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 *restrict src,
                             char *restrict 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 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  ad‐
              dress 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 │
       └───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┴───────────────┴────────────────┘

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.

EXAMPLES
       See inet_pton(3).

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

Linux                                                                          2021-03-22                                                                   INET_NTOP(3)