jellyfin/Emby.Common.Implementations/IO/SharpCifs/Smb/Trans2QueryFSInformationResponse.cs
2017-06-21 02:46:57 -04:00

191 lines
6.4 KiB
C#

// 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
namespace SharpCifs.Smb
{
internal class Trans2QueryFsInformationResponse : SmbComTransactionResponse
{
internal const int SMB_INFO_ALLOCATION = 1;
internal const int SmbQueryFsSizeInfo = unchecked(0x103);
internal const int SmbFsFullSizeInformation = 1007;
internal class SmbInfoAllocation : IAllocInfo
{
internal long Alloc;
internal long Free;
internal int SectPerAlloc;
internal int BytesPerSect;
// information levels
// Also handles SmbQueryFSSizeInfo
public virtual long GetCapacity()
{
return Alloc * SectPerAlloc * BytesPerSect;
}
public virtual long GetFree()
{
return Free * SectPerAlloc * BytesPerSect;
}
public override string ToString()
{
return "SmbInfoAllocation["
+ "alloc=" + Alloc
+ ",free=" + Free
+ ",sectPerAlloc=" + SectPerAlloc
+ ",bytesPerSect=" + BytesPerSect + "]";
}
internal SmbInfoAllocation(Trans2QueryFsInformationResponse enclosing)
{
this._enclosing = enclosing;
}
private readonly Trans2QueryFsInformationResponse _enclosing;
}
private int _informationLevel;
internal IAllocInfo Info;
internal Trans2QueryFsInformationResponse(int informationLevel)
{
this._informationLevel = informationLevel;
Command = SmbComTransaction2;
SubCommand = Smb.SmbComTransaction.Trans2QueryFsInformation;
}
internal override int WriteSetupWireFormat(byte[] dst, int dstIndex)
{
return 0;
}
internal override int WriteParametersWireFormat(byte[] dst, int dstIndex)
{
return 0;
}
internal override int WriteDataWireFormat(byte[] dst, int dstIndex)
{
return 0;
}
internal override int ReadSetupWireFormat(byte[] buffer, int bufferIndex, int len)
{
return 0;
}
internal override int ReadParametersWireFormat(byte[] buffer,
int bufferIndex,
int len)
{
return 0;
}
internal override int ReadDataWireFormat(byte[] buffer, int bufferIndex, int len)
{
switch (_informationLevel)
{
case SMB_INFO_ALLOCATION:
{
return ReadSmbInfoAllocationWireFormat(buffer, bufferIndex);
}
case SmbQueryFsSizeInfo:
{
return ReadSmbQueryFsSizeInfoWireFormat(buffer, bufferIndex);
}
case SmbFsFullSizeInformation:
{
return ReadFsFullSizeInformationWireFormat(buffer, bufferIndex);
}
default:
{
return 0;
}
}
}
internal virtual int ReadSmbInfoAllocationWireFormat(byte[] buffer, int bufferIndex)
{
int start = bufferIndex;
SmbInfoAllocation info = new SmbInfoAllocation(this);
bufferIndex += 4;
// skip idFileSystem
info.SectPerAlloc = ReadInt4(buffer, bufferIndex);
bufferIndex += 4;
info.Alloc = ReadInt4(buffer, bufferIndex);
bufferIndex += 4;
info.Free = ReadInt4(buffer, bufferIndex);
bufferIndex += 4;
info.BytesPerSect = ReadInt2(buffer, bufferIndex);
bufferIndex += 4;
this.Info = info;
return bufferIndex - start;
}
internal virtual int ReadSmbQueryFsSizeInfoWireFormat(byte[] buffer, int bufferIndex)
{
int start = bufferIndex;
SmbInfoAllocation info = new SmbInfoAllocation(this);
info.Alloc = ReadInt8(buffer, bufferIndex);
bufferIndex += 8;
info.Free = ReadInt8(buffer, bufferIndex);
bufferIndex += 8;
info.SectPerAlloc = ReadInt4(buffer, bufferIndex);
bufferIndex += 4;
info.BytesPerSect = ReadInt4(buffer, bufferIndex);
bufferIndex += 4;
this.Info = info;
return bufferIndex - start;
}
internal virtual int ReadFsFullSizeInformationWireFormat(byte[] buffer,
int bufferIndex)
{
int start = bufferIndex;
SmbInfoAllocation info = new SmbInfoAllocation(this);
// Read total allocation units.
info.Alloc = ReadInt8(buffer, bufferIndex);
bufferIndex += 8;
// read caller available allocation units
info.Free = ReadInt8(buffer, bufferIndex);
bufferIndex += 8;
// skip actual free units
bufferIndex += 8;
info.SectPerAlloc = ReadInt4(buffer, bufferIndex);
bufferIndex += 4;
info.BytesPerSect = ReadInt4(buffer, bufferIndex);
bufferIndex += 4;
this.Info = info;
return bufferIndex - start;
}
public override string ToString()
{
return "Trans2QueryFSInformationResponse[" + base.ToString() + "]";
}
}
}