/// <summary>
/// May return an empty list
/// </summary>
private List <SMB1Command> ProcessSMB1Command(SMB1Header header, SMB1Command command, ref ConnectionState state)
{
if (state.Dialect == SMBDialect.NotSet)
{
if (command is NegotiateRequest)
{
NegotiateRequest request = (NegotiateRequest)command;
if (request.Dialects.Contains(SMBServer.NTLanManagerDialect))
{
state = new SMB1ConnectionState(state);
state.Dialect = SMBDialect.NTLM012;
m_connectionManager.AddConnection(state);
if (EnableExtendedSecurity && header.ExtendedSecurityFlag)
{
return(NegotiateHelper.GetNegotiateResponseExtended(request, m_serverGuid));
}
else
{
return(NegotiateHelper.GetNegotiateResponse(header, request, m_securityProvider, state));
}
}
else
{
return(new NegotiateResponseNotSupported());
}
}
else
{
// [MS-CIFS] An SMB_COM_NEGOTIATE exchange MUST be completed before any other SMB messages are sent to the server
header.Status = NTStatus.STATUS_INVALID_SMB;
return(new ErrorResponse(command.CommandName));
}
}
else if (command is NegotiateRequest)
{
// There MUST be only one SMB_COM_NEGOTIATE exchange per SMB connection.
// Subsequent SMB_COM_NEGOTIATE requests received by the server MUST be rejected with error responses.
header.Status = NTStatus.STATUS_INVALID_SMB;
return(new ErrorResponse(command.CommandName));
}
else
{
return(ProcessSMB1Command(header, command, (SMB1ConnectionState)state));
}
}
/// <summary>
/// May return null
/// </summary>
private SMB2Command ProcessSMB2Command(SMB2Command command, ref ConnectionState state)
{
if (state.Dialect == SMBDialect.NotSet)
{
if (command is NegotiateRequest)
{
NegotiateRequest request = (NegotiateRequest)command;
SMB2Command response = NegotiateHelper.GetNegotiateResponse(request, m_securityProvider, state, m_serverGuid, m_serverStartTime);
if (state.Dialect != SMBDialect.NotSet)
{
state = new SMB2ConnectionState(state);
m_connectionManager.AddConnection(state);
}
return(response);
}
else
{
// [MS-SMB2] If the request being received is not an SMB2 NEGOTIATE Request [..]
// and Connection.NegotiateDialect is 0xFFFF or 0x02FF, the server MUST
// disconnect the connection.
state.LogToServer(Severity.Debug, "Invalid Connection State for command {0}", command.CommandName.ToString());
state.ClientSocket.Close();
return(null);
}
}
else if (command is NegotiateRequest)
{
// [MS-SMB2] If Connection.NegotiateDialect is 0x0202, 0x0210, 0x0300, 0x0302, or 0x0311,
// the server MUST disconnect the connection.
state.LogToServer(Severity.Debug, "Rejecting NegotiateRequest. NegotiateDialect is already set");
state.ClientSocket.Close();
return(null);
}
else
{
return(ProcessSMB2Command(command, (SMB2ConnectionState)state));
}
}