Did you get permission from OpenDNS and Icanhazip? If not, you are effectively launching a distributed attack against them with worthless traffic.

If you don't understand what I mean - just pull the project and do some more research before you release something like this.

Launching a distributed attack by publishing a crate which makes one request? XD

You can relax, I know how they work. My final year project was about DoS. I would send you the link but it's Spanish.

But I can say you I've written a tool to implement this vector (among others) against VoIP services and it was presented even at the BlackHat conference.