in.h File Reference

Definitions for the Internet address family. More...

#include <sys/cdefs.h>
#include <inttypes.h>
#include <sys/socket.h>
#include <arpa/inet.h>

Go to the source code of this file.

Data Structures
struct	in_addr
	Structure used to store an IPv4 address. More...
struct	in6_addr
	Structure used to store an IPv6 address. More...
struct	sockaddr_in
	Structure used to store an IPv4 address for a socket. More...
struct	sockaddr_in6
	Structure used to store an IPv6 address for a socket. More...

Macros
#define	s6_addr   __s6_addr.__s6_addr8
#define	INADDR_ANY   0x00000000
	Local IPv4 host address.
#define	INADDR_BROADCAST   0xFFFFFFFF
	IPv4 broadcast address.
#define	INADDR_NONE   0xFFFFFFFF
	IPv4 error address.
#define	IN6ADDR_ANY_INIT
	Initialize an IPv6 local host address.
#define	IN6ADDR_LOOPBACK_INIT
	Initialize an IPv6 loopback address.
#define	INET_ADDRSTRLEN   16
	Length of a string form of a maximal IPv4 address.
#define	INET6_ADDRSTRLEN   46
	Length of a string form of a maximal IPv6 address.
#define	IPPROTO_IP   0
	Internet Protocol Version 4.
#define	IPPROTO_ICMP   1
	Internet Control Message Protocol.
#define	IPPROTO_TCP   6
	Transmission Control Protocol.
#define	IPPROTO_UDP   17
	User Datagram Protocol.
#define	IPPROTO_IPV6   41
	Internet Protocol Version 6.
#define	IPPROTO_UDPLITE   136
	Lightweight User Datagram Protocol.
#define	IP_TTL   24
	TTL for unicast (get/set)
#define	IPV6_JOIN_GROUP   17
	Join a multicast group (set)
#define	IPV6_LEAVE_GROUP   18
	Leave a multicast group (set)
#define	IPV6_MULTICAST_HOPS   19
	Hop limit for multicast (get/set)
#define	IPV6_MULTICAST_IF   20
	Multicast interface (get/set)
#define	IPV6_MULTICAST_LOOP   21
	Multicasts loopback (get/set)
#define	IPV6_UNICAST_HOPS   22
	Hop limit for unicast (get/set)
#define	IPV6_V6ONLY   23
	IPv6 only – no IPv4 (get/set)
#define	IN6_IS_ADDR_UNSPECIFIED(a)
	Test if an IPv6 Address is unspecified.
#define	IN6_IS_ADDR_LOOPBACK(a)
	Test if an IPv6 Address is a loopback address.
#define	IN6_IS_ADDR_V4MAPPED(a)
	Test if an IPv6 Address is an IPv4 mapped address.
#define	IN6_IS_ADDR_V4COMPAT(a)
	Test if an IPv6 Address is an IPv4 compatibility address.
#define	IN6_IS_ADDR_LINKLOCAL(a)
	Test if an IPv6 Address is a link-local address.
#define	IN6_IS_ADDR_SITELOCAL(a)
	Test if an IPv6 Address is a site-local address.
#define	IN6_IS_ADDR_MULTICAST(a)    ((a)->__s6_addr.__s6_addr8[0] == 0xFF)
	Test if an IPv6 Address is a multicast address.
#define	IN6_IS_ADDR_MC_NODELOCAL(a)
	Test if an IPv6 Address is a node-local multicast address.
#define	IN6_IS_ADDR_MC_LINKLOCAL(a)
	Test if an IPv6 Address is a link-local multicast address.
#define	IN6_IS_ADDR_MC_SITELOCAL(a)
	Test if an IPv6 Address is a site-local multicast address.
#define	IN6_IS_ADDR_MC_ORGLOCAL(a)
	Test if an IPv6 Address is an organization-local multicast address.
#define	IN6_IS_ADDR_MC_GLOBAL(a)
	Test if an IPv6 Address is a global multicast address.

Typedefs
typedef uint16_t	in_port_t
	16-bit type used to store a value for an internet port.
typedef uint32_t	in_addr_t
	32-bit value used to store an IPv4 address.

Variables
const struct in6_addr	in6addr_any
	IPv6 local host address.
const struct in6_addr	in6addr_loopback
	IPv6 loopback address.

Detailed Description

Definitions for the Internet address family.

This file contains the standard definitions (as directed by the POSIX 2008 standard) for internet-related functionality in the AF_INET address family. This does is not guaranteed to have everything that one might have in a fully-standard compliant implementation of the POSIX standard.

Author

Lawrence Sebald

Macro Definition Documentation

s6_addr

#define s6_addr   __s6_addr.__s6_addr8