/** * add new entry */ static void _add_new_entry(netsnmp_defaultrouter_entry *defaultrouter_entry, netsnmp_container *container) { ipDefaultRouterTable_rowreq_ctx *rowreq_ctx; DEBUGMSGTL(("ipDefaultRouterTable:access", "creating new entry\n")); netsnmp_assert(NULL != defaultrouter_entry); netsnmp_assert(NULL != container); /* * allocate an row context and set the index(es) */ rowreq_ctx = ipDefaultRouterTable_allocate_rowreq_ctx(defaultrouter_entry, NULL); if ((NULL != rowreq_ctx) && (MFD_SUCCESS == ipDefaultRouterTable_indexes_set(rowreq_ctx, defaultrouter_entry->dr_addresstype, defaultrouter_entry->dr_address, defaultrouter_entry->dr_address_len, defaultrouter_entry->dr_if_index))) { if (CONTAINER_INSERT(container, rowreq_ctx) < 0) { DEBUGMSGTL(("ipAddressTable:access", "container insert failed for new entry\n")); ipDefaultRouterTable_release_rowreq_ctx(rowreq_ctx); return; } } else { if (NULL != rowreq_ctx) { snmp_log(LOG_ERR, "error setting index while loading " "ipDefaultRouterTable cache.\n"); ipDefaultRouterTable_release_rowreq_ctx(rowreq_ctx); } else { snmp_log(LOG_ERR, "memory allocation failed while loading " "ipDefaultRouterTable cache.\n"); netsnmp_access_defaultrouter_entry_free(defaultrouter_entry); } return; } }
/** * @internal */ static void _container_item_free(ipDefaultRouterTable_rowreq_ctx * rowreq_ctx, void *context) { DEBUGMSGTL(("internal:ipDefaultRouterTable:_container_item_free", "called\n")); if (NULL == rowreq_ctx) return; ipDefaultRouterTable_release_rowreq_ctx(rowreq_ctx); } /* _container_item_free */
/* ********************************************************************* * @internal * allocate resources for a ipDefaultRouterTable_rowreq_ctx */ ipDefaultRouterTable_rowreq_ctx * ipDefaultRouterTable_allocate_rowreq_ctx(ipDefaultRouterTable_data * data, void *user_init_ctx) { ipDefaultRouterTable_rowreq_ctx *rowreq_ctx = SNMP_MALLOC_TYPEDEF(ipDefaultRouterTable_rowreq_ctx); DEBUGMSGTL(("internal:ipDefaultRouterTable:ipDefaultRouterTable_allocate_rowreq_ctx", "called\n")); if (NULL == rowreq_ctx) { snmp_log(LOG_ERR, "Couldn't allocate memory for a " "ipDefaultRouterTable_rowreq_ctx.\n"); return NULL; } else { if (NULL != data) { /* * track if we got data from user */ rowreq_ctx->rowreq_flags |= MFD_ROW_DATA_FROM_USER; rowreq_ctx->data = data; } else if (NULL == (rowreq_ctx->data = ipDefaultRouterTable_allocate_data())) { SNMP_FREE(rowreq_ctx); return NULL; } } /* * undo context will be allocated when needed (in *_undo_setup) */ rowreq_ctx->oid_idx.oids = rowreq_ctx->oid_tmp; rowreq_ctx->ipDefaultRouterTable_data_list = NULL; /* * if we allocated data, call init routine */ if (!(rowreq_ctx->rowreq_flags & MFD_ROW_DATA_FROM_USER)) { if (SNMPERR_SUCCESS != ipDefaultRouterTable_rowreq_ctx_init(rowreq_ctx, user_init_ctx)) { ipDefaultRouterTable_release_rowreq_ctx(rowreq_ctx); rowreq_ctx = NULL; } } return rowreq_ctx; } /* ipDefaultRouterTable_allocate_rowreq_ctx */
/** * @internal * wrapper */ static int _mfd_ipDefaultRouterTable_post_request(netsnmp_mib_handler *handler, netsnmp_handler_registration *reginfo, netsnmp_agent_request_info *agtreq_info, netsnmp_request_info *requests) { ipDefaultRouterTable_rowreq_ctx *rowreq_ctx = netsnmp_container_table_row_extract(requests); int rc, packet_rc; DEBUGMSGTL(("internal:ipDefaultRouterTable:_mfd_ipDefaultRouterTable_post_request", "called\n")); /* * release row context, if deleted */ if (rowreq_ctx && (rowreq_ctx->rowreq_flags & MFD_ROW_DELETED)) ipDefaultRouterTable_release_rowreq_ctx(rowreq_ctx); /* * wait for last call before calling user */ if (1 != netsnmp_row_merge_status_last(reginfo, agtreq_info)) { DEBUGMSGTL(("internal:ipDefaultRouterTable", "waiting for last post_request\n")); return SNMP_ERR_NOERROR; } packet_rc = netsnmp_check_all_requests_error(agtreq_info->asp, 0); rc = ipDefaultRouterTable_post_request(ipDefaultRouterTable_if_ctx. user_ctx, packet_rc); if (MFD_SUCCESS != rc) { /* * nothing we can do about it but log it */ DEBUGMSGTL(("ipDefaultRouterTable", "error %d from " "ipDefaultRouterTable_post_request\n", rc)); } return SNMP_ERR_NOERROR; } /* _mfd_ipDefaultRouterTable_post_request */
/** * load initial data * * TODO:350:M: Implement ipDefaultRouterTable data load * This function will also be called by the cache helper to load * the container again (after the container free function has been * called to free the previous contents). * * @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 load the index(es) (and data, optionally) * for the every row in the data set. * * @remark * While loading the data, 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 * ipDefaultRouterTable_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 ipDefaultRouterTable_container_load(netsnmp_container * container) { netsnmp_container *defaultrouter_container; void *tmp_ptr[2]; DEBUGMSGTL(("verbose:ipDefaultRouterTable:ipDefaultRouterTable_container_load", "called\n")); /* * TODO:351:M: |-> Load/update data in the ipDefaultRouterTable container. * loop over your ipDefaultRouterTable data, allocate a rowreq context, * set the index(es) [and data, optionally] and insert into * the container. */ defaultrouter_container = netsnmp_access_defaultrouter_container_load(NULL, NETSNMP_ACCESS_DEFAULTROUTER_LOAD_ADDL_IDX_BY_ADDR); if (NULL == defaultrouter_container) return MFD_RESOURCE_UNAVAILABLE; /* msg already logged */ /* * we just got a fresh copy of interface data. compare it to * what we've already got, and make any adjustments, saving * missing addresses to be deleted. */ tmp_ptr[0] = defaultrouter_container->next; tmp_ptr[1] = NULL; CONTAINER_FOR_EACH(container, (netsnmp_container_obj_func *) _check_entry_for_updates, tmp_ptr); /* * now add any new interfaces */ CONTAINER_FOR_EACH(defaultrouter_container, (netsnmp_container_obj_func *) _add_new_entry, container); /* * free the container. we've either claimed each entry, or released it, * so the access function doesn't need to clear the container. */ netsnmp_access_defaultrouter_container_free(defaultrouter_container, NETSNMP_ACCESS_DEFAULTROUTER_FREE_DONT_CLEAR); /* * remove deleted addresses from table container */ if (NULL != tmp_ptr[1]) { netsnmp_container *tmp_container = (netsnmp_container *) tmp_ptr[1]; ipDefaultRouterTable_rowreq_ctx *tmp_ctx; /* * this works because the tmp_container is a linked list, * which can be used like a stack... */ while (CONTAINER_SIZE(tmp_container)) { /* * get from delete list */ tmp_ctx = (ipDefaultRouterTable_rowreq_ctx *) CONTAINER_FIRST(tmp_container); /* * release context, delete from table container */ CONTAINER_REMOVE(container, tmp_ctx); ipDefaultRouterTable_release_rowreq_ctx(tmp_ctx); /* * pop off delete list */ CONTAINER_REMOVE(tmp_container, NULL); } } DEBUGMSGT(("verbose:ipDefaultRouterTable:ipDefaultRouterTable_container_load", "%" NETSNMP_PRIz "d records\n", CONTAINER_SIZE(container))); return MFD_SUCCESS; }