This project is representing a virtual network routing among virtual nodes that connecting via interfaces. Each packet goes to its destination using routing algorithms and finds its way between nodes. It uses Distance Vector routing protocol for routing and forwarding messages. It also supports the Traceroute command to find nodes and interfaces.

Install vagrant software and then in project directory run

vagrant up

Vagrant configs are to run a virtual machine on your computer. You had to install Virtual Box or other virtual machines. After that, you can connect to the virtual machine using vagrant ssh command.

NOTE: You also can make codes on your machine with standard c++ compiler g++.

You can write a network configs with bellow syntax.

node <node_name> <physical_ip>
<node_name1> <-> <node_name2>

For example a net config for a tree could be something like this :

node A localhost
node B localhost
node C localhost
node D localhost
node E localhost
A <-> B
B <-> C
C <-> D
C <-> E

After writing a config, you should make some lnx file that will run with each node program.

./tools/netconv config

After that some lnx file will be made. For example for node A in our tree nets we have something like this :

localhost 5000
localhost 5001 192.168.0.1 192.168.0.2
localhost 5003 192.168.0.10 192.168.0.9

NOTE: There is some example net config in net's folder.

After that it is time to run each node with a lnx file. first make codes :

make

then for running that for each node run this command :

./node <node_name>.lnx

With help command, you see how the whole node program works :

> help
- help, h: Print this list of commands
- interfaces, li: Print information about each interface, one per line
- routes, lr: Print information about the route to each known destination, one per line
- up [integer]: Bring an interface "up" (it must be an existing interface, probably one you brought down)
- down [integer]: Bring an interface "down"
- send [ip] [protocol] [payload]: sends payload with protocol=protocol to virtual-ip ip
- traceroute [ip]: show traceroute
- q: quit this node