diff --git a/client.py b/client.py
index c51af50..a2491c4 100755
--- a/client.py
+++ b/client.py
@@ -127,7 +127,6 @@ class BitStream():
 
     def pushString(self, valeur):
         size=len(valeur)
-        print(size)
         #self.internalSerial(size, 32)
         self.pushUint32(len(valeur))
         for x in valeur:
@@ -235,9 +234,14 @@ class BitStream():
         # return str(self._pos) + ':' + str(self._tampon)
         return str(self._pos) + ':' + '.'.join([ format(x, "02x") for x in self._tampon])
 
-    def bytes(self):
+    def toBytes(self):
         return bytes( self._tampon )
 
+    def fromBytes(self, data):
+        self._read = 0
+        self._tampon = [int(x) for x in data]
+        self._pos = len(self._tampon) * 8
+
 def Test():
     a = BitStream()
     a.pushBool(True)
@@ -256,7 +260,8 @@ def Test():
     a.pushSint64(-1)
     a.pushChar('a')
     a.pushString("Test A Faire")
-    print("A6:", a)
+    print('raw:', a)
+    print("-" * 80)
     print(a.readBool())
     print(a.readBool())
     print(a.readBool())
@@ -273,7 +278,27 @@ def Test():
     print(a.readSint64())
     print(a.readChar())
     print(a.readString())
-    print(a.bytes())
+    print(a.toBytes())
+    print("-" * 80)
+    b = BitStream()
+    b.fromBytes(a.toBytes())
+    print(b.readBool())
+    print(b.readBool())
+    print(b.readBool())
+    print(b.readBool())
+    print(b.readUint32())
+    print(b.readSint32())
+    print(b.readUint16())
+    print(b.readSint16())
+    print(b.readUint8())
+    print(b.readSint8())
+    print(b.readFloat())
+    print(b.readDouble())
+    print(b.readUint64())
+    print(b.readSint64())
+    print(b.readChar())
+    print(b.readString())
+    print(b.toBytes())
 
 
 class TConnectionState(IntEnum):
@@ -927,7 +952,6 @@ class CPersistentDataRecord:
                 tmp = int.from_bytes(buffer[offset:offset+4], byteorder='little', signed=False)
                 self.ArgTable.append(tmp)
                 offset += 4
-            print(self.ArgTable)
 
             # READ the string table data
             if self.stringsSize != 0:
@@ -1372,7 +1396,7 @@ class ClientNetworkConnection:
         msg.pushUint32(self.UserId)
         msg.pushString(self.LanguageCode)
 
-        self._sock.sendto(msg.bytes(), self.frontend)
+        self._sock.sendto(msg.toBytes(), self.frontend)
         self._CurrentSendNumber += 1
 
         self._ConnectionState = TConnectionState.Login
@@ -1386,15 +1410,34 @@ class ClientNetworkConnection:
         self.buildSystemHeader(msg)
         msg.pushUint8(8) # SYSTEM_LOGIN_CODE
         msg.pushSint32(self._QuitId) # _QuitId
-        self._sock.sendto(msg.bytes(), self.frontend)
+        self._sock.sendto(msg.toBytes(), self.frontend)
         self._ConnectionState = TConnectionState.Quit
 
+    def readDelta(self, msg):
+        propertyCount = msg.readUint16()
+        self.log.debug("propertyCount:%d" % propertyCount)
+        for _ in range(0, propertyCount):
+            pass
+
+    def impulseCallBack(self, data):
+        # code/ryzom/common/src/game_share/generic_xml_msg_mngr.h : CNode	*select(NLMISC::CBitMemStream &strm)
+        msg = BitStream()
+        msg.fromBytes(data)
+        serverTick = msg.readUint32()
+        self.log.debug("serverTick:%d" % serverTick)
+        #self.readDelta(msg)
+
     def EmulateFirst(self):
+        self.log.info("Client Login")
         self.sendSystemLogin()
 
-        for _ in range(1, 20): # while True:
+        self.log.info("Receive Message")
+        for _ in range(0, 20): # while True:
             data, addr = self._sock.recvfrom(1024) # buffer size is 1024 bytes
-            print( "received message:", data)
+            self.log.debug("received message: %s" % data)
+            self.impulseCallBack(data)
+
+        self.log.info("Client Logout")
         self.sendSystemQuit()
 
 
@@ -1407,7 +1450,8 @@ class ClientKhanat:
                  LanguageCode="fr",
                  url="/login/r2_login.php",
                  suffix = None,
-                 download_patch = False):
+                 download_patch = False,
+                 show_patch_detail=False):
         self.log = logging.getLogger('myLogger')
 
         if suffix is None:
@@ -1415,6 +1459,7 @@ class ClientKhanat:
             self.log.debug("suffix : %s" % suffix)
 
         self.download_patch = download_patch
+        self.show_patch_detail = show_patch_detail
         self.khanaturl = khanaturl
         self.login = login + suffix
         self.password = password
@@ -1615,8 +1660,9 @@ class ClientKhanat:
         self.khanat_idx.readFromBinFile(self.ryzomidx)
         self.khanat_idx.CProductDescriptionForClient_apply()
         # Show detail patch
-        self.khanat_idx.decrypt_token()
-        self.khanat_idx.show()
+        if self.show_patch_detail:
+            self.khanat_idx.decrypt_token()
+            self.khanat_idx.show()
         # Todo analyze patch and download if necessary or update if incremental - see category
         # Download all file in patch - login_patch.cpp:2578 # void CPatchThread::processFile (CPatchManager::SFileToPatch &rFTP)
         if self.download_patch:
@@ -1634,6 +1680,7 @@ def main():
     parser.add_argument("--suffix", help="define suffix")
     parser.add_argument("-d", "--debug", help="show debug message", action='store_true')
     parser.add_argument("-p", "--download-patch", help="show debug message", action='store_true')
+    parser.add_argument("-s", "--show-patch-detail", help="show debug message", action='store_true')
     args = parser.parse_args()
 
     if args.debug:
@@ -1642,10 +1689,10 @@ def main():
         level = logging.getLevelName('INFO')
     log.setLevel(level)
 
-    client = ClientKhanat(args.khanaturl, suffix=args.suffix, download_patch=args.download_patch)
+    client = ClientKhanat(args.khanaturl, suffix=args.suffix, download_patch=args.download_patch,  show_patch_detail=args.show_patch_detail)
     client.Emulate()
     log.info("End")
 
 if __name__ == "__main__":
-    main()
     #Test()
+    main()