Registered services aren't showing up when using standard tools to test

[dljsjr]

I'm trying to implement a very minimal service advertisement for use in some unit tests for a strictly client implementation in a different project. I'm more or less pattern matching directly off the code in the documentation; this is the current test main I'm using to eval the library:

fn main() {
    let dummy_service_daemon =
        mdns_sd::ServiceDaemon::new().expect("Could not create service daemon");

    let test_service_type = "_mytest._udp._local";
    let instance_name = "test_instance";
    let service_host_ipv4 = "192.168.1.176";
    let service_hostname = "192.168.1.176.local.";
    let port = 5200;

    let service_info = mdns_sd::ServiceInfo::new(
        test_service_type,
        instance_name,
        service_hostname,
        service_host_ipv4,
        port,
        None,
    );

    println!("Addresses: {:?}", &service_info.get_addresses());

    dummy_service_daemon
        .register(service_info)
        .expect("Failed to register test service");

    loop {
        std::thread::sleep(std::time::Duration::from_millis(100))
    }
}

The service does not seem to be advertised anywhere though. I've tested on both macOS using dns-sd and Ubuntu 20.04 using mdns-scan and the service does not show up. Some example commands I've tried:

$> dns-sd -B _services._udp. local. (this should show all dns-sd services)
$> dns-sd -B _mytest_.udp local. (a direct query against the service type, still shows nothing)

I'm not sure if this is a bug or if there is something missing from the docs that I haven't done correctly here. Thanks for any help you can provide with this!

[keepsimple1]

let test_service_type = "_mytest._udp._local";

The type should end with ".local." . Could you please try that? Then you can try

dns-sd -B _mytest_.udp. or dns-sd -B _mytest_.udp. local.

I've not used -B _services._udp. local., will check that out.

[dljsjr]

🤦 it was the _ before local, which I knew shouldn't be there and I just made a copy paste bug. That said, the server still only responds to direct queries and not the "browse all" query.

[dljsjr]

Also it's _services._dns-sd._udp.local., I haven't had enough coffee yet (still doesn't work though)

[keepsimple1]

I tried the following works:

$ dns-sd -B _services._dns-sd._udp.

or

$ dns-sd -B _services._dns-sd._udp. local.

i.e. no local. or give a space before local.

[dljsjr]

That's how I'm testing and it's not working 🤔

[keepsimple1]

Looks like I saw it working only because it's in local machine and in dns buffer. Currently our code does not really support wildcard query as I didn't know about it before. It's a missing feature we need to support.

Meantime, is it okay for you to use the direct name query? or is the wildcard support a blocker?

[dljsjr]

The direct name query is fine for my unit tests, thanks!

[keepsimple1]

PR is submitted to fix this issue. My local test seems to be good. If you can help testing the PR branch wildcard, that will be great! Thanks.

[keepsimple1]

PR merged. You can try it using the latest from this git repo main branch.

[keepsimple1]

New crate version v0.4.2 released. Please help check that fixes the issue for you. Thanks!

[dljsjr]

Looking good to me!