Plan 9 from Bell Labs’s /n/sources/patch/sorry/udp-reuse/notes

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Tue Jul 13 12:44:42 EDT 2010 geoff
    The original intent of SO_REUSE was to allow the reuse of a TCP port
    before the FIN_WAIT timeouts had happened, so that daemon could be
    restarted without having to wait several minutes.  This use of it
    with UDP sounds dubious and ill-advised.  Why not just use different
    port numbers if you need multiple server instances?


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