expobjecttable.c

开发snmp的开发包有两个开放的SNMP开发库

                    memset(expName,  0, sizeof(expName));
                    memcpy(expName,
                           tinfo->indexes->next_variable->val.string,
                           tinfo->indexes->next_variable->val_len);
                    vp = tinfo->indexes->next_variable->next_variable;
                    objIndex = *vp->val.integer;

                    row = expObject_createRow(expOwner, expName, objIndex, 0);
                    if (!row) {
                        netsnmp_set_request_error(reqinfo, request,
                                                  SNMP_ERR_RESOURCEUNAVAILABLE);
                        return SNMP_ERR_NOERROR;
                    }
                    netsnmp_insert_tdata_row( request, row );
                }
            }
        }
        break;

    case MODE_SET_FREE:
        for (request = requests; request; request = request->next) {
            tinfo = netsnmp_extract_table_info(request);

            switch (tinfo->colnum) {
            case COLUMN_EXPOBJECTENTRYSTATUS:
                switch (*request->requestvb->val.integer) {
                case RS_CREATEANDGO:
                case RS_CREATEANDWAIT:
                    /*
                     * Tidy up after a failed row creation request
                     */ 
                    entry = (struct expObject *)
                                netsnmp_tdata_extract_entry(request);
                    if (entry &&
                      !(entry->flags & EXP_OBJ_FLAG_VALID)) {
                        row = (netsnmp_tdata_row *)
                                netsnmp_tdata_extract_row(request);
                        expObject_removeEntry( row );
                    }
                }
            }
        }
        break;

    case MODE_SET_ACTION:
        for (request = requests; request; request = request->next) {
            tinfo = netsnmp_extract_table_info(request);
            entry = (struct expObject *)
                    netsnmp_tdata_extract_entry(request);
            if (!entry) {
                /*
                 * New rows must be created via the RowStatus column
                 */
                netsnmp_set_request_error(reqinfo, request,
                                          SNMP_ERR_NOCREATION);
                                      /* or inconsistentName? */
                return SNMP_ERR_NOERROR;

            }
        }
        break;

    case MODE_SET_UNDO:
        break;

    case MODE_SET_COMMIT:
        /*
         * All these assignments are "unfailable", so it's
         *  (reasonably) safe to apply them in the Commit phase
         */
        ret = 0;  /* Flag to re-check expExpressionPrefix settings */
        for (request = requests; request; request = request->next) {
            entry = (struct expObject *) netsnmp_tdata_extract_entry(request);
            tinfo = netsnmp_extract_table_info(request);

            switch (tinfo->colnum) {
            case COLUMN_EXPOBJECTID:
                memset(entry->expObjectID, 0, sizeof(entry->expObjectID));
                memcpy(entry->expObjectID, request->requestvb->val.string,
                                           request->requestvb->val_len);
                entry->expObjectID_len = request->requestvb->val_len;
                break;
            case COLUMN_EXPOBJECTIDWILDCARD:
                if (*request->requestvb->val.integer == TV_TRUE)
                    entry->flags |=  EXP_OBJ_FLAG_OWILD;
                else
                    entry->flags &= ~EXP_OBJ_FLAG_OWILD;
                break;
            case COLUMN_EXPOBJECTSAMPLETYPE:
                entry->expObjectSampleType = *request->requestvb->val.integer;
                break;
            case COLUMN_EXPOBJECTDELTADISCONTINUITYID:
                memset(entry->expObjDeltaD, 0, sizeof(entry->expObjDeltaD));
                memcpy(entry->expObjDeltaD, request->requestvb->val.string,
                                            request->requestvb->val_len);
                entry->expObjDeltaD_len = request->requestvb->val_len/sizeof(oid);
               /* XXX
                if ( snmp_oid_compare( entry->expObjDeltaD,
                                       entry->expObjDeltaD_len, 
                                       sysUpTime_inst,
                                       sysUpTime_inst_len ) != 0 )
                    entry->flags |= EXP_OBJ_FLAG_DDISC;
               */

                /*
                 * If the OID used for the expExpressionPrefix object
                 *   has changed, then update the expression structure.
                 */
                if ( entry->flags & EXP_OBJ_FLAG_PREFIX ) {
                    exp = expExpression_getEntry( entry->expOwner,
                                                  entry->expName );
                    memcpy( exp->expPrefix, entry->expObjDeltaD,
                            MAX_OID_LEN*sizeof(oid));
                    exp->expPrefix_len = entry->expObjDeltaD_len;
                }
                break;
            case COLUMN_EXPOBJECTDISCONTINUITYIDWILDCARD:
                if (*request->requestvb->val.integer == TV_TRUE) {
                    /*
                     * Possible new prefix OID candidate
                     * Can't set the value here, since the OID
                     *    assignment might not have been processed yet.
                     */
                    exp = expExpression_getEntry( entry->expOwner,
                                                  entry->expName );
                    if (exp && exp->expPrefix_len == 0 )
                        ret = 1;   /* Set the prefix later  */
                    entry->flags |=  EXP_OBJ_FLAG_DWILD;
                } else {
                    if ( entry->flags | EXP_OBJ_FLAG_PREFIX ) {
                        exp = expExpression_getEntry( entry->expOwner,
                                                      entry->expName );
                        memset( exp->expPrefix, 0, MAX_OID_LEN*sizeof(oid));
                        exp->expPrefix_len = 0;
                        ret = 1;   /* Need a new prefix OID */
                    }
                    entry->flags &= ~EXP_OBJ_FLAG_DWILD;
                }
                break;
            case COLUMN_EXPOBJECTDISCONTINUITYIDTYPE:
                entry->expObjDiscontinuityType =
                           *request->requestvb->val.integer;
                break;
            case COLUMN_EXPOBJECTCONDITIONAL:
                memset(entry->expObjCond, 0, sizeof(entry->expObjCond));
                memcpy(entry->expObjCond, request->requestvb->val.string,
                                          request->requestvb->val_len);
                entry->expObjCond_len = request->requestvb->val_len/sizeof(oid);
                break;
            case COLUMN_EXPOBJECTCONDITIONALWILDCARD:
                if (*request->requestvb->val.integer == TV_TRUE)
                    entry->flags |=  EXP_OBJ_FLAG_CWILD;
                else
                    entry->flags &= ~EXP_OBJ_FLAG_CWILD;
                break;
            case COLUMN_EXPOBJECTENTRYSTATUS:
                switch (*request->requestvb->val.integer) {
                case RS_ACTIVE:
                    entry->flags |= EXP_OBJ_FLAG_ACTIVE;
                    break;
                case RS_NOTINSERVICE:
                    entry->flags &= ~EXP_OBJ_FLAG_ACTIVE;
                    break;
                case RS_CREATEANDGO:
                    entry->flags |= EXP_OBJ_FLAG_ACTIVE;
                    entry->flags |= EXP_OBJ_FLAG_VALID;
                    break;
                case RS_CREATEANDWAIT:
                    entry->flags |= EXP_OBJ_FLAG_VALID;
                    break;

                case RS_DESTROY:
                    row = (netsnmp_tdata_row *)
                               netsnmp_tdata_extract_row(request);
                    expObject_removeEntry(row);
                }
            }
        }

        /*
         * Need to check for changes in expExpressionPrefix handling
         */
        for (request = requests; request; request = request->next) {
            entry = (struct expObject *) netsnmp_tdata_extract_entry(request);
            tinfo = netsnmp_extract_table_info(request);

            switch (tinfo->colnum) {
            case COLUMN_EXPOBJECTDISCONTINUITYIDWILDCARD:
                /*
                 * If a column has just been marked as wild,
                 *   then consider using it as the prefix OID
                 */
                if (*request->requestvb->val.integer == TV_TRUE) {
                    exp = expExpression_getEntry( entry->expOwner,
                                                  entry->expName );
                    if ( exp->expPrefix_len == 0 ) {
                        memcpy( exp->expPrefix, entry->expObjDeltaD,
                                MAX_OID_LEN*sizeof(oid));
                        exp->expPrefix_len = entry->expObjDeltaD_len;
                        entry->flags |= EXP_OBJ_FLAG_PREFIX;
                    }
                }
                /*
                 * If it's just been marked as non-wildcarded
                 *   then we need to look for a new candidate.
                 */
                else {

                }
                break;
            }
        }
        break;
    }
    DEBUGMSGTL(("disman:expr:mib", "Expression Object handler - done \n"));
    return SNMP_ERR_NOERROR;
}