SDN Controller code in Python. Every DNS Packet is forwarded to the controller and the controller checks for prohibited sites against a database. If the site is prohibited it drops the packet.If not, it is allowed to go through with rules being establish with the usual l2-learning process. The base code is the simple_switch_13.py which comes with RYU installation. RYU doesn't provide a DNS packet parser. The parser was made with Python DPKT library.
aduggirala28/RYU-Controller-with-DNS-Parser
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