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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 3.53 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)