I've run into an issue using DCD [1] on macOS where it crashes with the exception "Unable to set socket option: Invalid argument". This occurs when DCD calls "accept" on the Socket it's using. Accept will, through some calls, eventually call "setSock", which will on macOS set the socket option SO_NOSIGPIPE.

It turns out that this call can fail if the remote end has closed/reset the socket [2]. I believe the solution is to try to reconnect. Since the Socket class automatically sets the SO_NOSIGPIPE option on macOS, should the Socket class also try to automatically reconnect or is that something up to the user of the Socket class to do?

[1] https://github.com/dlang-community/DCD/issues/345
[2] https://lists.apple.com/archives/macnetworkprog/2008/Jan/msg00084.html

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/Jacob Carlborg