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Previously, the return value and socket errors from the connect() call were checked in two different places: immediately after the call, and then later as the sockets were select()ed over. This led to a divergence of logic, so the immediate checking failed to set state reasons or contribute to timing. This commit puts all such checking into a single function, handleConnectResult, so further improvements will not diverge again.
Here is some documentation for Nmap, but these files are much less comprehensive than what you'll find at the actual Nmap documentation site ( http://nmap.org ).