add hotspot proxy

hotspot_proxy.py

@@ -0,0 +1,53 @@
+from twisted.internet.protocol import DatagramProtocol
+from twisted.internet import reactor
+from time import time
+
+
+class Proxy(DatagramProtocol):
+
+    def __init__(self,ListenPort,connTrack,Timeout):
+        self.connTrack = connTrack
+        self.timeout = Timeout
+
+    def datagramReceived(self, data, addr):
+        host,port = addr
+        
+        if host == '127.0.0.1' and port in self.connTrack:
+            if int(self.connTrack[port]['time'])+self.timeout > time():
+                self.transport.write(data,(self.connTrack[port]['host'],self.connTrack[port]['sport']))
+            return
+        
+        for dport in self.connTrack:
+            if self.connTrack[dport]['host'] == host and self.connTrack[dport]['sport'] == port and (int(self.connTrack[dport]['time'])+self.timeout > time()):
+                self.connTrack[dport]['time'] = time()
+                self.connTrack[dport]['host'] = host
+                self.connTrack[dport]['sport'] = port
+                self.transport.write(data, ('127.0.0.1',dport))
+                self.connTrack[dport]['time'] = time()
+                return
+            
+        for dport in self.connTrack:
+            if (self.connTrack[dport]['time'] == False or (int(self.connTrack[dport]['time'])+self.timeout < time())):
+                self.connTrack[dport]['sport'] = port
+                self.connTrack[dport]['host'] = host
+                self.connTrack[dport]['time'] = time()
+                self.transport.write(data, ('127.0.0.1',dport))
+                return
+     
+
+
+if __name__ == '__main__':
+
+    ListenPort = 62031
+    DestportStart = 50000
+    DestPortEnd = 50300
+    Timeout = 60
+    
+    CONNTRACK = {}
+
+    for port in range(DestportStart,DestPortEnd,1):
+        CONNTRACK[port] = {'host': False,'time': False,'sport':False}
+
+    reactor.listenUDP(ListenPort,Proxy(ListenPort,CONNTRACK,Timeout))
+
+    reactor.run()