fix: CCN start/stop pack/unpack reverted for centralnode

* Stop the source of the data flow before stopping the sink

FofbTool/Operation.py

@@ -127,6 +127,10 @@ def stop_ccn(node_tangopath, ccnif=[]):
 
     logger.info("Stopping CCN on {}".format(node_tangopath))
     for n in ccnif:
+        if 'central' in node_tangopath:
+            prx["ccnunpack{}_control".format(n)] = False
+            prx["ccnpack{}_control".format(n)] = False
+        else:
             prx["ccnpack{}_control".format(n)] = False
             prx["ccnunpack{}_control".format(n)] = False
 
@@ -195,6 +199,10 @@ def start_ccn(node_tangopath, ccnif=[]):
     ack_ccn(node_tangopath, ccnif)
 
     for n in ccnif:
+        if 'central' in node_tangopath:
+            prx["ccnunpack{}_control".format(n)] = 1
+            prx["ccnpack{}_control".format(n)] = 1
+        else:
             prx["ccnpack{}_control".format(n)] = 1
             prx["ccnunpack{}_control".format(n)] = 1