var Client = require('node-ssdp').Client
    , client = new Client();

client.on('response', function (headers, statusCode, rinfo) {
    console.log('Got a response to an m-search.',headers);
});

// search for a service type 
client.search('urn:schemas-upnp-org:service:DeviceServer:1');

// Or get a list of all services on the network 

//client.search('ssdp:all');