typedef void (*SilcSocketStreamCallback)(SilcSocketStreamStatus status,
                                             SilcStream stream,
                                             void *context);

    Callback function of this type is called after the socket stream
    creation is completed.  If the `stream' is NULL the socket stream could
    not be created or the socket connection is not otherwise allowed.  The
    `status' will indicate the error status.  In case error ocurrs the
    associated socket has already been destroyed.  The `stream' is socket
    stream representing the socket connection and silc_socket_stream_*
    functions can be used to access the stream.  All other silc_stream_*
    functions can also be used to read data, send data, and otherwise
    handle the stream.

    If the silc_stream_set_notifier is called the stream will be set to
    non-blocking mode.