Serializes and deserializes opaque structures.
    Format
      #include  <tcpip$rpcxdr.h>
      bool_t  xdr_opaque(XDR *xdrs, char *op, u_int cnt);

1  –  Arguments

 xdrs
    A pointer to an XDR stream handle created by one of the XDR
    stream-handle creation routines.
 op
    A pointer to the opaque data.
 cnt
    The size of op in bytes.

2  –  Description

    A filter primitive that translates between fixed-size opaque data
    and its external representation. This routine treats the data
    as a fixed length of bytes and does not attempt to convert the
    bytes.

3  –  Return Values

    TRUE               Indicates success.
    FALSE              Indicates failure.