From fbbcb60ebae0299616dda2f1a2fd7703160d138a Mon Sep 17 00:00:00 2001
From: Michel Oosterhof <michel@oosterhof.net>
Date: Sat, 7 Nov 2015 19:59:27 +0000
Subject: [PATCH] check we're still connected in writeln

---
 cowrie/core/protocol.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/cowrie/core/protocol.py b/cowrie/core/protocol.py
index 5053751..51c54f1 100644
--- a/cowrie/core/protocol.py
+++ b/cowrie/core/protocol.py
@@ -127,8 +127,10 @@ class HoneyPotBaseProtocol(insults.TerminalProtocol, TimeoutMixin):
             self.cmdstack[-1].lineReceived(line)
 
     def writeln(self, data):
-        self.terminal.write(data)
-        self.terminal.nextLine()
+        # sometimes still called after disconnect because of a deferred
+        if self.terminal:
+            self.terminal.write(data)
+            self.terminal.nextLine()
 
     def call_command(self, cmd, *args):
         obj = cmd(self, *args)