/// <summary>
/// May return null
/// </summary>
public SMBCommand ProcessCommand(SMBHeader header, SMBCommand command, StateObject state, List <SMBCommand> sendQueue)
{
if (command is NegotiateRequest)
{
NegotiateRequest request = (NegotiateRequest)command;
if (request.Dialects.Contains(SMBServer.NTLanManagerDialect))
{
if (EnableExtendedSecurity && header.ExtendedSecurityFlag)
{
return(NegotiateHelper.GetNegotiateResponseExtended(request, m_serverGuid));
}
else
{
return(new NegotiateResponseNotSupported());
}
}
else
{
return(new NegotiateResponseNotSupported());
}
}
else if (command is SessionSetupAndXRequest)
{
SessionSetupAndXRequest request = (SessionSetupAndXRequest)command;
state.MaxBufferSize = request.MaxBufferSize;
//this probably won't work
return(NegotiateHelper.GetSessionSetupResponse(header, request, state));
}
else if (command is SessionSetupAndXRequestExtended)
{
SessionSetupAndXRequestExtended request = (SessionSetupAndXRequestExtended)command;
state.MaxBufferSize = request.MaxBufferSize;
return(NegotiateHelper.GetSessionSetupResponseExtended(header, request, state));
}
else if (command is EchoRequest)
{
return(ServerResponseHelper.GetEchoResponse((EchoRequest)command, sendQueue));
}
else if (state.IsAuthenticated(header.UID))
{
if (command is TreeConnectAndXRequest)
{
TreeConnectAndXRequest request = (TreeConnectAndXRequest)command;
return(TreeConnectHelper.GetTreeConnectResponse(header, request, state, m_shares));
}
else if (command is LogoffAndXRequest)
{
return(new LogoffAndXResponse());
}
else if (state.IsTreeConnected(header.TID))
{
string rootPath = state.GetConnectedTreePath(header.TID);
object share;
if (state.IsIPC(header.TID))
{
share = m_services;
}
else
{
share = m_shares.GetShareFromRelativePath(rootPath);
}
if (command is CreateDirectoryRequest)
{
if (!(share is FileSystemShare))
{
header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
return(new ErrorResponse(command.CommandName));
}
CreateDirectoryRequest request = (CreateDirectoryRequest)command;
return(FileSystemResponseHelper.GetCreateDirectoryResponse(header, request, (FileSystemShare)share, state));
}
else if (command is DeleteDirectoryRequest)
{
if (!(share is FileSystemShare))
{
header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
return(new ErrorResponse(command.CommandName));
}
DeleteDirectoryRequest request = (DeleteDirectoryRequest)command;
return(FileSystemResponseHelper.GetDeleteDirectoryResponse(header, request, (FileSystemShare)share, state));
}
else if (command is CloseRequest)
{
CloseRequest request = (CloseRequest)command;
return(ServerResponseHelper.GetCloseResponse(header, request, state));
}
else if (command is FlushRequest)
{
return(new FlushResponse());
}
else if (command is DeleteRequest)
{
if (!(share is FileSystemShare))
{
header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
return(new ErrorResponse(command.CommandName));
}
DeleteRequest request = (DeleteRequest)command;
return(FileSystemResponseHelper.GetDeleteResponse(header, request, (FileSystemShare)share, state));
}
else if (command is RenameRequest)
{
if (!(share is FileSystemShare))
{
header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
return(new ErrorResponse(command.CommandName));
}
RenameRequest request = (RenameRequest)command;
return(FileSystemResponseHelper.GetRenameResponse(header, request, (FileSystemShare)share, state));
}
else if (command is QueryInformationRequest)
{
if (!(share is FileSystemShare))
{
header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
return(new ErrorResponse(command.CommandName));
}
QueryInformationRequest request = (QueryInformationRequest)command;
return(FileSystemResponseHelper.GetQueryInformationResponse(header, request, (FileSystemShare)share));
}
else if (command is SetInformationRequest)
{
if (!(share is FileSystemShare))
{
header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
return(new ErrorResponse(command.CommandName));
}
SetInformationRequest request = (SetInformationRequest)command;
return(FileSystemResponseHelper.GetSetInformationResponse(header, request, (FileSystemShare)share, state));
}
else if (command is ReadRequest)
{
ReadRequest request = (ReadRequest)command;
return(ReadWriteResponseHelper.GetReadResponse(header, request, share, state));
}
else if (command is WriteRequest)
{
string userName = state.GetConnectedUserName(header.UID);
if (share is FileSystemShare && !((FileSystemShare)share).HasWriteAccess(userName))
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(new ErrorResponse(command.CommandName));
}
WriteRequest request = (WriteRequest)command;
return(ReadWriteResponseHelper.GetWriteResponse(header, request, share, state));
}
else if (command is CheckDirectoryRequest)
{
if (!(share is FileSystemShare))
{
header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
return(new ErrorResponse(command.CommandName));
}
CheckDirectoryRequest request = (CheckDirectoryRequest)command;
return(FileSystemResponseHelper.GetCheckDirectoryResponse(header, request, (FileSystemShare)share));
}
else if (command is WriteRawRequest)
{
// [MS-CIFS] 3.3.5.26 - Receiving an SMB_COM_WRITE_RAW Request:
// the server MUST verify that the Server.Capabilities include CAP_RAW_MODE,
// If an error is detected [..] the Write Raw operation MUST fail and
// the server MUST return a Final Server Response [..] with the Count field set to zero.
return(new WriteRawFinalResponse());
}
else if (command is SetInformation2Request)
{
if (!(share is FileSystemShare))
{
header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
return(new ErrorResponse(command.CommandName));
}
SetInformation2Request request = (SetInformation2Request)command;
return(FileSystemResponseHelper.GetSetInformation2Response(header, request, (FileSystemShare)share, state));
}
else if (command is LockingAndXRequest)
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(new ErrorResponse(CommandName.SMB_COM_LOCKING_ANDX));
}
else if (command is OpenAndXRequest)
{
OpenAndXRequest request = (OpenAndXRequest)command;
return(OpenAndXHelper.GetOpenAndXResponse(header, request, share, state));
}
else if (command is ReadAndXRequest)
{
ReadAndXRequest request = (ReadAndXRequest)command;
return(ReadWriteResponseHelper.GetReadResponse(header, request, share, state));
}
else if (command is WriteAndXRequest)
{
string userName = state.GetConnectedUserName(header.UID);
if (share is FileSystemShare && !((FileSystemShare)share).HasWriteAccess(userName))
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(new ErrorResponse(command.CommandName));
}
WriteAndXRequest request = (WriteAndXRequest)command;
return(ReadWriteResponseHelper.GetWriteResponse(header, request, share, state));
}
else if (command is FindClose2Request)
{
return(ServerResponseHelper.GetFindClose2Request(header, (FindClose2Request)command, state));
}
else if (command is TreeDisconnectRequest)
{
TreeDisconnectRequest request = (TreeDisconnectRequest)command;
return(TreeConnectHelper.GetTreeDisconnectResponse(header, request, state));
}
else if (command is TransactionRequest) // Both TransactionRequest and Transaction2Request
{
TransactionRequest request = (TransactionRequest)command;
try
{
return(TransactionHelper.GetTransactionResponse(header, request, share, state, sendQueue));
}
catch (UnsupportedInformationLevelException)
{
header.Status = NTStatus.STATUS_INVALID_PARAMETER;
return(new ErrorResponse(command.CommandName));
}
}
else if (command is TransactionSecondaryRequest) // Both TransactionSecondaryRequest and Transaction2SecondaryRequest
{
TransactionSecondaryRequest request = (TransactionSecondaryRequest)command;
try
{
return(TransactionHelper.GetTransactionResponse(header, request, share, state, sendQueue));
}
catch (UnsupportedInformationLevelException)
{
header.Status = NTStatus.STATUS_INVALID_PARAMETER;
return(new ErrorResponse(command.CommandName));
}
}
else if (command is NTTransactRequest)
{
NTTransactRequest request = (NTTransactRequest)command;
return(NTTransactHelper.GetNTTransactResponse(header, request, share, state, sendQueue));
}
else if (command is NTTransactSecondaryRequest)
{
NTTransactSecondaryRequest request = (NTTransactSecondaryRequest)command;
return(NTTransactHelper.GetNTTransactResponse(header, request, share, state, sendQueue));
}
else if (command is NTCreateAndXRequest)
{
NTCreateAndXRequest request = (NTCreateAndXRequest)command;
return(NTCreateHelper.GetNTCreateResponse(header, request, share, state));
}
}
else
{
header.Status = NTStatus.STATUS_SMB_BAD_TID;
return(new ErrorResponse(command.CommandName));
}
}
header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
return(new ErrorResponse(command.CommandName));
}