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/* Copyright (C) 1991-1999, 2000, 2004 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, write to the Free

   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

   02111-1307 USA.  */

/* Linux version.  */

#ifndef _NETINET_IN_H

# error "Never use <bits/in.h> directly; include <netinet/in.h> instead."

#endif

/* Options for use with `getsockopt' and `setsockopt' at the IP level.

   The first word in the comment at the right is the data type used;

   "bool" means a boolean value stored in an `int'.  */

#define        IP_OPTIONS      4       /* ip_opts; IP per-packet options.  */

#define        IP_HDRINCL      3       /* int; Header is included with data.  */

#define        IP_TOS          1       /* int; IP type of service and precedence.  */

#define        IP_TTL          2       /* int; IP time to live.  */

#define        IP_RECVOPTS     6       /* bool; Receive all IP options w/datagram.  */

/* For BSD compatibility.  */

#define        IP_RECVRETOPTS  IP_RETOPTS       /* bool; Receive IP options for response.  */

#define        IP_RETOPTS      7       /* ip_opts; Set/get IP per-packet options.  */

#define IP_MULTICAST_IF 32      /* in_addr; set/get IP multicast i/f */

#define IP_MULTICAST_TTL 33     /* u_char; set/get IP multicast ttl */

#define IP_MULTICAST_LOOP 34    /* i_char; set/get IP multicast loopback */

#define IP_ADD_MEMBERSHIP 35    /* ip_mreq; add an IP group membership */

#define IP_DROP_MEMBERSHIP 36   /* ip_mreq; drop an IP group membership */

#define IP_UNBLOCK_SOURCE 37    /* ip_mreq_source: unblock data from source */

#define IP_BLOCK_SOURCE 38      /* ip_mreq_source: block data from source */

#define IP_ADD_SOURCE_MEMBERSHIP 39 /* ip_mreq_source: join source group */

#define IP_DROP_SOURCE_MEMBERSHIP 40 /* ip_mreq_source: leave source group */

#define IP_MSFILTER 41

#define MCAST_JOIN_GROUP 42     /* group_req: join any-source group */

#define MCAST_BLOCK_SOURCE 43   /* group_source_req: block from given group */

#define MCAST_UNBLOCK_SOURCE 44 /* group_source_req: unblock from given group*/

#define MCAST_LEAVE_GROUP 45    /* group_req: leave any-source group */

#define MCAST_JOIN_SOURCE_GROUP 46 /* group_source_req: join source-spec gr */

#define MCAST_LEAVE_SOURCE_GROUP 47 /* group_source_req: leave source-spec gr*/

#define MCAST_MSFILTER 48

#define MCAST_EXCLUDE   0

#define MCAST_INCLUDE   1

#define IP_ROUTER_ALERT    5    /* bool */

#define IP_PKTINFO         8    /* bool */

#define IP_PKTOPTIONS      9

#define IP_PMTUDISC        10   /* obsolete name? */

#define IP_MTU_DISCOVER    10   /* int; see below */

#define IP_RECVERR         11   /* bool */

#define IP_RECVTTL         12   /* bool */

#define IP_RECVTOS         13   /* bool */

/* IP_MTU_DISCOVER arguments.  */

#define IP_PMTUDISC_DONT   0    /* Never send DF frames.  */

#define IP_PMTUDISC_WANT   1    /* Use per route hints.  */

#define IP_PMTUDISC_DO     2    /* Always DF.  */

/* To select the IP level.  */

#define SOL_IP  0

#define IP_DEFAULT_MULTICAST_TTL        1

#define IP_DEFAULT_MULTICAST_LOOP       1

#define IP_MAX_MEMBERSHIPS              20

/* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS.

   The `ip_dst' field is used for the first-hop gateway when using a

   source route (this gets put into the header proper).  */

struct ip_opts

  {

    struct in_addr ip_dst;      /* First hop; zero without source route.  */

    char ip_opts[40];           /* Actually variable in size.  */

  };

/* Like `struct ip_mreq' but including interface specification by index.  */

struct ip_mreqn

  {

    struct in_addr imr_multiaddr;       /* IP multicast address of group */

    struct in_addr imr_address;         /* local IP address of interface */

    int imr_ifindex;                    /* Interface index */

  };

/* Structure used for IP_PKTINFO.  */

struct in_pktinfo

  {

    int ipi_ifindex;                    /* Interface index  */

    struct in_addr ipi_spec_dst;        /* Routing destination address  */

    struct in_addr ipi_addr;            /* Header destination address  */

  };

/* Options for use with `getsockopt' and `setsockopt' at the IPv6 level.

   The first word in the comment at the right is the data type used;

   "bool" means a boolean value stored in an `int'.  */

#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 SCM_SRCRT               IPV6_RXSRCRT

#define IPV6_NEXTHOP            9

#define IPV6_AUTHHDR            10

#define IPV6_UNICAST_HOPS       16

#define IPV6_MULTICAST_IF       17

#define IPV6_MULTICAST_HOPS     18

#define IPV6_MULTICAST_LOOP     19

#define IPV6_JOIN_GROUP         20

#define IPV6_LEAVE_GROUP        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

#define IPV6_IPSEC_POLICY       34

#define IPV6_XFRM_POLICY        35

#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_RECVTCLASS         66

#define IPV6_TCLASS             67

/* Obsolete synonyms for the above.  */

#define IPV6_ADD_MEMBERSHIP     IPV6_JOIN_GROUP

#define IPV6_DROP_MEMBERSHIP    IPV6_LEAVE_GROUP

#define IPV6_RXHOPOPTS          IPV6_HOPOPTS

#define IPV6_RXDSTOPTS          IPV6_DSTOPTS

/* IPV6_MTU_DISCOVER values.  */

#define IPV6_PMTUDISC_DONT      0        /* Never send DF frames.  */

#define IPV6_PMTUDISC_WANT      1       /* Use per route hints.  */

#define IPV6_PMTUDISC_DO        2       /* Always DF.  */

/* Socket level values for IPv6.  */

#define SOL_IPV6        41

#define SOL_ICMPV6      58

/* Routing header options for IPv6.  */

#define IPV6_RTHDR_LOOSE        0        /* Hop doesn't need to be neighbour. */

#define IPV6_RTHDR_STRICT       1       /* Hop must be a neighbour.  */

#define IPV6_RTHDR_TYPE_0       0        /* IPv6 Routing header type 0.  */