include/linux/in.h - pub/scm/linux/kernel/git/ebiederm/sysctl - Git at Google

 /*
  * INET		An implementation of the TCP/IP protocol suite for the LINUX
  *		operating system.  INET is implemented using the  BSD Socket
  *		interface as the means of communication with the user level.
  *
  *		Definitions of the Internet Protocol.
  *
  * Version:	@(#)in.h	1.0.1	04/21/93
  *
  * Authors:	Original taken from the GNU Project <netinet/in.h> file.
  *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  *
  *		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_IN_H
 #define _LINUX_IN_H

 #include <linux/types.h>
 #include <linux/socket.h>

 /* Standard well-defined IP protocols.  */
 enum {
   IPPROTO_IP = 0,		/* Dummy protocol for TCP		*/
   IPPROTO_ICMP = 1,		/* Internet Control Message Protocol	*/
   IPPROTO_IGMP = 2,		/* Internet Group Management Protocol	*/
   IPPROTO_IPIP = 4,		/* IPIP tunnels (older KA9Q tunnels use 94) */
   IPPROTO_TCP = 6,		/* Transmission Control Protocol	*/
   IPPROTO_EGP = 8,		/* Exterior Gateway Protocol		*/
   IPPROTO_PUP = 12,		/* PUP protocol				*/
   IPPROTO_UDP = 17,		/* User Datagram Protocol		*/
   IPPROTO_IDP = 22,		/* XNS IDP protocol			*/
   IPPROTO_DCCP = 33,		/* Datagram Congestion Control Protocol */
   IPPROTO_RSVP = 46,		/* RSVP protocol			*/
   IPPROTO_GRE = 47,		/* Cisco GRE tunnels (rfc 1701,1702)	*/

   IPPROTO_IPV6	 = 41,		/* IPv6-in-IPv4 tunnelling		*/

   IPPROTO_ESP = 50,            /* Encapsulation Security Payload protocol */
   IPPROTO_AH = 51,             /* Authentication Header protocol       */
   IPPROTO_BEETPH = 94,	       /* IP option pseudo header for BEET */
   IPPROTO_PIM    = 103,		/* Protocol Independent Multicast	*/

   IPPROTO_COMP   = 108,                /* Compression Header protocol */
   IPPROTO_SCTP   = 132,		/* Stream Control Transport Protocol	*/
   IPPROTO_UDPLITE = 136,	/* UDP-Lite (RFC 3828)			*/

   IPPROTO_RAW	 = 255,		/* Raw IP packets			*/
   IPPROTO_MAX
 };


 /* Internet address. */
 struct in_addr {
 	__be32	s_addr;
 };

 #define IP_TOS		1
 #define IP_TTL		2
 #define IP_HDRINCL	3
 #define IP_OPTIONS	4
 #define IP_ROUTER_ALERT	5
 #define IP_RECVOPTS	6
 #define IP_RETOPTS	7
 #define IP_PKTINFO	8
 #define IP_PKTOPTIONS	9
 #define IP_MTU_DISCOVER	10
 #define IP_RECVERR	11
 #define IP_RECVTTL	12
 #define	IP_RECVTOS	13
 #define IP_MTU		14
 #define IP_FREEBIND	15
 #define IP_IPSEC_POLICY	16
 #define IP_XFRM_POLICY	17
 #define IP_PASSSEC	18
 #define IP_TRANSPARENT	19

 /* BSD compatibility */
 #define IP_RECVRETOPTS	IP_RETOPTS

 /* TProxy original addresses */
 #define IP_ORIGDSTADDR       20
 #define IP_RECVORIGDSTADDR   IP_ORIGDSTADDR

 #define IP_MINTTL       21
 #define IP_NODEFRAG     22

 /* IP_MTU_DISCOVER values */
 #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		*/
 #define IP_PMTUDISC_PROBE		3       /* Ignore dst pmtu      */

 #define IP_MULTICAST_IF			32
 #define IP_MULTICAST_TTL 		33
 #define IP_MULTICAST_LOOP 		34
 #define IP_ADD_MEMBERSHIP		35
 #define IP_DROP_MEMBERSHIP		36
 #define IP_UNBLOCK_SOURCE		37
 #define IP_BLOCK_SOURCE			38
 #define IP_ADD_SOURCE_MEMBERSHIP	39
 #define IP_DROP_SOURCE_MEMBERSHIP	40
 #define IP_MSFILTER			41
 #define MCAST_JOIN_GROUP		42
 #define MCAST_BLOCK_SOURCE		43
 #define MCAST_UNBLOCK_SOURCE		44
 #define MCAST_LEAVE_GROUP		45
 #define MCAST_JOIN_SOURCE_GROUP		46
 #define MCAST_LEAVE_SOURCE_GROUP	47
 #define MCAST_MSFILTER			48
 #define IP_MULTICAST_ALL		49

 #define MCAST_EXCLUDE	0
 #define MCAST_INCLUDE	1

 /* These need to appear somewhere around here */
 #define IP_DEFAULT_MULTICAST_TTL        1
 #define IP_DEFAULT_MULTICAST_LOOP       1

 /* Request struct for multicast socket ops */

 struct ip_mreq  {
 	struct in_addr imr_multiaddr;	/* IP multicast address of group */
 	struct in_addr imr_interface;	/* local IP address of interface */
 };

 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 */
 };

 struct ip_mreq_source {
 	__be32		imr_multiaddr;
 	__be32		imr_interface;
 	__be32		imr_sourceaddr;
 };

 struct ip_msfilter {
 	__be32		imsf_multiaddr;
 	__be32		imsf_interface;
 	__u32		imsf_fmode;
 	__u32		imsf_numsrc;
 	__be32		imsf_slist[1];
 };

 #define IP_MSFILTER_SIZE(numsrc) \
 	(sizeof(struct ip_msfilter) - sizeof(__u32) \
 	+ (numsrc) * sizeof(__u32))

 struct group_req {
 	__u32				 gr_interface;	/* interface index */
 	struct __kernel_sockaddr_storage gr_group;	/* group address */
 };

 struct group_source_req {
 	__u32				 gsr_interface;	/* interface index */
 	struct __kernel_sockaddr_storage gsr_group;	/* group address */
 	struct __kernel_sockaddr_storage gsr_source;	/* source address */
 };

 struct group_filter {
 	__u32				 gf_interface;	/* interface index */
 	struct __kernel_sockaddr_storage gf_group;	/* multicast address */
 	__u32				 gf_fmode;	/* filter mode */
 	__u32				 gf_numsrc;	/* number of sources */
 	struct __kernel_sockaddr_storage gf_slist[1];	/* interface index */
 };

 #define GROUP_FILTER_SIZE(numsrc) \
 	(sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
 	+ (numsrc) * sizeof(struct __kernel_sockaddr_storage))

 struct in_pktinfo {
 	int		ipi_ifindex;
 	struct in_addr	ipi_spec_dst;
 	struct in_addr	ipi_addr;
 };

 /* Structure describing an Internet (IP) socket address. */
 #define __SOCK_SIZE__	16		/* sizeof(struct sockaddr)	*/
 struct sockaddr_in {
   __kernel_sa_family_t	sin_family;	/* Address family		*/
   __be16		sin_port;	/* Port number			*/
   struct in_addr	sin_addr;	/* Internet address		*/

   /* Pad to size of `struct sockaddr'. */
   unsigned char		__pad[__SOCK_SIZE__ - sizeof(short int) -
 			sizeof(unsigned short int) - sizeof(struct in_addr)];
 };
 #define sin_zero	__pad		/* for BSD UNIX comp. -FvK	*/


 /*
  * 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)		((((long int) (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)		((((long int) (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)		((((long int) (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)		((((long int) (a)) & 0xf0000000) == 0xe0000000)
 #define	IN_MULTICAST(a)		IN_CLASSD(a)
 #define IN_MULTICAST_NET	0xF0000000

 #define	IN_EXPERIMENTAL(a)	((((long int) (a)) & 0xf0000000) == 0xf0000000)
 #define	IN_BADCLASS(a)		IN_EXPERIMENTAL((a))

 /* Address to accept any incoming messages. */
 #define	INADDR_ANY		((unsigned long int) 0x00000000)

 /* Address to send to all hosts. */
 #define	INADDR_BROADCAST	((unsigned long int) 0xffffffff)

 /* Address indicating an error return. */
 #define	INADDR_NONE		((unsigned long int) 0xffffffff)

 /* Network number for local host loopback. */
 #define	IN_LOOPBACKNET		127

 /* Address to loopback in software to local host.  */
 #define	INADDR_LOOPBACK		0x7f000001	/* 127.0.0.1   */
 #define	IN_LOOPBACK(a)		((((long int) (a)) & 0xff000000) == 0x7f000000)

 /* Defines for Multicast INADDR */
 #define INADDR_UNSPEC_GROUP   	0xe0000000U	/* 224.0.0.0   */
 #define INADDR_ALLHOSTS_GROUP 	0xe0000001U	/* 224.0.0.1   */
 #define INADDR_ALLRTRS_GROUP    0xe0000002U	/* 224.0.0.2 */
 #define INADDR_MAX_LOCAL_GROUP  0xe00000ffU	/* 224.0.0.255 */


 /* <asm/byteorder.h> contains the htonl type stuff.. */
 #include <asm/byteorder.h>

 #ifdef __KERNEL__

 #include <linux/errno.h>

 static inline int proto_ports_offset(int proto)
 {
 	switch (proto) {
 	case IPPROTO_TCP:
 	case IPPROTO_UDP:
 	case IPPROTO_DCCP:
 	case IPPROTO_ESP:	/* SPI */
 	case IPPROTO_SCTP:
 	case IPPROTO_UDPLITE:
 		return 0;
 	case IPPROTO_AH:	/* SPI */
 		return 4;
 	default:
 		return -EINVAL;
 	}
 }

 static inline bool ipv4_is_loopback(__be32 addr)
 {
 	return (addr & htonl(0xff000000)) == htonl(0x7f000000);
 }

 static inline bool ipv4_is_multicast(__be32 addr)
 {
 	return (addr & htonl(0xf0000000)) == htonl(0xe0000000);
 }

 static inline bool ipv4_is_local_multicast(__be32 addr)
 {
 	return (addr & htonl(0xffffff00)) == htonl(0xe0000000);
 }

 static inline bool ipv4_is_lbcast(__be32 addr)
 {
 	/* limited broadcast */
 	return addr == htonl(INADDR_BROADCAST);
 }

 static inline bool ipv4_is_zeronet(__be32 addr)
 {
 	return (addr & htonl(0xff000000)) == htonl(0x00000000);
 }

 /* Special-Use IPv4 Addresses (RFC3330) */

 static inline bool ipv4_is_private_10(__be32 addr)
 {
 	return (addr & htonl(0xff000000)) == htonl(0x0a000000);
 }

 static inline bool ipv4_is_private_172(__be32 addr)
 {
 	return (addr & htonl(0xfff00000)) == htonl(0xac100000);
 }

 static inline bool ipv4_is_private_192(__be32 addr)
 {
 	return (addr & htonl(0xffff0000)) == htonl(0xc0a80000);
 }

 static inline bool ipv4_is_linklocal_169(__be32 addr)
 {
 	return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000);
 }

 static inline bool ipv4_is_anycast_6to4(__be32 addr)
 {
 	return (addr & htonl(0xffffff00)) == htonl(0xc0586300);
 }

 static inline bool ipv4_is_test_192(__be32 addr)
 {
 	return (addr & htonl(0xffffff00)) == htonl(0xc0000200);
 }

 static inline bool ipv4_is_test_198(__be32 addr)
 {
 	return (addr & htonl(0xfffe0000)) == htonl(0xc6120000);
 }
 #endif

 #endif	/* _LINUX_IN_H */
	/*
	* INET An implementation of the TCP/IP protocol suite for the LINUX
	* operating system. INET is implemented using the BSD Socket
	* interface as the means of communication with the user level.
	*
	* Definitions of the Internet Protocol.
	*
	* Version: @(#)in.h 1.0.1 04/21/93
	*
	* Authors: Original taken from the GNU Project <netinet/in.h> file.
	* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
	*
	* 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_IN_H
	#define _LINUX_IN_H

	#include <linux/types.h>
	#include <linux/socket.h>

	/* Standard well-defined IP protocols. */
	enum {
	IPPROTO_IP = 0, /* Dummy protocol for TCP */
	IPPROTO_ICMP = 1, /* Internet Control Message Protocol */
	IPPROTO_IGMP = 2, /* Internet Group Management Protocol */
	IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */
	IPPROTO_TCP = 6, /* Transmission Control Protocol */
	IPPROTO_EGP = 8, /* Exterior Gateway Protocol */
	IPPROTO_PUP = 12, /* PUP protocol */
	IPPROTO_UDP = 17, /* User Datagram Protocol */
	IPPROTO_IDP = 22, /* XNS IDP protocol */
	IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol */
	IPPROTO_RSVP = 46, /* RSVP protocol */
	IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */

	IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */

	IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */
	IPPROTO_AH = 51, /* Authentication Header protocol */
	IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET */
	IPPROTO_PIM = 103, /* Protocol Independent Multicast */

	IPPROTO_COMP = 108, /* Compression Header protocol */
	IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */
	IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828) */

	IPPROTO_RAW = 255, /* Raw IP packets */
	IPPROTO_MAX
	};


	/* Internet address. */
	struct in_addr {
	__be32 s_addr;
	};

	#define IP_TOS 1
	#define IP_TTL 2
	#define IP_HDRINCL 3
	#define IP_OPTIONS 4
	#define IP_ROUTER_ALERT 5
	#define IP_RECVOPTS 6
	#define IP_RETOPTS 7
	#define IP_PKTINFO 8
	#define IP_PKTOPTIONS 9
	#define IP_MTU_DISCOVER 10
	#define IP_RECVERR 11
	#define IP_RECVTTL 12
	#define IP_RECVTOS 13
	#define IP_MTU 14
	#define IP_FREEBIND 15
	#define IP_IPSEC_POLICY 16
	#define IP_XFRM_POLICY 17
	#define IP_PASSSEC 18
	#define IP_TRANSPARENT 19

	/* BSD compatibility */
	#define IP_RECVRETOPTS IP_RETOPTS

	/* TProxy original addresses */
	#define IP_ORIGDSTADDR 20
	#define IP_RECVORIGDSTADDR IP_ORIGDSTADDR

	#define IP_MINTTL 21
	#define IP_NODEFRAG 22

	/* IP_MTU_DISCOVER values */
	#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 */
	#define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */

	#define IP_MULTICAST_IF 32
	#define IP_MULTICAST_TTL 33
	#define IP_MULTICAST_LOOP 34
	#define IP_ADD_MEMBERSHIP 35
	#define IP_DROP_MEMBERSHIP 36
	#define IP_UNBLOCK_SOURCE 37
	#define IP_BLOCK_SOURCE 38
	#define IP_ADD_SOURCE_MEMBERSHIP 39
	#define IP_DROP_SOURCE_MEMBERSHIP 40
	#define IP_MSFILTER 41
	#define MCAST_JOIN_GROUP 42
	#define MCAST_BLOCK_SOURCE 43
	#define MCAST_UNBLOCK_SOURCE 44
	#define MCAST_LEAVE_GROUP 45
	#define MCAST_JOIN_SOURCE_GROUP 46
	#define MCAST_LEAVE_SOURCE_GROUP 47
	#define MCAST_MSFILTER 48
	#define IP_MULTICAST_ALL 49

	#define MCAST_EXCLUDE 0
	#define MCAST_INCLUDE 1

	/* These need to appear somewhere around here */
	#define IP_DEFAULT_MULTICAST_TTL 1
	#define IP_DEFAULT_MULTICAST_LOOP 1

	/* Request struct for multicast socket ops */

	struct ip_mreq {
	struct in_addr imr_multiaddr; /* IP multicast address of group */
	struct in_addr imr_interface; /* local IP address of interface */
	};

	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 */
	};

	struct ip_mreq_source {
	__be32 imr_multiaddr;
	__be32 imr_interface;
	__be32 imr_sourceaddr;
	};

	struct ip_msfilter {
	__be32 imsf_multiaddr;
	__be32 imsf_interface;
	__u32 imsf_fmode;
	__u32 imsf_numsrc;
	__be32 imsf_slist[1];
	};

	#define IP_MSFILTER_SIZE(numsrc) \
	(sizeof(struct ip_msfilter) - sizeof(__u32) \
	+ (numsrc) * sizeof(__u32))

	struct group_req {
	__u32 gr_interface; /* interface index */
	struct __kernel_sockaddr_storage gr_group; /* group address */
	};

	struct group_source_req {
	__u32 gsr_interface; /* interface index */
	struct __kernel_sockaddr_storage gsr_group; /* group address */
	struct __kernel_sockaddr_storage gsr_source; /* source address */
	};

	struct group_filter {
	__u32 gf_interface; /* interface index */
	struct __kernel_sockaddr_storage gf_group; /* multicast address */
	__u32 gf_fmode; /* filter mode */
	__u32 gf_numsrc; /* number of sources */
	struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */
	};

	#define GROUP_FILTER_SIZE(numsrc) \
	(sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
	+ (numsrc) * sizeof(struct __kernel_sockaddr_storage))

	struct in_pktinfo {
	int ipi_ifindex;
	struct in_addr ipi_spec_dst;
	struct in_addr ipi_addr;
	};

	/* Structure describing an Internet (IP) socket address. */
	#define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
	struct sockaddr_in {
	__kernel_sa_family_t sin_family; /* Address family */
	__be16 sin_port; /* Port number */
	struct in_addr sin_addr; /* Internet address */

	/* Pad to size of `struct sockaddr'. */
	unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
	sizeof(unsigned short int) - sizeof(struct in_addr)];
	};
	#define sin_zero __pad /* for BSD UNIX comp. -FvK */


	/*
	* 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) ((((long int) (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) ((((long int) (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) ((((long int) (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) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
	#define IN_MULTICAST(a) IN_CLASSD(a)
	#define IN_MULTICAST_NET 0xF0000000

	#define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
	#define IN_BADCLASS(a) IN_EXPERIMENTAL((a))

	/* Address to accept any incoming messages. */
	#define INADDR_ANY ((unsigned long int) 0x00000000)

	/* Address to send to all hosts. */
	#define INADDR_BROADCAST ((unsigned long int) 0xffffffff)

	/* Address indicating an error return. */
	#define INADDR_NONE ((unsigned long int) 0xffffffff)

	/* Network number for local host loopback. */
	#define IN_LOOPBACKNET 127

	/* Address to loopback in software to local host. */
	#define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
	#define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)

	/* Defines for Multicast INADDR */
	#define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
	#define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
	#define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
	#define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */


	/* <asm/byteorder.h> contains the htonl type stuff.. */
	#include <asm/byteorder.h>

	#ifdef __KERNEL__

	#include <linux/errno.h>

	static inline int proto_ports_offset(int proto)
	{
	switch (proto) {
	case IPPROTO_TCP:
	case IPPROTO_UDP:
	case IPPROTO_DCCP:
	case IPPROTO_ESP: /* SPI */
	case IPPROTO_SCTP:
	case IPPROTO_UDPLITE:
	return 0;
	case IPPROTO_AH: /* SPI */
	return 4;
	default:
	return -EINVAL;
	}
	}

	static inline bool ipv4_is_loopback(__be32 addr)
	{
	return (addr & htonl(0xff000000)) == htonl(0x7f000000);
	}

	static inline bool ipv4_is_multicast(__be32 addr)
	{
	return (addr & htonl(0xf0000000)) == htonl(0xe0000000);
	}

	static inline bool ipv4_is_local_multicast(__be32 addr)
	{
	return (addr & htonl(0xffffff00)) == htonl(0xe0000000);
	}

	static inline bool ipv4_is_lbcast(__be32 addr)
	{
	/* limited broadcast */
	return addr == htonl(INADDR_BROADCAST);
	}

	static inline bool ipv4_is_zeronet(__be32 addr)
	{
	return (addr & htonl(0xff000000)) == htonl(0x00000000);
	}

	/* Special-Use IPv4 Addresses (RFC3330) */

	static inline bool ipv4_is_private_10(__be32 addr)
	{
	return (addr & htonl(0xff000000)) == htonl(0x0a000000);
	}

	static inline bool ipv4_is_private_172(__be32 addr)
	{
	return (addr & htonl(0xfff00000)) == htonl(0xac100000);
	}

	static inline bool ipv4_is_private_192(__be32 addr)
	{
	return (addr & htonl(0xffff0000)) == htonl(0xc0a80000);
	}

	static inline bool ipv4_is_linklocal_169(__be32 addr)
	{
	return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000);
	}

	static inline bool ipv4_is_anycast_6to4(__be32 addr)
	{
	return (addr & htonl(0xffffff00)) == htonl(0xc0586300);
	}

	static inline bool ipv4_is_test_192(__be32 addr)
	{
	return (addr & htonl(0xffffff00)) == htonl(0xc0000200);
	}

	static inline bool ipv4_is_test_198(__be32 addr)
	{
	return (addr & htonl(0xfffe0000)) == htonl(0xc6120000);
	}
	#endif

	#endif /* _LINUX_IN_H */