security.h

u盘MCU端源代码,开发U盘的可以参考.

/*============================================================================
  ____________________________________________________________________________
                                ______________________________________________
   SSSS  M   M          CCCC          Standard Microsystems Corporation
  S      MM MM   SSSS  C                    Austin Design Center
   SSS   M M M  S      C                 11000 N. Mopac Expressway
      S  M   M   SSS   C                Stonelake Bldg. 6, Suite 500
  SSSS   M   M      S   CCCC                Austin, Texas 78759
                SSSS            ______________________________________________
  ____________________________________________________________________________

  Copyright(C) 1999, Standard Microsystems Corporation
  All Rights Reserved.

  This program code listing is proprietary to SMSC and may not be copied,
  distributed, or used without a license to do so.  Such license may have
  Limited or Restricted Rights. Please refer to the license for further
  clarification.
  ____________________________________________________________________________

  Notice: The program contained in this listing is a proprietary trade
  secret of SMSC, Hauppauge, New York, and is copyrighted
  under the United States Copyright Act of 1976 as an unpublished work,
  pursuant to Section 104 and Section 408 of Title XVII of the United
  States code. Unauthorized copying, adaption, distribution, use, or
  display is prohibited by this law.
  ____________________________________________________________________________

  Use, duplication, or disclosure by the Government is subject to
  restrictions as set forth in subparagraph(c)(1)(ii) of the Rights
  in Technical Data and Computer Software clause at DFARS 52.227-7013.
  Contractor/Manufacturer is Standard Microsystems Corporation,
  80 Arkay Drive, Hauppauge, New York, 1178-8847.
  ____________________________________________________________________________
  ____________________________________________________________________________

  security.h - the device manager implementarion
  ____________________________________________________________________________


  in this function, process all password-related cbs in one function to avoid accidentally 
  exposes functionality through export symbols

  at end of function, we must somehow let caller know if we've dispatched the cb or not.
  in addition, this code must be isr agnostic, and cannot be a dfa, since the cb may or may
  not be a high-priority cb.  (high priority cb's must process the security cb, but don't
  actually make a dfa call to dispatch the cb, therefore we can't issue a dfa call here or
  else we'll negate that optimization)
  ____________________________________________________________________________

  Revision History
  Date      Who  Comment
  ________  ___  _____________________________________________________________
  10/07/02  cds  initial version
  10/17/02  cds  - new macro: _sec_is_password_validated() moved to security.h from lun.h
                 - project-wide lun data & vtbl paging to reduce code space.           
                 - removed g_active_media from _lun_data, _lun_() virtual functions    
                 - added _lun_data_rd() and _lun_data_wr() macros to bypass lun paging 
                 - added lun_set_active(log_lun) function to switch luns               
 ===========================================================================*/

// macro to check if password has been validated
#define _sec_is_password_validated()            ((g_password_validated)?k_true:k_false)

//+-----------------------------------------------------------------------------
// Name:
//   sec_process_cb
//
// Declaration:
//   void dfa_lun_write(void);
//
// Purpose:
//   security SCSI CB hook.  This function is called before any other CBs
//   are notified of a CBW, including read/writes.  This function is 
//   interrupt safe.
//
// Arguments:
//   None.
//   Uses _lun_data and g_bot_cbw to get its parameters.
//   Uses _result to store pass/fail status.
//
// Return:
//   k_success:  cb has been fully processed... do not propogate processing
//     on exit the DFA's argument pointer is written with a t_csw_status indicating:
//     k_command_passed - command completed.
//     k_command_failed - an error occurred.
//
//   k_ignored:  cb ignored.  It should be sent on to the default lun processing.  
//
// Notes:
//   This is a function, not a dfa
//   This function is interrupt-safe.  
//
// Since:
//   fmc-1.0
//------------------------------------------------------------------------------
extern t_result sec_process_cb() reentrant;

// global bit to indicate if password has been validated or not
extern bit g_password_validated;