コード例 #1
0
ファイル: 0_1.py プロジェクト: karrikoivusalo/freeems-tuner
        def setPayloadId(self, id):
            '''Set payload id'''
            if isinstance(id, list):
                id = protocols.from8bit(id)

            self._payload_id = id
コード例 #2
0
ファイル: 0_1.py プロジェクト: karrikoivusalo/freeems-tuner
        def setPayloadLengthParsed(self, length):
            '''Save parsed payload length'''
            if isinstance(length, list):
                length = protocols.from8bit(length)

            self._payload_parsed_length = length
コード例 #3
0
ファイル: 0_1.py プロジェクト: karrikoivusalo/freeems-tuner
    def processIncomingPacket(self, packet):
        '''Takes a raw packet, checks it and returns the correct packet class'''

        # Quick checks to make sure this is a legitimate packet
        if not isinstance(packet, list):
            raise TypeError, 'Expected a list'

        if packet[0] != START_BYTE or packet[-1] != END_BYTE:
            raise Exception, 'Start and/or end byte missing'

        packet = self._unEscape(packet)

        contents = {}
        contents['flags'] = None
        contents['payload_id'] = None
        contents['payload'] = []
        contents['checksum'] = None

        index = 1

        # Grab flags
        contents['flags'] = flags = packet[index]
        index += 1

        # Grab payload id
        contents['payload_id'] = protocols.from8bit(packet[index:index+2])
        index += 2

        # Grab payload
        contents['payload'] = payload = packet[index:(len(packet) - 2)]
        index += len(payload)

        # Grab checksum
        contents['checksum'] = checksum = packet[index]
        index += 1

        # Check checksum
        gen_checksum = getChecksum(packet[1:index-1])

        if checksum != gen_checksum:
            raise Exception, 'Checksum is incorrect! Provided: %d, generated: %d' % (checksum, gen_checksum)

        # Just double check we only have one byte left
        if index != (len(packet) - 1):
            raise Exception, 'Packet incorrectly processed, %d bytes left' % (len(packet) - 1 - index)

        # Create response packet object
        if contents['flags'] & HEADER_IS_PROTO:
            packet_types = self._response_protocol_packets
        else:
            packet_types = self._response_firmware_packets

        try:
            type = packet_types[contents['payload_id']]
        except KeyError:
            type = 'responseGeneric'

        if not hasattr(self, type):
            type = 'responseGeneric'

        response = getattr(self, type)()

        # Populate data
        response.parseHeaderFlags(contents['flags'])
        response.setPayloadId(contents['payload_id'])
        response.parsePayload(contents['payload'])
        response.validate()

        return response