kevinbird61 / virtual-router

Using tuntap to simulate router port, implement software router and related network functions with C.

Virtual router

Using tuntap to simulate router port, and C to implement software router and related network functions.

We demostrate this virtual router with 2 router ports for simplicity. All environment can be run on single computer with linux network virtualization support.

1. Using namespace to simulate host machine.
2. Using tuntap client to simulate router's port.
3. Using virtual link (veth) to connect namespace with our ports in bridge.

How to use

• Build demo topology
  • ./.scripts/create_topo.sh
• Build and run virtual router
  • make
  • ./router.exe -i tap0 tap1
• Run the traffic
  • ping
    • h1 to h2: ip netns exec h1 ping 10.0.1.1
    • h1 to port0: ip netns exec h1 ping 10.0.0.2
    • h2 to h1: ip netns exec h2 ping 10.0.0.1
    • h2 to port1: ip netns exec h2 ping 10.0.1.2

Contact

• Kevin Cyu, [email protected]