NAME

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

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <arpa/inet.h>

       const char *inet_ntop(int af, const void *restrict src,
                             char dst[restrict .size], 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 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 (in network byte order) 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

       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.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       ┌────────────────────────────────────────────────────────┬───────────────┬────────────────┐
       │Interface                                               │ Attribute     │ Value          │
       ├────────────────────────────────────────────────────────┼───────────────┼────────────────┤
       │inet_ntop()                                             │ Thread safety │ MT-Safe locale │
       └────────────────────────────────────────────────────────┴───────────────┴────────────────┘

STANDARDS

       POSIX.1-2008.

HISTORY

       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.

EXAMPLES

       See inet_pton(3).

SEE ALSO

       getnameinfo(3), inet(3), inet_pton(3)