dnssd Browse example only works with full service strings

I tried the browse example to test out lookup of all services.

Using just _tcp yields no results. Compare that to avahi-browse _tcp wich yields a lot of results

./browse -Type _tcp
Browsing for _tcp.local.
DATE: –––Wed Mar 1 2023–––
16:08:35.855  ...STARTING...
Timestamp	A/R	if Domain	Service Type	Service Name
^C

However I get results with a broader query

./browse -Type _googlecast._tcp
Browsing for _googlecast._tcp.local.
DATE: –––Wed Mar 1 2023–––
16:09:43.070  ...STARTING...
Timestamp	A/R	if Domain	Service Type	Service Name
16:09:43.164	Add	wlp0s20f3	local	_googlecast._tcp	Google-Nest-Mini-6147e2ff355612c5da0029f5a82002a2 ([192.168.1.26])
16:09:43.165	Add	wlp0s20f3	local	_googlecast._tcp	M65Q7-H1-a4cbf4829ec90c72e9f4e42c2b2ca294 ([192.168.1.103])
^C

Mar 01 '23 21:03 JAlexoid

You are right, browsing for service type _tcp gives you no results. Comparing with dns-sd on a Mac where you also get no results because _tcp specifies the transport protocol and not the service type.

Mar 02 '23 09:03 brutella

Is there a way to get that result?

If no - would you accept a PR allowing "query for all" and "query on protocol only"?

Mar 02 '23 14:03 JAlexoid