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 _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)
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)
