Introduce function to determine if ZT comms channel to peer is relayed #6447
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StephenCWills
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Step 3 for retrieving route information for players in your game session. The NDP protocol is used to look up the virtual MAC address of the peer based on their virtual IPv6 address. That MAC address is passed into the ZT core function we added in diasurgical/libzt#12 to get their peer info. The peer ID can then be cross-checked against the ZT event messages we receive in our callback function to determine the status of the connection between peers.
Based on some of the testing I've done so far, the connection is typically relayed for the first few seconds after you join someone's game, after which it gets updated to a direct route. I had been hoping it would be good enough to just display a message when the player joins a game regarding whether the connection to their peers is relayed, but it seems like that wouldn't work. Probably it would be better to display this on demand, like maybe in response to a textcmd entry.