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According to the following agreement how to write the client in QT unpacking read data?
Direction finding equipment data interface communication using TCP protocol, bottom direction finding equipment for the server, port 5021, starting 9 bytes of TCP packet data, including 4 bytes synchronous head 0 xdccdbaab, 1 byte data type, fixed for 2, 4 bytes (int) packet length (not including 9 bytes of data packets baotou),
