示例#1
0
function validate_ticks($str)
{
    //		echo "Validating float:$str<br>";
    if (eregi('^[ ]*#([0-9]+)((\\.)?)([0-9]*)[ ]*$', $str, $arr)) {
        return 0;
    } else {
        return validate_float($str);
    }
}
示例#2
0
function validate_expression($expression)
{
    global $ZBX_TR_EXPR_ALLOWED_MACROS, $ZBX_TR_EXPR_REPLACE_TO, $ZBX_TR_EXPR_ALLOWED_FUNCTIONS;
    if (empty($expression)) {
        error('Expression can\'t be empty');
    }
    $expr = $expression;
    $h_status = array();
    /* Replace all {server:key.function(param)} and {MACRO} with '$ZBX_TR_EXPR_REPLACE_TO' */
    while (ereg(ZBX_EREG_EXPRESSION_TOKEN_FORMAT, $expr, $arr)) {
        if ($arr[ZBX_EXPRESSION_MACRO_ID] && !isset($ZBX_TR_EXPR_ALLOWED_MACROS[$arr[ZBX_EXPRESSION_MACRO_ID]])) {
            error('Unknown macro [' . $arr[ZBX_EXPRESSION_MACRO_ID] . ']');
            return false;
        } else {
            if (!$arr[ZBX_EXPRESSION_MACRO_ID]) {
                $host =& $arr[ZBX_EXPRESSION_SIMPLE_EXPRESSION_ID + ZBX_SIMPLE_EXPRESSION_HOST_ID];
                $key =& $arr[ZBX_EXPRESSION_SIMPLE_EXPRESSION_ID + ZBX_SIMPLE_EXPRESSION_KEY_ID];
                $function =& $arr[ZBX_EXPRESSION_SIMPLE_EXPRESSION_ID + ZBX_SIMPLE_EXPRESSION_FUNCTION_NAME_ID];
                $parameter =& $arr[ZBX_EXPRESSION_SIMPLE_EXPRESSION_ID + ZBX_SIMPLE_EXPRESSION_FUNCTION_PARAM_ID];
                /* Check host */
                $sql = 'SELECT COUNT(*) as cnt,min(status) as status,min(hostid) as hostid ' . ' FROM hosts h ' . ' WHERE h.host=' . zbx_dbstr($host) . ' AND ' . DBin_node('h.hostid', get_current_nodeid(false)) . ' AND status IN (' . HOST_STATUS_MONITORED . ',' . HOST_STATUS_NOT_MONITORED . ',' . HOST_STATUS_TEMPLATE . ') ';
                $row = DBfetch(DBselect($sql));
                if ($row['cnt'] == 0) {
                    error('No such host (' . $host . ')');
                    return false;
                } else {
                    if ($row['cnt'] != 1) {
                        error('Too many hosts (' . $host . ')');
                        return false;
                    }
                }
                $h_status[$row['status']][$row['hostid']] = $row['cnt'];
                /* Check key */
                $sql = 'SELECT i.itemid,i.value_type ' . ' FROM hosts h,items i ' . ' WHERE h.host=' . zbx_dbstr($host) . ' AND i.key_=' . zbx_dbstr($key) . ' AND h.hostid=i.hostid ' . ' AND ' . DBin_node('h.hostid', get_current_nodeid(false));
                if (!($item = DBfetch(DBselect($sql)))) {
                    error('No such monitored parameter (' . $key . ') for host (' . $host . ')');
                    return false;
                }
                /* Check function */
                if (!isset($ZBX_TR_EXPR_ALLOWED_FUNCTIONS[$function])) {
                    error('Unknown function [' . $function . ']');
                    return false;
                }
                $fnc_valid =& $ZBX_TR_EXPR_ALLOWED_FUNCTIONS[$function];
                if (is_array($fnc_valid['item_types']) && !uint_in_array($item['value_type'], $fnc_valid['item_types'])) {
                    $allowed_types = array();
                    foreach ($fnc_valid['item_types'] as $type) {
                        $allowed_types[] = item_value_type2str($type);
                    }
                    info('Function (' . $function . ') available only for items with value types [' . implode(',', $allowed_types) . ']');
                    error('Incorrect value type [' . item_value_type2str($item['value_type']) . '] for function (' . $function . ') of key (' . $host . ':' . $key . ')');
                    return false;
                }
                if (!is_null($fnc_valid['args'])) {
                    $parameter = zbx_get_params($parameter);
                    if (!is_array($fnc_valid['args'])) {
                        $fnc_valid['args'] = array($fnc_valid['args']);
                    }
                    foreach ($fnc_valid['args'] as $pid => $params) {
                        if (!isset($parameter[$pid])) {
                            if (!isset($params['mandat'])) {
                                continue;
                            } else {
                                error('Missed mandatory parameter for function (' . $function . ')');
                                return false;
                            }
                        }
                        if ('sec' == $params['type'] && validate_float($parameter[$pid]) != 0) {
                            error('[' . $parameter[$pid] . '] is not a float for function (' . $function . ')');
                            return false;
                        }
                        if ('sec_num' == $params['type'] && validate_ticks($parameter[$pid]) != 0) {
                            error('[' . $parameter[$pid] . '] is not a float or counter for function (' . $function . ')');
                            return false;
                        }
                    }
                }
            }
        }
        $expr = $arr[ZBX_EXPRESSION_LEFT_ID] . $ZBX_TR_EXPR_REPLACE_TO . $arr[ZBX_EXPRESSION_RIGHT_ID];
    }
    if (isset($h_status[HOST_STATUS_TEMPLATE]) && (count($h_status) > 1 || count($h_status[HOST_STATUS_TEMPLATE]) > 1)) {
        error("Incorrect trigger expression. You can't use template hosts" . " in mixed expressions.");
        return false;
    }
    /* Replace all calculations and numbers with '$ZBX_TR_EXPR_REPLACE_TO' */
    $expt_number = '(' . $ZBX_TR_EXPR_REPLACE_TO . '|' . ZBX_EREG_NUMBER . ')';
    $expt_term = '((\\(' . $expt_number . '\\))|(' . $expt_number . '))';
    $expr_format = '((' . $expt_term . ZBX_EREG_SPACES . ZBX_EREG_SIGN . ZBX_EREG_SPACES . $expt_term . ')|(\\(' . $expt_term . '\\)))';
    $expr_full_format = '((\\(' . $expr_format . '\\))|(' . $expr_format . '))';
    while ($res = ereg($expr_full_format . '([[:print:]]*)$', $expr, $arr)) {
        $expr = substr($expr, 0, strpos($expr, $arr[1])) . $ZBX_TR_EXPR_REPLACE_TO . $arr[58];
    }
    if ($ZBX_TR_EXPR_REPLACE_TO != $expr) {
        error('Incorrect trigger expression. [' . str_replace($ZBX_TR_EXPR_REPLACE_TO, ' ... ', $expr) . ']');
        return false;
    }
    return true;
}
function validate_percent_over($number)
{
    $safe_number = validate_float($number);
    $safe_number = abs($safe_number);
    return $safe_number;
}