.\" Copyright 2000 Sam Varshavchik <mrsam@stop.mail-abuse.org>
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.TH inet_ntop 3  "May 18, 2000" "Linux Man Page" "Linux Programmer's Manual"
.SH NAME
inet_ntop - Parse network address structures
.SH SYNOPSIS
.nf
.B "#include <sys/types.h>
.B "#include <sys/socket.h>
.B "#include <arpa/inet.h>
.sp
.BI "const char *" "p" "=inet_ntop(int " "af" ", const void *" "src" ",
.BI "                        char *" "dst" ", size_t " "cnt" ");
.SH DESCRIPTION
This function converts the network address structure
.I src
in the
.I af
address family into a character string, which is copied to a character buffer
.IR dst ,
which is
.I cnt
bytes long.

.BR inet_ntop (3)
extends the
.BR inet_ntoa (3)
function to support multiple address families,
.BR inet_ntoa (3)
is now considered to be deprecated in favor of
.BR inet_ntop (3).
The following address families are currently supported:
.TP 14
.B AF_INET
.I src
points to a
.I "struct in_addr"
(network byte order format)
which is converted to an IPv4 network address in
the dotted-quad format, "\fIddd.ddd.ddd.ddd\fP".
The buffer
.I buf
must be at least
.B INET_ADDRSTRLEN
bytes long.
.TP 14
.B AF_INET6
.I src
points to a
.IR "struct in6_addr"
(network byte order format)
which is converted to a representation of this address in the
most appropriate IPv6 network address format for this address.
The buffer
.I buf
must be at least
.B INET6_ADDRSTRLEN
bytes long.
.SH RETURN VALUES
.B inet_ntop
returns a non-null pointer to
.IR buf .
NULL is returned if there was an error, with
.I errno
set to
.B EAFNOSUPPORT
if
.I af
was not set to a valid address family,
or to
.B ENOSPC
if the converted address string would exceed the size of
.IR buf ,
given by the
.I cnt
argument.
.SH "SEE ALSO"
.BR inet_pton (3)
.SH BUGS
.B AF_INET6
converts
IPv6-mapped IPv4 addresses
into an IPv6 format.