diff --git a/trytond/protocols/common.py b/trytond/protocols/common.py
new file mode 100644
index 0000000000..e6d0a5cc8b
--- /dev/null
+++ b/trytond/protocols/common.py
@@ -0,0 +1,37 @@
+#This file is part of Tryton.  The COPYRIGHT file at the top level of
+#this repository contains the full copyright notices and license terms.
+import errno
+import os
+import socket
+import threading
+
+def endsocket(sock):
+    if os.name != 'nt':
+        try:
+            sock.shutdown(getattr(socket, 'SHUT_RDWR', 2))
+        except socket.error, e:
+            if e.errno != errno.ENOTCONN: raise
+        sock.close()
+
+class daemon(threading.Thread):
+    def __init__(self, interface, port, secure, name=None):
+        threading.Thread.__init__(self, name=name)
+        self.secure = secure
+        self.running = False
+        self.ipv6 = False
+        if socket.has_ipv6:
+            try:
+                socket.getaddrinfo(interface or None, port, socket.AF_INET6)
+                self.ipv6 = True
+            except Exception:
+                pass
+
+    def stop(self):
+        self.running = False
+
+    def run(self):
+        self.running = True
+        while self.running:
+            self.server.handle_request()
+        endsocket(self.server.socket)
+        return True