Index: twisted/internet/posixbase.py
===================================================================
--- twisted/internet/posixbase.py	(revisione 19570)
+++ twisted/internet/posixbase.py	(copia locale)
@@ -388,6 +388,23 @@
         p.startListening()
         return p
 
+    def listenUDPLite(self, port, protocol, interface='', maxPacketSize=8192):
+        """Connects a given L{DatagramProtocol} to the given numeric UDP port.
+
+        @returns: object conforming to L{IListeningPort}.
+        """
+        p = udp.Port(port, protocol, interface, maxPacketSize, self)
+        try:
+            p.socketProtocol = socket.getprotobyname("udplite")
+        except socket.error:
+            # System is not updated, use the assigned IANA value.
+            p.socketProtocol = 136
+        p.startListening()
+        UDPLITE_SEND_CSCOV = 10 # Actual coverage length 
+	# We checksum only UDP-lite header
+        p.getHandle().setsockopt(p.socketProtocol, UDPLITE_SEND_CSCOV, 8)
+        return p
+
     def connectUDP(self, remotehost, remoteport, protocol, localport=0,
                   interface='', maxPacketSize=8192):
         """DEPRECATED.
Index: twisted/internet/base.py
===================================================================
--- twisted/internet/base.py	(revisione 19570)
+++ twisted/internet/base.py	(copia locale)
@@ -719,9 +719,10 @@
 
     addressFamily = None
     socketType = None
+    socketProtocol = 0
 
     def createInternetSocket(self):
-        s = socket.socket(self.addressFamily, self.socketType)
+        s = socket.socket(self.addressFamily, self.socketType, self.socketProtocol)
         s.setblocking(0)
         if fcntl and hasattr(fcntl, 'FD_CLOEXEC'):
             old = fcntl.fcntl(s.fileno(), fcntl.F_GETFD)