private DiscoveredTivo HandleDnsAnswer(TivoAhoy.Common.Discovery.Message msg)
{
bool isTivoResponse = false;
foreach (var answer in msg.Answers)
{
if (answer.Type == TivoAhoy.Common.Discovery.Type.PTR)
{
var ptrData = (TivoAhoy.Common.Discovery.Ptr)answer.ResponseData;
var name = ptrData.DomainName.ToString();
if (name.Contains(dnsProtocol))
{
isTivoResponse = true;
}
}
}
if (!isTivoResponse)
{
AddDebugText("Non-TiVo response received: {0}", msg);
return(null);
}
int? port = null;
IPAddress tivoAddress = null;
string tivoName = null;
string tivoTsn = null;
foreach (var additional in msg.Additionals)
{
if (additional.Type == TivoAhoy.Common.Discovery.Type.TXT)
{
var txtData = (TivoAhoy.Common.Discovery.Txt)additional.ResponseData;
foreach (var property in txtData.Properties)
{
AddDebugText("TXT entry: {0} = {1}", property.Key, property.Value);
if (property.Key == "TSN")
{
tivoTsn = property.Value;
}
}
}
if (additional.Type == TivoAhoy.Common.Discovery.Type.A)
{
var hostAddress = (TivoAhoy.Common.Discovery.HostAddress)additional.ResponseData;
tivoAddress = hostAddress.Address;
tivoName = additional.DomainName[0];
}
if (additional.Type == TivoAhoy.Common.Discovery.Type.SRV)
{
var srvData = (TivoAhoy.Common.Discovery.Srv)additional.ResponseData;
port = srvData.Port;
}
}
AddDebugText("TiVo found at {0}:{1}", msg.From.Address, port);
return(new DiscoveredTivo(tivoName, tivoAddress, tivoTsn));
}