public static async Task <QueryResults> QueryAsync(RSAAsymmetricKey key, Target target, TimeSpan timeout)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
if (target == null)
{
throw new ArgumentNullException("target");
}
var tcs = new TaskCompletionSource <QueryResults>();
var connection = new UdpClientConnection(GablarskiProtocol.Instance, key);
connection.Start(MessageTypes.Unreliable);
var cancelSources = new CancellationTokenSource(timeout);
cancelSources.Token.Register(() => {
tcs.TrySetCanceled();
connection.Dispose();
});
connection.ConnectionlessMessageReceived += (sender, args) => {
var results = args.Message as QueryServerResultMessage;
if (results == null)
{
return;
}
tcs.TrySetResult(new QueryResults(results.ServerInfo, results.Channels, results.Users));
connection.Dispose();
};
await connection.SendConnectionlessMessageAsync(new QueryServerMessage(), target).ConfigureAwait(false);
return(await tcs.Task.ConfigureAwait(false));
}