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/*

 *      Types and definitions for AF_INET6

 *      Linux INET6 implementation

 *

 *      Authors:

 *      Pedro Roque             <roque@di.fc.ul.pt>

 *

 *      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 _LINUX_IN6_H

#define _LINUX_IN6_H

#include <linux/types.h>

#include <linux/libc-compat.h>

/*

 *      IPv6 address structure

 */

#if __UAPI_DEF_IN6_ADDR

struct in6_addr {

        union {

                __u8            u6_addr8[16];

#if __UAPI_DEF_IN6_ADDR_ALT

                __be16          u6_addr16[8];

                __be32          u6_addr32[4];

#endif

        } in6_u;

#define s6_addr                 in6_u.u6_addr8

#if __UAPI_DEF_IN6_ADDR_ALT

#define s6_addr16               in6_u.u6_addr16

#define s6_addr32               in6_u.u6_addr32

#endif

};

#endif /* __UAPI_DEF_IN6_ADDR */

#if __UAPI_DEF_SOCKADDR_IN6

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) */

};

#endif /* __UAPI_DEF_SOCKADDR_IN6 */

#if __UAPI_DEF_IPV6_MREQ

struct ipv6_mreq {

        /* IPv6 multicast address of group */

        struct in6_addr ipv6mr_multiaddr;

        /* local IPv6 address of interface */

        int             ipv6mr_ifindex;

};

#endif /* __UAPI_DEF_IVP6_MREQ */

#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_F_REFLECT       4

#define IPV6_FL_F_REMOTE        8

#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

 */

#if __UAPI_DEF_IPPROTO_V6

#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         */

#endif /* __UAPI_DEF_IPPROTO_V6 */

/*

 *      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

 */

#if __UAPI_DEF_IPV6_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

/* same as IPV6_PMTUDISC_PROBE, provided for symetry with IPv4

 * also see comments on IP_PMTUDISC_INTERFACE

 */

#define IPV6_PMTUDISC_INTERFACE         4

/* Flowlabel */

#define IPV6_FLOWLABEL_MGR      32

#define IPV6_FLOWINFO_SEND      33

#define IPV6_IPSEC_POLICY       34

#define IPV6_XFRM_POLICY        35

#endif

/*

 * 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

 * IP6T_SO_ORIGINAL_DST         80

 */

/* 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/uapi/linux/mroute6.h.

 *

 * MRT6_BASE                    200

 * ...

 * MRT6_MAX

 */

#endif /* _LINUX_IN6_H */