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Cheng Sheng
1ceeccbbc0
When a user doesn't need an exact port, but cares more about getting SOME unused port, they can do: * Create a socket outside with port=None or port=0. * Use socket.getsockname()[1] to get the allocated port and pass to the TCP client somehow. * Use the created socket to create a TCP server transport. Use-case: unit-testing embedded software that implements a BLE host. The controller will be a Bumble controller, connected to the host via a TCP channel. * The host will have a TCP-client HCI transport for testing. * The pytest setup code will allocate the TCP server and pass the port number to the host. Also add some unittests with python mock.