shreelakshmigbhat/flowguard-sdn-based-selective-packet-filtering

This is a small Ryu OpenFlow 1.3 controller application for selective packet dropping. On switch connection it installs a table-miss rule that sends unknown packets to the controller. For each packet-in, it drops IPv4 traffic from h1 to h2 by installing a higher-priority rule; other traffic follows MAC-learning forwarding, with unknown destinations flooded. The README describes a Mininet topology and ping/iperf and Wireshark observations, but the repository contains only the controller source, so those tools and network elements are represented as external. The graph reflects documented interactions; no topology or measurement implementation is present in the tree.