Layer3 interaction

Hello, since I am new to this list, I want to take the opportunity to thank your for your efforts. It is just awesome that one can do phonecalls with an open-source baseband stack. I'm new to the project and I'm searching a method to send prepared packets (Layer 3) to my basestation in my lab. I'm searching now for the best way to do so, is there already a script allowing me to perform that task? I couldn't find one when I searched. If there is none available I would try to build one using code located in layer23. I would be glad if you could point me to the method if there is already something available. With best regards