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.TH INET.H 3HEAD "Aug 30, 2002"
.SH NAME
inet.h, inet \- definitions for internet operations
.SH SYNOPSIS
.LP
.nf
\fB#include <arpa/inet.h>\fR
.fi

.SH DESCRIPTION
.LP
The <\fBarpa/inet.h\fR> header defines the type \fBin_port_t\fR, the type
\fBin_addr_t\fR, and the \fBin_addr\fR structure, as described in
\fBin.h\fR(3HEAD).
.sp
.LP
Inclusion of the <\fBarpa/inet.h\fR> header may also make visible all symbols
from \fBin.h\fR(3HEAD).
.sp
.LP
The following are declared as functions, and may also be defined as macros:
.sp
.in +2
.nf
in_addr_t       inet_addr(const char *);
in_addr_t       inet_lnaof(struct in_addr);
struct in_addr  inet_makeaddr(in_addr_t, in_addr_t);
in_addr_t       inet_netof(struct in_addr);
in_addr_t       inet_network(const char *);
char            *inet_ntoa(struct in_addr);
.fi
.in -2

.SS "Default"
.LP
For applications that do not require standard-conforming behavior (those that
use the socket interfaces described in section 3N of the reference manual; see
\fBIntro\fR(3) and \fBstandards\fR(5)), the following may be declared as
functions, or defined as macros, or both:
.sp
.in +2
.nf
uint32_t    htonl(uint32_t);
uint16_t    htons(uint16_t);
uint32_t    ntohl(uint32_t);
uint16_t    ntohs(uint16_t);
.fi
.in -2

.SS "Standard conforming"
.LP
For applications that require standard-conforming behavior (those that use the
socket interfaces described in section 3XN of the reference manual; see
\fBIntro\fR(3) and \fBstandards\fR(5)), the following may be declared as
functions, or defined as macros, or both:
.sp
.in +2
.nf
in_addr_t    htonl(in_addr_t);
in_port_t    htons(in_port_t);
in_addr_t    ntohl(in_addr_t);
in_port_t    ntohs(in_port_t);
.fi
.in -2

.SH ATTRIBUTES
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Standard
.TE

.SH SEE ALSO
.LP
\fBIntro\fR(3), \fBhtonl\fR(3C),
\fBinet_addr\fR(3C), \fBinet_addr\fR(3XNET), \fBin.h\fR(3HEAD),
\fBattributes\fR(5), \fBstandards\fR(5)