Just document that if you connect with the TCP_FASTOPEN flag you can potentially get ECONNREFUSED from whatever later call you use to write data to the socket.
Posted Aug 2, 2012 22:56 UTC (Thu) by nix (subscriber, #2304)
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Quite. The set of errors in the manpages (and, indeed, in POSIX) is not a total set -- the kernel is allowed to return other errors, though it is perhaps unwise to expect callers to expect those errors.