/* Copyright (C) 1991-2018 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/>.  */

#ifndef	_NETINET_IN_H

#define	_NETINET_IN_H	1

#include <features.h>

#include <bits/stdint-uintn.h>

#include <sys/socket.h>

#include <bits/types.h>

__BEGIN_DECLS

/* Internet address.  */

typedef uint32_t in_addr_t;

struct in_addr

  {

    in_addr_t s_addr;

  };

/* Get system-specific definitions.  */

#include <bits/in.h>

/* Standard well-defined IP protocols.  */

enum

  {

    IPPROTO_IP = 0,	   /* Dummy protocol for TCP.  */

#define IPPROTO_IP		IPPROTO_IP

    IPPROTO_ICMP = 1,	   /* Internet Control Message Protocol.  */

#define IPPROTO_ICMP		IPPROTO_ICMP

    IPPROTO_IGMP = 2,	   /* Internet Group Management Protocol. */

#define IPPROTO_IGMP		IPPROTO_IGMP

    IPPROTO_IPIP = 4,	   /* IPIP tunnels (older KA9Q tunnels use 94).  */

#define IPPROTO_IPIP		IPPROTO_IPIP

    IPPROTO_TCP = 6,	   /* Transmission Control Protocol.  */

#define IPPROTO_TCP		IPPROTO_TCP

    IPPROTO_EGP = 8,	   /* Exterior Gateway Protocol.  */

#define IPPROTO_EGP		IPPROTO_EGP

    IPPROTO_PUP = 12,	   /* PUP protocol.  */

#define IPPROTO_PUP		IPPROTO_PUP

    IPPROTO_UDP = 17,	   /* User Datagram Protocol.  */

#define IPPROTO_UDP		IPPROTO_UDP

    IPPROTO_IDP = 22,	   /* XNS IDP protocol.  */

#define IPPROTO_IDP		IPPROTO_IDP

    IPPROTO_TP = 29,	   /* SO Transport Protocol Class 4.  */

#define IPPROTO_TP		IPPROTO_TP

    IPPROTO_DCCP = 33,	   /* Datagram Congestion Control Protocol.  */

#define IPPROTO_DCCP		IPPROTO_DCCP

    IPPROTO_IPV6 = 41,     /* IPv6 header.  */

#define IPPROTO_IPV6		IPPROTO_IPV6

    IPPROTO_RSVP = 46,	   /* Reservation Protocol.  */

#define IPPROTO_RSVP		IPPROTO_RSVP

    IPPROTO_GRE = 47,	   /* General Routing Encapsulation.  */

#define IPPROTO_GRE		IPPROTO_GRE

    IPPROTO_ESP = 50,      /* encapsulating security payload.  */

#define IPPROTO_ESP		IPPROTO_ESP

    IPPROTO_AH = 51,       /* authentication header.  */

#define IPPROTO_AH		IPPROTO_AH

    IPPROTO_MTP = 92,	   /* Multicast Transport Protocol.  */

#define IPPROTO_MTP		IPPROTO_MTP

    IPPROTO_BEETPH = 94,   /* IP option pseudo header for BEET.  */

#define IPPROTO_BEETPH		IPPROTO_BEETPH

    IPPROTO_ENCAP = 98,	   /* Encapsulation Header.  */

#define IPPROTO_ENCAP		IPPROTO_ENCAP

    IPPROTO_PIM = 103,	   /* Protocol Independent Multicast.  */

#define IPPROTO_PIM		IPPROTO_PIM

    IPPROTO_COMP = 108,	   /* Compression Header Protocol.  */

#define IPPROTO_COMP		IPPROTO_COMP

    IPPROTO_SCTP = 132,	   /* Stream Control Transmission Protocol.  */

#define IPPROTO_SCTP		IPPROTO_SCTP

    IPPROTO_UDPLITE = 136, /* UDP-Lite protocol.  */

#define IPPROTO_UDPLITE		IPPROTO_UDPLITE

    IPPROTO_MPLS = 137,    /* MPLS in IP.  */

#define IPPROTO_MPLS		IPPROTO_MPLS

    IPPROTO_RAW = 255,	   /* Raw IP packets.  */

#define IPPROTO_RAW		IPPROTO_RAW

    IPPROTO_MAX

  };

/* If __USE_KERNEL_IPV6_DEFS is 1 then the user has included the kernel

   network headers first and we should use those ABI-identical definitions

   instead of our own, otherwise 0.  */

#if !__USE_KERNEL_IPV6_DEFS

enum

  {

    IPPROTO_HOPOPTS = 0,   /* IPv6 Hop-by-Hop options.  */

#define IPPROTO_HOPOPTS		IPPROTO_HOPOPTS

    IPPROTO_ROUTING = 43,  /* IPv6 routing header.  */

#define IPPROTO_ROUTING		IPPROTO_ROUTING

    IPPROTO_FRAGMENT = 44, /* IPv6 fragmentation header.  */

#define IPPROTO_FRAGMENT	IPPROTO_FRAGMENT

    IPPROTO_ICMPV6 = 58,   /* ICMPv6.  */

#define IPPROTO_ICMPV6		IPPROTO_ICMPV6

    IPPROTO_NONE = 59,     /* IPv6 no next header.  */

#define IPPROTO_NONE		IPPROTO_NONE

    IPPROTO_DSTOPTS = 60,  /* IPv6 destination options.  */

#define IPPROTO_DSTOPTS		IPPROTO_DSTOPTS

    IPPROTO_MH = 135       /* IPv6 mobility header.  */

#define IPPROTO_MH		IPPROTO_MH

  };

#endif /* !__USE_KERNEL_IPV6_DEFS */

/* Type to represent a port.  */

typedef uint16_t in_port_t;

/* Standard well-known ports.  */

enum

  {

    IPPORT_ECHO = 7,		/* Echo service.  */

    IPPORT_DISCARD = 9,		/* Discard transmissions service.  */

    IPPORT_SYSTAT = 11,		/* System status service.  */

    IPPORT_DAYTIME = 13,	/* Time of day service.  */

    IPPORT_NETSTAT = 15,	/* Network status service.  */

    IPPORT_FTP = 21,		/* File Transfer Protocol.  */

    IPPORT_TELNET = 23,		/* Telnet protocol.  */

    IPPORT_SMTP = 25,		/* Simple Mail Transfer Protocol.  */

    IPPORT_TIMESERVER = 37,	/* Timeserver service.  */

    IPPORT_NAMESERVER = 42,	/* Domain Name Service.  */

    IPPORT_WHOIS = 43,		/* Internet Whois service.  */

    IPPORT_MTP = 57,

    IPPORT_TFTP = 69,		/* Trivial File Transfer Protocol.  */

    IPPORT_RJE = 77,

    IPPORT_FINGER = 79,		/* Finger service.  */

    IPPORT_TTYLINK = 87,

    IPPORT_SUPDUP = 95,		/* SUPDUP protocol.  */

    IPPORT_EXECSERVER = 512,	/* execd service.  */

    IPPORT_LOGINSERVER = 513,	/* rlogind service.  */

    IPPORT_CMDSERVER = 514,

    IPPORT_EFSSERVER = 520,

    /* UDP ports.  */

    IPPORT_BIFFUDP = 512,

    IPPORT_WHOSERVER = 513,

    IPPORT_ROUTESERVER = 520,

    /* Ports less than this value are reserved for privileged processes.  */

    IPPORT_RESERVED = 1024,

    /* Ports greater this value are reserved for (non-privileged) servers.  */

    IPPORT_USERRESERVED = 5000

  };

/* Definitions of the bits in an Internet address integer.

   On subnets, host and network parts are found according to

   the subnet mask, not these masks.  */

#define	IN_CLASSA(a)		((((in_addr_t)(a)) & 0x80000000) == 0)

#define	IN_CLASSA_NET		0xff000000

#define	IN_CLASSA_NSHIFT	24

#define	IN_CLASSA_HOST		(0xffffffff & ~IN_CLASSA_NET)

#define	IN_CLASSA_MAX		128

#define	IN_CLASSB(a)		((((in_addr_t)(a)) & 0xc0000000) == 0x80000000)

#define	IN_CLASSB_NET		0xffff0000

#define	IN_CLASSB_NSHIFT	16

#define	IN_CLASSB_HOST		(0xffffffff & ~IN_CLASSB_NET)

#define	IN_CLASSB_MAX		65536

#define	IN_CLASSC(a)		((((in_addr_t)(a)) & 0xe0000000) == 0xc0000000)

#define	IN_CLASSC_NET		0xffffff00

#define	IN_CLASSC_NSHIFT	8

#define	IN_CLASSC_HOST		(0xffffffff & ~IN_CLASSC_NET)

#define	IN_CLASSD(a)		((((in_addr_t)(a)) & 0xf0000000) == 0xe0000000)

#define	IN_MULTICAST(a)		IN_CLASSD(a)

#define	IN_EXPERIMENTAL(a)	((((in_addr_t)(a)) & 0xe0000000) == 0xe0000000)

#define	IN_BADCLASS(a)		((((in_addr_t)(a)) & 0xf0000000) == 0xf0000000)

/* Address to accept any incoming messages.  */

#define	INADDR_ANY		((in_addr_t) 0x00000000)

/* Address to send to all hosts.  */

#define	INADDR_BROADCAST	((in_addr_t) 0xffffffff)

/* Address indicating an error return.  */

#define	INADDR_NONE		((in_addr_t) 0xffffffff)

/* Network number for local host loopback.  */

#define	IN_LOOPBACKNET		127

/* Address to loopback in software to local host.  */

#ifndef INADDR_LOOPBACK

# define INADDR_LOOPBACK	((in_addr_t) 0x7f000001) /* Inet 127.0.0.1.  */

#endif

/* Defines for Multicast INADDR.  */

#define INADDR_UNSPEC_GROUP	((in_addr_t) 0xe0000000) /* 224.0.0.0 */

#define INADDR_ALLHOSTS_GROUP	((in_addr_t) 0xe0000001) /* 224.0.0.1 */

#define INADDR_ALLRTRS_GROUP    ((in_addr_t) 0xe0000002) /* 224.0.0.2 */

#define INADDR_MAX_LOCAL_GROUP  ((in_addr_t) 0xe00000ff) /* 224.0.0.255 */

#if !__USE_KERNEL_IPV6_DEFS

/* IPv6 address */

struct in6_addr

  {

    union

      {

	uint8_t	__u6_addr8[16];

	uint16_t __u6_addr16[8];

	uint32_t __u6_addr32[4];

      } __in6_u;

#define s6_addr			__in6_u.__u6_addr8

#ifdef __USE_MISC

# define s6_addr16		__in6_u.__u6_addr16

# define s6_addr32		__in6_u.__u6_addr32

#endif

  };

#endif /* !__USE_KERNEL_IPV6_DEFS */

extern const struct in6_addr in6addr_any;        /* :: */

extern const struct in6_addr in6addr_loopback;   /* ::1 */

#define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }

#define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }

#define INET_ADDRSTRLEN 16

#define INET6_ADDRSTRLEN 46

/* Structure describing an Internet socket address.  */

struct sockaddr_in

  {

    __SOCKADDR_COMMON (sin_);

    in_port_t sin_port;			/* Port number.  */

    struct in_addr sin_addr;		/* Internet address.  */

    /* Pad to size of `struct sockaddr'.  */

    unsigned char sin_zero[sizeof (struct sockaddr) -

			   __SOCKADDR_COMMON_SIZE -

			   sizeof (in_port_t) -

			   sizeof (struct in_addr)];

  };

#if !__USE_KERNEL_IPV6_DEFS

/* Ditto, for IPv6.  */

struct sockaddr_in6

  {

    __SOCKADDR_COMMON (sin6_);

    in_port_t sin6_port;	/* Transport layer port # */

    uint32_t sin6_flowinfo;	/* IPv6 flow information */

    struct in6_addr sin6_addr;	/* IPv6 address */

    uint32_t sin6_scope_id;	/* IPv6 scope-id */

  };

#endif /* !__USE_KERNEL_IPV6_DEFS */

#ifdef __USE_MISC

/* IPv4 multicast request.  */

struct ip_mreq

  {

    /* IP multicast address of group.  */

    struct in_addr imr_multiaddr;

    /* Local IP address of interface.  */

    struct in_addr imr_interface;

  };

struct ip_mreq_source

  {

    /* IP multicast address of group.  */

    struct in_addr imr_multiaddr;

    /* IP address of interface.  */

    struct in_addr imr_interface;

    /* IP address of source.  */

    struct in_addr imr_sourceaddr;

  };

#endif

#if !__USE_KERNEL_IPV6_DEFS

/* Likewise, for IPv6.  */

struct ipv6_mreq

  {

    /* IPv6 multicast address of group */

    struct in6_addr ipv6mr_multiaddr;

    /* local interface */

    unsigned int ipv6mr_interface;

  };

#endif /* !__USE_KERNEL_IPV6_DEFS */

#ifdef __USE_MISC

/* Multicast group request.  */

struct group_req

  {

    /* Interface index.  */

    uint32_t gr_interface;

    /* Group address.  */

    struct sockaddr_storage gr_group;

  };

struct group_source_req

  {

    /* Interface index.  */

    uint32_t gsr_interface;

    /* Group address.  */

    struct sockaddr_storage gsr_group;

    /* Source address.  */

    struct sockaddr_storage gsr_source;

  };

/* Full-state filter operations.  */

struct ip_msfilter

  {

    /* IP multicast address of group.  */

    struct in_addr imsf_multiaddr;

    /* Local IP address of interface.  */

    struct in_addr imsf_interface;

    /* Filter mode.  */

    uint32_t imsf_fmode;

    /* Number of source addresses.  */

    uint32_t imsf_numsrc;

    /* Source addresses.  */

    struct in_addr imsf_slist[1];

  };

#define IP_MSFILTER_SIZE(numsrc) (sizeof (struct ip_msfilter) \

				  - sizeof (struct in_addr)		      \

				  + (numsrc) * sizeof (struct in_addr))

struct group_filter

  {

    /* Interface index.  */

    uint32_t gf_interface;

    /* Group address.  */

    struct sockaddr_storage gf_group;

    /* Filter mode.  */

    uint32_t gf_fmode;

    /* Number of source addresses.  */

    uint32_t gf_numsrc;

    /* Source addresses.  */

    struct sockaddr_storage gf_slist[1];

};

#define GROUP_FILTER_SIZE(numsrc) (sizeof (struct group_filter) \

				   - sizeof (struct sockaddr_storage)	      \

				   + ((numsrc)				      \

				      * sizeof (struct sockaddr_storage)))

#endif

/* Functions to convert between host and network byte order.

   Please note that these functions normally take `unsigned long int' or

   `unsigned short int' values as arguments and also return them.  But

   this was a short-sighted decision since on different systems the types

   may have different representations but the values are always the same.  */

extern uint32_t ntohl (uint32_t __netlong) __THROW __attribute__ ((__const__));

extern uint16_t ntohs (uint16_t __netshort)

     __THROW __attribute__ ((__const__));

extern uint32_t htonl (uint32_t __hostlong)

     __THROW __attribute__ ((__const__));

extern uint16_t htons (uint16_t __hostshort)

     __THROW __attribute__ ((__const__));

#include <endian.h>

/* Get machine dependent optimized versions of byte swapping functions.  */

#include <bits/byteswap.h>

#include <bits/uintn-identity.h>

#ifdef __OPTIMIZE__

/* We can optimize calls to the conversion functions.  Either nothing has

   to be done or we are using directly the byte-swapping functions which

   often can be inlined.  */

# if __BYTE_ORDER == __BIG_ENDIAN

/* The host byte order is the same as network byte order,

   so these functions are all just identity.  */

# define ntohl(x)	__uint32_identity (x)

# define ntohs(x)	__uint16_identity (x)

# define htonl(x)	__uint32_identity (x)

# define htons(x)	__uint16_identity (x)

# else

#  if __BYTE_ORDER == __LITTLE_ENDIAN

#   define ntohl(x)	__bswap_32 (x)

#   define ntohs(x)	__bswap_16 (x)

#   define htonl(x)	__bswap_32 (x)

#   define htons(x)	__bswap_16 (x)

#  endif

# endif

#endif

#ifdef __GNUC__

# define IN6_IS_ADDR_UNSPECIFIED(a) \

  (__extension__							      \

   ({ const struct in6_addr *__a = (const struct in6_addr *) (a);	      \

      __a->__in6_u.__u6_addr32[0] == 0					      \

      && __a->__in6_u.__u6_addr32[1] == 0				      \

      && __a->__in6_u.__u6_addr32[2] == 0				      \

      && __a->__in6_u.__u6_addr32[3] == 0; }))

# define IN6_IS_ADDR_LOOPBACK(a) \

  (__extension__							      \

   ({ const struct in6_addr *__a = (const struct in6_addr *) (a);	      \

      __a->__in6_u.__u6_addr32[0] == 0					      \

      && __a->__in6_u.__u6_addr32[1] == 0				      \

      && __a->__in6_u.__u6_addr32[2] == 0				      \

      && __a->__in6_u.__u6_addr32[3] == htonl (1); }))

# define IN6_IS_ADDR_LINKLOCAL(a) \

  (__extension__							      \

   ({ const struct in6_addr *__a = (const struct in6_addr *) (a);	      \

      (__a->__in6_u.__u6_addr32[0] & htonl (0xffc00000)) == htonl (0xfe800000); }))

# define IN6_IS_ADDR_SITELOCAL(a) \

  (__extension__							      \

   ({ const struct in6_addr *__a = (const struct in6_addr *) (a);	      \

      (__a->__in6_u.__u6_addr32[0] & htonl (0xffc00000)) == htonl (0xfec00000); }))

# define IN6_IS_ADDR_V4MAPPED(a) \

  (__extension__							      \

   ({ const struct in6_addr *__a = (const struct in6_addr *) (a);	      \

      __a->__in6_u.__u6_addr32[0] == 0					      \

      && __a->__in6_u.__u6_addr32[1] == 0				      \

      && __a->__in6_u.__u6_addr32[2] == htonl (0xffff); }))

# define IN6_IS_ADDR_V4COMPAT(a) \

  (__extension__							      \

   ({ const struct in6_addr *__a = (const struct in6_addr *) (a);	      \

      __a->__in6_u.__u6_addr32[0] == 0					      \

      && __a->__in6_u.__u6_addr32[1] == 0				      \

      && __a->__in6_u.__u6_addr32[2] == 0				      \

      && ntohl (__a->__in6_u.__u6_addr32[3]) > 1; }))

# define IN6_ARE_ADDR_EQUAL(a,b) \

  (__extension__							      \

   ({ const struct in6_addr *__a = (const struct in6_addr *) (a);	      \

      const struct in6_addr *__b = (const struct in6_addr *) (b);	      \

      __a->__in6_u.__u6_addr32[0] == __b->__in6_u.__u6_addr32[0]	      \

      && __a->__in6_u.__u6_addr32[1] == __b->__in6_u.__u6_addr32[1]	      \

      && __a->__in6_u.__u6_addr32[2] == __b->__in6_u.__u6_addr32[2]	      \

      && __a->__in6_u.__u6_addr32[3] == __b->__in6_u.__u6_addr32[3]; }))

#else

# define IN6_IS_ADDR_UNSPECIFIED(a) \

	(((const uint32_t *) (a))[0] == 0				      \

	 && ((const uint32_t *) (a))[1] == 0				      \

	 && ((const uint32_t *) (a))[2] == 0				      \

	 && ((const uint32_t *) (a))[3] == 0)

# define IN6_IS_ADDR_LOOPBACK(a) \

	(((const uint32_t *) (a))[0] == 0				      \

	 && ((const uint32_t *) (a))[1] == 0				      \

	 && ((const uint32_t *) (a))[2] == 0				      \

	 && ((const uint32_t *) (a))[3] == htonl (1))

# define IN6_IS_ADDR_LINKLOCAL(a) \

	((((const uint32_t *) (a))[0] & htonl (0xffc00000))		      \

	 == htonl (0xfe800000))

# define IN6_IS_ADDR_SITELOCAL(a) \

	((((const uint32_t *) (a))[0] & htonl (0xffc00000))		      \

	 == htonl (0xfec00000))

# define IN6_IS_ADDR_V4MAPPED(a) \

	((((const uint32_t *) (a))[0] == 0)				      \

	 && (((const uint32_t *) (a))[1] == 0)				      \

	 && (((const uint32_t *) (a))[2] == htonl (0xffff)))

# define IN6_IS_ADDR_V4COMPAT(a) \

	((((const uint32_t *) (a))[0] == 0)				      \

	 && (((const uint32_t *) (a))[1] == 0)				      \

	 && (((const uint32_t *) (a))[2] == 0)				      \

	 && (ntohl (((const uint32_t *) (a))[3]) > 1))

# define IN6_ARE_ADDR_EQUAL(a,b) \

	((((const uint32_t *) (a))[0] == ((const uint32_t *) (b))[0])	      \

	 && (((const uint32_t *) (a))[1] == ((const uint32_t *) (b))[1])      \

	 && (((const uint32_t *) (a))[2] == ((const uint32_t *) (b))[2])      \

	 && (((const uint32_t *) (a))[3] == ((const uint32_t *) (b))[3]))

#endif

#define IN6_IS_ADDR_MULTICAST(a) (((const uint8_t *) (a))[0] == 0xff)

#ifdef __USE_MISC

/* Bind socket to a privileged IP port.  */

extern int bindresvport (int __sockfd, struct sockaddr_in *__sock_in) __THROW;

/* The IPv6 version of this function.  */

extern int bindresvport6 (int __sockfd, struct sockaddr_in6 *__sock_in)

     __THROW;

#endif

#define IN6_IS_ADDR_MC_NODELOCAL(a) \

	(IN6_IS_ADDR_MULTICAST(a)					      \

	 && ((((const uint8_t *) (a))[1] & 0xf) == 0x1))

#define IN6_IS_ADDR_MC_LINKLOCAL(a) \

	(IN6_IS_ADDR_MULTICAST(a)					      \

	 && ((((const uint8_t *) (a))[1] & 0xf) == 0x2))

#define IN6_IS_ADDR_MC_SITELOCAL(a) \

	(IN6_IS_ADDR_MULTICAST(a)					      \

	 && ((((const uint8_t *) (a))[1] & 0xf) == 0x5))

#define IN6_IS_ADDR_MC_ORGLOCAL(a) \

	(IN6_IS_ADDR_MULTICAST(a)					      \

	 && ((((const uint8_t *) (a))[1] & 0xf) == 0x8))

#define IN6_IS_ADDR_MC_GLOBAL(a) \

	(IN6_IS_ADDR_MULTICAST(a)					      \

	 && ((((const uint8_t *) (a))[1] & 0xf) == 0xe))

#ifdef __USE_GNU

struct cmsghdr;			/* Forward declaration.  */

#if !__USE_KERNEL_IPV6_DEFS

/* IPv6 packet information.  */

struct in6_pktinfo

  {

    struct in6_addr ipi6_addr;	/* src/dst IPv6 address */

    unsigned int ipi6_ifindex;	/* send/recv interface index */

  };

/* IPv6 MTU information.  */

struct ip6_mtuinfo

  {

    struct sockaddr_in6 ip6m_addr; /* dst address including zone ID */

    uint32_t ip6m_mtu;		   /* path MTU in host byte order */

  };

#endif /* !__USE_KERNEL_IPV6_DEFS */

/* Obsolete hop-by-hop and Destination Options Processing (RFC 2292).  */

extern int inet6_option_space (int __nbytes)

     __THROW __attribute_deprecated__;

extern int inet6_option_init (void *__bp, struct cmsghdr **__cmsgp,

			      int __type) __THROW __attribute_deprecated__;

extern int inet6_option_append (struct cmsghdr *__cmsg,

				const uint8_t *__typep, int __multx,

				int __plusy) __THROW __attribute_deprecated__;

extern uint8_t *inet6_option_alloc (struct cmsghdr *__cmsg, int __datalen,

				    int __multx, int __plusy)

     __THROW __attribute_deprecated__;

extern int inet6_option_next (const struct cmsghdr *__cmsg,

			      uint8_t **__tptrp)

     __THROW __attribute_deprecated__;

extern int inet6_option_find (const struct cmsghdr *__cmsg,

			      uint8_t **__tptrp, int __type)

     __THROW __attribute_deprecated__;

/* Hop-by-Hop and Destination Options Processing (RFC 3542).  */

extern int inet6_opt_init (void *__extbuf, socklen_t __extlen) __THROW;

extern int inet6_opt_append (void *__extbuf, socklen_t __extlen, int __offset,

			     uint8_t __type, socklen_t __len, uint8_t __align,

			     void **__databufp) __THROW;

extern int inet6_opt_finish (void *__extbuf, socklen_t __extlen, int __offset)

     __THROW;

extern int inet6_opt_set_val (void *__databuf, int __offset, void *__val,

			      socklen_t __vallen) __THROW;

extern int inet6_opt_next (void *__extbuf, socklen_t __extlen, int __offset,

			   uint8_t *__typep, socklen_t *__lenp,

			   void **__databufp) __THROW;

extern int inet6_opt_find (void *__extbuf, socklen_t __extlen, int __offset,

			   uint8_t __type, socklen_t *__lenp,

			   void **__databufp) __THROW;

extern int inet6_opt_get_val (void *__databuf, int __offset, void *__val,

			      socklen_t __vallen) __THROW;

/* Routing Header Option (RFC 3542).  */

extern socklen_t inet6_rth_space (int __type, int __segments) __THROW;

extern void *inet6_rth_init (void *__bp, socklen_t __bp_len, int __type,

			     int __segments) __THROW;

extern int inet6_rth_add (void *__bp, const struct in6_addr *__addr) __THROW;

extern int inet6_rth_reverse (const void *__in, void *__out) __THROW;

extern int inet6_rth_segments (const void *__bp) __THROW;

extern struct in6_addr *inet6_rth_getaddr (const void *__bp, int __index)

     __THROW;

/* Multicast source filter support.  */

/* Get IPv4 source filter.  */

extern int getipv4sourcefilter (int __s, struct in_addr __interface_addr,

				struct in_addr __group, uint32_t *__fmode,

				uint32_t *__numsrc, struct in_addr *__slist)

     __THROW;

/* Set IPv4 source filter.  */

extern int setipv4sourcefilter (int __s, struct in_addr __interface_addr,

				struct in_addr __group, uint32_t __fmode,

				uint32_t __numsrc,

				const struct in_addr *__slist)

     __THROW;

/* Get source filter.  */

extern int getsourcefilter (int __s, uint32_t __interface_addr,

			    const struct sockaddr *__group,

			    socklen_t __grouplen, uint32_t *__fmode,

			    uint32_t *__numsrc,

			    struct sockaddr_storage *__slist) __THROW;

/* Set source filter.  */

extern int setsourcefilter (int __s, uint32_t __interface_addr,

			    const struct sockaddr *__group,

			    socklen_t __grouplen, uint32_t __fmode,

			    uint32_t __numsrc,

			    const struct sockaddr_storage *__slist) __THROW;

#endif	/* use GNU */

__END_DECLS

#endif	/* netinet/in.h */