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inet_ntop (3) | C library functions | Unix Manual Pages | :man

NAME

inet_ntop - Parse network address structures

CONTENTS

Synopsis
Description
Bugs

SYNOPSIS



#include <sys/types.h>

#include <sys/socket.h>

#include <arpa/inet.h>



"const char *inet_ntop(int ""af"", const void *""src",

" char *""dst"", socklen_t ""cnt");

DESCRIPTION

This function converts the network address structure src in the af address family into a character string, which is copied to a character buffer dst, which is cnt bytes long.

inet_ntop(3) extends the inet_ntoa(3) function to support multiple address families, inet_ntoa(3) is now considered to be deprecated in favor of inet_ntop(3). The following address families are currently supported:

-->
AF_INET
src points to a struct in_addr (network byte order format) which is converted to an IPv4 network address in the dotted-quad format, "ddd.ddd.ddd.ddd". The buffer dst must be at least INET_ADDRSTRLEN bytes long.
AF_INET6
src points to a 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 dst must be at least INET6_ADDRSTRLEN bytes long.

"RETURN VALUE"

inet_ntop returns a non-null pointer to dst. NULL is returned if there was an error, with errno set to EAFNOSUPPORT if af was not set to a valid address family, or to ENOSPC if the converted address string would exceed the size of dst given by the cnt argument.

"CONFORMING TO"

POSIX 1003.1-2001. Note that RFC 2553 defines a prototype where the last parameter cnt is of type size_t. Many systems follow RFC 2553. Glibc 2.0 and 2.1 have size_t, but 2.2 has socklen_t.

"SEE ALSO"

inet_pton(3)

BUGS


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