public MdnsRecord Query(string serviceName)
{
byte[] data = MdnsQuery.Create(serviceName);
var _client = CreateClient();
MdnsRecord rec = null;
bool worked = false;
_client.Send(data, data.Length, new IPEndPoint(IPAddress.Parse(MdnsListener.MDNS_IP), MdnsListener.MDNS_PORT));
while (!worked)
{
try
{
var endpoint = new IPEndPoint(IPAddress.Any, MdnsListener.MDNS_PORT);
byte[] qData = _client.Receive(ref endpoint);
var record = new MdnsRecord(qData);
if (record.Domain.Replace(".local", "") == serviceName)
{
rec = record;
worked = true;
}
}
catch { }
}
return(rec);
}
/// <summary>
/// This method handles the actual listening on the socket. Any messages are then
/// sent off to another thread for dispatch.
/// </summary>
private void SocketListener()
{
while (_keepListening)
{
try
{
var tEndpoint = new IPEndPoint(_endpoint.Address, _endpoint.Port);
byte[] msg = _client.Receive(ref tEndpoint);
MdnsQuery query = null;
try
{
query = new MdnsQuery(tEndpoint, msg);
}
catch {}
// If an MDNS query is received, but no one is listening, does it make any sound?
if (query != null && QueryReceived != null)
{
QueryReceived(this, query);
}
}
catch { }
}
_keepListening = true;
}
void Listener_QueryReceived(object sender, MdnsQuery query)
{
foreach (MdnsNet.DNS.QueryQuestion question in query.Questions)
{
string domain = question.Name.Name;
if (ResolverDatabase.ContainsKey(domain.Replace(".local", "")))
{
this.Listener.SendResponse(query.RemoteEndpoint, ResolverDatabase[domain.Replace(".local", "")]);
}
}
}
public List <MdnsRecord> QueryAll(string serviceName, int timeout)
{
byte[] payload = MdnsQuery.Create(serviceName);
var _client = CreateClient();
List <MdnsRecord> records = new List <MdnsRecord>();
bool KeepSearching = true;
var now = DateTime.Now;
var queryThread = new System.Threading.Thread(() =>
{
_client.Send(payload, payload.Length, new IPEndPoint(IPAddress.Parse(MdnsListener.MDNS_IP), MdnsListener.MDNS_PORT));
while (KeepSearching)
{
try
{
var endpoint = new IPEndPoint(IPAddress.Any, MdnsListener.MDNS_PORT);
byte[] recData = _client.Receive(ref endpoint);
var record = new MdnsRecord(recData);
if (record.Domain.Replace(".local", "") == serviceName)
{
records.Add(record);
}
}
catch { }
}
});
queryThread.Start();
while ((DateTime.Now - now).TotalSeconds < timeout)
{
;
}
try
{
queryThread.Abort();
queryThread = null;
}
catch {}
return(new List <MdnsRecord>(records));
}
public async Task <MdnsRecord> QueryAsync(string serviceName)
{
byte[] data = MdnsQuery.Create(serviceName);
var _client = CreateClient();
MdnsRecord rec = null;
await Task.Factory.StartNew(() =>
{
bool worked = false;
_client.Send(data, data.Length, new IPEndPoint(IPAddress.Parse(MdnsListener.MDNS_IP), MdnsListener.MDNS_PORT));
DateTime now = DateTime.Now;
while (!worked)
{
try
{
var endpoint = new IPEndPoint(IPAddress.Any, MdnsListener.MDNS_PORT);
byte[] qData = _client.Receive(ref endpoint);
var record = new MdnsRecord(qData);
if (record.Domain.Replace(".local", "") == serviceName)
{
rec = record;
worked = true;
}
}
catch { }
}
});
if (rec == null)
{
throw new Exception("The timeout period was exceeded while waiting for a response for \"" + serviceName + "\".");
}
return(rec);
}
