protected override Response SendRequest(Request request)
{
// RFC1035 max. size of a UDP datagram is 512 bytes
byte[] responseMessage = new byte[512];
for (int intAttempts = 0; intAttempts < Options.RetryCount; intAttempts++)
{
using (var datagramSocket = m_datagramSocketFactory.CreateDatagramSocket(Options.Timeout))
{
try
{
var address = IPAddress.Parse(DnsServerEndpoint.Address.ToString());
var endpoint = new IPEndpoint(address, (ushort)DnsServerEndpoint.Port);
datagramSocket.SendTo(request.Data, endpoint);
int intReceived = datagramSocket.Receive(responseMessage);
byte[] data = new byte[intReceived];
Array.Copy(responseMessage, data, intReceived);
Response response = new Response(DnsServerEndpoint, data);
CacheResponse(response);
return(response);
}
catch (Exception /*SocketException*/)
{
continue;
}
finally
{
IncrementSequenceNumber();
}
}
}
Response responseTimeout = new Response();
responseTimeout.Error = "Timeout Error";
return(responseTimeout);
}
