[Retracted] Vulnerability Digging for Software-Defined Network Controller Using Event Flow Graph Analysis

Algorithm 1

Static event flow graph constructing.

	Inputs: triple sequence S
	Outputs: static event flow graph G, event frequency table FreMat
(1)	G = {}, FreMat = {}
(2)	for node in sequence:
(3)	if node G:
(4)	FreMat[node]++
(5)	if node G:
(6)	G.addnode(node),
(7)	FreMat.add(node)
(8)	if(node.EventHandler),
(9)	G.addedge(node.EventHandler, node.Event, node.Time)
(10)	if(node.EventProvider),
(11)	G.addedge(node. EventProvider, node.Event, node.Time)