void silc_socket_set_qos(SilcSocketConnection sock,
                             SilcUInt32 read_rate,
                             SilcUInt32 read_limit_bytes,
                             SilcUInt32 limit_sec,
                             SilcUInt32 limit_usec,
                             SilcSchedule schedule)

    Sets a "Quality of Service" settings for socket connection `sock'.
    The `read_rate' specifies the maximum read operations per second.
    If more read operations are executed the limit will be applied for
    the reading.  The `read_limit_bytes' specifies the maximum data
    that is read.  It is guaranteed that silc_socket_read never returns
    more that `read_limit_bytes' of data.  If more is read the limit
    will be applied for the reading.  The `limit_sec' and `limit_usec'
    specifies the limit that is applied if `read_rate' and/or
    `read_limit_bytes' is reached.  The `schedule' is the application's
    scheduler.  If all arguments except `sock' are NULL or zero this
    resets the QoS from the socket, all QoS for this socket that may
    be pending will be cancelled.