/// <summary>
/// to decode the smb data: from the general SmbDada to the concrete Smb Data.
/// </summary>
/// <exception cref="NotImplementedException">
/// TD did not define the SmbParameters for Lan Manager Dialect.
/// </exception>
/// <exception cref="NotSupportedException">Unknow SmbParameters structure.</exception>
protected override void DecodeData()
{
if (this.SmbDataBlock.ByteCount > 0)
{
this.smbData.ByteCount = this.smbDataBlock.ByteCount;
if (this.smbParametersBlock.WordCount == WordCountOfNtLanManager)
{
using (MemoryStream stream = new MemoryStream(this.smbDataBlock.Bytes))
{
using (Channel channel = new Channel(null, stream))
{
this.smbData.ServerGuid = channel.Read <Guid>();
this.smbData.SecurityBlob = channel.ReadBytes(this.smbData.ByteCount
- CifsMessageUtils.GetSize <Guid>(this.smbData.ServerGuid));
}
}
}
else if (this.smbParametersBlock.WordCount == WordCountOfLanManager)
{
throw new NotImplementedException("TD did not define the SmbParameters for Lan Manager Dialect.");
}
else if (this.smbParametersBlock.WordCount != WordCountOfCoreProtocol)
{
throw new NotSupportedException("Unknow SmbParameters structure.");
}
}
else
{
this.smbData.ByteCount = this.SmbDataBlock.ByteCount;
}
}
/// <summary>
/// to decode the smb parameters: from the general SmbParameters to the concrete Smb Parameters.
/// </summary>
protected override void DecodeParameters()
{
// When a client requests extended information, the word count must be 42
if (this.smbParametersBlock.WordCount == CREATE_EXTENDED_INFORMATION_RESPONSE_LENGTH)
{
SMB_COM_NT_CREATE_ANDX_Response_SMB_Parameters param =
new SMB_COM_NT_CREATE_ANDX_Response_SMB_Parameters();
using (MemoryStream stream = new MemoryStream(
CifsMessageUtils.ToBytesArray <ushort>(this.smbParametersBlock.Words)))
{
using (Channel channel = new Channel(null, stream))
{
param.WordCount = this.smbParametersBlock.WordCount;
param.AndXCommand = channel.Read <SmbCommand>();
param.AndXReserved = channel.Read <byte>();
param.AndXOffset = channel.Read <ushort>();
param.OplockLevel = channel.Read <OplockLevelValue>();
param.FID = channel.Read <ushort>();
param.CreationAction = channel.Read <uint>();
param.CreateTime = channel.Read <Cifs.FileTime>();
param.LastAccessTime = channel.Read <Cifs.FileTime>();
param.LastWriteTime = channel.Read <Cifs.FileTime>();
param.LastChangeTime = channel.Read <Cifs.FileTime>();
param.ExtFileAttributes = channel.Read <uint>();
param.AllocationSize = channel.Read <ulong>();
param.EndOfFile = channel.Read <ulong>();
param.ResourceType = channel.Read <FileTypeValue>();
param.NMPipeStatus_or_FileStatusFlags = channel.Read <SMB_NMPIPE_STATUS>();
param.Directory = channel.Read <byte>();
// VolumeGUID (16 bytes), td defines this length
param.VolumeGUID = channel.ReadBytes(CifsMessageUtils.GetSize <Guid>(new Guid()));
// if there is more 16 bytes in the channel.
if (channel.Stream.Position <= channel.Stream.Length - WINDOWS_BEHAVIOR_ADDITIONAL_DATA_LENGTH)
{
// FileId (8 bytes), td defines this length
param.FileId = channel.ReadBytes(sizeof(ulong));
// MaximalAccessRights (4 bytes), td defines this length
param.MaximalAccessRights = channel.ReadBytes(sizeof(uint));
// GuestMaximalAccessRights (4 bytes), td defines this length
param.GuestMaximalAccessRights = channel.ReadBytes(sizeof(uint));
}
}
}
this.SmbParameters = param;
}
else
{
base.DecodeParameters();
this.smbParameters = SmbMessageUtils.ConvertSmbComCreatePacketPayload(base.SmbParameters);
}
}
/// <summary>
/// to new a Smb request packet in type of the Command in SmbHeader.
/// </summary>
/// <param name="messageBytes">bytes contains packet</param>
/// <returns>
/// the new request packet.
/// the null means that the utility don't know how to create the request.
/// </returns>
protected override SmbPacket CreateSmbRequestPacket(byte[] messageBytes)
{
SmbPacket smbRequest = null;
using (MemoryStream stream = new MemoryStream(messageBytes, true))
{
using (Channel channel = new Channel(null, stream))
{
// read smb header and new SmbPacket:
if (channel.Stream.Position < channel.Stream.Length &&
messageBytes.Length >= CifsMessageUtils.GetSize <SmbHeader>(new SmbHeader()))
{
SmbHeader smbHeader = channel.Read <SmbHeader>();
smbRequest = FindTheTargetPacket(smbHeader, channel);
}
}
}
return(smbRequest);
}
/// <summary>
/// Encode the struct of NtTransParameters into the byte array in SmbData.NT_Trans_Parameters
/// </summary>
protected override void EncodeNtTransParameters()
{
if ((this.smbHeader.Flags2 & SmbFlags2.SMB_FLAGS2_UNICODE) == SmbFlags2.SMB_FLAGS2_UNICODE)
{
int ntTransParameterSize = CifsMessageUtils.GetSize <NT_TRANSACT_CREATE_Request_NT_Trans_Parameters>(
this.ntTransParameters) + PaddingSize;
this.smbData.NT_Trans_Parameters = new byte[ntTransParameterSize];
using (MemoryStream memoryStream = new MemoryStream(this.smbData.NT_Trans_Parameters))
{
using (Channel channel = new Channel(null, memoryStream))
{
channel.BeginWriteGroup();
channel.Write <NtTransactFlags>(this.ntTransParameters.Flags);
channel.Write <uint>(this.ntTransParameters.RootDirectoryFID);
channel.Write <NtTransactDesiredAccess>(this.ntTransParameters.DesiredAccess);
channel.Write <ulong>(this.ntTransParameters.AllocationSize);
channel.Write <SMB_EXT_FILE_ATTR>(this.ntTransParameters.ExtFileAttributes);
channel.Write <NtTransactShareAccess>(this.ntTransParameters.ShareAccess);
channel.Write <NtTransactCreateDisposition>(this.ntTransParameters.CreateDisposition);
channel.Write <NtTransactCreateOptions>(this.ntTransParameters.CreateOptions);
channel.Write <uint>(this.ntTransParameters.SecurityDescriptorLength);
channel.Write <uint>(this.ntTransParameters.EALength);
channel.Write <uint>(this.ntTransParameters.NameLength);
channel.Write <NtTransactImpersonationLevel>(this.ntTransParameters.ImpersonationLevel);
channel.Write <NtTransactSecurityFlags>(this.ntTransParameters.SecurityFlags);
// Padding data
channel.WriteBytes(new byte[PaddingSize]);
channel.WriteBytes(this.ntTransParameters.Name);
channel.EndWriteGroup();
}
}
}
else
{
this.smbData.NT_Trans_Parameters =
CifsMessageUtils.ToBytes <NT_TRANSACT_CREATE_Request_NT_Trans_Parameters>(this.ntTransParameters);
}
}
protected override void EncodeTrans2Data()
{
int totalSize = 0;
int fixedSize = 0; // The fixed size of each structure
if (this.trans2Data.Data != null)
{
Type type = this.trans2Data.Data.GetType();
if (type == typeof(SMB_INFO_STANDARD_OF_TRANS2_FIND_FIRST2[]))
{
SMB_INFO_STANDARD_OF_TRANS2_FIND_FIRST2[] standardArray = (
SMB_INFO_STANDARD_OF_TRANS2_FIND_FIRST2[])this.trans2Data.Data;
fixedSize = (this.smbHeader.Flags2 & SmbFlags2.SMB_FLAGS2_UNICODE) ==
SmbFlags2.SMB_FLAGS2_UNICODE ? 26 : 24;
ushort resumeKeyLength = 4;
if (isResumeKeyExisted)
{
totalSize = (resumeKeyLength + fixedSize) * standardArray.Length;
}
else
{
totalSize = fixedSize * standardArray.Length;
}
for (int i = 0; i < standardArray.Length; i++)
{
totalSize += standardArray[i].FileNameLength;
}
this.smbData.Trans2_Data = new byte[totalSize];
using (MemoryStream memoryStream = new MemoryStream(this.smbData.Trans2_Data))
{
using (Channel channel = new Channel(null, memoryStream))
{
channel.BeginWriteGroup();
for (int i = 0; i < standardArray.Length; i++)
{
if (isResumeKeyExisted)
{
channel.Write <uint>(standardArray[i].ResumeKey);
}
channel.Write <SmbDate>(standardArray[i].CreationDate);
channel.Write <SmbTime>(standardArray[i].CreationTime);
channel.Write <SmbDate>(standardArray[i].LastAccessDate);
channel.Write <SmbTime>(standardArray[i].LastAccessTime);
channel.Write <SmbDate>(standardArray[i].LastWriteDate);
channel.Write <SmbTime>(standardArray[i].LastWriteTime);
channel.Write <uint>(standardArray[i].DataSize);
channel.Write <uint>(standardArray[i].AllocationSize);
channel.Write <SmbFileAttributes>(standardArray[i].Attributes);
channel.Write <byte>(standardArray[i].FileNameLength);
if ((this.smbHeader.Flags2 & SmbFlags2.SMB_FLAGS2_UNICODE) == SmbFlags2.SMB_FLAGS2_UNICODE)
{
channel.Write <byte>(new byte());
}
channel.WriteBytes(standardArray[i].FileName);
if ((this.smbHeader.Flags2 & SmbFlags2.SMB_FLAGS2_UNICODE) == SmbFlags2.SMB_FLAGS2_UNICODE)
{
channel.Write <ushort>(new ushort());
}
else
{
channel.Write <byte>(new byte());
}
}
channel.EndWriteGroup();
}
}
}
else if (type == typeof(SMB_INFO_QUERY_EA_SIZE_OF_TRANS2_FIND_FIRST2[]))
{
SMB_INFO_QUERY_EA_SIZE_OF_TRANS2_FIND_FIRST2[] queryEaArray = (
SMB_INFO_QUERY_EA_SIZE_OF_TRANS2_FIND_FIRST2[])this.trans2Data.Data;
fixedSize = 28;
ushort resumeKeyLength = 4;
if (isResumeKeyExisted)
{
totalSize = (resumeKeyLength + fixedSize) * queryEaArray.Length;
}
else
{
totalSize = fixedSize * queryEaArray.Length;
}
for (int i = 0; i < queryEaArray.Length; i++)
{
totalSize += queryEaArray[i].FileNameLength;
}
this.smbData.Trans2_Data = new byte[totalSize];
using (MemoryStream memoryStream = new MemoryStream(this.smbData.Trans2_Data))
{
using (Channel channel = new Channel(null, memoryStream))
{
channel.BeginWriteGroup();
for (int i = 0; i < queryEaArray.Length; i++)
{
if (isResumeKeyExisted)
{
channel.Write <uint>(queryEaArray[i].ResumeKey);
}
channel.Write <SmbDate>(queryEaArray[i].CreationDate);
channel.Write <SmbTime>(queryEaArray[i].CreationTime);
channel.Write <SmbDate>(queryEaArray[i].LastAccessDate);
channel.Write <SmbTime>(queryEaArray[i].LastAccessTime);
channel.Write <SmbDate>(queryEaArray[i].LastWriteDate);
channel.Write <SmbTime>(queryEaArray[i].LastWriteTime);
channel.Write <uint>(queryEaArray[i].DataSize);
channel.Write <uint>(queryEaArray[i].AllocationSize);
channel.Write <SmbFileAttributes>(queryEaArray[i].Attributes);
channel.Write <uint>(queryEaArray[i].EaSize);
channel.Write <byte>(queryEaArray[i].FileNameLength);
channel.WriteBytes(queryEaArray[i].FileName);
channel.Write <byte>(new byte());
}
channel.EndWriteGroup();
}
}
}
else if (type == typeof(SMB_INFO_QUERY_EAS_FROM_LIST_OF_TRANS2_FIND_FIRST2[]))
{
SMB_INFO_QUERY_EAS_FROM_LIST_OF_TRANS2_FIND_FIRST2[] queryEaFromListArray = (
SMB_INFO_QUERY_EAS_FROM_LIST_OF_TRANS2_FIND_FIRST2[])this.trans2Data.Data;
fixedSize = 24;
ushort resumeKeyLength = 4;
if (isResumeKeyExisted)
{
totalSize = (resumeKeyLength + fixedSize) * queryEaFromListArray.Length;
}
else
{
totalSize = fixedSize * queryEaFromListArray.Length;
}
for (int i = 0; i < queryEaFromListArray.Length; i++)
{
totalSize += (int)(queryEaFromListArray[i].FileNameLength +
queryEaFromListArray[i].EaSize);
}
this.smbData.Trans2_Data = new byte[totalSize];
using (MemoryStream memoryStream = new MemoryStream(this.smbData.Trans2_Data))
{
using (Channel channel = new Channel(null, memoryStream))
{
channel.BeginWriteGroup();
for (int i = 0; i < queryEaFromListArray.Length; i++)
{
if (isResumeKeyExisted)
{
channel.Write <uint>(queryEaFromListArray[i].ResumeKey);
}
channel.Write <SmbDate>(queryEaFromListArray[i].CreationDate);
channel.Write <SmbTime>(queryEaFromListArray[i].CreationTime);
channel.Write <SmbDate>(queryEaFromListArray[i].LastAccessDate);
channel.Write <SmbTime>(queryEaFromListArray[i].LastAccessTime);
channel.Write <SmbDate>(queryEaFromListArray[i].LastWriteDate);
channel.Write <SmbTime>(queryEaFromListArray[i].LastWriteTime);
channel.Write <uint>(queryEaFromListArray[i].DataSize);
channel.Write <uint>(queryEaFromListArray[i].AllocationSize);
channel.Write <SmbFileAttributes>(queryEaFromListArray[i].Attributes);
channel.Write <uint>(queryEaFromListArray[i].EaSize);
if (queryEaFromListArray[i].ExtendedAttributeList != null)
{
foreach (SMB_FEA smbEa in queryEaFromListArray[i].ExtendedAttributeList)
{
channel.Write <SMB_FEA>(smbEa);
}
}
channel.Write <byte>(queryEaFromListArray[i].FileNameLength);
channel.WriteBytes(queryEaFromListArray[i].FileName);
channel.Write <byte>(new byte());
}
channel.EndWriteGroup();
}
}
}
else if (type == typeof(SMB_FIND_FILE_DIRECTORY_INFO_OF_TRANS2_FIND_FIRST2[]))
{
SMB_FIND_FILE_DIRECTORY_INFO_OF_TRANS2_FIND_FIRST2[] fileInfoArray = (
SMB_FIND_FILE_DIRECTORY_INFO_OF_TRANS2_FIND_FIRST2[])this.trans2Data.Data;
fixedSize = 64; // Including the fixed length of this structure.
totalSize = fixedSize * fileInfoArray.Length;
int pad = 0;
for (int i = 0; i < fileInfoArray.Length; i++)
{
totalSize += (int)(fileInfoArray[i].FileNameLength);
pad = (int)(fileInfoArray[i].NextEntryOffset - fixedSize - fileInfoArray[i].FileNameLength);
if (pad > 0)
{
totalSize += pad;
}
}
this.smbData.Trans2_Data = new byte[totalSize];
using (MemoryStream memoryStream = new MemoryStream(this.smbData.Trans2_Data))
{
using (Channel channel = new Channel(null, memoryStream))
{
channel.BeginWriteGroup();
for (int i = 0; i < fileInfoArray.Length; i++)
{
fixedSize = 64; // Including the fixed length of this structure.
channel.Write <SMB_FIND_FILE_DIRECTORY_INFO_OF_TRANS2_FIND_FIRST2>(fileInfoArray[i]);
fixedSize += (int)fileInfoArray[i].FileNameLength; // Add the length of file name and pad.
pad = (int)(fileInfoArray[i].NextEntryOffset - fixedSize);
if (pad > 0)
{
channel.WriteBytes(new byte[pad]);
}
}
channel.EndWriteGroup();
}
}
}
else if (type == typeof(SMB_FIND_FILE_FULL_DIRECTORY_INFO_OF_TRANS2_FIND_FIRST2[]))
{
SMB_FIND_FILE_FULL_DIRECTORY_INFO_OF_TRANS2_FIND_FIRST2[] fullInfoArray =
(SMB_FIND_FILE_FULL_DIRECTORY_INFO_OF_TRANS2_FIND_FIRST2[])this.trans2Data.Data;
fixedSize = 68; // Including the fixed length of this structure.
totalSize = fixedSize * fullInfoArray.Length;
int pad = 0;
for (int i = 0; i < fullInfoArray.Length; i++)
{
totalSize += (int)(fullInfoArray[i].FileNameLength + fullInfoArray[i].EaSize);
pad = (int)(fullInfoArray[i].NextEntryOffset - fixedSize - fullInfoArray[i].FileNameLength);
if (pad > 0)
{
totalSize += pad;
}
}
this.smbData.Trans2_Data = new byte[totalSize];
using (MemoryStream memoryStream = new MemoryStream(this.smbData.Trans2_Data))
{
using (Channel channel = new Channel(null, memoryStream))
{
channel.BeginWriteGroup();
for (int i = 0; i < fullInfoArray.Length; i++)
{
fixedSize = 68; // Including the fixed length of this structure.
channel.Write <SMB_FIND_FILE_FULL_DIRECTORY_INFO_OF_TRANS2_FIND_FIRST2>(fullInfoArray[i]);
fixedSize += (int)fullInfoArray[i].FileNameLength; // Add the length of file name and pad.
pad = (int)(fullInfoArray[i].NextEntryOffset - fixedSize);
if (pad > 0)
{
channel.WriteBytes(new byte[pad]);
}
}
channel.EndWriteGroup();
}
}
}
else if (type == typeof(SMB_FIND_FILE_BOTH_DIRECTORY_INFO_OF_TRANS2_FIND_FIRST2[]))
{
SMB_FIND_FILE_BOTH_DIRECTORY_INFO_OF_TRANS2_FIND_FIRST2[] bothInfoArray = (
SMB_FIND_FILE_BOTH_DIRECTORY_INFO_OF_TRANS2_FIND_FIRST2[])this.trans2Data.Data;
List <byte> buffer = new List <byte>();
for (int i = 0; i < bothInfoArray.Length; i++)
{
SMB_FIND_FILE_BOTH_DIRECTORY_INFO_OF_TRANS2_FIND_FIRST2 item = bothInfoArray[i];
// update the next entry offset.
int len = CifsMessageUtils.GetSize <SMB_FIND_FILE_BOTH_DIRECTORY_INFO_OF_TRANS2_FIND_FIRST2>(item);
item.NextEntryOffset = (uint)len;
if (i + 1 < bothInfoArray.Length)
{
item.NextEntryOffset += (uint)CifsMessageUtils.CalculatePadLength(len, 8);
}
byte[] data = CifsMessageUtils.ToBytes <SMB_FIND_FILE_BOTH_DIRECTORY_INFO_OF_TRANS2_FIND_FIRST2>(item);
buffer.AddRange(data);
if (i + 1 < bothInfoArray.Length)
{
// 8 bytes align
buffer.AddRange(new byte[CifsMessageUtils.CalculatePadLength(data.Length, 8)]);
}
}
this.smbData.Trans2_Data = buffer.ToArray();
}
else if (type == typeof(SMB_FIND_FILE_NAMES_INFO_OF_TRANS2_FIND_FIRST2[]))
{
SMB_FIND_FILE_NAMES_INFO_OF_TRANS2_FIND_FIRST2[] namesInfoArray = (
SMB_FIND_FILE_NAMES_INFO_OF_TRANS2_FIND_FIRST2[])this.trans2Data.Data;
fixedSize = 12; // Including the fixed length of this structure.
totalSize = fixedSize * namesInfoArray.Length;
int pad = 0;
for (int i = 0; i < namesInfoArray.Length; i++)
{
totalSize += (int)(namesInfoArray[i].FileNameLength);
pad = (int)(namesInfoArray[i].NextEntryOffset - fixedSize - namesInfoArray[i].FileNameLength);
if (pad > 0)
{
totalSize += pad;
}
}
this.smbData.Trans2_Data = new byte[totalSize];
using (MemoryStream memoryStream = new MemoryStream(this.smbData.Trans2_Data))
{
using (Channel channel = new Channel(null, memoryStream))
{
channel.BeginWriteGroup();
for (int i = 0; i < namesInfoArray.Length; i++)
{
fixedSize = 12; // Including the fixed length of this structure.
channel.Write <SMB_FIND_FILE_NAMES_INFO_OF_TRANS2_FIND_FIRST2>(namesInfoArray[i]);
fixedSize += (int)namesInfoArray[i].FileNameLength; // Add the length of file name.
pad = (int)(namesInfoArray[i].NextEntryOffset - fixedSize);
if (pad > 0)
{
channel.WriteBytes(new byte[pad]);
}
}
channel.EndWriteGroup();
}
}
}
}
else
{
this.smbData.Trans2_Data = new byte[0];
}
}
/// <summary>
/// convert data to SMB_FIND_FILE_BOTH_DIRECTORY_INFO array.
/// </summary>
/// <param name="informationLevel">the information level</param>
/// <param name="arraySize">the array size</param>
/// <param name="data">the data</param>
/// <returns>the unmarshaled result</returns>
public static object UnmarshalSmbFindInformationLevelPayloads(
FindInformationLevel informationLevel,
int arraySize, byte[] data)
{
switch ((FindInformationLevel)informationLevel)
{
case FindInformationLevel.SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
{
SMB_FIND_FILE_BOTH_DIRECTORY_INFO[] result =
new SMB_FIND_FILE_BOTH_DIRECTORY_INFO[arraySize];
using (MemoryStream memoryStream = new MemoryStream(data))
{
using (Channel channel = new Channel(null, memoryStream))
{
for (int i = 0; i < result.Length; i++)
{
result[i] = channel.Read <SMB_FIND_FILE_BOTH_DIRECTORY_INFO>();
int pad = Convert.ToInt32(result[i].NextEntryOffset -
CifsMessageUtils.GetSize <SMB_FIND_FILE_BOTH_DIRECTORY_INFO>(result[i]));
if (pad > 0)
{
channel.ReadBytes(pad);
}
}
}
}
return(result);
}
case FindInformationLevel.SMB_FIND_FILE_ID_FULL_DIRECTORY_INFO:
{
SMB_FIND_FILE_ID_FULL_DIRECTORY_INFO[] result =
new SMB_FIND_FILE_ID_FULL_DIRECTORY_INFO[arraySize];
using (MemoryStream memoryStream = new MemoryStream(data))
{
using (Channel channel = new Channel(null, memoryStream))
{
for (int i = 0; i < result.Length; i++)
{
result[i] = channel.Read <SMB_FIND_FILE_ID_FULL_DIRECTORY_INFO>();
int pad = Convert.ToInt32(result[i].NextEntryOffset -
CifsMessageUtils.GetSize <SMB_FIND_FILE_ID_FULL_DIRECTORY_INFO>(result[i]));
if (pad > 0)
{
channel.ReadBytes(pad);
}
}
}
}
return(result);
}
case FindInformationLevel.SMB_FIND_FILE_ID_BOTH_DIRECTORY_INFO:
{
SMB_FIND_FILE_ID_BOTH_DIRECTORY_INFO[] result =
new SMB_FIND_FILE_ID_BOTH_DIRECTORY_INFO[arraySize];
using (MemoryStream memoryStream = new MemoryStream(data))
{
using (Channel channel = new Channel(null, memoryStream))
{
for (int i = 0; i < result.Length; i++)
{
result[i] = channel.Read <SMB_FIND_FILE_ID_BOTH_DIRECTORY_INFO>();
int pad = Convert.ToInt32(result[i].NextEntryOffset -
CifsMessageUtils.GetSize <SMB_FIND_FILE_ID_BOTH_DIRECTORY_INFO>(result[i]));
if (pad > 0)
{
channel.ReadBytes(pad);
}
}
}
}
return(result);
}
default:
return(null);
}
}
/// <summary>
/// decode packet from bytes
/// </summary>
/// <param name="connectId">the connection identity.</param>
/// <param name="messageBytes">bytes contains packet</param>
/// <param name="consumedLength">the bytes length which are consumed when decode.</param>
/// <returns>the decoded packet from the bytes array. if failed, return null.</returns>
protected SmbPacket DecodeSmbResponseFromBytes(
int connectId,
byte[] messageBytes,
out int consumedLength)
{
consumedLength = 0;
SmbPacket smbRequest = null;
SmbPacket smbResponse = null;
using (MemoryStream memoryStream = new MemoryStream(messageBytes, true))
{
using (Channel channel = new Channel(null, memoryStream))
{
// read raw response:
Collection <SmbPacket> outstandingRequests = this.clientContext.GetOutstandingRequests(connectId);
if (outstandingRequests != null && outstandingRequests.Count > 0)
{
SmbReadRawRequestPacket readRawRequest = outstandingRequests[0] as SmbReadRawRequestPacket;
if (readRawRequest != null)
{
SmbReadRawResponsePacket readRawResponse = this.CreateSmbResponsePacket(
readRawRequest, readRawRequest.SmbHeader, channel) as SmbReadRawResponsePacket;
if (readRawResponse != null)
{
byte[] rawData = new byte[messageBytes.Length];
Array.Copy(messageBytes, rawData, rawData.Length);
readRawResponse.RawData = rawData;
consumedLength = rawData.Length;
return(readRawResponse);
}
else
{
// discard the none-parsable data silently:
consumedLength = messageBytes.Length;
return(null);
}
}
else
{
// No SmbReadRawResponsePacket sent, so the response should not be SmbReadRawResponsePacket.
// and do nothing here.
}
}
// read smb header and new SmbPacket:
if (channel.Stream.Position < channel.Stream.Length &&
messageBytes.Length >= CifsMessageUtils.GetSize <SmbHeader>(new SmbHeader()))
{
SmbHeader smbHeader = channel.Read <SmbHeader>();
smbRequest = this.clientContext.GetOutstandingRequest(connectId, smbHeader.Mid);
smbResponse = this.CreateSmbResponsePacket(smbRequest, smbHeader, channel);
consumedLength += smbResponse.HeaderSize;
}
else
{
// The data in the channel is less than the size of SmbHeader. consume nothing and return null:
consumedLength = 0;
return(null);
}
// read SmbParameters:
consumedLength += smbResponse.ReadParametersFromChannel(channel);
// read SmbData:
consumedLength += smbResponse.ReadDataFromChannel(channel);
// read andx:
SmbBatchedResponsePacket smbBatchedResponse = smbResponse as SmbBatchedResponsePacket;
if (smbRequest != null && smbBatchedResponse != null)
{
consumedLength += DecodeBatchedRequest(channel, smbRequest, smbBatchedResponse);
}
// handle the difference of protocol implementation:
SmbWriteAndCloseResponsePacket writeAndCloseResponse = smbResponse as SmbWriteAndCloseResponsePacket;
if (writeAndCloseResponse != null)
{
if (this.clientConfig.IsWriteAndCloseResponseExtraPadding)
{
// Windows NT Server appends three NULL bytes to this message, following the ByteCount field.
// These three bytes are not message data and can safely be discarded.
const int PaddingLength = 3;
writeAndCloseResponse.PaddingBytes = channel.ReadBytes(PaddingLength);
consumedLength += PaddingLength;
}
}
}
}
return(smbResponse);
}
