Static Network Router

This project is a network router application programmed in C and configured with a static routing table. Upon receiving raw Ethernet frames, the router processes the packets just like a real router and then forward them to the correct outgoing interface. Following standard ARP and IP protocols and longest prefix match, the router handles ARP packets and forwards IP packets. Some of the operations supported by the router are

• ping to and through the router.
• traceroute to and through the router.
• Downloading files from HTTP servers using wget/curl.

Implemented Protocols

Following protocols are implemented for correct functionality of router

• Ethernet
• ARP
• IP
• ICMP

Installation

• Download/clone the project on your machine and go to the project folder.
• To install type make in the terminal.
• To run type ./sr in the terminal.

Topology

To test router functionality, Mininet is used. Mininet, a software package developed at Stanford, allows to emulate a topology on a single machine. It provides the isolation between the emulated nodes so that router node can process and forward real Ethernet frames between the hosts like a real router. Following topology is emulated on Mininet for this project.

-------------                ------------
| server1   |                | server2  |
-------------                ------------
     |                            |
     |                            |
      ------------     -----------
                  |   |
               ------------                  
               | router   |                  
               ------------
                    |
               ------------                  
               | client   |                  
               ------------