public void Process(Byte[] abData)
{
string sMessage = this.Encoding.GetString(abData);
sMessage = sMessage.Substring(0, sMessage.IndexOf('\r'));
FtpServerMessageHandler.SendMessage(Id, sMessage);
string sCommand;
string sValue;
int nSpaceIndex = sMessage.IndexOf(' ');
if (nSpaceIndex < 0)
{
sCommand = sMessage.ToUpper();
sValue = "";
}
else
{
sCommand = sMessage.Substring(0, nSpaceIndex).ToUpper();
sValue = sMessage.Substring(sCommand.Length + 1);
}
// check whether the client has logged in
if (!isLogged)
{
if (!((sCommand == "USER") || (sCommand == "PASS") || (sCommand == "HELP") || (sCommand == "FEAT") || (sCommand == "QUIT")))
{
SocketHelpers.Send(Socket, "530 Not logged in\r\n", this.Encoding);
return;
}
}
// check if data connection will be used
if ((sCommand == "APPE") || (sCommand == "MLSD") || (sCommand == "LIST") || (sCommand == "RETR") || (sCommand == "STOR"))
{
m_useDataSocket = true;
}
var handler = m_theCommandHashTable[sCommand] as FtpCommandHandler;
if (handler == null)
{
FtpServerMessageHandler.SendMessage(Id, string.Format("\"{0}\" : Unknown command", sCommand));
SocketHelpers.Send(Socket, "550 Unknown command\r\n", this.Encoding);
}
else
{
handler.Process(sValue);
}
// reset
m_useDataSocket = false;
}
private void ThreadRun()
{
m_socketListen = SocketHelpers.CreateTcpListener(RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["FTP"].IPEndpoint);
if (m_socketListen != null)
{
m_socketListen.Start();
FtpServerMessageHandler.SendMessage(0, "FTP Server Started");
bool fContinue = true;
while (fContinue)
{
TcpClient socket = null;
try
{
socket = m_socketListen.AcceptTcpClient();
}
catch (SocketException)
{
fContinue = false;
}
finally
{
if (socket == null)
{
fContinue = false;
}
else
{
socket.NoDelay = false;
m_nId++;
FtpServerMessageHandler.SendMessage(m_nId, "New connection");
SendAcceptMessage(socket);
InitialiseSocketHandler(socket);
}
}
}
}
else
{
FtpServerMessageHandler.SendMessage(0, "Error in starting FTP server");
}
}
private static TcpClient OpenSocket(FtpConnectionObject connectionObject)
{
switch (connectionObject.DataConnectionType)
{
case DataConnectionType.Active:
return(SocketHelpers.CreateTcpClient(connectionObject.PortCommandSocketAddress,
connectionObject.PortCommandSocketPort));
case DataConnectionType.Passive:
return(connectionObject.PassiveSocket);
default:
FtpServerMessageHandler.SendMessage(connectionObject.Id, "Invalid connection type!");
return(null);
}
}
private void ThreadRun()
{
var abData = new Byte[m_nBufferSize];
try
{
int nReceived = m_theSocket.GetStream().Read(abData, 0, m_nBufferSize);
while (nReceived > 0)
{
m_theCommands.Process(abData, nReceived);
// the Read method will block
nReceived = m_theSocket.GetStream().Read(abData, 0, m_nBufferSize);
m_lastActiveTime = DateTime.Now;
}
}
catch (SocketException)
{
}
catch (IOException)
{
}
FtpServerMessageHandler.SendMessage(m_nId, "Connection closed");
if (Closed != null)
{
Closed(this);
}
m_theCommands.LogOut();
m_theSocket.Close();
}
public void Process(Byte[] abData)
{
string sMessage = Encoding.ASCII.GetString(abData);
sMessage = sMessage.Substring(0, sMessage.IndexOf('\r'));
FtpServerMessageHandler.SendMessage(Id, sMessage);
string sCommand;
string sValue;
int nSpaceIndex = sMessage.IndexOf(' ');
if (nSpaceIndex < 0)
{
sCommand = sMessage.ToUpper();
sValue = "";
}
else
{
sCommand = sMessage.Substring(0, nSpaceIndex).ToUpper();
sValue = sMessage.Substring(sCommand.Length + 1);
}
var handler = m_theCommandHashTable[sCommand] as FtpCommandHandler;
if (handler == null)
{
FtpServerMessageHandler.SendMessage(Id, string.Format("\"{0}\" : Unknown command", sCommand));
SocketHelpers.Send(Socket, "550 Unknown command\r\n");
}
else
{
handler.Process(sValue);
}
}
private void ThreadMonitor()
{
while (m_theThread.IsAlive)
{
DateTime currentTime = DateTime.Now;
TimeSpan timeSpan = currentTime - m_lastActiveTime;
// has been idle for a long time
if ((timeSpan.TotalSeconds > m_maxIdleSeconds) && !m_theCommands.DataSocketOpen)
{
SocketHelpers.Send(m_theSocket, string.Format("426 No operations for {0}+ seconds. Bye!", m_maxIdleSeconds), m_theCommands.Encoding);
FtpServerMessageHandler.SendMessage(m_nId, "Connection closed for too long idle time.");
if (Closed != null)
{
Closed(this);
}
m_theSocket.Close();
this.Stop();
return;
}
Thread.Sleep(1000 * m_maxIdleSeconds);
}
return; // only monitor the work thread
}
public void Process(byte[] abData)
{
string sMessage = this.Encoding.GetString(abData);
// 2015-11-26 cljung : BUG .IndexOf returns -1 if search item isn't found. Substring throws exception with -1
int pos = sMessage.IndexOf('\r');
if (pos >= 0)
{
sMessage = sMessage.Substring(0, pos);
}
FtpServerMessageHandler.SendMessage(Id, sMessage);
string sCommand;
string sValue;
int nSpaceIndex = sMessage.IndexOf(' ');
if (nSpaceIndex < 0)
{
sCommand = sMessage.ToUpper();
sValue = "";
}
else
{
sCommand = sMessage.Substring(0, nSpaceIndex).ToUpper();
sValue = sMessage.Substring(sCommand.Length + 1);
}
// check whether the client has logged in
if (!isLogged)
{
if (!((sCommand == "USER") || (sCommand == "PASS") || (sCommand == "HELP") || (sCommand == "FEAT") || (sCommand == "QUIT")))
{
SocketHelpers.Send(Socket, "530 Not logged in\r\n", this.Encoding);
return;
}
}
// check if data connection will be used
if ((sCommand == "APPE") || (sCommand == "MLSD") || (sCommand == "LIST") || (sCommand == "RETR") || (sCommand == "STOR"))
{
m_useDataSocket = true;
}
var handler = m_theCommandHashTable[sCommand] as FtpCommandHandler;
if (handler == null)
{
FtpServerMessageHandler.SendMessage(Id, $"\"{sCommand}\" : Unknown command");
FtpServer.LogWrite($"{Socket.Client.RemoteEndPoint.ToString()} Unknown/unsupported command: {sCommand}");
SocketHelpers.Send(Socket, "550 Unknown command\r\n", this.Encoding);
}
else
{
handler.Process(sValue);
}
// reset
m_useDataSocket = false;
}
public void Process(Byte[] abData, int bufferLength)
{
string sMessage = this.Encoding.GetString(abData, 0, bufferLength);
int indexOfCarriageReturn = sMessage.IndexOf('\r');
if (indexOfCarriageReturn == -1)
{
// the full message line has not yet been sent, append the current buffer and return
// so that the rest of the message can be read
currentMessage.Append(sMessage);
return;
}
else
{
// current payload contains carriage return, read up to that point and
// append to the current message
sMessage = sMessage.Substring(0, indexOfCarriageReturn);
currentMessage.Append(sMessage);
// don't return; time to process the message
}
sMessage = currentMessage.ToString();
currentMessage = new StringBuilder();
FtpServerMessageHandler.SendMessage(Id, sMessage);
string sCommand;
string sValue;
int nSpaceIndex = sMessage.IndexOf(' ');
if (nSpaceIndex < 0)
{
sCommand = sMessage.ToUpper();
sValue = "";
}
else
{
sCommand = sMessage.Substring(0, nSpaceIndex).ToUpper();
sValue = sMessage.Substring(sCommand.Length + 1);
}
// check whether the client has logged in
if (!isLogged)
{
if (!((sCommand == "USER") || (sCommand == "PASS") || (sCommand == "HELP") || (sCommand == "FEAT") || (sCommand == "QUIT")))
{
SocketHelpers.Send(Socket, "530 Not logged in\r\n", this.Encoding);
return;
}
}
// check if data connection will be used
if ((sCommand == "APPE") || (sCommand == "MLSD") || (sCommand == "LIST") || (sCommand == "RETR") || (sCommand == "STOR"))
{
m_useDataSocket = true;
}
var handler = m_theCommandHashTable[sCommand] as FtpCommandHandler;
if (handler == null)
{
FtpServerMessageHandler.SendMessage(Id, string.Format("\"{0}\" : Unknown command", sCommand));
SocketHelpers.Send(Socket, "550 Unknown command\r\n", this.Encoding);
}
else
{
handler.Process(sValue);
}
// reset
m_useDataSocket = false;
}
/// The main thread of the ftp server
/// Listen and acception clients, create handler threads for each client
private void ThreadRun()
{
try
{
FtpServerMessageHandler.Message += TraceMessage;
// listen at the port by the "FTP" endpoint setting
IPEndPoint ipEndPoint;
ipEndPoint = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["FTP2Azure.Command"].IPEndpoint;
m_socketListen = SocketHelpers.CreateTcpListener(ipEndPoint);
if (m_socketListen != null)
{
Trace.TraceInformation("FTP Server listened at: " + ipEndPoint);
m_socketListen.Start();
Trace.TraceInformation("FTP Server Started");
bool fContinue = true;
while (fContinue)
{
TcpClient socket = null;
try
{
socket = m_socketListen.AcceptTcpClient();
}
catch (SocketException e)
{
fContinue = false;
if (errorHandler != null)
{
errorHandler(e);
}
}
finally
{
if (socket == null)
{
fContinue = false;
}
else if (m_apConnections.Count >= m_maxClients)
{
Trace.WriteLine("Too many clients, won't handle this connection", "Warnning");
SendRejectMessage(socket);
socket.Close();
}
else
{
socket.NoDelay = false;
m_nId++;
FtpServerMessageHandler.SendMessage(m_nId, "New connection");
SendAcceptMessage(socket);
InitialiseSocketHandler(socket);
}
}
}
}
else
{
FtpServerMessageHandler.SendMessage(0, "Error in starting FTP server");
}
}
catch (Exception e)
{
if (errorHandler != null)
{
errorHandler(e);
}
}
}
/// <summary>
/// The main thread of the ftp server
/// Listen and acception clients, create handler threads for each client
/// </summary>
private void ThreadRun()
{
FtpServerMessageHandler.Message += TraceMessage;
// listen at the port by the "FTP" endpoint setting
int port = int.Parse(ConfigurationManager.AppSettings["FTP"]);
System.Net.IPAddress ipaddr = SocketHelpers.GetLocalAddress();
System.Net.IPEndPoint ipEndPoint = new System.Net.IPEndPoint(ipaddr.Address, port);
FtpServer.m_ftpIpAddr = ipaddr.ToString();
m_socketListen = SocketHelpers.CreateTcpListener(ipEndPoint);
if (m_socketListen != null)
{
string msg = string.Format("FTP Server started.Listening to: {0}", ipEndPoint);
FtpServer.LogWrite(msg);
Trace.TraceInformation(msg);
m_socketListen.Start();
bool fContinue = true;
while (fContinue)
{
TcpClient socket = null;
try
{
socket = m_socketListen.AcceptTcpClient();
}
catch (SocketException)
{
fContinue = false;
}
finally
{
if (socket == null)
{
fContinue = false;
}
else if (m_apConnections.Count >= m_maxClients)
{
Trace.WriteLine("Too many clients, won't handle this connection", "Warnning");
SendRejectMessage(socket);
socket.Close();
}
else
{
socket.NoDelay = false;
m_nId++;
FtpServerMessageHandler.SendMessage(m_nId, "New connection");
SendAcceptMessage(socket);
// 2015-11-25 cljung : under stress testing, this happens. Don't know why yet, but let's keep it from crashing
try
{
InitialiseSocketHandler(socket);
}
catch (System.ObjectDisposedException ode)
{
Trace.TraceError(string.Format("ObjectDisposedException initializing client socket:\r\n{0}", ode));
m_nId--;
// can't fail
try {
socket.Close();
} catch { }
}
}
}
}
}
else
{
FtpServerMessageHandler.SendMessage(0, "Error in starting FTP server");
}
}
/// The main thread of the ftp server
/// Listen and acception clients, create handler threads for each client
private void ThreadRun()
{
try
{
FtpServerMessageHandler.Message += TraceMessage;
// listen at the port by the "FTP" endpoint setting
IPEndPoint ipEndPoint;
ipEndPoint = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["FTP2Azure.Command"].IPEndpoint;
m_socketListen = SocketHelpers.CreateTcpListener(ipEndPoint);
if (m_socketListen != null)
{
Trace.TraceInformation($"FTP Server listened at: {ipEndPoint}");
m_socketListen.Start();
Trace.TraceInformation("FTP Server Started");
bool fContinue = true;
while (fContinue)
{
TcpClient socket = null;
try
{
socket = m_socketListen.AcceptTcpClient();
}
catch (SocketException e)
{
fContinue = false;
ErrorHandler?.Invoke(e);
}
finally
{
if (socket == null)
{
fContinue = false;
}
else if (m_apConnections.Count >= m_maxClients)
{
Trace.WriteLine("Too many clients, won't handle this connection", "Warnning");
SendRejectMessage(socket);
socket.Close();
}
else
{
socket.NoDelay = false;
m_nId++;
FtpServerMessageHandler.SendMessage(m_nId, "New connection");
SendAcceptMessage(socket);
//under stress testing, this happens. Don't know why yet, but let's keep it from crashing
try
{
InitialiseSocketHandler(socket);
}
catch (ObjectDisposedException ode)
{
Trace.TraceError($"ObjectDisposedException initializing client socket:\r\n{ode}");
m_nId--;
socket.Close();
}
}
}
}
}
else
{
FtpServerMessageHandler.SendMessage(0, "Error in starting FTP server");
}
}
catch (Exception e)
{
ErrorHandler?.Invoke(e);
}
}