def get_local_ip(): """ Returns a deferred which will be called with a 2-uple (lan_flag, ip_address) : - lan_flag: - True if it's a local network (RFC1918) - False if it's a WAN address - ip_address is the actual ip address @return: A deferred called with the above defined tuple @rtype: L{twisted.internet.defer.Deferred} """ # first we try a connected udp socket, then via multicast logging.debug("Resolving dns to get udp ip") try: ipaddr = yield reactor.resolve('A.ROOT-SERVERS.NET') except: pass else: udpprot = DatagramProtocol() port = reactor.listenUDP(0, udpprot) udpprot.transport.connect(ipaddr, 7) localip = udpprot.transport.getHost().host port.stopListening() if is_bogus_ip(localip): raise RuntimeError, "Invalid IP address returned" else: defer.returnValue((is_rfc1918_ip(localip), localip)) logging.debug("Multicast ping to retrieve local IP") ipaddr = yield _discover_multicast() defer.returnValue((is_rfc1918_ip(ipaddr), ipaddr))
def get_local_ip(): """ Returns a deferred which will be called with a 2-uple (lan_flag, ip_address) : - lan_flag: - True if it's a local network (RFC1918) - False if it's a WAN address - ip_address is the actual ip address @return: A deferred called with the above defined tuple @rtype: L{twisted.internet.defer.Deferred} """ # first we try a connected udp socket, then via multicast logging.debug("Resolving dns to get udp ip") try: ipaddr = yield reactor.resolve('A.ROOT-SERVERS.NET') except: pass else: udpprot = DatagramProtocol() port = reactor.listenUDP(0, udpprot) udpprot.transport.connect(ipaddr, 7) localip = udpprot.transport.getHost().host port.stopListening() if is_bogus_ip(localip): raise RuntimeError("Invalid IP address returned") else: defer.returnValue((is_rfc1918_ip(localip), localip)) logging.debug("Multicast ping to retrieve local IP") ipaddr = yield _discover_multicast() defer.returnValue((is_rfc1918_ip(ipaddr), ipaddr))
def _got_multicast_ip(ipaddr): """ Called when we received the ip address via udp multicast. @param ipaddr: an ip address @type ipaddr: a string "x.x.x.x" """ return (is_rfc1918_ip(ipaddr), ipaddr)
def _get_via_connected_udp(ipaddr): """ Init a UDP socket ip discovery. We do a dns query, and retreive our ip address from the connected udp socket. @param ipaddr: The ip address of a dns server @type ipaddr: a string "x.x.x.x" @raise RuntimeError: When the ip is a bogus ip (0.0.0.0 or alike) """ udpprot = DatagramProtocol() port = reactor.listenUDP(0, udpprot) udpprot.transport.connect(ipaddr, 7) localip = udpprot.transport.getHost().host port.stopListening() if is_bogus_ip(localip): raise RuntimeError, "Invalid IP addres returned" else: return (is_rfc1918_ip(localip), localip)