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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 SharpCifs.Util;
using SharpCifs.Util.Sharpen;
namespace SharpCifs.Smb
{
internal abstract class AndXServerMessageBlock : ServerMessageBlock
{
private const int AndxCommandOffset = 1;
private const int AndxReservedOffset = 2;
private const int AndxOffsetOffset = 3;
private byte _andxCommand = unchecked(unchecked(0xFF));
private int _andxOffset;
internal ServerMessageBlock Andx;
public AndXServerMessageBlock()
{
}
internal AndXServerMessageBlock(ServerMessageBlock andx)
{
if (andx != null)
{
this.Andx = andx;
_andxCommand = andx.Command;
}
}
internal virtual int GetBatchLimit(byte command)
{
return 0;
}
internal override int Encode(byte[] dst, int dstIndex)
{
int start = HeaderStart = dstIndex;
dstIndex += WriteHeaderWireFormat(dst, dstIndex);
dstIndex += WriteAndXWireFormat(dst, dstIndex);
Length = dstIndex - start;
if (Digest != null)
{
Digest.Sign(dst, HeaderStart, Length, this, Response);
}
return Length;
}
internal override int Decode(byte[] buffer, int bufferIndex)
{
int start = HeaderStart = bufferIndex;
bufferIndex += ReadHeaderWireFormat(buffer, bufferIndex);
bufferIndex += ReadAndXWireFormat(buffer, bufferIndex);
Length = bufferIndex - start;
return Length;
}
internal virtual int WriteAndXWireFormat(byte[] dst, int dstIndex)
{
int start = dstIndex;
WordCount = WriteParameterWordsWireFormat(dst, start + AndxOffsetOffset + 2);
WordCount += 4;
// for command, reserved, and offset
dstIndex += WordCount + 1;
WordCount /= 2;
dst[start] = unchecked((byte)(WordCount & unchecked(0xFF)));
ByteCount = WriteBytesWireFormat(dst, dstIndex + 2);
dst[dstIndex++] = unchecked((byte)(ByteCount & unchecked(0xFF)));
dst[dstIndex++] = unchecked((byte)((ByteCount >> 8) & unchecked(0xFF)));
dstIndex += ByteCount;
if (Andx == null || SmbConstants.UseBatching == false || BatchLevel >= GetBatchLimit(Andx.Command
))
{
_andxCommand = unchecked(unchecked(0xFF));
Andx = null;
dst[start + AndxCommandOffset] = unchecked(unchecked(0xFF));
dst[start + AndxReservedOffset] = unchecked(unchecked(0x00));
// dst[start + ANDX_OFFSET_OFFSET] = (byte)0x00;
// dst[start + ANDX_OFFSET_OFFSET + 1] = (byte)0x00;
dst[start + AndxOffsetOffset] = unchecked(unchecked(0xde));
dst[start + AndxOffsetOffset + 1] = unchecked(unchecked(0xde));
// andx not used; return
return dstIndex - start;
}
Andx.BatchLevel = BatchLevel + 1;
dst[start + AndxCommandOffset] = _andxCommand;
dst[start + AndxReservedOffset] = unchecked(unchecked(0x00));
_andxOffset = dstIndex - HeaderStart;
WriteInt2(_andxOffset, dst, start + AndxOffsetOffset);
Andx.UseUnicode = UseUnicode;
if (Andx is AndXServerMessageBlock)
{
Andx.Uid = Uid;
dstIndex += ((AndXServerMessageBlock)Andx).WriteAndXWireFormat(dst, dstIndex
);
}
else
{
// the andx smb is not of type andx so lets just write it here and
// were done.
int andxStart = dstIndex;
Andx.WordCount = Andx.WriteParameterWordsWireFormat(dst, dstIndex);
dstIndex += Andx.WordCount + 1;
Andx.WordCount /= 2;
dst[andxStart] = unchecked((byte)(Andx.WordCount & unchecked(0xFF)));
Andx.ByteCount = Andx.WriteBytesWireFormat(dst, dstIndex + 2);
dst[dstIndex++] = unchecked((byte)(Andx.ByteCount & unchecked(0xFF)));
dst[dstIndex++] = unchecked((byte)((Andx.ByteCount >> 8) & unchecked(0xFF)
));
dstIndex += Andx.ByteCount;
}
return dstIndex - start;
}
internal virtual int ReadAndXWireFormat(byte[] buffer, int bufferIndex)
{
int start = bufferIndex;
WordCount = buffer[bufferIndex++];
if (WordCount != 0)
{
_andxCommand = buffer[bufferIndex];
_andxOffset = ReadInt2(buffer, bufferIndex + 2);
if (_andxOffset == 0)
{
_andxCommand = unchecked(unchecked(0xFF));
}
if (WordCount > 2)
{
ReadParameterWordsWireFormat(buffer, bufferIndex + 4);
if (Command == SmbComNtCreateAndx && ((SmbComNtCreateAndXResponse)this).IsExtended)
{
WordCount += 8;
}
}
bufferIndex = start + 1 + (WordCount * 2);
}
ByteCount = ReadInt2(buffer, bufferIndex);
bufferIndex += 2;
if (ByteCount != 0)
{
int n;
n = ReadBytesWireFormat(buffer, bufferIndex);
bufferIndex += ByteCount;
}
if (ErrorCode != 0 || _andxCommand == unchecked(unchecked(0xFF)))
{
_andxCommand = unchecked(unchecked(0xFF));
Andx = null;
}
else
{
if (Andx == null)
{
_andxCommand = unchecked(unchecked(0xFF));
throw new RuntimeException("no andx command supplied with response");
}
bufferIndex = HeaderStart + _andxOffset;
Andx.HeaderStart = HeaderStart;
Andx.Command = _andxCommand;
Andx.ErrorCode = ErrorCode;
Andx.Flags = Flags;
Andx.Flags2 = Flags2;
Andx.Tid = Tid;
Andx.Pid = Pid;
Andx.Uid = Uid;
Andx.Mid = Mid;
Andx.UseUnicode = UseUnicode;
if (Andx is AndXServerMessageBlock)
{
bufferIndex += ((AndXServerMessageBlock)Andx).ReadAndXWireFormat(buffer
, bufferIndex);
}
else
{
buffer[bufferIndex++] = unchecked((byte)(Andx.WordCount & unchecked(0xFF))
);
if (Andx.WordCount != 0)
{
if (Andx.WordCount > 2)
{
bufferIndex += Andx.ReadParameterWordsWireFormat(buffer, bufferIndex);
}
}
Andx.ByteCount = ReadInt2(buffer, bufferIndex);
bufferIndex += 2;
if (Andx.ByteCount != 0)
{
Andx.ReadBytesWireFormat(buffer, bufferIndex);
bufferIndex += Andx.ByteCount;
}
}
Andx.Received = true;
}
return bufferIndex - start;
}
public override string ToString()
{
return base.ToString() + ",andxCommand=0x" + Hexdump.ToHexString(_andxCommand
, 2) + ",andxOffset=" + _andxOffset;
}
}
}
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