diff --git a/scripts/proxy/srvside.py b/scripts/proxy/srvside.py
index 580daa9..74d4964 100644
--- a/scripts/proxy/srvside.py
+++ b/scripts/proxy/srvside.py
@@ -1,8 +1,12 @@
 # -*- coding: utf-8 -*-
 import os
 import json
+import random
+import time
+import threading
 import tornado.ioloop
 import tornado.web
+import tornado.gen
 import tornado.websocket
 import tornado.tcpserver
 
@@ -16,6 +20,12 @@ class ServerSide:
         self.local = None
         self.remote = None
         self.localHandlerHash = {}
+        self.localHandlerHashMutex = threading.Lock()
+        self.remoteConnIdx = 1000
+        self.remotePending = {}
+        self.remotePendingMutex = threading.Lock()
+        self.remoteConnHash = {}
+        self.remoteConnHashMutex = threading.Lock()
 
     def run(self):
         webapp = tornado.web.Application([
@@ -30,34 +40,125 @@ class ServerSide:
         self.remote = remote_server
         tornado.ioloop.IOLoop.instance().start()
 
-    def addRemoteConn(conn):
-        pass
+    def addRemoteConn(self, conn):
+        local_conn = self.randLocalConn()
+        if not local_conn:
+            return False
+        self.remotePendingMutex.acquire()
+        conn.idx = self.remoteConnIdx + 1
+        self.remoteConnIdx += 1
+        self.remotePending[conn.idx] = conn
+        conn.localSocket = local_conn
+        self.remotePendingMutex.release()
+        local_conn.SendMsg({
+            'remoteConnIdx' : conn.idx,
+            'cmd' : 'connect'
+        })
+        return True
 
-    def addLocalConn(conn):
+    def addLocalConn(self, conn):
+        self.localHandlerHashMutex.acquire()
         self.localHandlerHash[conn] = conn
+        self.localHandlerHashMutex.release()
 
-    def removeLocalConn(conn):
-        del self.localHandlerHash[conn]
+    def removeLocalConn(self, conn):
+        self.localHandlerHashMutex.acquire()
+        if conn in self.localHandlerHash:
+            self.remoteConnHashMutex.acquire()
+            try:
+                for remoteConn in self.remoteConnHash.values():
+                    if remoteConn.localSocket == conn:
+                        try:
+                            remoteConn.steam.close()
+                        except:
+                            pass
+            except:
+                pass
+            finally:
+                self.remoteConnHashMutex.release()
+            del self.localHandlerHash[conn]
+        self.localHandlerHashMutex.release()
+
+    def removeRemoteConn(self, conn):
+        self.remoteConnHashMutex.acquire()
+        if conn.idx in self.remoteConnHash:
+            del self.remoteConnHash[conn]
+        self.remoteConnHashMutex.release()
+
+    def randLocalConn(self):
+        self.localHandlerHashMutex.acquire()
+        try:
+            if len(self.localHandlerHash) <= 0:
+                return None
+            key = random.choice(list(self.localHanderHash.keys()))
+            return self.localHandlerHash[key]
+        finally:
+            self.localHandlerHashMutex.release()
+
+    def onLocalConnectOk(self, msg):
+        local_conn = None
+        self.remotePendingMutex.acquire()
+        if msg['remoteConnIdx'] in self.remotePending:
+            local_conn = self.remotePending[msg['remoteConnIdx']]
+            del self.remotePending[msg['remoteConnIdx']]
+        self.remotePendingMutex.release()
+
+        self.remoteConnHashMutex.acquire()
+        if local_conn:
+            self.remoteConnHash[local_conn.idx] = local_conn
+        self.remoteConnHashMutex.release()
+
+    def onLocalForwardData(self, msg):
+        self.remotePendingMutex.acquire()
+        if msg['remoteConnIdx'] in self.remotePending:
+            local_conn = self.remotePending[msg['remoteConnIdx']]
+            local_conn.steam.write(base64.b64decode(msg['data']))
+        self.remotePendingMutex.release()
+
+    def isConnectOk(self, connIdx):
+        isOk = False
+        self.remotePendingMutex.acquire()
+        isOk = connIdx not in self.remotePending
+        self.remotePendingMutex.release()
+        return isOk
 
 class RemoteServerConnection(object):
 
     def __init__(self, steam, address):
         self.steam = steam
         self.address = address
+        self.idx = 0
+        self.localSocket = None
 
     async def handle_stream(self):
         while True:
             try:
                 data = await self.stream.read_until(b"\n")
-                await self.stream.write(data)
+                self.localSocket.sendMsg({
+                    'cmd' : 'forwardData',
+                    'data' : base64.b64encode(data)
+                })
             except tornado.iostream.StreamClosedError:
                 break
+        #while
+        if self.localSocket:
+            self.localSocket.sendMsg({
+                'cmd' : 'socketClose',
+                'remoteConnIdx' : self.idx,
+            })
+        app.removeRemoteConn(self)
 
 class RemoteServer(tornado.tcpserver.TCPServer):
 
     async def handle_stream(self, stream, address):
         conn = RemoteServerConnection(steam, address)
-        app.addRemoteConn(conn)
+        if not app.addRemoteConn(conn):
+            stream.close()
+            return
+        yield gen.sleep(2)
+        if not app.isConnectOk(conn.connIdx):
+            stream.close()
+            return
         conn.handle_stream()
 
 class LocalSocketHandler(tornado.websocket.WebSocketHandler):
@@ -85,4 +186,14 @@ class LocalSocketHandler(tornado.websocket.WebSocketHandler):
             self.dispatchMsg(msg)
 
     def dispatchMsg(self, msg):
-        pass
+        if msg['cmd'] == 'connectOk':
+            app.onLocalConnectOk(msg)
+        elif msg['cmd'] == 'forwardData':
+            app.onLocalForward(msg)
+        elif msg['cmd'] == 'socketClose':
+            app.removeRemoteConn(msg['remoteConnIdx'])
+
+    def sendMsg(self, msg):
+        data = json.dumps(msg) + '\n'
+        self.write_message(data)
+