This change adds the ability for peers to report additional candidate endpoints for other peers to attempt connections with outside of the endpoint reported by the coordinating server.
While not a complete solution to the full spectrum of NAT traversal issues (TURN-esque proxying is still notably missing), it allows peers within the same NAT to connect to each other via their LAN addresses, which is a win nonetheless. In the future, more advanced candidate discovery could be used to punch through additional types of NAT cone types as well.
Co-authored-by: Matěj Laitl <matej@laitl.cz>
The server now expects a UNIX timestamp after which the invitation will be expired. If a peer invite hasn't been redeemed after it expires, the server will clean up old entries and allow the IP to be re-allocated for a new invite.
Closes#24
Jake McGinty