VMS Help TCPIP Services, Programming Interfaces, RPC Server Routines, svcudp_bufcreate  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Creates an ONC RPC server handle for a buffered I/O UDP
    connection.
    Format
      #include  <rpc/rpc.h>
      SVCXPRT  *svcudp_bufcreate(int sock, u_int sendsize, u_int
               recvsize);

1 - Arguments

 sock
    The socket with which the connection is associated. If sock is
    RPC_ANYSOCK, then this routine opens a new socket and sets sock.
 sendsize
    The size of the send buffer. If you specify 0, the routine
    chooses a suitable default.
 recvsize
    The size of the receive buffer. If you specify 0, the routine
    chooses a suitable default.

2 - Description

    Creates an RPC server handle using the UDP transport, to
    which it returns a pointer. Upon completion, xprt->xp_sock is
    the transport's socket descriptor, and xprt->xp_port is the
    transport's port number. The service is automatically registered
    as a transporter (thereby including its socket in svc_fds such
    that its socket descriptor is included in all RPC select system
    calls).

3 - Return Values

    SVCXPRT *          A pointer to the server handle.
    NULL               Indicates failure.