3.2.5.2 Processing an RDPINPUT_CS_READY_PDU Message
The structure and fields of the RDPINPUT_CS_READY_PDU message are specified in section 2.2.3.2.
The header field MUST be processed as specified in section 3.1.5.1. If the message is valid, the server SHOULD use the value specified by the client in the maxTouchContacts field to initialize the touch injection subsystem.