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Youness Alaoui authored
One issue with tcp-bsd is that it will queue messages when the tcp socket is not writable, but it will also drop messages when the queue is full. If we want to do proper reliable ice-tcp, we need to make sure that messages don't get dropped, also, this would affect http/socks5/pseudossl if their messages get dropped. For ice-tcp, when the socket is not writable we want to return 0, not queue the message. The change here is to allow connchecks and other important protocol messages to be sent as 'reliable' on tcp transports by queuing them and in the various socket layers and to never drop them, but all user messages will be dropped. if the tcp socket is not writable.
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