hooks: reserver only high-ports to limit possibility of hitting port from rhodecode stack

rhodecode/lib/hooks_daemon.py

@@ -25,6 +25,7 b' import tempfile'
 import traceback
 import threading
 import socket
+import random
 
 from BaseHTTPServer import BaseHTTPRequestHandler
 from SocketServer import TCPServer
@@ -156,13 +157,19 b' class HttpHooksCallbackDaemon(ThreadedHo'
     def get_hostname(self):
         return socket.gethostname() or '127.0.0.1'
 
-    def get_available_port(self):
-        mysocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-        mysocket.bind((self.get_hostname(), 0))
-        port = mysocket.getsockname()[1]
-        mysocket.close()
-        del mysocket
-        return port
+    def get_available_port(self, min_port=20000, max_port=65535):
+        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        hostname = self.get_hostname()
+
+        for _ in range(min_port, max_port):
+            pick_port = random.randint(min_port, max_port)
+            try:
+                sock.bind((hostname, pick_port))
+                sock.close()
+                del sock
+                return pick_port
+            except OSError:
+                pass
 
     def _prepare(self, txn_id=None, host=None, port=None):
         if not host or host == "*":