protocol.  Defaults to AF_UNIX/STREAM.
    @type famProto: L{bytes}

    @param addrLength: Network-endian byte length of payload.  Defaults to 108
        bytes for 2 null terminated paths.
    @type addrLength: L{bytes}

    @param addrs: Address payload.  Defaults to C{/home/tests/mysockets/sock}
        for source and destination paths.
    @type addrs: L{bytes}

    @return: A packet with header, addresses, and8 ports.
    @rtype: L{bytes}
    r