How to shuffle/randomize a linked list in C?

I am currently creating an UNO game in C. I have to use a linked list to create the deck (consisting of 108 cards). I need to implement a shuffle function to randomly shuffle the deck, but i am pretty lost on how to do that... if you could help me out by writing the shuffle function for me, that'd be awesome.

Here is a picture of the code I have so far.