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347 lines
12 KiB
C#
347 lines
12 KiB
C#
// This code is derived from jcifs smb client library <jcifs at samba dot org>
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// Ported by J. Arturo <webmaster at komodosoft dot net>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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using System;
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using SharpCifs.Util;
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namespace SharpCifs.Smb
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{
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internal abstract class SmbComTransaction : ServerMessageBlock
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{
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private static readonly int DefaultMaxDataCount = Config.GetInt("jcifs.smb.client.transaction_buf_size"
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, TransactionBufSize) - 512;
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private const int PrimarySetupOffset = 61;
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private const int SecondaryParameterOffset = 51;
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private const int DisconnectTid = unchecked(0x01);
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private const int OneWayTransaction = unchecked(0x02);
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private const int PaddingSize = 2;
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private int _flags = unchecked(0x00);
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private int _fid;
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private int _pad;
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private int _pad1;
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private bool _hasMore = true;
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private bool _isPrimary = true;
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private int _bufParameterOffset;
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private int _bufDataOffset;
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internal const int TransactionBufSize = unchecked(0xFFFF);
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internal const byte Trans2FindFirst2 = unchecked(unchecked(0x01));
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internal const byte Trans2FindNext2 = unchecked(unchecked(0x02));
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internal const byte Trans2QueryFsInformation = unchecked(unchecked(0x03));
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internal const byte Trans2QueryPathInformation = unchecked(unchecked(0x05));
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internal const byte Trans2GetDfsReferral = unchecked(unchecked(0x10));
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internal const byte Trans2SetFileInformation = unchecked(unchecked(0x08));
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internal const int NetShareEnum = unchecked(0x0000);
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internal const int NetServerEnum2 = unchecked(0x0068);
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internal const int NetServerEnum3 = unchecked(0x00D7);
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internal const byte TransPeekNamedPipe = unchecked(unchecked(0x23
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));
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internal const byte TransWaitNamedPipe = unchecked(unchecked(0x53
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));
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internal const byte TransCallNamedPipe = unchecked(unchecked(0x54
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));
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internal const byte TransTransactNamedPipe = unchecked(unchecked(0x26));
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protected internal int primarySetupOffset;
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protected internal int secondaryParameterOffset;
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protected internal int ParameterCount;
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protected internal int ParameterOffset;
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protected internal int ParameterDisplacement;
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protected internal int DataCount;
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protected internal int DataOffset;
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protected internal int DataDisplacement;
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internal int TotalParameterCount;
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internal int TotalDataCount;
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internal int MaxParameterCount;
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internal int MaxDataCount = DefaultMaxDataCount;
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internal byte MaxSetupCount;
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internal int Timeout = 0;
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internal int SetupCount = 1;
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internal byte SubCommand;
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internal string Name = string.Empty;
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internal int MaxBufferSize;
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internal byte[] TxnBuf;
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public SmbComTransaction()
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{
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// relative to headerStart
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// set in SmbTransport.sendTransaction() before nextElement called
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MaxParameterCount = 1024;
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primarySetupOffset = PrimarySetupOffset;
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secondaryParameterOffset = SecondaryParameterOffset;
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}
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internal override void Reset()
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{
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base.Reset();
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_isPrimary = _hasMore = true;
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}
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internal virtual void Reset(int key, string lastName)
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{
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Reset();
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}
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public virtual bool MoveNext()
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{
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return _hasMore;
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}
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public virtual object Current()
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{
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if (_isPrimary)
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{
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_isPrimary = false;
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ParameterOffset = primarySetupOffset + (SetupCount * 2) + 2;
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if (Command != SmbComNtTransact)
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{
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if (Command == SmbComTransaction && IsResponse() == false)
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{
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ParameterOffset += StringWireLength(Name, ParameterOffset);
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}
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}
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else
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{
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if (Command == SmbComNtTransact)
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{
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ParameterOffset += 2;
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}
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}
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_pad = ParameterOffset % PaddingSize;
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_pad = _pad == 0 ? 0 : PaddingSize - _pad;
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ParameterOffset += _pad;
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TotalParameterCount = WriteParametersWireFormat(TxnBuf, _bufParameterOffset);
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_bufDataOffset = TotalParameterCount;
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// data comes right after data
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int available = MaxBufferSize - ParameterOffset;
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ParameterCount = Math.Min(TotalParameterCount, available);
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available -= ParameterCount;
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DataOffset = ParameterOffset + ParameterCount;
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_pad1 = DataOffset % PaddingSize;
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_pad1 = _pad1 == 0 ? 0 : PaddingSize - _pad1;
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DataOffset += _pad1;
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TotalDataCount = WriteDataWireFormat(TxnBuf, _bufDataOffset);
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DataCount = Math.Min(TotalDataCount, available);
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}
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else
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{
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if (Command != SmbComNtTransact)
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{
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Command = SmbComTransactionSecondary;
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}
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else
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{
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Command = SmbComNtTransactSecondary;
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}
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// totalParameterCount and totalDataCount are set ok from primary
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ParameterOffset = SecondaryParameterOffset;
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if ((TotalParameterCount - ParameterDisplacement) > 0)
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{
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_pad = ParameterOffset % PaddingSize;
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_pad = _pad == 0 ? 0 : PaddingSize - _pad;
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ParameterOffset += _pad;
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}
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// caclulate parameterDisplacement before calculating new parameterCount
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ParameterDisplacement += ParameterCount;
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int available = MaxBufferSize - ParameterOffset - _pad;
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ParameterCount = Math.Min(TotalParameterCount - ParameterDisplacement, available);
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available -= ParameterCount;
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DataOffset = ParameterOffset + ParameterCount;
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_pad1 = DataOffset % PaddingSize;
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_pad1 = _pad1 == 0 ? 0 : PaddingSize - _pad1;
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DataOffset += _pad1;
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DataDisplacement += DataCount;
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available -= _pad1;
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DataCount = Math.Min(TotalDataCount - DataDisplacement, available);
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}
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if ((ParameterDisplacement + ParameterCount) >= TotalParameterCount && (DataDisplacement
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+ DataCount) >= TotalDataCount)
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{
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_hasMore = false;
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}
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return this;
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}
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internal override int WriteParameterWordsWireFormat(byte[] dst, int dstIndex)
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{
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int start = dstIndex;
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WriteInt2(TotalParameterCount, dst, dstIndex);
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dstIndex += 2;
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WriteInt2(TotalDataCount, dst, dstIndex);
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dstIndex += 2;
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if (Command != SmbComTransactionSecondary)
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{
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WriteInt2(MaxParameterCount, dst, dstIndex);
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dstIndex += 2;
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WriteInt2(MaxDataCount, dst, dstIndex);
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dstIndex += 2;
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dst[dstIndex++] = MaxSetupCount;
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dst[dstIndex++] = unchecked(unchecked(0x00));
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// Reserved1
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WriteInt2(_flags, dst, dstIndex);
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dstIndex += 2;
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WriteInt4(Timeout, dst, dstIndex);
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dstIndex += 4;
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dst[dstIndex++] = unchecked(unchecked(0x00));
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// Reserved2
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dst[dstIndex++] = unchecked(unchecked(0x00));
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}
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WriteInt2(ParameterCount, dst, dstIndex);
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dstIndex += 2;
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// writeInt2(( parameterCount == 0 ? 0 : parameterOffset ), dst, dstIndex );
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WriteInt2(ParameterOffset, dst, dstIndex);
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dstIndex += 2;
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if (Command == SmbComTransactionSecondary)
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{
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WriteInt2(ParameterDisplacement, dst, dstIndex);
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dstIndex += 2;
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}
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WriteInt2(DataCount, dst, dstIndex);
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dstIndex += 2;
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WriteInt2((DataCount == 0 ? 0 : DataOffset), dst, dstIndex);
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dstIndex += 2;
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if (Command == SmbComTransactionSecondary)
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{
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WriteInt2(DataDisplacement, dst, dstIndex);
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dstIndex += 2;
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}
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else
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{
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dst[dstIndex++] = unchecked((byte)SetupCount);
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dst[dstIndex++] = unchecked(unchecked(0x00));
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// Reserved3
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dstIndex += WriteSetupWireFormat(dst, dstIndex);
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}
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return dstIndex - start;
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}
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internal override int WriteBytesWireFormat(byte[] dst, int dstIndex)
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{
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int start = dstIndex;
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int p = _pad;
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if (Command == SmbComTransaction && IsResponse() == false)
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{
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dstIndex += WriteString(Name, dst, dstIndex);
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}
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if (ParameterCount > 0)
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{
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while (p-- > 0)
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{
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dst[dstIndex++] = unchecked(unchecked(0x00));
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}
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// Pad
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Array.Copy(TxnBuf, _bufParameterOffset, dst, dstIndex, ParameterCount);
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dstIndex += ParameterCount;
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}
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if (DataCount > 0)
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{
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p = _pad1;
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while (p-- > 0)
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{
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dst[dstIndex++] = unchecked(unchecked(0x00));
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}
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// Pad1
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Array.Copy(TxnBuf, _bufDataOffset, dst, dstIndex, DataCount);
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_bufDataOffset += DataCount;
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dstIndex += DataCount;
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}
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return dstIndex - start;
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}
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internal override int ReadParameterWordsWireFormat(byte[] buffer, int bufferIndex
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)
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{
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return 0;
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}
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internal override int ReadBytesWireFormat(byte[] buffer, int bufferIndex)
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{
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return 0;
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}
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internal abstract int WriteSetupWireFormat(byte[] dst, int dstIndex);
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internal abstract int WriteParametersWireFormat(byte[] dst, int dstIndex);
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internal abstract int WriteDataWireFormat(byte[] dst, int dstIndex);
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internal abstract int ReadSetupWireFormat(byte[] buffer, int bufferIndex, int len
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);
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internal abstract int ReadParametersWireFormat(byte[] buffer, int bufferIndex, int
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len);
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internal abstract int ReadDataWireFormat(byte[] buffer, int bufferIndex, int len);
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public override string ToString()
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{
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return base.ToString() + ",totalParameterCount=" + TotalParameterCount
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+ ",totalDataCount=" + TotalDataCount + ",maxParameterCount=" + MaxParameterCount
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+ ",maxDataCount=" + MaxDataCount + ",maxSetupCount=" + (int)MaxSetupCount + ",flags=0x"
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+ Hexdump.ToHexString(_flags, 2) + ",timeout=" + Timeout + ",parameterCount=" +
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ParameterCount + ",parameterOffset=" + ParameterOffset + ",parameterDisplacement="
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+ ParameterDisplacement + ",dataCount=" + DataCount + ",dataOffset=" + DataOffset
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+ ",dataDisplacement=" + DataDisplacement + ",setupCount=" + SetupCount + ",pad="
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+ _pad + ",pad1=" + _pad1;
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}
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}
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}
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