FACSC: Fine-Grained Access Control Based on Smart Contract for Terminals in Software-Defined Network

<table class="algorithm-group"><tr><td><table class="algorithm" id="alg3"><tr><td>(1)</td><td>Terminal add Token to the Options field of the IP packet</td></tr><tr><td>(2)</td><td>Initiate access requests</td></tr><tr><td>(3)</td><td>if The terminal is nonfirst-time access then</td></tr><tr><td>(4)</td><td> P4FD parses the IP header of packets</td></tr><tr><td>(5)</td><td> if IHL = 0x05 then</td></tr><tr><td>(6)</td><td>  Discard the packets</td></tr><tr><td>(7)</td><td> end if</td></tr><tr><td>(8)</td><td> The packet is mirrored to the P4 control plane</td></tr><tr><td>(9)</td><td> The P4 parses the Options and get the Token</td></tr><tr><td>(10)</td><td> Query the Token from the cache database</td></tr><tr><td>(11)</td><td> if The Token exists and has not expired then</td></tr><tr><td>(12)</td><td>  Distribute the flow table in the p4 control plane</td></tr><tr><td>(13)</td><td> else</td></tr><tr><td>(14)</td><td>  Resend the IP packet with Options to the controller</td></tr><tr><td>(15)</td><td> end if</td></tr><tr><td>(16)</td><td>else</td></tr><tr><td>(17)</td><td> Perform the same operation as in the authentication phase</td></tr><tr><td>(18)</td><td>end if</td></tr></table></td></tr></table>

Security and Communication Networks

alg3

Algorithm 3

Algorithm 3: FACSC: Fine-Grained Access Control Based on Smart Contract for Terminals in Software-Defined Network 