/* Copyright (C) 1997-2018 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, see

   <http://www.gnu.org/licenses/>.  */

/* Generic version.  */

#ifndef _NETINET_IN_H

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

#endif

/* This is the generic version, do not assume a linux-based kernel.  */

#define __USE_KERNEL_IPV6_DEFS 0

/* To select the IP level.  */

#define SOL_IP		0

/* 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	1	/* ip_opts; IP per-packet options.  */

#define	IP_HDRINCL	2	/* int; Header is included with data.  */

#define	IP_TOS		3	/* int; IP type of service and precedence.  */

#define	IP_TTL		4	/* int; IP time to live.  */

#define	IP_RECVOPTS	5	/* bool; Receive all IP options w/datagram.  */

#define	IP_RECVRETOPTS	6	/* bool; Receive IP options for response.  */

#define	IP_RECVDSTADDR	7	/* bool; Receive IP dst addr w/datagram.  */

#define	IP_RETOPTS	8	/* ip_opts; Set/get IP per-packet options.  */

#define IP_MULTICAST_IF 9	/* in_addr; set/get IP multicast i/f */

#define IP_MULTICAST_TTL 10	/* unsigned char; set/get IP multicast ttl */

#define IP_MULTICAST_LOOP 11	/* bool; set/get IP multicast loopback */

#define IP_ADD_MEMBERSHIP 12	/* ip_mreq; add an IP group membership */

#define IP_DROP_MEMBERSHIP 13	/* ip_mreq; drop an IP group membership */

#ifdef __USE_MISC

/* 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.  */

  };

#endif

/* Socket-level values for IPv6.  */

#define SOL_IPV6		41

#define SOL_ICMPV6		58

/* 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_RXINFO		IPV6_2292PKTINFO

#define IPV6_TXINFO		IPV6_RXINFO

#define SCM_SRCINFO		IPV6_TXINFO

#define SCM_SRCRT		IPV6_RXSRCRT

#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

/* Advanced API (RFC3542) (1).  */

#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

/* Obsolete synonyms for the above.  */

#define IPV6_ADD_MEMBERSHIP	IPV6_JOIN_GROUP

#define IPV6_DROP_MEMBERSHIP	IPV6_LEAVE_GROUP

#define IPV6_RXHOPOPTS		IPV6_2292HOPOPTS

#define IPV6_RXDSTOPTS		IPV6_2292DSTOPTS

/* 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.  */