Intelligent Blockchain-Based Secure Routing for Multidomain SDN-Enabled IoT Networks

Algorithm 1 Reputation update algorithm.

	Input: The unverified abstract topology in the blockchain uploaded by controller ; the set of controllers
	Output: the global reputation of controller
	1: The smart contract informs controllers to validate
	2: for alldo
	3: Send ICMP packets to validate edge switches
	4: if controller receives ICMP relies then
	5: Beta distribution parameter
	6: else
	7: Beta distribution parameter
	8: end if
	9: Estimate the local reputation
	10: Controller send to the smart contract
	11: end for
	12: The smart contract calculates controller ’s global reputation
	13: The smart contract makes the global reputation time decay,
	14: return