private Socket InitDataConnection()
#endif
{
FtpStatus status;
if (usePassive)
{
status = SendCommand(PassiveCommand);
if (status.StatusCode != FtpStatusCode.EnteringPassive)
{
throw CreateExceptionFromResponse(status);
}
return(SetupPassiveConnection(status.StatusDescription));
}
// Open a socket to listen the server's connection
#if SSHARP
CrestronListenerSocket sock = new CrestronListenerSocket(IPAddress.Any, 0);
#else
Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
#endif
try
{
sock.Bind(new IPEndPoint(localEndPoint.Address, 0));
sock.Listen(1); // We only expect a connection from server
}
catch (SocketException e)
{
sock.Close();
throw new WebException("Couldn't open listening socket on client", e);
}
IPEndPoint ep = (IPEndPoint)sock.LocalEndPoint;
string ipString = ep.Address.ToString().Replace('.', ',');
int h1 = ep.Port >> 8; // ep.Port / 256
int h2 = ep.Port % 256;
string portParam = ipString + "," + h1 + "," + h2;
status = SendCommand(PortCommand, portParam);
if (status.StatusCode != FtpStatusCode.CommandOK)
{
sock.Close();
throw (CreateExceptionFromResponse(status));
}
return(sock);
}
private void OpenControlConnection()
{
Exception exception = null;
#if SSHARP
CrestronClientSocket sock = null;
#else
Socket sock = null;
#endif
foreach (IPAddress address in hostEntry.AddressList)
{
#if SSHARP
#if !IPV6
if (address.AddressFamily == AddressFamily.InterNetworkV6)
{
continue;
}
#endif
sock = new CrestronClientSocket();
#else
sock = new Socket(address.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
#endif
IPEndPoint remote = new IPEndPoint(address, requestUri.Port);
if (!ServicePoint.CallEndPointDelegate(sock, remote))
{
sock.Close();
sock = null;
}
else
{
try
{
sock.Connect(remote);
localEndPoint = (IPEndPoint)sock.LocalEndPoint;
break;
}
catch (SocketException exc)
{
exception = exc;
sock.Close();
sock = null;
}
}
}
// Couldn't connect to any address
if (sock == null)
{
throw new WebException("Unable to connect to remote server", exception, WebExceptionStatus.UnknownError, ftpResponse);
}
controlStream = new NetworkStream(sock);
controlReader = new StreamReader(controlStream, Encoding.ASCII);
State = RequestState.Authenticating;
Authenticate();
FtpStatus status = SendCommand("OPTS", "utf8", "on");
// ignore status for OPTS
status = SendCommand(WebRequestMethods.Ftp.PrintWorkingDirectory);
initial_path = GetInitialPath(status);
}
private void OpenDataConnection()
{
FtpStatus status;
#if SSHARP
object s = InitDataConnection();
#else
Socket s = InitDataConnection();
#endif
// Handle content offset
if (offset > 0)
{
status = SendCommand(RestCommand, offset.ToString());
if (status.StatusCode != FtpStatusCode.FileCommandPending)
{
throw CreateExceptionFromResponse(status);
}
}
if (method != WebRequestMethods.Ftp.ListDirectory && method != WebRequestMethods.Ftp.ListDirectoryDetails &&
method != WebRequestMethods.Ftp.UploadFileWithUniqueName)
{
status = SendCommand(method, file_name);
}
else
{
status = SendCommand(method);
}
if (status.StatusCode != FtpStatusCode.OpeningData && status.StatusCode != FtpStatusCode.DataAlreadyOpen)
{
throw CreateExceptionFromResponse(status);
}
if (usePassive)
{
#if SSHARP
origDataStream = new NetworkStream((CrestronClientSocket)s, true);
#else
origDataStream = new NetworkStream(s, true);
#endif
dataStream = origDataStream;
if (EnableSsl)
{
ChangeToSSLSocket(ref dataStream);
}
}
else
{
// Active connection (use Socket.Blocking to true)
#if SSHARP
CrestronServerSocket incoming = null;
try
{
incoming = ((CrestronListenerSocket)s).Accept();
}
#else
Socket incoming = null;
try
{
incoming = s.Accept();
}
#endif
catch (SocketException)
{
#if SSHARP
((CrestronListenerSocket)s).Close();
#else
s.Close();
#endif
if (incoming != null)
{
incoming.Close();
}
throw new ProtocolViolationException("Server commited a protocol violation.");
}
#if SSHARP
((CrestronListenerSocket)s).Close();
#else
s.Close();
#endif
origDataStream = new NetworkStream(incoming, true);
dataStream = origDataStream;
if (EnableSsl)
{
ChangeToSSLSocket(ref dataStream);
}
}
ftpResponse.UpdateStatus(status);
}
// Probably we could do better having here a regex
private Socket SetupPassiveConnection(string statusDescription)
{
// Current response string
string response = statusDescription;
if (response.Length < 4)
{
throw new WebException("Cannot open passive data connection");
}
// Look for first digit after code
int i;
for (i = 3; i < response.Length && !Char.IsDigit(response[i]); i++)
{
;
}
if (i >= response.Length)
{
throw new WebException("Cannot open passive data connection");
}
// Get six elements
string[] digits = response.Substring(i).Split(new char[] { ',' }, 6);
if (digits.Length != 6)
{
throw new WebException("Cannot open passive data connection");
}
// Clean non-digits at the end of last element
int j;
for (j = digits[5].Length - 1; j >= 0 && !Char.IsDigit(digits[5][j]); j--)
{
;
}
if (j < 0)
{
throw new WebException("Cannot open passive data connection");
}
digits[5] = digits[5].Substring(0, j + 1);
IPAddress ip;
try
{
ip = IPAddress.Parse(String.Join(".", digits, 0, 4));
}
catch (FormatException)
{
throw new WebException("Cannot open passive data connection");
}
// Get the port
int p1, p2, port;
#if SSHARP
if (!TryParsers.Int32TryParse(digits[4], out p1) || !TryParsers.Int32TryParse(digits[5], out p2))
#else
if (!Int32.TryParse(digits[4], out p1) || !Int32.TryParse(digits[5], out p2))
#endif
{ throw new WebException("Cannot open passive data connection"); }
port = (p1 << 8) + p2; // p1 * 256 + p2
//port = p1 * 256 + p2;
if (port < IPEndPoint.MinPort || port > IPEndPoint.MaxPort)
{
throw new WebException("Cannot open passive data connection");
}
IPEndPoint ep = new IPEndPoint(ip, port);
#if SSHARP
CrestronClientSocket sock = new CrestronClientSocket();
#else
Socket sock = new Socket(ep.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
#endif
try
{
sock.Connect(ep);
}
catch (SocketException)
{
sock.Close();
throw new WebException("Cannot open passive data connection");
}
return(sock);
}