multi platform game that involves physical proximity of players

Hi all! We're thinking about using Unity3D for a multi platform game that involves physical proximity of players. We're thinking about doing this using a WiFi-Direct connection, and are considering Unity3D as the platform.

Do you think that the Wifi-Direct can be done using Unity?

We're thinking about having this app be a server & client as the same time.

Thoughts & recommendations?

Thanks!