/* * DisMan Event MIB: * Implementation of the mteTriggerDeltaTable MIB interface * See 'mteTrigger.c' for active behaviour of this table. * * (based on mib2c.table_data.conf output) */ #include #include #include #include #include "disman/event/mteTrigger.h" #include "disman/event/mteTriggerDeltaTable.h" netsnmp_feature_require(table_tdata); #ifndef NETSNMP_NO_WRITE_SUPPORT netsnmp_feature_require(check_vb_oid); netsnmp_feature_require(check_vb_truthvalue); #endif /* NETSNMP_NO_WRITE_SUPPORT */ /** Initializes the mteTriggerDeltaTable module */ void init_mteTriggerDeltaTable(void) { static oid mteTDeltaTable_oid[] = { 1, 3, 6, 1, 2, 1, 88, 1, 2, 3 }; size_t mteTDeltaTable_oid_len = OID_LENGTH(mteTDeltaTable_oid); netsnmp_handler_registration *reg; netsnmp_table_registration_info *table_info; int rc; /* * Ensure the (combined) table container is available... */ init_trigger_table_data(); /* * ... then set up the MIB interface to the mteTriggerDeltaTable slice */ #ifndef NETSNMP_NO_WRITE_SUPPORT reg = netsnmp_create_handler_registration("mteTriggerDeltaTable", mteTriggerDeltaTable_handler, mteTDeltaTable_oid, mteTDeltaTable_oid_len, HANDLER_CAN_RWRITE); #else /* !NETSNMP_NO_WRITE_SUPPORT */ reg = netsnmp_create_handler_registration("mteTriggerDeltaTable", mteTriggerDeltaTable_handler, mteTDeltaTable_oid, mteTDeltaTable_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: mteTriggerName */ ASN_PRIV_IMPLIED_OCTET_STR, 0); table_info->min_column = COLUMN_MTETRIGGERDELTADISCONTINUITYID; table_info->max_column = COLUMN_MTETRIGGERDELTADISCONTINUITYIDTYPE; /* Register this using the (common) trigger_table_data container */ rc = netsnmp_tdata_register(reg, trigger_table_data, table_info); if (rc != SNMPERR_SUCCESS) { snmp_log(LOG_ERR, "%s: netsnmp_tdata_register() returned %d\n", __func__, rc); return; } netsnmp_handler_owns_table_info(reg->handler->next); DEBUGMSGTL(("disman:event:init", "Trigger Delta Table\n")); } /** handles requests for the mteTriggerDeltaTable table */ int mteTriggerDeltaTable_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 mteTrigger *entry; int ret; DEBUGMSGTL(("disman:event:mib", "Delta 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 mteTrigger *) netsnmp_tdata_extract_entry(request); tinfo = netsnmp_extract_table_info(request); /* * The mteTriggerBooleanTable should only contains entries for * rows where the mteTriggerSampleType is 'deltaValue(2)' * So skip entries where this isn't the case. */ if (!entry || !(entry->flags & MTE_TRIGGER_FLAG_DELTA )) { netsnmp_request_set_error(request, SNMP_NOSUCHINSTANCE); continue; } switch (tinfo->colnum) { case COLUMN_MTETRIGGERDELTADISCONTINUITYID: snmp_set_var_typed_value(request->requestvb, ASN_OBJECT_ID, (u_char *) entry->mteDeltaDiscontID, entry->mteDeltaDiscontID_len*sizeof(oid)); break; case COLUMN_MTETRIGGERDELTADISCONTINUITYIDWILDCARD: ret = (entry->flags & MTE_TRIGGER_FLAG_DWILD ) ? TV_TRUE : TV_FALSE; snmp_set_var_typed_integer(request->requestvb, ASN_INTEGER, ret); break; case COLUMN_MTETRIGGERDELTADISCONTINUITYIDTYPE: snmp_set_var_typed_integer(request->requestvb, ASN_INTEGER, entry->mteDeltaDiscontIDType); break; } } break; #ifndef NETSNMP_NO_WRITE_SUPPORT /* * Write-support */ case MODE_SET_RESERVE1: for (request = requests; request; request = request->next) { if (request->processed) continue; entry = (struct mteTrigger *) netsnmp_tdata_extract_entry(request); tinfo = netsnmp_extract_table_info(request); /* * Since the mteTriggerDeltaTable only contains entries for * rows where mteTriggerSampleType is 'deltaValue(2)', * strictly speaking we should reject assignments where * this isn't the case. * But SET requests that include an assignment of * 'deltaValue(2)' 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 this value isn't set. */ switch (tinfo->colnum) { case COLUMN_MTETRIGGERDELTADISCONTINUITYID: 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_MTETRIGGERDELTADISCONTINUITYIDWILDCARD: ret = netsnmp_check_vb_truthvalue(request->requestvb); if (ret != SNMP_ERR_NOERROR) { netsnmp_set_request_error(reqinfo, request, ret); return SNMP_ERR_NOERROR; } break; case COLUMN_MTETRIGGERDELTADISCONTINUITYIDTYPE: ret = netsnmp_check_vb_int_range(request->requestvb, MTE_DELTAD_TTICKS, MTE_DELTAD_DATETIME); 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 the * various trigger table entries can be modified once the * main mteTriggerTable 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 mteTrigger *) netsnmp_tdata_extract_entry(request); if (entry && entry->flags & MTE_TRIGGER_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 mteTrigger *) netsnmp_tdata_extract_entry(request); if (!entry) { /* * New rows must be created via the RowStatus column * (in the main mteTriggerTable) */ 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 mteTrigger *) netsnmp_tdata_extract_entry(request); tinfo = netsnmp_extract_table_info(request); switch (tinfo->colnum) { case COLUMN_MTETRIGGERDELTADISCONTINUITYID: if ( snmp_oid_compare( request->requestvb->val.objid, request->requestvb->val_len/sizeof(oid), _sysUpTime_instance, _sysUpTime_inst_len) != 0 ) { memset(entry->mteDeltaDiscontID, 0, sizeof(entry->mteDeltaDiscontID)); memcpy(entry->mteDeltaDiscontID, request->requestvb->val.string, request->requestvb->val_len); entry->mteDeltaDiscontID_len = request->requestvb->val_len/sizeof(oid); entry->flags &= ~MTE_TRIGGER_FLAG_SYSUPT; } break; case COLUMN_MTETRIGGERDELTADISCONTINUITYIDWILDCARD: if (*request->requestvb->val.integer == TV_TRUE) entry->flags |= MTE_TRIGGER_FLAG_DWILD; else entry->flags &= ~MTE_TRIGGER_FLAG_DWILD; break; case COLUMN_MTETRIGGERDELTADISCONTINUITYIDTYPE: entry->mteDeltaDiscontIDType = *request->requestvb->val.integer; break; } } break; #endif /* !NETSNMP_NO_WRITE_SUPPORT */ } return SNMP_ERR_NOERROR; }