DAWN does not see other APs until umdns is restarted

[mattaw]

Good afternoon! Thanks for the fantastic software.

Related bug on DAWN:

berlin-open-wireless-lab/DAWN#237

There seems to be a problem with umdns or DAWN that requires umdns to be restarted periodically. Specifically I was just hit with it on my two WAX218 APs running:

OpenWrt 23.05.5 r24106-10cc5fcd00 / LuCI openwrt-23.05 branch git-24.264.56413-c7a3562

umdns:

2024-03-04-7c675979-1

Upon reboot umdns shown running, but ubus call umdns update && ubus call umdns browse is an empty JSON file, returning only { }.

Restarting umdns fixes the issue shortly afterwards.

The issue linked suggested that when this situation happens to umdns it is no longer listening on any ports, I have not been able to run that as I restarted umdns so everything is currently working.