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// Copyright (c) 2004-2007 MySQL AB
//
// MySQL Connector/NET is licensed under the terms of the GPLv2
// <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
// MySQL Connectors. There are special exceptions to the terms and
// conditions of the GPLv2 as it is applied to this software, see the
// FLOSS License Exception
// <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published
// by the Free Software Foundation; version 2 of the License.
//
// This program 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 General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Collections;
namespace MySql.Data.Common
{
/// <summary>
/// Summary description for MySqlSocket.
/// </summary>
internal sealed class SocketStream : Stream
{
private Socket socket;
public SocketStream(AddressFamily addressFamily, SocketType socketType, ProtocolType protocol)
{
socket = new Socket(addressFamily, socketType, protocol);
}
#region Properties
public Socket Socket
{
get { return socket; }
}
public override bool CanRead
{
get { return true; }
}
public override bool CanSeek
{
get { return false; }
}
public override bool CanWrite
{
get { return true; }
}
public override long Length
{
get { return 0; }
}
public override long Position
{
get { return 0; }
set { throw new NotSupportedException("SocketStream does not support seek"); }
}
#endregion
#region Stream Implementation
public override void Flush()
{
}
public override int Read(byte[] buffer, int offset, int count)
{
return socket.Receive(buffer, offset, count, SocketFlags.None);
}
public override long Seek(long offset, SeekOrigin origin)
{
throw new NotSupportedException("SocketStream does not support seek");
}
public override void SetLength(long value)
{
}
public override void Write(byte[] buffer, int offset, int count)
{
socket.Send(buffer, offset, count, SocketFlags.None);
}
#endregion
public bool Connect(EndPoint remoteEP, int timeout)
{
// set the socket to non blocking
socket.Blocking = false;
// then we star the connect
SocketAddress addr = remoteEP.Serialize();
byte[] buff = new byte[addr.Size];
for (int i=0; i<addr.Size; i++)
buff[i] = addr[i];
NativeMethods.connect(socket.Handle, buff, addr.Size);
int wsaerror = NativeMethods.WSAGetLastError();
if (wsaerror != 10035)
{
// this is probably an IPV6 address
if (wsaerror == 10047)
return false;
throw new SocketException(wsaerror);
}
// next we wait for our connect timeout or until the socket is connected
ArrayList write = new ArrayList();
write.Add(socket);
ArrayList error = new ArrayList();
error.Add(socket);
Socket.Select(null, write, error, timeout*1000*1000);
if (write.Count == 0) return false;
// set socket back to blocking mode
socket.Blocking = true;
return true;
}
}
}
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