void Listener()
{
// create the buffer and start listening
var buffer = new byte[0x10000];
while (true)
{
// receive the next message
var endpoint = (EndPoint) new IPEndPoint(IPAddress.Any, 0);
var length = socket.ReceiveFrom(buffer, ref endpoint);
// if nothing is received, continue listening
if (length == 0)
{
continue;
}
// parse the packet and retrieve all necessary attributes
var request = new Request();
request.Client = (IPEndPoint)endpoint;
try
{
var packet = new RadiusPacket(buffer, length);
if (packet.Code != PacketCode.AccessRequest)
{
continue;
}
request.Identifier = packet.Identifier;
request.Authenticator = packet.Authenticator;
if (packet.Attribute(RadiusAttribute.CHAPPassword).Count > 0)
{
throw new FormatException("CHAP-Password is not supported");
}
var userNames = packet.Attribute(RadiusAttribute.UserName);
if (userNames.Count != 1)
{
throw new FormatException("User-Name is not present");
}
request.UserName = userNames[0];
if (packet.Attribute(RadiusAttribute.UserPassword).Count != 1)
{
throw new FormatException("User-Password is not present");
}
request.Password = packet.GetUserPassword(sharedSecred);
var callerIds = packet.Attribute(RadiusAttribute.CallingStationId);
request.Address = callerIds.Count > 0 ? callerIds[0] : null;
request.ProxyStates = packet.Attribute(RadiusAttribute.ProxyState).ToArray();
}
#if DEBUG
catch (FormatException e)
{
ServiceApplication.LogEvent(EventLogEntryType.Information, e.Message);
continue;
}
#else
catch (FormatException) { continue; }
#endif
// enqueue the request
ThreadPool.QueueUserWorkItem(HandleRequest, request);
}
}