usmDHUserKeyTable_data_access.c
上传用户:wxp200602
上传日期:2007-10-30
资源大小:4028k
文件大小:10k
源码类别:
SNMP编程
开发平台:
Unix_Linux
- /*
- * Note: this file originally auto-generated by mib2c using
- * version : 1.12 $ of : mfd-data-access.m2c,v $
- *
- * $Id: usmDHUserKeyTable_data_access.c,v 1.6.2.3 2005/01/31 06:06:08 rstory Exp $
- */
- /*
- * standard Net-SNMP includes
- */
- #include <net-snmp/net-snmp-config.h>
- #include <net-snmp/net-snmp-includes.h>
- #include <net-snmp/agent/net-snmp-agent-includes.h>
- /*
- * include our parent header
- */
- #include "usmDHUserKeyTable.h"
- #include "usmDHUserKeyTable_data_access.h"
- /** @defgroup data_access data_access: Routines to access data
- *
- * These routines are used to locate the data used to satisfy
- * requests.
- *
- * @{
- */
- /**********************************************************************
- **********************************************************************
- ***
- *** Table usmDHUserKeyTable
- ***
- **********************************************************************
- **********************************************************************/
- /*
- * usmDHUserKeyTable is subid 2 of usmDHPublicObjects.
- * Its status is Current.
- * OID: .1.3.6.1.3.101.1.1.2, length: 9
- */
- /**
- * initialization for usmDHUserKeyTable data access
- *
- * This function is called during startup to allow you to
- * allocate any resources you need for the data table.
- *
- * @param usmDHUserKeyTable_reg
- * Pointer to usmDHUserKeyTable_registration
- *
- * @retval MFD_SUCCESS : success.
- * @retval MFD_ERROR : unrecoverable error.
- */
- int
- usmDHUserKeyTable_init_data(usmDHUserKeyTable_registration_ptr
- usmDHUserKeyTable_reg)
- {
- DEBUGMSGTL(("verbose:usmDHUserKeyTable:usmDHUserKeyTable_init_data",
- "calledn"));
- /*
- * TODO:303:o: Initialize usmDHUserKeyTable data.
- */
- return MFD_SUCCESS;
- } /* usmDHUserKeyTable_init_data */
- /**
- * container-cached overview
- *
- */
- /***********************************************************************
- *
- * cache
- *
- ***********************************************************************/
- /**
- * container initialization
- *
- * @param container_ptr_ptr A pointer to a container pointer. If you
- * create a custom container, use this parameter to return it
- * to the MFD helper. If set to NULL, the MFD helper will
- * allocate a container for you.
- * @param cache A pointer to a cache structure. You can set the timeout
- * and other cache flags using this pointer.
- *
- * This function is called at startup to allow you to customize certain
- * aspects of the access method. For the most part, it is for advanced
- * users. The default code should suffice for most cases. If no custom
- * container is allocated, the MFD code will create one for your.
- *
- * This is also the place to set up cache behavior. The default, to
- * simply set the cache timeout, will work well with the default
- * container. If you are using a custom container, you may want to
- * look at the cache helper documentation to see if there are any
- * flags you want to set.
- *
- * @remark
- * This would also be a good place to do any initialization needed
- * for you data source. For example, opening a connection to another
- * process that will supply the data, opening a database, etc.
- */
- void
- usmDHUserKeyTable_container_init(netsnmp_container ** container_ptr_ptr,
- netsnmp_cache * cache)
- {
- DEBUGMSGTL(("verbose:usmDHUserKeyTable:usmDHUserKeyTable_container_init", "calledn"));
- if ((NULL == cache) || (NULL == container_ptr_ptr)) {
- snmp_log(LOG_ERR,
- "bad params to usmDHUserKeyTable_container_initn");
- return;
- }
- /*
- * For advanced users, you can use a custom container. If you
- * do not create one, one will be created for you.
- */
- *container_ptr_ptr = NULL;
- /*
- * TODO:345:A: Set up usmDHUserKeyTable cache properties.
- *
- * Also for advanced users, you can set parameters for the
- * cache. Do not change the magic pointer, as it is used
- * by the MFD helper. To completely disable caching, set
- * cache->enabled to 0.
- *
- * other tables access our data pool (usm user list), so not caching
- * is the safest thing to do. The other option would be to add a
- * callback when the list is changed, or a last changed object to
- * verify the list hasn't changed. Until then, reload the cache for
- * every request.
- */
- cache->timeout = -1; /* seconds */
- } /* usmDHUserKeyTable_container_init */
- /**
- * load cache data
- *
- * TODO:350:M: Implement usmDHUserKeyTable cache load
- *
- * @param container container to which items should be inserted
- *
- * @retval MFD_SUCCESS : success.
- * @retval MFD_RESOURCE_UNAVAILABLE : Can't access data source
- * @retval MFD_ERROR : other error.
- *
- * This function is called to cache the index(es) (and data, optionally)
- * for the every row in the data set.
- *
- * @remark
- * While loading the cache, the only important thing is the indexes.
- * If access to your data is cheap/fast (e.g. you have a pointer to a
- * structure in memory), it would make sense to update the data here.
- * If, however, the accessing the data invovles more work (e.g. parsing
- * some other existing data, or peforming calculations to derive the data),
- * then you can limit yourself to setting the indexes and saving any
- * information you will need later. Then use the saved information in
- * usmDHUserKeyTable_row_prep() for populating data.
- *
- * @note
- * If you need consistency between rows (like you want statistics
- * for each row to be from the same time frame), you should set all
- * data here.
- *
- */
- int
- usmDHUserKeyTable_cache_load(netsnmp_container * container)
- {
- usmDHUserKeyTable_rowreq_ctx *rowreq_ctx;
- struct usmUser *usmuser;
- size_t count = 0;
- DEBUGMSGTL(("verbose:usmDHUserKeyTable:usmDHUserKeyTable_cache_load",
- "calledn"));
- /*
- * TODO:351:M: |-> Load/update data in the usmDHUserKeyTable container.
- * loop over your usmDHUserKeyTable data, allocate a rowreq context,
- * set the index(es) [and data, optionally] and insert into
- * the container.
- */
- /*
- * Retrieve the first user from the USM DB
- */
- usmuser = usm_get_userList();
- if (NULL == usmuser) {
- return MFD_SUCCESS;
- }
- for (; usmuser; usmuser = usmuser->next) {
- /*
- * TODO:352:M: | |-> set indexes in new usmDHUserKeyTable rowreq context.
- * data context will be set from the param (unless NULL,
- * in which case a new data context will be allocated)
- */
- rowreq_ctx = usmDHUserKeyTable_allocate_rowreq_ctx(usmuser);
- if (NULL == rowreq_ctx) {
- snmp_log(LOG_ERR, "memory allocation failedn");
- return MFD_RESOURCE_UNAVAILABLE;
- }
- if (MFD_SUCCESS !=
- usmDHUserKeyTable_indexes_set(rowreq_ctx,
- usmuser->engineID,
- usmuser->engineIDLen,
- usmuser->name,
- strlen(usmuser->name))) {
- snmp_log(LOG_ERR,
- "error setting index while loading "
- "usmDHUserKeyTable cache.n");
- usmDHUserKeyTable_release_rowreq_ctx(rowreq_ctx);
- continue;
- }
- /*
- * TODO:352:r: | |-> populate usmDHUserKeyTable data context.
- * Populate data context here. (optionally, delay until row prep)
- */
- /*
- * non-TRANSIENT data: no need to copy. set pointer to data
- */
- /*
- * insert into table container
- */
- CONTAINER_INSERT(container, rowreq_ctx);
- ++count;
- }
- DEBUGMSGT(("verbose:usmDHUserKeyTable:usmDHUserKeyTable_cache_load",
- "inserted %d recordsn", count));
- return MFD_SUCCESS;
- } /* usmDHUserKeyTable_cache_load */
- /**
- * cache clean up
- *
- * @param container container with all current items
- *
- * This optional callback is called prior to all
- * item's being removed from the container. If you
- * need to do any processing before that, do it here.
- *
- * @note
- * The MFD helper will take care of releasing all the row contexts.
- * If you did not pass a data context pointer when allocating
- * the rowreq context, the one that was allocated will be deleted.
- * If you did pass one in, it will not be deleted and that memory
- * is your responsibility.
- *
- */
- void
- usmDHUserKeyTable_cache_free(netsnmp_container * container)
- {
- DEBUGMSGTL(("verbose:usmDHUserKeyTable:usmDHUserKeyTable_cache_free",
- "calledn"));
- /*
- * TODO:380:M: Free usmDHUserKeyTable cache.
- */
- } /* usmDHUserKeyTable_cache_free */
- /**
- * prepare row for processing.
- *
- * When the agent has located the row for a request, this function is
- * called to prepare the row for processing. If you fully populated
- * the data context during the index setup phase, you may not need to
- * do anything.
- *
- * @param rowreq_ctx pointer to a context.
- *
- * @retval MFD_SUCCESS : success.
- * @retval MFD_ERROR : other error.
- */
- int
- usmDHUserKeyTable_row_prep(usmDHUserKeyTable_rowreq_ctx * rowreq_ctx)
- {
- DEBUGMSGTL(("verbose:usmDHUserKeyTable:usmDHUserKeyTable_row_prep",
- "calledn"));
- netsnmp_assert(NULL != rowreq_ctx);
- /*
- * TODO:390:o: Prepare row for request.
- * If populating row data was delayed, this is the place to
- * fill in the row for this request.
- */
- return MFD_SUCCESS;
- } /* usmDHUserKeyTable_row_prep */
- /** @} */