VMS Help TCPIP Services, Programming Interfaces, Sockets API, inet_lnaof()  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Returns the local network address portion of an internet address.
    Format
      #include  <in.h>
      #include  <inet.h>
      int inet_lnaof  ( struct in_addr in );

1 - Argument

 in
    An internet address.

2 - Description

    This function returns the local network address portion of a full
    internet address.
                                   NOTE
       The 64-bit return from OpenVMS Alpha systems has zero-
       extended bits in the high 32 bits of R0.

3 - Return Value

    x                  The local network address portion of an
                       internet address, in host byte order.