inet_ntop

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 ad-
       dress 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 ad-
       dress families, inet_ntoa(3) is now considered to be deprecated in  fa-
       vor  of inet_ntop().  The following address families are currently sup-
       ported:

       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 re-
       turned 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.

ATTRIBUTES
       For an  explanation  of  the  terms  used  in  this  section,  see  at-
       tributes(7).

       +------------+---------------+----------------+
       |Interface   | Attribute     | Value          |
       +------------+---------------+----------------+
       |inet_ntop() | Thread safety | MT-Safe locale |
       +------------+---------------+----------------+

CONFORMING TO
       POSIX.1-2001,  POSIX.1-2008.   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 5.05 of the Linux  man-pages  project.   A
       description  of  the project, information about reporting bugs, and the
       latest    version    of    this    page,    can     be     found     at
       https://www.kernel.org/doc/man-pages/.

Linux                             2017-09-15                      INET_NTOP(3)