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208 lines
4.6 KiB
208 lines
4.6 KiB
1 year ago
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<?php
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/*
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** Zabbix
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** Copyright (C) 2001-2023 Zabbix SIA
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**/
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/**
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* A parser for function macros like "{host:item.func()}".
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*/
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class C10FunctionMacroParser extends CParser {
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/**
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* An options array.
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*
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* Supported options:
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* '18_simple_checks' => true with support for old-style simple checks like "ftp,{$PORT}"
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* 'host_macro' Array of macro to be supported as host name.
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*
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* @var array
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*/
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private $options = [
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'18_simple_checks' => false,
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'host_macro' => []
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];
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/**
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* Parser for item keys.
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*
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* @var CItemkey
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*/
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private $item_key_parser;
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/**
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* Parser for trigger functions.
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*
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* @var C10FunctionParser
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*/
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private $function_parser;
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/**
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* Parser for host names.
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*
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* @var CHostNameParser
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*/
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private $host_name_parser;
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/**
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* @var CSetParser
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*/
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private $host_macro_parser;
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private $host = '';
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private $item = '';
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private $function = '';
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/**
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* @param array $options
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*/
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public function __construct($options = []) {
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$this->options = $options + $this->options;
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$this->item_key_parser = new CItemKey(['18_simple_checks' => $this->options['18_simple_checks']]);
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$this->function_parser = new C10FunctionParser();
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$this->host_name_parser = new CHostNameParser();
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if ($this->options['host_macro']) {
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$this->host_macro_parser = new CSetParser($this->options['host_macro']);
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}
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}
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/**
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* @param string $source
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* @param int $pos
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*
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* @return int
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*/
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public function parse($source, $pos = 0) {
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$this->length = 0;
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$this->match = '';
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$this->host = '';
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$this->item = '';
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$this->function = '';
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$p = $pos;
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if (!isset($source[$p]) || $source[$p] !== '{') {
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return self::PARSE_FAIL;
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}
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$p++;
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if (!$this->parseHost($source, $p)) {
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return self::PARSE_FAIL;
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}
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if (!isset($source[$p]) || $source[$p] !== ':') {
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return self::PARSE_FAIL;
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}
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$p++;
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$p2 = $p;
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if ($this->item_key_parser->parse($source, $p) == CParser::PARSE_FAIL) {
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return self::PARSE_FAIL;
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}
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$p += $this->item_key_parser->getLength();
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// for instance, agent.ping.last(0)
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if ($this->item_key_parser->getParamsNum() == 0 && isset($source[$p]) && $source[$p] == '(') {
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for (; $p > $p2 && $source[$p] != '.'; $p--) {
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// Code is not missing here.
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}
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if ($p == $p2) {
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return self::PARSE_FAIL;
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}
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}
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$p3 = $p;
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if (!isset($source[$p]) || $source[$p] !== '.') {
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return self::PARSE_FAIL;
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}
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$p++;
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if ($this->function_parser->parse($source, $p) == CParser::PARSE_FAIL) {
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return self::PARSE_FAIL;
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}
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$p += $this->function_parser->getLength();
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if (!isset($source[$p]) || $source[$p] !== '}') {
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return self::PARSE_FAIL;
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}
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$p++;
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$this->length = $p - $pos;
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$this->match = substr($source, $pos, $this->length);
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$this->host = substr($source, $pos + 1, $p2 - $pos - 2);
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$this->item = substr($source, $p2, $p3 - $p2);
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$this->function = $this->function_parser->getMatch();
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return (isset($source[$pos + $this->length]) ? self::PARSE_SUCCESS_CONT : self::PARSE_SUCCESS);
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}
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/**
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* Parses a host in a trigger function macro constant and moves a position ($pos) on a next symbol after the host.
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*
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* @param string $source
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* @param int $pos
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*
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* @return bool
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*/
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protected function parseHost($source, &$pos) {
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if ($this->options['host_macro'] && $this->host_macro_parser->parse($source, $pos) !== CParser::PARSE_FAIL) {
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$pos += $this->host_macro_parser->getLength();
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return true;
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}
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if ($this->host_name_parser->parse($source, $pos) == self::PARSE_FAIL) {
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return false;
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}
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$pos += $this->host_name_parser->getLength();
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return true;
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}
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/**
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* Returns parsed host.
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*
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* @return string
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*/
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public function getHost() {
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return $this->host;
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}
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/**
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* Returns parsed item.
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*
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* @return string
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*/
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public function getItem() {
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return $this->item;
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}
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/**
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* Returns parsed function.
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*
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* @return string
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*/
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public function getFunction() {
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return $this->function;
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}
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}
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