Make sure that we close UDP sockets of local peer discovery

plugins/AnnounceLocal/BroadcastServer.py

@@ -1,6 +1,7 @@
 import socket
 import logging
 import time
+from contextlib import closing
 
 import msgpack
 
@@ -90,6 +91,7 @@ class BroadcastServer(object):
             message_part["sender"] = self.sender_info
 
             self.log.debug("Send to %s: %s" % (addr, message_part["cmd"]))
+            with closing(socket.socket(socket.AF_INET, socket.SOCK_DGRAM)) as sock:
                 sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
                 sock.sendto(msgpack.packb(message_part), addr)
 
@@ -108,6 +110,7 @@ class BroadcastServer(object):
 
         for my_ip in my_ips:
             try:
+                with closing(socket.socket(socket.AF_INET, socket.SOCK_DGRAM)) as sock:
                     sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
                     sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
                     sock.bind((my_ip, 0))