public static void Cmd_ABOR(Object sender, CommandEventArgs e)
{
FtpSession lSession = (FtpSession)e.Session;
if (lSession.State == FtpState.Transfer && lSession.TransferThread != null)
{
lSession.TransferThread.Abort();
lSession.TransferThread = null;
e.Connection.WriteLine("250 ABOR successful");
}
else
{
e.Connection.WriteLine("503 Bad sequence of commands.");
}
}
public static void Cmd_NOOP(Object sender, CommandEventArgs e)
{
e.Connection.WriteLine("200 OK");
}
public static void Cmd_RNFR(Object sender, CommandEventArgs e)
{
FtpSession lSession = (FtpSession)e.Session;
if (lSession.State == FtpState.LoggedIn)
{
if ((e.AllParameters.Length == 0) || (!ValidFilename(e.AllParameters)))
{
e.Connection.WriteLine("501 Syntax error in parameters or arguments.");
return;
}
String lNewDir = e.AllParameters;
if (lNewDir.StartsWith("/"))
{
lNewDir = ValidateDirectory(lNewDir);
}
else
{
String lTemp = lSession.Directory;
if (!lTemp.EndsWith("/"))
lTemp = lTemp + "/";
lNewDir = ValidateDirectory(lTemp + lNewDir);
}
lSession.RenameFrom = lNewDir;
e.Connection.WriteLine("350 Ready for destination name.");
}
else
{
e.Connection.WriteLine("503 Bad sequence of commands.");
}
}
public static void Cmd_USER(Object sender, CommandEventArgs e)
{
FtpSession lSession = (FtpSession)e.Session;
if (lSession.State == FtpState.Start || lSession.State == FtpState.PasswordRequired)
{
if (e.Parameters.Length != 1)
{
e.Connection.WriteLine("501 Syntax error in parameters or arguments.");
}
else
{
lSession.Username = e.Parameters[0];
e.Connection.WriteLine("331 User name okay, need password.");
lSession.State = FtpState.PasswordRequired;
}
}
else
{
e.Connection.WriteLine("503 Bad sequence of commands.");
}
}
public static void Cmd_PASS(Object sender, CommandEventArgs e)
{
FtpSession lSession = (FtpSession)e.Session;
if (lSession.State == FtpState.PasswordRequired)
{
if (e.Parameters.Length != 1)
{
e.Connection.WriteLine("501 Syntax error in parameters or arguments.");
}
else
{
FtpUserLoginEventArgs lEventArgs = new FtpUserLoginEventArgs(e.Session, e.Connection, e.Server);
lEventArgs.UserName = lSession.Username;
lEventArgs.Password = e.Parameters[0];
try
{
((FtpServer)e.Server).InvokeOnUserLogin(lEventArgs);
}
catch (FtpException ex)
{
e.Connection.WriteLine(ex.ToString());
return;
}
catch
{
e.Connection.WriteLine("500 Internal Error");
return;
}
if (lEventArgs.LoginOk)
{
if (lEventArgs.NeedAccount)
{
lSession.State = FtpState.AccountRequired;
e.Connection.WriteLine("332 Need account for login.");
}
else
{
lSession.State = FtpState.LoggedIn;
e.Connection.WriteLine("230 User logged in, proceed.");
}
}
else
{
lSession.State = FtpState.Start;
e.Connection.WriteLine("530 Unable to login");
}
}
}
else
{
e.Connection.WriteLine("503 Bad sequence of commands.");
}
}
public static void Cmd_PASV(Object sender, CommandEventArgs e)
{
FtpSession lSession = (FtpSession)e.Session;
if (lSession.State == FtpState.LoggedIn)
{
if (lSession.ActiveConnection != null)
{
if (lSession.ActiveConnection.Connected)
lSession.ActiveConnection.Close();
lSession.ActiveConnection = null;
}
if (lSession.PassiveServer == null)
{
lSession.PassiveServer = new SimpleServer();
lSession.PassiveServer.Binding.Address = ((IPEndPoint)e.Connection.LocalEndPoint).Address;
lSession.PassiveServer.Open();
}
lSession.Passive = true;
Byte[] lAddress;
#if FULLFRAMEWORK
lAddress = ((IPEndPoint)lSession.PassiveServer.Binding.ListeningSocket.LocalEndPoint).Address.GetAddressBytes();
#endif
#if COMPACTFRAMEWORK
IPAddress lIPAddress = ((IPEndPoint)lSession.PassiveServer.Binding.ListeningSocket.LocalEndPoint).Address;
String[] lIPAddressstr = lIPAddress.ToString().Split(new Char[] {'.'});
lAddress = new Byte[lIPAddressstr.Length];
for (Int32 i = 0; i < lIPAddressstr.Length; i++)
lAddress[i] = Byte.Parse(lIPAddressstr[i]);
#endif
Int32 lPort = ((IPEndPoint)lSession.PassiveServer.Binding.ListeningSocket.LocalEndPoint).Port;
e.Connection.WriteLine("227 Entering Passive Mode ({0},{1},{2},{3},{4},{5}).", lAddress[0], lAddress[1], lAddress[2], lAddress[3],
unchecked((Byte)(lPort >> 8)), unchecked((Byte)lPort));
}
else
{
e.Connection.WriteLine("503 Bad sequence of commands.");
}
}
public static void Cmd_SYST(Object sender, CommandEventArgs e)
{
FtpSession lSession = (FtpSession)e.Session;
if (lSession.State == FtpState.LoggedIn)
e.Connection.WriteLine("215 " + ((FtpServer)e.Server).SystemType);
else
e.Connection.WriteLine("503 Bad sequence of commands.");
}
public static void Cmd_PWD(Object sender, CommandEventArgs e)
{
FtpSession lSession = (FtpSession)e.Session;
if (lSession.State == FtpState.LoggedIn)
{
if (e.Parameters.Length != 0)
e.Connection.WriteLine("501 Syntax error in parameters or arguments.");
else
e.Connection.WriteLine(String.Format("257 \"{0}\" is current directory.", lSession.Directory));
}
else
{
e.Connection.WriteLine("503 Bad sequence of commands.");
}
}
public static void Cmd_CWD(Object sender, CommandEventArgs e)
{
FtpSession lSession = (FtpSession)e.Session;
if (lSession.State == FtpState.LoggedIn)
{
if (e.Parameters.Length == 0)
{
e.Connection.WriteLine("501 Syntax error in parameters or arguments.");
}
else
{
String lNewDir = e.AllParameters;
if (lNewDir.StartsWith("/"))
{
lNewDir = ValidateDirectory(lNewDir);
}
else
{
String lTemp = lSession.Directory;
if (!lTemp.EndsWith("/"))
lTemp = lTemp + "/";
lNewDir = ValidateDirectory(lTemp + lNewDir);
}
FtpChangeDirectoryArgs lArgs = new FtpChangeDirectoryArgs(e.Session, e.Connection, e.Server);
lArgs.NewDirectory = lNewDir;
try
{
((FtpServer)e.Server).InvokeOnChangeDirectory(lArgs);
}
catch (FtpException ex)
{
e.Connection.WriteLine(ex.ToString());
return;
}
catch
{
e.Connection.WriteLine("500 Internal Error");
return;
}
if (lArgs.ChangeDirOk)
{
e.Connection.WriteLine("250 CWD command successful, new folder is '{0}'.", lSession.Directory);
lSession.Directory = lNewDir;
}
else
{
e.Connection.WriteLine("550 Permission Denied.");
}
}
}
else
{
e.Connection.WriteLine("503 Bad sequence of commands.");
}
}
public static void Cmd_PORT(Object sender, CommandEventArgs e)
{
FtpSession lSession = (FtpSession)e.Session;
if (lSession.State == FtpState.LoggedIn)
{
if (e.Parameters.Length != 1)
{
e.Connection.WriteLine("501 Syntax error in parameters or arguments.");
}
else
{
String[] lNewPort = e.Parameters[0].Split(new Char[] { ',' });
if (lNewPort.Length != 6)
{
e.Connection.WriteLine("501 Syntax error in parameters or arguments.");
}
else
{
IPAddress lNewIp;
Int32 lNewPortw;
try
{
lNewIp = IPAddress.Parse(String.Format("{0}.{1}.{2}.{3}", lNewPort[0], lNewPort[1], lNewPort[2], lNewPort[3]));
lNewPortw = Byte.Parse(lNewPort[4]) << 8 | Byte.Parse(lNewPort[5]);
lSession.Passive = false;
try
{
lSession.ActiveConnection = Client.Connect(lNewIp, lNewPortw, new Binding());
e.Connection.WriteLine("200 PORT command succesful");
}
catch
{
e.Connection.WriteLine("500 Illegal PORT command ");
}
}
catch
{
e.Connection.WriteLine("501 Syntax error in parameters or arguments.");
}
}
}
}
else
{
e.Connection.WriteLine("503 Bad sequence of commands.");
}
}
public static void Cmd_QUIT(Object sender, CommandEventArgs e)
{
e.Connection.WriteLine(((FtpServer)e.Server).QuitReply);
e.Connection.Close();
}
public static void Cmd_REST(Object sender, CommandEventArgs e)
{
FtpSession lSession = (FtpSession)e.Session;
if (lSession.State == FtpState.LoggedIn)
{
if (e.Parameters.Length != 1)
{
e.Connection.WriteLine("501 Syntax error in parameters or arguments.");
}
else
{
try
{
Int64 lRestPoint = Int64.Parse(e.Parameters[0]);
lSession.RestartPoint = lRestPoint;
e.Connection.WriteLine(String.Format("350 Restarting at {0}. Send STORE or RETRIEVE to initiate transfer.", lRestPoint));
}
catch
{
e.Connection.WriteLine("501 Syntax error in parameters or arguments.");
}
}
}
else
{
e.Connection.WriteLine("503 Bad sequence of commands.");
}
}
public static void Cmd_TYPE(Object sender, CommandEventArgs e)
{
FtpSession lSession = (FtpSession)e.Session;
if (lSession.State == FtpState.LoggedIn)
{
if (e.Parameters.Length != 1)
{
e.Connection.WriteLine("501 Syntax error in parameters or arguments.");
}
else
{
switch (e.Parameters[0])
{
case "I":
e.Connection.WriteLine("200 Type set to I");
lSession.Image = true;
break;
case "A":
e.Connection.WriteLine("200 Type set to A");
lSession.Image = false;
break;
default:
e.Connection.WriteLine("501 Syntax error in parameters or arguments.");
break;
}
}
}
else
{
e.Connection.WriteLine("503 Bad sequence of commands.");
}
}
public static void Cmd_LIST(Object sender, CommandEventArgs e)
{
FtpSession lSession = (FtpSession)e.Session;
if (lSession.State == FtpState.LoggedIn)
{
if (lSession.Passive)
e.Connection.WriteLine("125 Data connection already open; transfer starting");
if (!ValidateConnection(lSession))
{
e.Connection.WriteLine("425 Unable to build data connection");
}
else
{
FtpGetListingArgs lListingArgs = new FtpGetListingArgs(e.Session, e.Connection, e.Server);
if (!lSession.Passive)
e.Connection.WriteLine("150 Opening data connection");
try
{
((FtpServer)e.Server).InvokeOnGetListing(lListingArgs);
}
catch (FtpException ex)
{
e.Connection.WriteLine(ex.ToString());
return;
}
for (Int32 i = 0; i < lListingArgs.Listing.Count; i++)
{
FtpListingItem lItem = lListingArgs.Listing[i];
lSession.ActiveConnection.WriteLine(lItem.ToString());
}
lSession.ActiveConnection.Close();
lSession.ActiveConnection = null;
try
{
e.Connection.WriteLine("226 Transfer complete.");
}
catch
{
e.Connection.WriteLine("425 Error while transfering");
}
}
lSession.RestartPoint = 0;
}
else
{
e.Connection.WriteLine("503 Bad sequence of commands.");
}
}
public static void Cmd_MKD(Object sender, CommandEventArgs e)
{
FtpSession lSession = (FtpSession)e.Session;
if (lSession.State == FtpState.LoggedIn)
{
if ((e.AllParameters.Length == 0) || (!ValidFilename(e.AllParameters)))
{
e.Connection.WriteLine("501 Syntax error in parameters or arguments.");
return;
}
String lNewDir = e.AllParameters;
if (lNewDir.StartsWith("/"))
{
lNewDir = ValidateDirectory(lNewDir);
}
else
{
String lTemp = lSession.Directory;
if (!lTemp.EndsWith("/"))
lTemp = lTemp + "/";
lNewDir = ValidateDirectory(lTemp + lNewDir);
}
FtpFileEventArgs lEventArgs = new FtpFileEventArgs(e.Session, e.Connection, e.Server);
lEventArgs.FileName = lNewDir;
try
{
((FtpServer)e.Server).InvokeOnMakeDirectory(lEventArgs);
}
catch (FtpException ex)
{
e.Connection.WriteLine(ex.ToString());
return;
}
catch
{
e.Connection.WriteLine("500 Internal Error");
return;
}
if (lEventArgs.Ok)
e.Connection.WriteLine(String.Format("257 \"{0}\" - Directory successfully created", lEventArgs.FileName));
else
e.Connection.WriteLine("550 Permission Denied");
}
else
{
e.Connection.WriteLine("503 Bad sequence of commands.");
}
}
public static void Cmd_CDUP(Object sender, CommandEventArgs e)
{
FtpSession lSession = (FtpSession)e.Session;
if (lSession.State == FtpState.LoggedIn)
{
if (e.Parameters.Length != 0)
{
e.Connection.WriteLine("501 Syntax error in parameters or arguments.");
}
else
{
String lNewDir = lSession.Directory;
if (lNewDir.Length > 2)
{
Int32 lNewLen = lNewDir.LastIndexOf('/', lNewDir.Length - 2);
if (lNewLen <= 0)
lNewLen = 1;
lNewDir = lNewDir.Substring(0, lNewLen);
if (lNewDir.Length == 0)
lNewDir = "/";
}
FtpChangeDirectoryArgs lEventArgs = new FtpChangeDirectoryArgs(e.Session, e.Connection, e.Server);
lEventArgs.NewDirectory = lNewDir;
try
{
((FtpServer)e.Server).InvokeOnChangeDirectory(lEventArgs);
}
catch (FtpException ex)
{
e.Connection.WriteLine(ex.ToString());
return;
}
catch
{
e.Connection.WriteLine("500 Internal Error");
return;
}
if (lEventArgs.ChangeDirOk)
{
e.Connection.WriteLine("250 CDUP command successful.");
lSession.Directory = lNewDir;
}
else
{
e.Connection.WriteLine("550 Permission Denied.");
}
}
}
else
{
e.Connection.WriteLine("503 Bad sequence of commands.");
}
}
public static void Cmd_APPE(Object sender, CommandEventArgs e)
{
FtpSession lSession = (FtpSession)e.Session;
if (lSession.State == FtpState.LoggedIn)
{
if ((e.AllParameters.Length == 0) || (!ValidFilename(e.AllParameters)))
{
e.Connection.WriteLine("501 Syntax error in parameters or arguments.");
return;
}
String lNewDir = e.AllParameters;
if (lNewDir.StartsWith("/"))
{
lNewDir = ValidateDirectory(lNewDir);
}
else
{
String lTemp = lSession.Directory;
if (!lTemp.EndsWith("/"))
lTemp = lTemp + "/";
lNewDir = ValidateDirectory(lTemp + lNewDir);
}
FtpTransferEventArgs lArgs = new FtpTransferEventArgs(e.Session, e.Connection, e.Server);
lArgs.FileName = lNewDir;
lArgs.Append = true;
lArgs.RestartPoint = 0;
lSession.RestartPoint = 0;
try
{
((FtpServer)lArgs.Server).InvokeOnCanStoreFile(lArgs);
}
catch (FtpException ex)
{
lArgs.Connection.WriteLine(ex.ToString());
return;
}
catch
{
lArgs.Connection.WriteLine("500 Internal Error");
return;
}
if (lArgs.Ok)
{
if (lSession.Passive)
e.Connection.WriteLine("125 Data connection already open; transfer starting");
if (!ValidateConnection(lSession))
{
e.Connection.WriteLine("425 Unable to build data connection");
return;
}
if (!lSession.Passive)
e.Connection.WriteLine("150 Opening data connection");
}
else
{
lArgs.Connection.WriteLine("550 Permission Denied");
return;
}
lSession.State = FtpState.Transfer;
if (lSession.TransferThread != null)
{
lSession.TransferThread.Abort();
lSession.TransferThread = null;
}
lSession.TransferThread = new FtpTransferThread(lArgs, true);
}
else
{
e.Connection.WriteLine("503 Bad sequence of commands.");
}
}
protected override void DoWork()
{
CommandBasedServer lServer = (CommandBasedServer)Owner;
CommandBasedSession lSession = lServer.CreateSession();
lSession.RemoteEndPoint = ((IPEndPoint)DataConnection.RemoteEndPoint);
lSession.LocalEndPoint = ((IPEndPoint)DataConnection.RemoteEndPoint);
try
{
lServer.InvokeOnClientConnected(new SessionEventArgs(lSession, DataConnection, lServer));
DataConnection.WriteLine(lServer.Greeting);
CommandEventArgs lArgs = new CommandEventArgs(lSession, DataConnection, lServer);
String lCmdLine;
while (DataConnection.Connected)
{
lCmdLine = DataConnection.ReadLine().Trim();
if (lCmdLine.Length == 0)
continue;
Int32 tempidx = lCmdLine.IndexOf(' ');
if (tempidx == -1)
{
lArgs.Command = lCmdLine.ToUpper();
lArgs.AllParameters = "";
lArgs.Parameters = new String[0];
}
else
{
lArgs.Command = lCmdLine.Substring(0, tempidx).ToUpper();
lArgs.AllParameters = lCmdLine.Substring(tempidx + 1).Trim();
lArgs.Parameters = lArgs.AllParameters.Split(SPACE);
}
OnCommandHandler lCommandHandler;
lServer.Commands.TryGetValue(lArgs.Command, out lCommandHandler);
if (lCommandHandler == null)
{
DataConnection.WriteLine(String.Format(lServer.UnknownCommand, lArgs.Command));
}
else
{
try
{
lCommandHandler(lServer, lArgs);
}
catch (Exception ex)
{
lServer.HandleCommandException(DataConnection, ex);
}
}
}
}
catch (Exception)
{
}
lServer.InvokeOnClientDisconnected(new SessionEventArgs(lSession, DataConnection, lServer));
}
