untested pseudo code

If a read is in progress when the 10 seconds times out, then the heartbeat will be delayed until the read completes.

much simpler solution though

Two processes will be able to send to the same remote port 'simultaneously' -- thought the tcpip stack will serialise those communications.

But can two concurrent processes talk from the same local port concurrently?

Neither scenario seems to fit the OPs exact description does it!

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

The start of some sanity?

In reply to Re^2: UDP connection by BrowserUk
in thread UDP connection by falstad

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