altermac

• Taking inspiration from CS456, I made this simple MAC Address Changer for your device.

NOTE:

• I would suggest downloading and running this script in a virtual machine
• You would also need to use root permissions to run this script

Sample Usage:

make clean
make
sudo ./altermac eth0

• The above command changes the MAC address of your eth0 interface
• Looking at the eth0 interface by running ifconfig, you should be able to see that the MAC address under ether has changed

Working

strace -f ifconfig eth0 hw ether <NEW MAC ADDR> 2> output.txt

• You can use the above command to take a look at the functions and libraries called and undrestand how the command works

• Although the above command changes the MAC address, this project mimics the behind the scenes working of the above command

• A sample output is provided in the output.txt file

• Specifically, you would see that the following command was responsible for changing the MAC address:

ioctl(4, SIOCSIFHWADDR, {ifr_name="eth0", ifr_hwaddr={sa_family=ARPHRD_ETHER, sa_data=<New-MAC>}}) = 0