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)

Linux man-pages 6.7                                2023-10-31                                       inet_ntop(3)