No way to resolve mDNS hostnames

[G-glop]

The ESP8266 can do everything else with mDNS (advertise services, query services, set it's hostname), apart from the very important thing of querying hostnames.

ESP32 can do it with the MDNS.queryHost function, but it only wraps the one from the sdk, which lives inside a compiled binary. So it's no use for backporting it to the ESP8266.

This is all more unfortunate because the netBIOS library also cannot resolve hostnames

edit: madpilots mDNSResolver did the job, but the functinality should be part of the built in library

[RudyFiero]

From #4591 (comment)

Be aware that I am currently rewriting the mdns responder/query based on the idf implementation. It is very slow going, though, so it will take quite some time.

I am looking forward to this, but until then I make do with what we have.

[G-glop]

note: after a while it stops working, only use it a few times between restarts

[palmerabollo]

I'm also interested in this feature.
@G-glop do you mean that mDNSResolver suddenly stops working?

[G-glop]

@palmerabollo It stops working after about 20 resolutions, and it also blocks all other connections. Probably some kind of resource leak.

[kosso]

Glad to find this thread.

I found myself wondering why there was no ESP8266 equivalent to the ESP32 MDNS.queryHost() method, which makes life a whole lot easier.

Going to try mDNSResolver for now.

[RudyFiero]

I assume that someone made their own library and it had some basic functionality. And because it had useful features it was included in this framework. I don't believe it was ever claimed to be a full implementation.

[devyte]

Closing in view of #5442 with a full rewrite of mdns.