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lcd_time.h
资源名称：net-snmp-5.2.2.rar　[点击查看]
上传用户：wxp200602
上传日期：2007-10-30
资源大小：4028k
文件大小：4k
源码类别：

SNMP编程

开发平台：

Unix_Linux

lcd_time.h：源码内容
  1. /*
  2.  * lcd_time.h
  3.  */
  5. #ifndef _LCD_TIME_H
  6. #define _LCD_TIME_H
  8. #ifdef __cplusplus
  9. extern          "C" {
  10. #endif
  13.     /*
  14.      * undefine to enable time synchronization only on authenticated packets 
  15.      */
  16. #define LCD_TIME_SYNC_OPT 1
  18.     /*
  19.      * Macros and definitions.
  20.      */
  21. #define ETIMELIST_SIZE 23
  25.     typedef struct enginetime_struct {
  26.         u_char         *engineID;
  27.         u_int           engineID_len;
  29.         u_int           engineTime;
  30.         u_int           engineBoot;
  31.         /*
  32.          * Time & boots values received from last authenticated
  33.          * *   message within the previous time window.
  34.          */
  36.         time_t          lastReceivedEngineTime;
  37.         /*
  38.          * Timestamp made when engineTime/engineBoots was last
  39.          * *   updated.  Measured in seconds.
  40.          */
  42. #ifdef LCD_TIME_SYNC_OPT
  43.         u_int           authenticatedFlag;
  44. #endif
  45.         struct enginetime_struct *next;
  46.     } enginetime   , *Enginetime;
  51.     /*
  52.      * Macros for streamlined engineID existence checks --
  53.      *
  54.      *      e       is char *engineID,
  55.      *      e_l     is u_int engineID_len.
  56.      *
  57.      *
  58.      *  ISENGINEKNOWN(e, e_l)
  59.      *      Returns:
  60.      *              TRUE    If engineID is recoreded in the EngineID List;
  61.      *              FALSE   Otherwise.
  62.      *
  63.      *  ENSURE_ENGINE_RECORD(e, e_l)
  64.      *      Adds the given engineID to the EngineID List if it does not exist
  65.      *              already.  engineID is added with a <enginetime, engineboots>
  66.      *              tuple of <0,0>.  ALWAYS succeeds -- except in case of a
  67.      *              fatal internal error.
  68.      *      Returns:
  69.      *              SNMPERR_SUCCESS On success;
  70.      *              SNMPERR_GENERR  Otherwise.
  71.      *
  72.      *  MAKENEW_ENGINE_RECORD(e, e_l)
  73.      *      Returns:
  74.      *              SNMPERR_SUCCESS If engineID already exists in the EngineID List;
  75.      *              SNMPERR_GENERR  Otherwise -and- invokes ENSURE_ENGINE_RECORD()
  76.      *                                      to add an entry to the EngineID List.
  77.      *
  78.      * XXX  Requres the following declaration in modules calling ISENGINEKNOWN():
  79.      *      static u_int    dummy_etime, dummy_eboot;
  80.      */
  81. #define ISENGINEKNOWN(e, e_l)
  82. ( (get_enginetime(e, e_l,
  83. &dummy_eboot, &dummy_etime, TRUE) == SNMPERR_SUCCESS)
  84. ? TRUE
  85. : FALSE )
  87. #define ENSURE_ENGINE_RECORD(e, e_l)
  88. ( (set_enginetime(e, e_l, 0, 0, FALSE) == SNMPERR_SUCCESS)
  89. ? SNMPERR_SUCCESS
  90. : SNMPERR_GENERR )
  92. #define MAKENEW_ENGINE_RECORD(e, e_l)
  93. ( (ISENGINEKNOWN(e, e_l) == TRUE)
  94. ? SNMPERR_SUCCESS
  95. : (ENSURE_ENGINE_RECORD(e, e_l), SNMPERR_GENERR) )
  99.     /*
  100.      * Prototypes.
  101.      */
  102.     int             get_enginetime(u_char * engineID, u_int engineID_len,
  103.                                    u_int * engine_boot,
  104.                                    u_int * engine_time,
  105.                                    u_int authenticated);
  107.     int             get_enginetime_ex(u_char * engineID,
  108.                                       u_int engineID_len,
  109.                                       u_int * engine_boot,
  110.                                       u_int * engine_time,
  111.                                       u_int * last_engine_time,
  112.                                       u_int authenticated);
  114.     int             set_enginetime(u_char * engineID, u_int engineID_len,
  115.                                    u_int engine_boot, u_int engine_time,
  116.                                    u_int authenticated);
  118.          
  119.          
  120.          
  121.          
  122.          
  123.          
  124.         Enginetime
  125.         search_enginetime_list(u_char * engineID, u_int engineID_len);
  127.     int             hash_engineID(u_char * engineID, u_int engineID_len);
  129.     void            dump_etimelist_entry(Enginetime e, int count);
  130.     void            dump_etimelist(void);
  131.     void            free_enginetime(unsigned char *engineID, size_t engineID_len);
  133. #ifdef __cplusplus
  134. }
  135. #endif
  136. #endif                          /* _LCD_TIME_H */