Perhaps too general matching responses?

[pragdave]

I'm not too familiar with mdns, so perhaps this is how it is supposed to work, but...

I have a Node.js service that I'm advertising as trace-appliance._trap-tracer._udp.local.

In my Elixir app, I query for that string.

Tracing the handle_info callbacks, I see messages such as those down below.

The first is a correct response, giving the IP and port of my service.

The others however are responses for the AFP service. They've been selected because the list of services they contain includes what I'm guessing are all the services advertised by my box.

Looking at the code, the mdns client seems to accept a message if any of the services it contains is a substring of the query.

Am I using it incorrectly?

Dave

==================================================
{:"trace-appliance._trap-tracer._udp.local",
 %Mdns.Client.Device{
   domain: "laptop.lan.local",
   ip: {192, 168, 86, 173},
   payload: %{},
   port: 51516,
   services: ["trace-appliance._trap-tracer._udp.local",
    "_trap-tracer._udp.local"]
 }}
==================================================
{:"trace-appliance._trap-tracer._udp.local",
 %Mdns.Client.Device{
   domain: "laptop.local",
   ip: {192, 168, 86, 173},
   payload: %{},
   port: 7000,
   services: [
     <<192, 56, 0, 4, 64, 0, 0, 8>>,
     "laptop.local",
     <<192, 12, 0, 5, 0, 0, 128, 0, 64>>,
     "laptop._airplay._tcp.local",
     "trace-appliance._trap-tracer._udp.local",
     "_trap-tracer._udp.local"
   ]
 }}
==================================================
{:"trace-appliance._trap-tracer._udp.local",
 %Mdns.Client.Device{
   domain: "laptop.local",
   ip: {192, 168, 86, 173},
   payload: %{},
   port: 7000,
   services: [
     <<192, 66, 0, 4, 64, 0, 0, 8>>,
     "laptop.local",
     <<192, 12, 0, 5, 0, 0, 128, 0, 64>>,
     "F01898668893@laptop._raop._tcp.local", 
     <<192, 56, 0, 4, 64, 0, 0, 8>>,
     "laptop._airplay._tcp.local",
     "trace-appliance._trap-tracer._udp.local",
     "_trap-tracer._udp.local"
   ]
 }}