IPV6_PRIORITY_14        0x0e00
#define IPV6_PRIORITY_15        0x0f00

/*
 *  IPV6 extension headers
 */
#define IPPROTO_HOPOPTS     0   /* IPv6 hop-by-hop options  */
#define IPPROTO_ROUTING     43  /* IPv6 routing header      */
#define IPPROTO_FRAGMENT    44  /* IPv6 fragmentation header    */
#define IPPROTO_ICMPV6      58  /* ICMPv6           */
#define IPPROTO_NONE        59  /* IPv6 no next header      */
#define IPPROTO_DSTOPTS     60  /* IPv6 destination options */
#define IPPROTO_MH      135 /* IPv6 mobility header     */

/*
 *  IPv6 TLV options.
 */
#define IPV6_TLV_PAD1       0
#define IPV6_TLV_PADN       1
#define IPV6_TLV_ROUTERALERT    5
#define IPV6_TLV_JUMBO      194
#define IPV6_TLV_HAO        201 /* home address option */

/*
 *  IPV6 socket options
 */

#define IPV6_ADDRFORM       1
#define IPV6_2292PKTINFO    2
#define IPV6_2292HOPOPTS    3
#define IPV6_2292DSTOPTS    4
#define IPV6_2292RTHDR      5
#define IPV6_2292PKTOPTIONS 6
#define IPV6_CHECKSUM       7
#define IPV6_2292HOPLIMIT   8
#define IPV6_NEXTHOP        9
#define IPV6_AUTHHDR        10  /* obsolete */
#define IPV6_FLOWINFO       11

#define IPV6_UNICAST_HOPS   16
#define IPV6_MULTICAST_IF   17
#define IPV6_MULTICAST_HOPS 18
#define IPV6_MULTICAST_LOOP 19
#define IPV6_ADD_MEMBERSHIP 20
#define IPV6_DROP_MEMBERSHIP    21
#define IPV6_ROUTER_ALERT   22
#define IPV6_MTU_DISCOVER   23
#define IPV6_MTU        24
#define IPV6_RECVERR        25
#define IPV6_V6ONLY     26
#define IPV6_JOIN_ANYCAST   27
#define IPV6_LEAVE_ANYCAST  28

/* IPV6_MTU_DISCOVER values */
#define IPV6_PMTUDISC_DONT      0
#define IPV6_PMTUDISC_WANT      1
#define IPV6_PMTUDISC_DO        2
#define IPV6_PMTUDISC_PROBE     3

/* Flowlabel */
#define IPV6_FLOWLABEL_MGR  32
#define IPV6_FLOWINFO_SEND  33

#define IPV6_IPSEC_POLICY   34
#define IPV6_XFRM_POLICY    35

/*
 * Multicast:
 * Following socket options are shared between IPv4 and IPv6.
 *
 * MCAST_JOIN_GROUP     42
 * MCAST_BLOCK_SOURCE       43
 * MCAST_UNBLOCK_SOURCE     44
 * MCAST_LEAVE_GROUP        45
 * MCAST_JOIN_SOURCE_GROUP  46
 * MCAST_LEAVE_SOURCE_GROUP 47
 * MCAST_MSFILTER       48
 */

/*
 * Advanced API (RFC3542) (1)
 *
 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c.
 */

#define IPV6_RECVPKTINFO    49
#define IPV6_PKTINFO        50
#define IPV6_RECVHOPLIMIT   51
#define IPV6_HOPLIMIT       52
#define IPV6_RECVHOPOPTS    53
#define IPV6_HOPOPTS        54
#define IPV6_RTHDRDSTOPTS   55
#define IPV6_RECVRTHDR      56
#define IPV6_RTHDR      57
#define IPV6_RECVDSTOPTS    58
#define IPV6_DSTOPTS        59
#define IPV6_RECVPATHMTU    60
#define IPV6_PATHMTU        61
#define IPV6_DONTFRAG       62
#if 0   /* not yet */
#define IPV6_USE_MIN_MTU    63
#endif

/*
 * Netfilter (1)
 *
 * Following socket options are used in ip6_tables;
 * see include/linux/netfilter_ipv6/ip6_tables.h.
 *
 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO       64
 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES   65
 */

/*
 * Advanced API (RFC3542) (2)
 */
#define IPV6_RECVTCLASS     66
#define IPV6_TCLASS     67

/*
 * Netfilter (2)
 *
 * Following socket options are used in ip6_tables;
 * see include/linux/netfilter_ipv6/ip6_tables.h.
 *
 * IP6T_SO_GET_REVISION_MATCH   68
 * IP6T_SO_GET_REVISION_TARGET  69
 */

/* RFC5014: Source address selection */
#define IPV6_ADDR_PREFERENCES   72

#define IPV6_PREFER_SRC_TMP     0x0001
#define IPV6_PREFER_SRC_PUBLIC      0x0002
#define IPV6_PREFER_SRC_PUBTMP_DEFAULT  0x0100
#define IPV6_PREFER_SRC_COA     0x0004
#define IPV6_PREFER_SRC_HOME        0x0400
#define IPV6_PREFER_SRC_CGA     0x0008
#define IPV6_PREFER_SRC_NONCGA      0x0800

/* RFC5082: Generalized Ttl Security Mechanism */
#define IPV6_MINHOPCOUNT        73

#define IPV6_ORIGDSTADDR        74
#define IPV6_RECVORIGDSTADDR    IPV6_ORIGDSTADDR
#define IPV6_TRANSPARENT        75
#define IPV6_UNICAST_IF         76

/*
 * Multicast Routing:
 * see include/linux/mroute6.h.
 *
 * MRT6_INIT            200
 * MRT6_DONE            201
 * MRT6_ADD_MIF         202
 * MRT6_DEL_MIF         203
 * MRT6_ADD_MFC         204
 * MRT6_DEL_MFC         205
 * MRT6_VERSION         206
 * MRT6_ASSERT          207
 * MRT6_PIM         208
 * (reserved)           209
 */
#endif /* _UAPI_LINUX_IN6_H */