I'm attempting to use YAWCam on my university network. I am using it as an mjpg streamer that another application behind another network needs to access. Unfortunately, there is no way to port forward on my university network. enter udp-hole punching. I thought this was fantastic when I learned of it, but quickly realized that, unless I could figure out how to actually modify this program (which is not open source) I would not be able to make UDP hole punching work conventionally.
My question is, is there a way to hole punch without changing the original program? possibly by sending packets from the same port yawcam uses to punch the hole, and then let regular requests refresh it? I'm a bit new to netcode so Im not entirely sure what the "correct" method is for this.
No it is not possible. Two different programs can't bind to same port. The purpose of port numbers is to identify which running application instance to route the traffic to. if two applications were to each bind two sockets to the same port number, that routing becomes impossible.