public void HandleClient(object obj)
{
_remoteEndPoint = (IPEndPoint)_controlClient.Client.RemoteEndPoint;
_clientIp = _remoteEndPoint.Address.ToString();
_controlStream = _controlClient.GetStream();
_controlReader = new StreamReader(_controlStream);
_controlWriter = new StreamWriter(_controlStream);
_controlWriter.WriteLine("220 Service Ready.");
_controlWriter.Flush();
_validCommands.AddRange(new[] { "AUTH", "USER", "PASS", "QUIT", "HELP", "NOOP" });
_dataClient = new TcpClient();
string renameFrom = null;
try
{
string line;
while ((line = _controlReader.ReadLine()) != null)
{
string response = null;
var command = line.Split(' ');
var cmd = command[0].ToUpperInvariant();
var arguments = command.Length > 1 ? line.Substring(command[0].Length + 1) : null;
if (arguments != null && arguments.Trim().Length == 0)
{
arguments = null;
}
var logEntry = new LogEntry
{
Date = DateTime.Now,
Cip = _clientIp,
CsUriStem = arguments
};
if (!_validCommands.Contains(cmd))
{
response = CheckUser();
}
if (cmd != "RNTO")
{
renameFrom = null;
}
if (response == null)
{
switch (cmd)
{
case "USER":
response = User(arguments);
break;
case "PASS":
response = Password(arguments);
logEntry.CsUriStem = "******";
break;
case "CWD":
response = ChangeWorkingDirectory(arguments);
break;
case "CDUP":
response = ChangeWorkingDirectory("..");
break;
case "QUIT":
response = "221 Service closing control connection";
break;
case "REIN":
_currentUser = null;
_username = null;
_passiveListener = null;
_dataClient = null;
response = "220 Service ready for new user";
break;
case "PORT":
response = Port(arguments);
logEntry.CPort = _dataEndpoint.Port.ToString(CultureInfo.InvariantCulture);
break;
case "PASV":
response = Passive();
logEntry.SPort = ((IPEndPoint)_passiveListener.LocalEndpoint).Port.ToString(CultureInfo.InvariantCulture);
break;
case "TYPE":
response = Type(command[1], command.Length == 3 ? command[2] : null);
logEntry.CsUriStem = command[1];
break;
case "STRU":
response = Structure(arguments);
break;
case "MODE":
response = Mode(arguments);
break;
case "RNFR":
renameFrom = arguments;
response = "350 Requested file action pending further information";
break;
case "RNTO":
response = Rename(renameFrom, arguments);
break;
case "DELE":
response = Delete(arguments);
break;
case "RMD":
response = RemoveDir(arguments);
break;
case "MKD":
response = CreateDir(arguments);
break;
case "PWD":
response = PrintWorkingDirectory();
break;
case "RETR":
response = Retrieve(arguments);
logEntry.Date = DateTime.Now;
break;
case "STOR":
response = Store(arguments);
logEntry.Date = DateTime.Now;
break;
case "STOU":
response = StoreUnique();
logEntry.Date = DateTime.Now;
break;
case "APPE":
response = Append(arguments);
logEntry.Date = DateTime.Now;
break;
case "LIST":
response = List(arguments ?? _currentDirectory);
logEntry.Date = DateTime.Now;
break;
case "SYST":
response = "215 UNIX Type: L8";
break;
case "NOOP":
response = "200 OK";
break;
case "ACCT":
response = "200 OK";
break;
case "ALLO":
response = "200 OK";
break;
case "NLST":
response = "502 Command not implemented";
break;
case "SITE":
response = "502 Command not implemented";
break;
case "STAT":
response = "502 Command not implemented";
break;
case "HELP":
response = "502 Command not implemented";
break;
case "SMNT":
response = "502 Command not implemented";
break;
case "REST":
response = "502 Command not implemented";
break;
case "ABOR":
response = "502 Command not implemented";
break;
// Extensions defined by rfc 2228
case "AUTH":
response = Auth(arguments);
break;
// Extensions defined by rfc 2389
case "FEAT":
response = FeatureList();
break;
case "OPTS":
response = Options(arguments);
break;
// Extensions defined by rfc 3659
case "MDTM":
response = FileModificationTime(arguments);
break;
case "SIZE":
response = FileSize(arguments);
break;
// Extensions defined by rfc 2428
case "EPRT":
response = EPort(arguments);
logEntry.CPort = _dataEndpoint.Port.ToString(CultureInfo.InvariantCulture);
break;
case "EPSV":
response = EPassive();
logEntry.SPort = ((IPEndPoint)_passiveListener.LocalEndpoint).Port.ToString();
break;
default:
response = "502 Command not implemented";
break;
}
}
logEntry.CsMethod = cmd;
logEntry.CsUsername = _username;
logEntry.ScStatus = response.Substring(0, response.IndexOf(' '));
_log.Info(logEntry);
if (_controlClient == null || !_controlClient.Connected)
{
break;
}
_controlWriter.WriteLine(response);
_controlWriter.Flush();
if (response.StartsWith("221"))
{
break;
}
if (cmd != "AUTH") continue;
_cert = new X509Certificate("server.cer");
_sslStream = new SslStream(_controlStream);
_sslStream.AuthenticateAsServer(_cert);
_controlReader = new StreamReader(_sslStream);
_controlWriter = new StreamWriter(_sslStream);
}
}
catch (Exception ex)
{
_log.Error(ex.Message);
}
Dispose();
}
private string Password(string password)
{
_currentUser = UserStore.Validate(_username, password);
if (_currentUser == null) return "530 Not logged in";
_root = _currentUser.HomeDir;
_currentDirectory = _root;
return "230 User logged in";
}