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NAME

in.h, in - Internet Protocol family
 

SYNOPSIS

#include <netinet/in.h> 

DESCRIPTION

The <netinet/in.h> header defines the following types through typedef:

in_port_t

An unsigned integral type of exactly 16 bits.

in_addr_t

An unsigned integral type of exactly 32 bits. The <netinet/in.h> header defines the in_addr structure that includes the following member:

The <netinet/in.h> header defines the in_addr structure that includes the following member:

in_addr_t       s_addr

The <netinet/in.h> header defines the type sa_family_t as described in socket.h(3HEAD).

The <netinet/in.h> header defines the following macros for use as values of the level argument of getsockopt() and setsockopt():

IPPROTO_IP

Dummy for IP

IPPROTO_ICMP

Control message protocol

IPPROTO_TCP

TCP

IPPROTO_UDP

User datagram protocol The <netinet/in.h> header defines the following macros for use as destination addresses for connect(), sendmsg(), and sendto():

INADDR_ANY

Local host address

INADDR_BROADCAST

Broadcast address

The <netinet/in.h> header defines the sockaddr_in structure that is used to store addresses for the Internet protocol family. Values of this type must be cast to struct sockaddr for use with the socket interfaces.  

Default

For applications that do not require standard-conforming behavior (those that use the socket interfaces described in section (3SOCKET) of the reference manual; see Intro(3) and standards(5)), the <netinet/in.h> header defines the sockaddr_in structure that includes the following members:

sa_family_t     sin_family
in_port_t       sin_port
struct in_addr  sin_addr
char            sin_zero[8]

Standard conforming

For applications that require standard-conforming behavior (those that use the socket interfaces described in section (3XNET) of the reference manual; see Intro(3) and standards(5)), the <netinet/in.h> header defines the sockaddr_in structure that includes the following members:

sa_family_t     sin_family
in_port_t       sin_port
struct in_addr  sin_addr
unsigned char   sin_zero[8]

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE Interface Stability Standard

SEE ALSO

Intro(3), connect(3SOCKET), connect(3XNET), getsockopt(3SOCKET), getsockopt(3XNET), sendmsg(3SOCKET), sendmsg(3XNET), sendto(3SOCKET), sendto(3XNET), setsockopt(3SOCKET), setsockopt(3XNET), socket.h(3HEAD), attributes(5), standards(5)

Index

NAME

SYNOPSIS

DESCRIPTION

Default

Standard conforming

ATTRIBUTES

SEE ALSO

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