// edtFTPnet
//
// Copyright (C) 2004 Enterprise Distributed Technologies Ltd
//
// www.enterprisedt.com
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Bug fixes, suggestions and comments should posted on
// http://www.enterprisedt.com/forums/index.php
//
// Change Log:
//
// $Log: FTPActiveDataSocket.cs,v $
// Revision 1.13 2009-03-29 23:54:01 bruceb
// add Poll() and Available
//
// Revision 1.12 2008-03-12 04:04:19 bruceb
// try/catch around acceptedSock closure
//
// Revision 1.11 2006/11/17 15:38:42 bruceb
// rename Logger to string
//
// Revision 1.10 2006/05/27 10:22:28 bruceb
// more debug
//
// Revision 1.9 2006/04/13 04:32:40 bruceb
// timeout for Accept
//
// Revision 1.8 2004/11/13 19:04:20 bruceb
// GetStream removed arg
//
// Revision 1.7 2004/11/05 20:00:29 bruceb
// cleaned up namespaces
//
// Revision 1.6 2004/11/04 22:32:26 bruceb
// made many protected methods internal
//
// Revision 1.5 2004/11/04 21:18:10 hans
// *** empty log message ***
//
// Revision 1.4 2004/10/29 14:30:31 bruceb
// BaseSocket changes
//
//
using System.IO;
using System.Net.Sockets;
using EnterpriseDT.Net;
using LoggerEnterpriseDT.Util.Debug.Logger;
namespace EnterpriseDT.Net.Ftp{
/// <summary>
/// Active data socket handling class
/// </summary>
/// <author>
/// Bruce Blackshaw
/// </author>
/// <version>
/// $Revision: 1.13 $
/// </version>
public class FTPActiveDataSocket : FTPDataSocket
{
/// <summary> Logging object</summary>
private Logger log;
/// <summary>
/// Set the TCP timeout on the underlying data socket(s).
/// </summary>
internal override int Timeout
{
set
{
timeout = value;
SetSocketTimeout(sock, value);
if (acceptedSock != null)
SetSocketTimeout(acceptedSock, value);
}
}
/// <summary>
/// Accepts the FTP server's connection and returns the socket's stream.
/// </summary>
internal override Stream DataStream
{
get
{
// accept socket from server
AcceptConnection();
return acceptedSock.GetStream();
}
}
/// <summary>
/// The socket accepted from server
/// </summary>
internal BaseSocket acceptedSock = null;
/// <summary>
/// Constructor
/// </summary>
/// <param name="sock"> the server socket to use
/// </param>
internal FTPActiveDataSocket(BaseSocket sock)
{
this.sock = sock;
log = Logger.GetLogger("FTPActiveDataSocket");
}
/// <summary>
/// Waits for a connection from the server and then sets the timeout
/// when the connection is made.
/// </summary>
internal virtual void AcceptConnection()
{
if (acceptedSock == null)
{
acceptedSock = sock.Accept(timeout);
SetSocketTimeout(acceptedSock, timeout);
log.Debug("AcceptConnection() succeeded");
}
}
internal override bool Poll(int microseconds, SelectMode mode)
{
if (acceptedSock != null)
{
return acceptedSock.Poll(microseconds, mode);
}
throw new IOException("Not accepted yet");
}
internal override int Available
{
get
{
if (acceptedSock != null)
{
return acceptedSock.Available;
}
throw new IOException("Not accepted yet");
}
}
/// <summary>
/// Closes underlying sockets
/// </summary>
internal override void Close()
{
try
{
if (acceptedSock != null)
{
acceptedSock.Close();
acceptedSock = null;
}
}
finally
{
sock.Close();
}
}
}
}
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