/* * DisMan Event MIB: * Implementation of the mteEventNotificationTable MIB interface * See 'mteEvent.c' for active behaviour of this table. * * (based on mib2c.table_data.conf output) */ #include #include #include #include #include "disman/event/mteEvent.h" #include "disman/event/mteEventNotificationTable.h" netsnmp_feature_require(table_tdata); #ifndef NETSNMP_NO_WRITE_SUPPORT netsnmp_feature_require(check_vb_type_and_max_size); netsnmp_feature_require(check_vb_oid); #endif /* NETSNMP_NO_WRITE_SUPPORT */ static netsnmp_table_registration_info *table_info; /* Initializes the mteEventNotificationTable module */ void init_mteEventNotificationTable(void) { static oid mteEventNotificationTable_oid[] = { 1, 3, 6, 1, 2, 1, 88, 1, 4, 3 }; size_t mteEventNotificationTable_oid_len = OID_LENGTH(mteEventNotificationTable_oid); netsnmp_handler_registration *reg; /* * Ensure the (combined) table container is available... */ init_event_table_data(); /* * ... then set up the MIB interface to the mteEventNotificationTable slice */ #ifndef NETSNMP_NO_WRITE_SUPPORT reg = netsnmp_create_handler_registration("mteEventNotificationTable", mteEventNotificationTable_handler, mteEventNotificationTable_oid, mteEventNotificationTable_oid_len, HANDLER_CAN_RWRITE); #else /* !NETSNMP_NO_WRITE_SUPPORT */ reg = netsnmp_create_handler_registration("mteEventNotificationTable", mteEventNotificationTable_handler, mteEventNotificationTable_oid, mteEventNotificationTable_oid_len, HANDLER_CAN_RONLY); #endif /* !NETSNMP_NO_WRITE_SUPPORT */ table_info = SNMP_MALLOC_TYPEDEF(netsnmp_table_registration_info); netsnmp_table_helper_add_indexes(table_info, ASN_OCTET_STR, /* index: mteOwner */ /* index: mteEventName */ ASN_PRIV_IMPLIED_OCTET_STR, 0); table_info->min_column = COLUMN_MTEEVENTNOTIFICATION; table_info->max_column = COLUMN_MTEEVENTNOTIFICATIONOBJECTS; /* Register this using the (common) event_table_data container */ netsnmp_tdata_register(reg, event_table_data, table_info); DEBUGMSGTL(("disman:event:init", "Event Notify Table container (%p)\n", event_table_data)); } void shutdown_mteEventNotificationTable(void) { if (table_info) { netsnmp_table_registration_info_free(table_info); table_info = NULL; } } /** handles requests for the mteEventNotificationTable table */ int mteEventNotificationTable_handler(netsnmp_mib_handler *handler, netsnmp_handler_registration *reginfo, netsnmp_agent_request_info *reqinfo, netsnmp_request_info *requests) { netsnmp_request_info *request; netsnmp_table_request_info *tinfo; struct mteEvent *entry; int ret; DEBUGMSGTL(("disman:event:mib", "Notification Table handler (%d)\n", reqinfo->mode)); switch (reqinfo->mode) { /* * Read-support (also covers GetNext requests) */ case MODE_GET: for (request = requests; request; request = request->next) { if (request->processed) continue; entry = (struct mteEvent *) netsnmp_tdata_extract_entry(request); tinfo = netsnmp_extract_table_info(request); /* * The mteEventNotificationTable should only contains entries * for rows where the mteEventActions 'notification(0)' bit * is set. So skip entries where this isn't the case. */ if (!entry || !(entry->mteEventActions & MTE_EVENT_NOTIFICATION)) continue; switch (tinfo->colnum) { case COLUMN_MTEEVENTNOTIFICATION: snmp_set_var_typed_value(request->requestvb, ASN_OBJECT_ID, (u_char *) entry->mteNotification, entry->mteNotification_len*sizeof(oid)); break; case COLUMN_MTEEVENTNOTIFICATIONOBJECTSOWNER: snmp_set_var_typed_value(request->requestvb, ASN_OCTET_STR, (u_char *) entry->mteNotifyOwner, strlen(entry->mteNotifyOwner)); break; case COLUMN_MTEEVENTNOTIFICATIONOBJECTS: snmp_set_var_typed_value(request->requestvb, ASN_OCTET_STR, (u_char *) entry->mteNotifyObjects, strlen(entry->mteNotifyObjects)); break; } } break; #ifndef NETSNMP_NO_WRITE_SUPPORT /* * Write-support */ case MODE_SET_RESERVE1: for (request = requests; request; request = request->next) { if (request->processed) continue; tinfo = netsnmp_extract_table_info(request); /* * Since the mteEventNotificationTable only contains entries * for rows where the mteEventActions 'notification(0)' * bit is set, strictly speaking we should reject * assignments where this isn't the case. * But SET requests that include an assignment of the * 'notification(0)' bit at the same time are valid, * so would need to be accepted. Unfortunately, this * assignment is only applied in the COMMIT pass, so * it's difficult to detect whether this holds or not. * * Let's fudge things for now, by processing assignments * even if the 'notification(0)' bit isn't set. */ switch (tinfo->colnum) { case COLUMN_MTEEVENTNOTIFICATION: ret = netsnmp_check_vb_oid( request->requestvb ); if (ret != SNMP_ERR_NOERROR) { netsnmp_set_request_error(reqinfo, request, ret); return SNMP_ERR_NOERROR; } break; case COLUMN_MTEEVENTNOTIFICATIONOBJECTSOWNER: case COLUMN_MTEEVENTNOTIFICATIONOBJECTS: ret = netsnmp_check_vb_type_and_max_size( request->requestvb, ASN_OCTET_STR, MTE_STR1_LEN); if (ret != SNMP_ERR_NOERROR) { netsnmp_set_request_error(reqinfo, request, ret); return SNMP_ERR_NOERROR; } break; default: netsnmp_set_request_error(reqinfo, request, SNMP_ERR_NOTWRITABLE); return SNMP_ERR_NOERROR; } /* * The Event MIB is somewhat ambiguous as to whether * mteEventNotificationTable (and mteEventSetTable) * entries can be modified once the main mteEventTable * entry has been marked 'active'. * But it's clear from discussion on the DisMan mailing * list is that the intention is not. * * So check for whether this row is already active, * and reject *all* SET requests if it is. */ entry = (struct mteEvent *) netsnmp_tdata_extract_entry(request); if (entry && entry->flags & MTE_EVENT_FLAG_ACTIVE ) { netsnmp_set_request_error(reqinfo, request, SNMP_ERR_INCONSISTENTVALUE); return SNMP_ERR_NOERROR; } } break; case MODE_SET_RESERVE2: case MODE_SET_FREE: case MODE_SET_UNDO: break; case MODE_SET_ACTION: for (request = requests; request; request = request->next) { if (request->processed) continue; entry = (struct mteEvent *) netsnmp_tdata_extract_entry(request); if (!entry) { /* * New rows must be created via the RowStatus column * (in the main mteEventTable) */ netsnmp_set_request_error(reqinfo, request, SNMP_ERR_NOCREATION); /* or inconsistentName? */ return SNMP_ERR_NOERROR; } } break; case MODE_SET_COMMIT: /* * All these assignments are "unfailable", so it's * (reasonably) safe to apply them in the Commit phase */ for (request = requests; request; request = request->next) { if (request->processed) continue; entry = (struct mteEvent *) netsnmp_tdata_extract_entry(request); tinfo = netsnmp_extract_table_info(request); switch (tinfo->colnum) { case COLUMN_MTEEVENTNOTIFICATION: memset(entry->mteNotification, 0, sizeof(entry->mteNotification)); memcpy(entry->mteNotification, request->requestvb->val.objid, request->requestvb->val_len); entry->mteNotification_len = request->requestvb->val_len/sizeof(oid); break; case COLUMN_MTEEVENTNOTIFICATIONOBJECTSOWNER: memset(entry->mteNotifyOwner, 0, sizeof(entry->mteNotifyOwner)); memcpy(entry->mteNotifyOwner, request->requestvb->val.string, request->requestvb->val_len); break; case COLUMN_MTEEVENTNOTIFICATIONOBJECTS: memset(entry->mteNotifyObjects, 0, sizeof(entry->mteNotifyObjects)); memcpy(entry->mteNotifyObjects, request->requestvb->val.string, request->requestvb->val_len); break; } } break; #endif /* !NETSNMP_NO_WRITE_SUPPORT */ } return SNMP_ERR_NOERROR; }