My setup is a Linksys WMP54G PCI Wireless Adapter, using modified drivers, acting as a soft access point. Packet logging done by Wireshark.
So far, I have analyzed these stuff:
The client (DS) and server do a SSL Handshake while connecting.
Most data (except data about IPs/ports) is encrypted in an unknown encryption as of yet.
Data about IP/Ports is transmitted via UDP, not TCP
The protocol is the same even if you're using Plat or D/P (That's what it seems, please correct me if I'm wrong)
That's all I managed to recall (I forgot to save)