updated notes/comments.

tcp-proxy.py

@@ -20,18 +20,30 @@ class ProxyClientProtocol(protocol.Protocol):
         self.cli_queue.get().addCallback(self.serverDataReceived)
 
     def serverDataReceived(self, chunk):
-        # TODO: Line processing, and line cleaning (remove ANSI color codes)
+        # rlogin looks like this:  \x00 password \x00 username \x00 terminal/speed \x00
+        # b'\x00up2lat3\x00bugz\x00ansi-bbs/115200\x00'
+        # We're looking for 4 \x00!
+         # TODO: Line processing, and line cleaning (remove ANSI color codes)
         if chunk is False:
             self.cli_queue = None
             log.msg("Client: disconnecting from peer")
             self.factory.continueTrying = False
             self.transport.loseConnection()
+        elif b'\x00' in chunk:
+            # Hint:  User rlogin reversed in syncterm
+            log.msg("Maybe RLOGIN?")
+            parts = chunk.split(b'\x00')
+            user = parts[1].decode('utf-8')
+            log.msg("GREETINGS {0}!".format(user))
+            # b'\x00up2lat3\x00bugz\x00ansi-bbs/115200\x00'
+            self.transport.write(chunk)
+            self.cli_queue.get().addCallback(self.serverDataReceived)
         elif b"$" == chunk:
             self.factory.svr_queue.put(b"HELLO.\r\n")
             self.cli_queue.get().addCallback(self.serverDataReceived)           
         elif self.cli_queue:
             log.msg("Client: writing %d bytes to peer" % len(chunk))
-            log.msg(">>", chunk)
+            log.msg(">>", repr(chunk))
             self.transport.write(chunk)
             self.cli_queue.get().addCallback(self.serverDataReceived)
         else:
@@ -39,7 +51,7 @@ class ProxyClientProtocol(protocol.Protocol):
 
     def dataReceived(self, chunk):
         log.msg("Client: %d bytes received from peer" % len(chunk))
-        log.msg("<<", chunk)
+        log.msg("<<", repr(chunk))
         self.factory.svr_queue.put(chunk)
 
     def connectionLost(self, why):