INET_NTOP(3)		   Linux Programmer's Manual		  INET_NTOP(3)

NAME
       inet_ntop - convert IPv4 and IPv6 addresses from binary to text form

SYNOPSIS
       #include <arpa/inet.h>

       const char *inet_ntop(int af, const void *src,
			     char *dst, socklen_t size);

DESCRIPTION
       This  function  converts	 the  network  address structure src in the af
       address family into a character string.	The resulting string is copied
       to the buffer pointed to by dst, which must be a non-NULL pointer.  The
       caller specifies the number of bytes available in this  buffer  in  the
       argument size.

       inet_ntop()  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().	 The  following address families are currently
       supported:

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

       AF_INET6
	      src points to a struct in6_addr (in network byte order) which is
	      converted to a representation of this address in the most appro‐
	      priate IPv6 network address format for this address.  The buffer
	      dst must be at least INET6_ADDRSTRLEN bytes long.

RETURN VALUE
       On success, inet_ntop() returns a non-null pointer  to  dst.   NULL  is
       returned if there was an error, with errno set to indicate the error.

ERRORS
       EAFNOSUPPORT
	      af was not a valid address family.

       ENOSPC The  converted  address  string  would  exceed the size given by
	      size.

CONFORMING TO
       POSIX.1-2001.  Note that RFC 2553 defines a prototype  where  the  last
       argument	 size is of type size_t.  Many systems follow RFC 2553.	 Glibc
       2.0 and 2.1 have size_t, but 2.2 and later have socklen_t.

BUGS
       AF_INET6 converts IPv4-mapped IPv6 addresses into an IPv6 format.

EXAMPLE
       See inet_pton(3).

SEE ALSO
       getnameinfo(3), inet(3), inet_pton(3)

COLOPHON
       This page is part of release 3.15 of the Linux  man-pages  project.   A
       description  of	the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux				  2008-11-11			  INET_NTOP(3)

Vote for polarhome