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// This code is derived from jcifs smb client library <jcifs at samba dot org>
// Ported by J. Arturo <webmaster at komodosoft dot net>
//
// 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
using System;
using System.IO;
using SharpCifs.Util.Sharpen;
namespace SharpCifs.Smb
{
internal class TransactNamedPipeInputStream : SmbFileInputStream
{
private const int InitPipeSize = 4096;
private byte[] _pipeBuf = new byte[InitPipeSize];
private int _begIdx;
private int _nxtIdx;
private int _used;
private bool _dcePipe;
internal object Lock;
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
/// <exception cref="System.UriFormatException"></exception>
/// <exception cref="UnknownHostException"></exception>
internal TransactNamedPipeInputStream(SmbNamedPipe pipe) : base(pipe, (pipe.PipeType
& unchecked((int)(0xFFFF00FF))) | SmbFile.OExcl)
{
_dcePipe = (pipe.PipeType & SmbNamedPipe.PipeTypeDceTransact) != SmbNamedPipe
.PipeTypeDceTransact;
Lock = new object();
}
/// <exception cref="System.IO.IOException"></exception>
public override int Read()
{
int result = -1;
lock (Lock)
{
try
{
while (_used == 0)
{
Runtime.Wait(Lock);
}
}
catch (Exception ie)
{
throw new IOException(ie.Message);
}
result = _pipeBuf[_begIdx] & unchecked(0xFF);
_begIdx = (_begIdx + 1) % _pipeBuf.Length;
}
return result;
}
/// <exception cref="System.IO.IOException"></exception>
public override int Read(byte[] b)
{
return Read(b, 0, b.Length);
}
/// <exception cref="System.IO.IOException"></exception>
public override int Read(byte[] b, int off, int len)
{
int result = -1;
int i;
if (len <= 0)
{
return 0;
}
lock (Lock)
{
try
{
while (_used == 0)
{
Runtime.Wait(Lock);
}
}
catch (Exception ie)
{
throw new IOException(ie.Message);
}
i = _pipeBuf.Length - _begIdx;
result = len > _used ? _used : len;
if (_used > i && result > i)
{
Array.Copy(_pipeBuf, _begIdx, b, off, i);
off += i;
Array.Copy(_pipeBuf, 0, b, off, result - i);
}
else
{
Array.Copy(_pipeBuf, _begIdx, b, off, result);
}
_used -= result;
_begIdx = (_begIdx + result) % _pipeBuf.Length;
}
return result;
}
/// <exception cref="System.IO.IOException"></exception>
public override int Available()
{
if (File.Log.Level >= 3)
{
File.Log.WriteLine("Named Pipe available() does not apply to TRANSACT Named Pipes"
);
}
return 0;
}
internal virtual int Receive(byte[] b, int off, int len)
{
int i;
if (len > (_pipeBuf.Length - _used))
{
byte[] tmp;
int newSize;
newSize = _pipeBuf.Length * 2;
if (len > (newSize - _used))
{
newSize = len + _used;
}
tmp = _pipeBuf;
_pipeBuf = new byte[newSize];
i = tmp.Length - _begIdx;
if (_used > i)
{
Array.Copy(tmp, _begIdx, _pipeBuf, 0, i);
Array.Copy(tmp, 0, _pipeBuf, i, _used - i);
}
else
{
Array.Copy(tmp, _begIdx, _pipeBuf, 0, _used);
}
_begIdx = 0;
_nxtIdx = _used;
tmp = null;
}
i = _pipeBuf.Length - _nxtIdx;
if (len > i)
{
Array.Copy(b, off, _pipeBuf, _nxtIdx, i);
off += i;
Array.Copy(b, off, _pipeBuf, 0, len - i);
}
else
{
Array.Copy(b, off, _pipeBuf, _nxtIdx, len);
}
_nxtIdx = (_nxtIdx + len) % _pipeBuf.Length;
_used += len;
return len;
}
/// <exception cref="System.IO.IOException"></exception>
public virtual int Dce_read(byte[] b, int off, int len)
{
return base.Read(b, off, len);
}
}
}
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