Is it possible to only read from the CANBUS socket and not be able to write to it?

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Yes, it is possible to only read from the CANBUS socket and not be able to write to it. This can be achieved by setting the socket to "read-only" mode, which prevents any data from being transmitted over the CANBUS. This can be useful in applications where you only need to monitor the data on the bus, without the need to modify or control it.