Implement mDNS announcer

[Timvrakas]

There's a few things I want to think about

• UDP stream to any IP address based on a TCP request. Need to stop and restart UDP loop when a new request comes in. We had this working with Flynn's 140e demo.
• DHCP
• mDNS
• Some sort of MAC address derivation scheme

[mikh3x4]

First point is now implemented

[mikh3x4]

I’m also slightly worried about dhcp giving the ip for launch critical components

[Timvrakas]

Yeah I agree. What I landed on was having the first section of the subnet (like 0-32) be reserved for static devices, and the rest allocated with DHCP. In particular

• quail
• telemetry proxy server (the backend)
• cameras

Were all static.

I think MDNS could be cool. You can avoid IP addresses entirely (just use auto-generated link-local addresses) and have quail-etc advertise "I have a TCP telemetry server on X port" and then the backend can just scan the network and connect to all devices. If you had multiple embedded nodes and wanted to be able to reconfigure without re-flashing, that's how you would handle it I think.

The security cameras already advertise themselves over mDNS!