/// <summary>
/// Connect the client to the server.
/// </summary>
/// <param name="sender">The current server to client connection channel.</param>
/// <param name="data">The data from the client.</param>
/// <param name="command">The command sent.</param>
private void Connect(Pop3SslProxyConnection sender, string data, string command)
{
try
{
// Add custom validation here.
// Get the current data.
string dataArray = data.Trim();
// Is the command user.
if (command.Equals("USER"))
{
sender.ConnectionName = dataArray;
}
// Is the command pass then connected
if (command.Equals("PASS"))
{
sender.Connected = true;
}
// Send the command to the pop3 server.
sender.SendSocketCommand(command + " " + dataArray);
}
catch (Exception e)
{
// Detect a thread abort exception.
if (e is ThreadAbortException)
{
Thread.ResetAbort();
}
base.Write("Pop3SslProxyServer", "Connect", e.Message,
382, WriteTo.EventLog, LogType.Error);
// Reply to client internal server error command.
ReplyToSender(sender, "500 Error");
}
}
/// <summary>
/// Processes all in-comming client command requests.
/// </summary>
/// <param name="sender">The current server to client connection channel.</param>
/// <param name="dataReceived">The data received from the client.</param>
private void client_OnDataReceived(Pop3SslProxyConnection sender, string dataReceived)
{
try
{
// Decrypt the data recived from the client.
string receivedData = dataReceived.Trim();
string command = string.Empty;
string data = string.Empty;
// Get the command from the client and
// any data the client has sent.
if (receivedData.Length < 4)
{
command = receivedData.Substring(0, 3).Trim();
}
else if (receivedData.Length < 5)
{
command = receivedData.Substring(0, 4).Trim();
}
else
{
command = receivedData.Substring(0, 4).Trim();
data = receivedData.Substring(4).Trim();
}
// Delay.
System.Threading.Thread.Sleep(10);
// Process the command.
switch (command.ToUpper())
{
case "QUIT":
// Close the client connection.
Disconnect(sender);
break;
case "USER":
// User name.
Connect(sender, data, command);
break;
case "PASS":
// User password.
Connect(sender, data, command);
break;
case "ENDC":
// End the client connection.
EndConnection(sender);
break;
default:
// An unknown command sent.
//Unknown(sender);
sender.SendSocketCommand(receivedData);
break;
}
}
catch (Exception e)
{
// Detect a thread abort exception.
if (e is ThreadAbortException)
{
Thread.ResetAbort();
}
base.Write("Pop3SslProxyServer", "OnDataReceived", e.Message,
292, WriteTo.EventLog, LogType.Error);
// Reply to client internal server error command.
ReplyToSender(sender, "500 Error");
}
}