GTA 5 Protocol

I captured with wireshark the traffic of a GTA 5 session (on PC). I'd like to know if someone knows the structure of this game's packets. What I'd like to to is to capture usernames and their IPs. (Not for DDoSing).

Ofc its for Ddosing there no other reason for you wanting that info. Plus it's federal offense so if you get caught you better watch out you don't get bending over for that slipy soap

As I said, it's not for DDoSing, I'd like to make an external tool to create a private session by filtering IPs. The concept is to create a menu containing the list of players and select who can join and who can not.