mirror of
https://github.com/TalAloni/SMBLibrary.git
synced 2025-05-17 09:57:10 +02:00
Refactored ReadWriteResponseHelper
This commit is contained in:
Tal Aloni
parent
2049be2220
commit
d42240ffa1
1 changed files with 76 additions and 73 deletions
|
|
@ -19,10 +19,17 @@ namespace SMBLibrary.Server.SMB1
|
|||
{
|
||||
internal static SMB1Command GetReadResponse(SMB1Header header, ReadRequest request, ISMBShare share, SMB1ConnectionState state)
|
||||
{
|
||||
byte[] data = PerformRead(header, share, request.FID, request.ReadOffsetInBytes, request.CountOfBytesToRead, state);
|
||||
OpenedFileObject openedFile = state.GetOpenedFileObject(request.FID);
|
||||
if (openedFile == null)
|
||||
{
|
||||
header.Status = NTStatus.STATUS_INVALID_HANDLE;
|
||||
return null;
|
||||
}
|
||||
byte[] data;
|
||||
header.Status = ReadFile(out data, openedFile, request.ReadOffsetInBytes, request.CountOfBytesToRead, state);
|
||||
if (header.Status != NTStatus.STATUS_SUCCESS)
|
||||
{
|
||||
return new ErrorResponse(CommandName.SMB_COM_READ);
|
||||
return new ErrorResponse(request.CommandName);
|
||||
}
|
||||
|
||||
ReadResponse response = new ReadResponse();
|
||||
|
|
@ -33,15 +40,22 @@ namespace SMBLibrary.Server.SMB1
|
|||
|
||||
internal static SMB1Command GetReadResponse(SMB1Header header, ReadAndXRequest request, ISMBShare share, SMB1ConnectionState state)
|
||||
{
|
||||
OpenedFileObject openedFile = state.GetOpenedFileObject(request.FID);
|
||||
if (openedFile == null)
|
||||
{
|
||||
header.Status = NTStatus.STATUS_INVALID_HANDLE;
|
||||
return null;
|
||||
}
|
||||
uint maxCount = request.MaxCount;
|
||||
if ((share is FileSystemShare) && state.LargeRead)
|
||||
{
|
||||
maxCount = request.MaxCountLarge;
|
||||
}
|
||||
byte[] data = PerformRead(header, share, request.FID, request.Offset, maxCount, state);
|
||||
byte[] data;
|
||||
header.Status = ReadFile(out data, openedFile, (long)request.Offset, (int)maxCount, state);
|
||||
if (header.Status != NTStatus.STATUS_SUCCESS)
|
||||
{
|
||||
return new ErrorResponse(CommandName.SMB_COM_READ_ANDX);
|
||||
return new ErrorResponse(request.CommandName);
|
||||
}
|
||||
|
||||
ReadAndXResponse response = new ReadAndXResponse();
|
||||
|
|
@ -54,47 +68,31 @@ namespace SMBLibrary.Server.SMB1
|
|||
return response;
|
||||
}
|
||||
|
||||
public static byte[] PerformRead(SMB1Header header, ISMBShare share, ushort FID, ulong offset, uint maxCount, SMB1ConnectionState state)
|
||||
public static NTStatus ReadFile(out byte[] data, OpenedFileObject openedFile, long offset, int maxCount, ConnectionState state)
|
||||
{
|
||||
if (offset > Int64.MaxValue || maxCount > Int32.MaxValue)
|
||||
{
|
||||
throw new NotImplementedException("Underlying filesystem does not support unsigned offset / read count");
|
||||
}
|
||||
return PerformRead(header, share, FID, (long)offset, (int)maxCount, state);
|
||||
}
|
||||
|
||||
public static byte[] PerformRead(SMB1Header header, ISMBShare share, ushort FID, long offset, int maxCount, SMB1ConnectionState state)
|
||||
{
|
||||
OpenedFileObject openedFile = state.GetOpenedFileObject(FID);
|
||||
if (openedFile == null)
|
||||
{
|
||||
header.Status = NTStatus.STATUS_INVALID_HANDLE;
|
||||
return null;
|
||||
}
|
||||
data = null;
|
||||
string openedFilePath = openedFile.Path;
|
||||
Stream stream = openedFile.Stream;
|
||||
if (share is NamedPipeShare)
|
||||
if (stream is RPCPipeStream)
|
||||
{
|
||||
byte[] data = new byte[maxCount];
|
||||
data = new byte[maxCount];
|
||||
int bytesRead = stream.Read(data, 0, maxCount);
|
||||
if (bytesRead < maxCount)
|
||||
{
|
||||
// EOF, we must trim the response data array
|
||||
data = ByteReader.ReadBytes(data, 0, bytesRead);
|
||||
}
|
||||
return data;
|
||||
return NTStatus.STATUS_SUCCESS;
|
||||
}
|
||||
else // FileSystemShare
|
||||
else // File
|
||||
{
|
||||
|
||||
if (stream == null)
|
||||
{
|
||||
header.Status = NTStatus.STATUS_ACCESS_DENIED;
|
||||
return null;
|
||||
state.LogToServer(Severity.Debug, "ReadFile: Cannot read '{0}', Invalid Operation.", openedFilePath);
|
||||
return NTStatus.STATUS_ACCESS_DENIED;
|
||||
}
|
||||
|
||||
int bytesRead;
|
||||
byte[] data;
|
||||
try
|
||||
{
|
||||
stream.Seek(offset, SeekOrigin.Begin);
|
||||
|
|
@ -107,28 +105,24 @@ namespace SMBLibrary.Server.SMB1
|
|||
if (errorCode == (ushort)Win32Error.ERROR_SHARING_VIOLATION)
|
||||
{
|
||||
// Returning STATUS_SHARING_VIOLATION is undocumented but apparently valid
|
||||
state.LogToServer(Severity.Debug, "ReadAndX: Cannot read '{0}'. Sharing Violation.", openedFilePath);
|
||||
header.Status = NTStatus.STATUS_SHARING_VIOLATION;
|
||||
return null;
|
||||
state.LogToServer(Severity.Debug, "ReadFile: Cannot read '{0}'. Sharing Violation.", openedFilePath);
|
||||
return NTStatus.STATUS_SHARING_VIOLATION;
|
||||
}
|
||||
else
|
||||
{
|
||||
state.LogToServer(Severity.Debug, "ReadAndX: Cannot read '{0}'. Data Error.", openedFilePath);
|
||||
header.Status = NTStatus.STATUS_DATA_ERROR;
|
||||
return null;
|
||||
state.LogToServer(Severity.Debug, "ReadFile: Cannot read '{0}'. Data Error.", openedFilePath);
|
||||
return NTStatus.STATUS_DATA_ERROR;
|
||||
}
|
||||
}
|
||||
catch (ArgumentOutOfRangeException)
|
||||
{
|
||||
state.LogToServer(Severity.Debug, "ReadAndX: Cannot read '{0}'. Offset Out Of Range.", openedFilePath);
|
||||
header.Status = NTStatus.STATUS_DATA_ERROR;
|
||||
return null;
|
||||
state.LogToServer(Severity.Debug, "ReadFile: Cannot read '{0}'. Offset Out Of Range.", openedFilePath);
|
||||
return NTStatus.STATUS_DATA_ERROR;
|
||||
}
|
||||
catch (UnauthorizedAccessException)
|
||||
{
|
||||
state.LogToServer(Severity.Debug, "ReadAndX: Cannot read '{0}', Access Denied.", openedFilePath);
|
||||
header.Status = NTStatus.STATUS_ACCESS_DENIED;
|
||||
return null;
|
||||
state.LogToServer(Severity.Debug, "ReadFile: Cannot read '{0}', Access Denied.", openedFilePath);
|
||||
return NTStatus.STATUS_ACCESS_DENIED;
|
||||
}
|
||||
|
||||
if (bytesRead < maxCount)
|
||||
|
|
@ -136,33 +130,45 @@ namespace SMBLibrary.Server.SMB1
|
|||
// EOF, we must trim the response data array
|
||||
data = ByteReader.ReadBytes(data, 0, bytesRead);
|
||||
}
|
||||
return data;
|
||||
return NTStatus.STATUS_SUCCESS;
|
||||
}
|
||||
}
|
||||
|
||||
internal static SMB1Command GetWriteResponse(SMB1Header header, WriteRequest request, ISMBShare share, SMB1ConnectionState state)
|
||||
{
|
||||
ushort bytesWritten = (ushort)PerformWrite(header, share, request.FID, request.WriteOffsetInBytes, request.Data, state);
|
||||
OpenedFileObject openedFile = state.GetOpenedFileObject(request.FID);
|
||||
if (openedFile == null)
|
||||
{
|
||||
header.Status = NTStatus.STATUS_INVALID_HANDLE;
|
||||
return new ErrorResponse(request.CommandName);
|
||||
}
|
||||
int numberOfBytesWritten;
|
||||
header.Status = WriteFile(out numberOfBytesWritten, openedFile, request.WriteOffsetInBytes, request.Data, state);
|
||||
if (header.Status != NTStatus.STATUS_SUCCESS)
|
||||
{
|
||||
return new ErrorResponse(CommandName.SMB_COM_WRITE_ANDX);
|
||||
return new ErrorResponse(request.CommandName);
|
||||
}
|
||||
WriteResponse response = new WriteResponse();
|
||||
response.CountOfBytesWritten = bytesWritten;
|
||||
|
||||
response.CountOfBytesWritten = (ushort)numberOfBytesWritten;
|
||||
return response;
|
||||
}
|
||||
|
||||
internal static SMB1Command GetWriteResponse(SMB1Header header, WriteAndXRequest request, ISMBShare share, SMB1ConnectionState state)
|
||||
{
|
||||
uint bytesWritten = PerformWrite(header, share, request.FID, request.Offset, request.Data, state);
|
||||
OpenedFileObject openedFile = state.GetOpenedFileObject(request.FID);
|
||||
if (openedFile == null)
|
||||
{
|
||||
header.Status = NTStatus.STATUS_INVALID_HANDLE;
|
||||
return new ErrorResponse(request.CommandName);
|
||||
}
|
||||
int numberOfBytesWritten;
|
||||
header.Status = WriteFile(out numberOfBytesWritten, openedFile, (long)request.Offset, request.Data, state);
|
||||
if (header.Status != NTStatus.STATUS_SUCCESS)
|
||||
{
|
||||
return new ErrorResponse(CommandName.SMB_COM_WRITE_ANDX);
|
||||
return new ErrorResponse(request.CommandName);
|
||||
}
|
||||
WriteAndXResponse response = new WriteAndXResponse();
|
||||
response.Count = bytesWritten;
|
||||
|
||||
response.Count = (uint)numberOfBytesWritten;
|
||||
if (share is FileSystemShare)
|
||||
{
|
||||
// If the client wrote to a disk file, this field MUST be set to 0xFFFF.
|
||||
|
|
@ -171,65 +177,62 @@ namespace SMBLibrary.Server.SMB1
|
|||
return response;
|
||||
}
|
||||
|
||||
public static uint PerformWrite(SMB1Header header, ISMBShare share, ushort FID, ulong offset, byte[] data, SMB1ConnectionState state)
|
||||
public static NTStatus WriteFile(out int numberOfBytesWritten, OpenedFileObject openedFile, long offset, byte[] data, ConnectionState state)
|
||||
{
|
||||
OpenedFileObject openedFile = state.GetOpenedFileObject(FID);
|
||||
if (openedFile == null)
|
||||
{
|
||||
header.Status = NTStatus.STATUS_INVALID_HANDLE;
|
||||
return 0;
|
||||
}
|
||||
numberOfBytesWritten = 0;
|
||||
string openedFilePath = openedFile.Path;
|
||||
Stream stream = openedFile.Stream;
|
||||
if (share is NamedPipeShare)
|
||||
if (stream is RPCPipeStream)
|
||||
{
|
||||
stream.Write(data, 0, data.Length);
|
||||
return (uint)data.Length;
|
||||
numberOfBytesWritten = data.Length;
|
||||
return NTStatus.STATUS_SUCCESS;
|
||||
}
|
||||
else // FileSystemShare
|
||||
else // File
|
||||
{
|
||||
if (stream == null)
|
||||
{
|
||||
header.Status = NTStatus.STATUS_ACCESS_DENIED;
|
||||
return 0;
|
||||
state.LogToServer(Severity.Debug, "WriteFile: Cannot write '{0}'. Invalid Operation.", openedFilePath);
|
||||
return NTStatus.STATUS_ACCESS_DENIED;
|
||||
}
|
||||
|
||||
try
|
||||
{
|
||||
stream.Seek((long)offset, SeekOrigin.Begin);
|
||||
stream.Seek(offset, SeekOrigin.Begin);
|
||||
stream.Write(data, 0, data.Length);
|
||||
return (uint)data.Length;
|
||||
numberOfBytesWritten = data.Length;
|
||||
return NTStatus.STATUS_SUCCESS;
|
||||
}
|
||||
catch (IOException ex)
|
||||
{
|
||||
ushort errorCode = IOExceptionHelper.GetWin32ErrorCode(ex);
|
||||
if (errorCode == (ushort)Win32Error.ERROR_DISK_FULL)
|
||||
{
|
||||
header.Status = NTStatus.STATUS_DISK_FULL;
|
||||
return 0;
|
||||
state.LogToServer(Severity.Debug, "WriteFile: Cannot write '{0}'. Disk Full.", openedFilePath);
|
||||
return NTStatus.STATUS_DISK_FULL;
|
||||
}
|
||||
else if (errorCode == (ushort)Win32Error.ERROR_SHARING_VIOLATION)
|
||||
{
|
||||
state.LogToServer(Severity.Debug, "WriteFile: Cannot write '{0}'. Sharing Violation.", openedFilePath);
|
||||
// Returning STATUS_SHARING_VIOLATION is undocumented but apparently valid
|
||||
header.Status = NTStatus.STATUS_SHARING_VIOLATION;
|
||||
return 0;
|
||||
return NTStatus.STATUS_SHARING_VIOLATION;
|
||||
}
|
||||
else
|
||||
{
|
||||
header.Status = NTStatus.STATUS_DATA_ERROR;
|
||||
return 0;
|
||||
state.LogToServer(Severity.Debug, "WriteFile: Cannot write '{0}'. Data Error.", openedFilePath);
|
||||
return NTStatus.STATUS_DATA_ERROR;
|
||||
}
|
||||
}
|
||||
catch (ArgumentOutOfRangeException)
|
||||
{
|
||||
header.Status = NTStatus.STATUS_DATA_ERROR;
|
||||
return 0;
|
||||
state.LogToServer(Severity.Debug, "WriteFile: Cannot write '{0}'. Offset Out Of Range.", openedFilePath);
|
||||
return NTStatus.STATUS_DATA_ERROR;
|
||||
}
|
||||
catch (UnauthorizedAccessException)
|
||||
{
|
||||
state.LogToServer(Severity.Debug, "WriteFile: Cannot write '{0}'. Access Denied.", openedFilePath);
|
||||
// The user may have tried to write to a readonly file
|
||||
header.Status = NTStatus.STATUS_ACCESS_DENIED;
|
||||
return 0;
|
||||
return NTStatus.STATUS_ACCESS_DENIED;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue