/// <summary>
/// Deep copy constructor.
/// </summary>
public SmbReadRawRequestPacket(SmbReadRawRequestPacket packet)
: base(packet)
{
this.InitDefaultValue();
this.smbParameters.WordCount = packet.SmbParameters.WordCount;
this.smbParameters.FID = packet.SmbParameters.FID;
this.smbParameters.Offset = packet.SmbParameters.Offset;
this.smbParameters.MaxCountOfBytesToReturn = packet.SmbParameters.MaxCountOfBytesToReturn;
this.smbParameters.MinCountOfBytesToReturn = packet.SmbParameters.MinCountOfBytesToReturn;
this.smbParameters.Timeout = packet.SmbParameters.Timeout;
this.smbParameters.Reserved = packet.SmbParameters.Reserved;
this.smbParameters.OffsetHigh = packet.SmbParameters.OffsetHigh;
this.smbData.ByteCount = packet.SmbData.ByteCount;
}
/// <summary>
/// Deep copy constructor.
/// </summary>
public SmbReadRawRequestPacket(SmbReadRawRequestPacket packet)
: base(packet)
{
this.InitDefaultValue();
this.smbParameters.WordCount = packet.SmbParameters.WordCount;
this.smbParameters.FID = packet.SmbParameters.FID;
this.smbParameters.Offset = packet.SmbParameters.Offset;
this.smbParameters.MaxCountOfBytesToReturn = packet.SmbParameters.MaxCountOfBytesToReturn;
this.smbParameters.MinCountOfBytesToReturn = packet.SmbParameters.MinCountOfBytesToReturn;
this.smbParameters.Timeout = packet.SmbParameters.Timeout;
this.smbParameters.Reserved = packet.SmbParameters.Reserved;
this.smbParameters.OffsetHigh = packet.SmbParameters.OffsetHigh;
this.smbData.ByteCount = packet.SmbData.ByteCount;
}
/// <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);
}
/// <summary>
/// to create a ReadRaw request packet.
/// </summary>
/// <param name="messageId">This field SHOULD be the multiplex ID that is used to associate a response with a
/// request.</param>
/// <param name="uid">This field SHOULD identify the authenticated instance of the user.</param>
/// <param name="treeId">This field identifies the subdirectory (or tree) on the server that the client is
/// accessing.</param>
/// <param name="flags">An 8-bit field of 1-bit flags describing various features in effect for the
/// message</param>
/// <param name="flags2">A 16-bit field of 1-bit flags that represent various features in effect for the
/// message. Unspecified bits are reserved and MUST be zero.</param>
/// <param name="fid">This field MUST be a valid 16-bit signed integer indicating the file from which the data
/// MUST be read.</param>
/// <param name="offset">The offset in bytes from the start of the file at which the read MUST begin. This is
/// the lower 32 bits of a 64 bit value if the WordCount is 10</param>
/// <param name="maxCountOfBytesToReturn">The requested maximum number of bytes to read from the file and
/// return to the client. The value MAY exceed the negotiated buffer size</param>
/// <param name="minCountOfBytesToReturn">The requested minimum number of bytes to read from the file and
/// return to the client. This field is used only when reading from a named pipe or a device. It is ignored
/// when reading from a standard file</param>
/// <param name="timeout">Support for this field is optional and this field is used only when reading from a
/// named pipe or i/o device.</param>
/// <param name="offsetHigh">the upper 32 bits of the offset in bytes from the start of the file at which
/// the read MUST start.</param>
/// <returns>a ReadRaw request packet</returns>
public SmbReadRawRequestPacket CreateReadRawRequest(
ushort messageId,
ushort uid,
ushort treeId,
SmbFlags flags,
SmbFlags2 flags2,
ushort fid,
uint offset,
ushort maxCountOfBytesToReturn,
ushort minCountOfBytesToReturn,
uint timeout,
uint offsetHigh)
{
SmbReadRawRequestPacket packet = new SmbReadRawRequestPacket();
packet.SmbHeader = CifsMessageUtils.CreateSmbHeader(SmbCommand.SMB_COM_READ_RAW,
messageId, uid, treeId, flags, flags2);
SMB_COM_READ_RAW_Request_SMB_Parameters smbParameters = new SMB_COM_READ_RAW_Request_SMB_Parameters();
smbParameters.FID = fid;
smbParameters.Offset = offset;
smbParameters.MaxCountOfBytesToReturn = maxCountOfBytesToReturn;
smbParameters.MinCountOfBytesToReturn = minCountOfBytesToReturn;
smbParameters.Timeout = timeout;
smbParameters.Reserved = 0;
smbParameters.OffsetHigh = offsetHigh;
smbParameters.WordCount = (byte)(Marshal.SizeOf(smbParameters) / NumBytesOfWord);
SMB_COM_READ_RAW_Request_SMB_Data smbData = new SMB_COM_READ_RAW_Request_SMB_Data();
smbData.ByteCount = 0;
packet.SmbParameters = smbParameters;
packet.SmbData = smbData;
return packet;
}
