Heuristics for determining internet address of a node from the nodelist.

gistfile1.py

    def inet(self, for_flag=None):
        '''Attempt to return the IP address or hostname for this
        node.  If you specify for_flag, look for a service specific address
        first.  Returns address or address:port if successful; returns None
        if unable to determine an address from the nodelist.'''

        ip = None
        port = None

        for flag in self.flags:
            # If there is an address attache to the requested flag,
            # prefer it over anything else.  Note that unlike
            # binkd_nodelister, we stop at the first instance
            # of the flag right now.
            if flag.flag_name == for_flag and flag.flag_val is not None:
                if '.' in flag.flag_val:
                    if ':' in flag.flag_val:
                        ip, port = flag.flag_val.split(':')
                    else:
                        ip = flag.flag_val
                    break
                else:
                    port = flag.flag_val

        if ip is None:
            # If the system name looks like an address, use it.
            mo = re_hostname.match(self.name)
            if mo:
                ip = self.name

        if ip is None:
            # Use address from IP or INA flags.
            for flag in self.flags:
                if flag.flag_name == 'IP' and flag.flag_val:
                    ip = flag.flag_val
                elif flag.flag_name == 'INA' and flag.flag_val:
                    ip = flag.flag_val

        if ip is None:
            # Extract IP address from phone number field.  This
            # is apparently a Thing That is Done, but I'm not
            # sure it's FTSC kosher.
            mo = re_ip_in_phone.match(self.phone)
            if mo and not re_phone_all_zero.match(self.phone):
                ip = mo.group(1).replace('-', '.')

        if ip is not None and ':' in ip:
            # Split an ip:port specification.
            ip = ip.split(':')[0]

        if ip:
            return port and '%s:%s' % (ip, port) or ip