mirror of
https://github.com/librenms/librenms.git
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300 lines
11 KiB
PHP
300 lines
11 KiB
PHP
<?php
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/* Copyright (C) 2014 Daniel Preussker <f0o@devilcode.org>
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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 3 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, see <http://www.gnu.org/licenses/>. */
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/*
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* Alerts Tracking
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* @author Daniel Preussker <f0o@devilcode.org>
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* @copyright 2014 f0o, LibreNMS
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* @license GPL
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* @package LibreNMS
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* @subpackage Alerts
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*/
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/**
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* Generate SQL from Rule
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* @param string $rule Rule to generate SQL for
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* @return string|boolean
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*/
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function GenSQL($rule)
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{
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$rule = RunMacros($rule);
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if (empty($rule)) {
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//Cannot resolve Macros due to recursion. Rule is invalid.
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return false;
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}
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//Pretty-print rule to dissect easier
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$pretty = array('*' => '*', '(' => ' ( ', ')' => ' ) ', '/' => '/', '&&' => ' && ', '||' => ' || ', 'DATE_SUB ( NOW ( )' => 'DATE_SUB( NOW()');
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$rule = str_replace(array_keys($pretty), $pretty, $rule);
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$tmp = explode(" ", $rule);
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$tables = array();
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foreach ($tmp as $opt) {
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if (strstr($opt, '%') && strstr($opt, '.')) {
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$tmpp = explode(".", $opt, 2);
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$tmpp[0] = str_replace("%", "", $tmpp[0]);
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$tables[] = mres(str_replace("(", "", $tmpp[0]));
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$rule = str_replace($opt, $tmpp[0].'.'.$tmpp[1], $rule);
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}
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}
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$tables = array_keys(array_flip($tables));
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if (dbFetchCell('SELECT 1 FROM information_schema.COLUMNS WHERE TABLE_NAME = ? && COLUMN_NAME = ?', array($tables[0],'device_id')) != 1) {
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//Our first table has no valid glue, append the 'devices' table to it!
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array_unshift($tables, 'devices');
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}
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$x = sizeof($tables)-1;
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$i = 0;
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$join = "";
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while ($i < $x) {
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if (isset($tables[$i+1])) {
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$gtmp = ResolveGlues(array($tables[$i+1]), 'device_id');
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if ($gtmp === false) {
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//Cannot resolve glue-chain. Rule is invalid.
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return false;
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}
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$last = "";
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$qry = "";
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foreach ($gtmp as $glue) {
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if (empty($last)) {
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list($tmp,$last) = explode('.', $glue);
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$qry .= $glue.' = ';
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} else {
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list($tmp,$new) = explode('.', $glue);
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$qry .= $tmp.'.'.$last.' && '.$tmp.'.'.$new.' = ';
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$last = $new;
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}
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if (!in_array($tmp, $tables)) {
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$tables[] = $tmp;
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}
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}
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$join .= "( ".$qry.$tables[0].".device_id ) && ";
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}
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$i++;
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}
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$sql = "SELECT * FROM ".implode(",", $tables)." WHERE (".$join."".str_replace("(", "", $tables[0]).".device_id = ?) && (".str_replace(array("%","@","!~","~"), array("",".*","NOT REGEXP","REGEXP"), $rule).")";
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return $sql;
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}
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/**
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* Process Macros
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* @param string $rule Rule to process
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* @param int $x Recursion-Anchor
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* @return string|boolean
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*/
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function RunMacros($rule, $x = 1)
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{
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global $config;
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krsort($config['alert']['macros']['rule']);
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foreach ($config['alert']['macros']['rule'] as $macro => $value) {
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if (!strstr($macro, " ")) {
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$rule = str_replace('%macros.'.$macro, '('.$value.')', $rule);
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}
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}
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if (strstr($rule, "%macros")) {
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if (++$x < 30) {
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$rule = RunMacros($rule, $x);
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} else {
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return false;
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}
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}
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return $rule;
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}
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/**
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* Get Alert-Rules for Devices
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* @param int $device Device-ID
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* @return array
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*/
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function GetRules($device)
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{
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$groups = GetGroupsFromDevice($device);
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$params = array($device,$device);
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$where = "";
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foreach ($groups as $group) {
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$where .= " || alert_map.target = ?";
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$params[] = 'g'.$group;
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}
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return dbFetchRows('SELECT alert_rules.* FROM alert_rules LEFT JOIN alert_map ON alert_rules.id=alert_map.rule WHERE alert_rules.disabled = 0 && ( (alert_rules.device_id = -1 || alert_rules.device_id = ? ) || alert_map.target = ? '.$where.' )', $params);
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}
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/**
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* Check if device is under maintenance
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* @param int $device Device-ID
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* @return int
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*/
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function IsMaintenance($device)
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{
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$groups = GetGroupsFromDevice($device);
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$params = array($device);
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$where = "";
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foreach ($groups as $group) {
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$where .= " || alert_schedule_items.target = ?";
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$params[] = 'g'.$group;
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}
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return dbFetchCell('SELECT alert_schedule.schedule_id FROM alert_schedule LEFT JOIN alert_schedule_items ON alert_schedule.schedule_id=alert_schedule_items.schedule_id WHERE ( alert_schedule_items.target = ?'.$where.' ) && NOW() BETWEEN alert_schedule.start AND alert_schedule.end LIMIT 1', $params);
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}
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/**
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* Run all rules for a device
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* @param int $device Device-ID
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* @return void
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*/
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function RunRules($device)
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{
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if (IsMaintenance($device) > 0) {
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echo "Under Maintenance, Skipping alerts.\r\n";
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return false;
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}
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foreach (GetRules($device) as $rule) {
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c_echo('Rule %p#'.$rule['id'].' (' . $rule['name'] . '):%n ');
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$inv = json_decode($rule['extra'], true);
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if (isset($inv['invert'])) {
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$inv = (bool) $inv['invert'];
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} else {
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$inv = false;
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}
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d_echo(PHP_EOL);
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$chk = dbFetchRow("SELECT state FROM alerts WHERE rule_id = ? && device_id = ? ORDER BY id DESC LIMIT 1", array($rule['id'], $device));
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if (empty($rule['query'])) {
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$rule['query'] = GenSQL($rule['rule']);
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}
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$sql = $rule['query'];
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$qry = dbFetchRows($sql, array($device));
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$cnt = count($qry);
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for ($i = 0; $i < $cnt; $i++) {
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if (isset($qry[$i]['ip'])) {
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$qry[$i]['ip'] = inet6_ntop($qry[$i]['ip']);
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}
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}
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$s = sizeof($qry);
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if ($s == 0 && $inv === false) {
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$doalert = false;
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} elseif ($s > 0 && $inv === false) {
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$doalert = true;
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} elseif ($s == 0 && $inv === true) {
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$doalert = true;
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} else { //( $s > 0 && $inv == false ) {
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$doalert = false;
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}
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if ($doalert) {
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if ($chk['state'] === "2") {
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c_echo('Status: %ySKIP');
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} elseif ($chk['state'] >= "1") {
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c_echo('Status: %bNOCHG');
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} else {
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$extra = gzcompress(json_encode(array('contacts' => GetContacts($qry), 'rule'=>$qry)), 9);
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if (dbInsert(array('state' => 1, 'device_id' => $device, 'rule_id' => $rule['id'], 'details' => $extra), 'alert_log')) {
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if (!dbUpdate(array('state' => 1, 'open' => 1), 'alerts', 'device_id = ? && rule_id = ?', array($device,$rule['id']))) {
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dbInsert(array('state' => 1, 'device_id' => $device, 'rule_id' => $rule['id'], 'open' => 1,'alerted' => 0), 'alerts');
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}
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c_echo(PHP_EOL . 'Status: %rALERT');
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}
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}
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} else {
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if ($chk['state'] === "0") {
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c_echo('Status: %bNOCHG');
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} else {
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if (dbInsert(array('state' => 0, 'device_id' => $device, 'rule_id' => $rule['id']), 'alert_log')) {
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if (!dbUpdate(array('state' => 0, 'open' => 1), 'alerts', 'device_id = ? && rule_id = ?', array($device,$rule['id']))) {
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dbInsert(array('state' => 0, 'device_id' => $device, 'rule_id' => $rule['id'], 'open' => 1, 'alerted' => 0), 'alerts');
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}
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c_echo(PHP_EOL . 'Status: %gOK');
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}
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}
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}
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c_echo('%n' . PHP_EOL);
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}
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}
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/**
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* Find contacts for alert
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* @param array $results Rule-Result
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* @return array
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*/
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function GetContacts($results)
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{
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global $config;
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if (sizeof($results) == 0) {
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return array();
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}
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if ($config['alert']['default_only'] === true || $config['alerts']['email']['default_only'] === true) {
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return array(''.($config['alert']['default_mail'] ? $config['alert']['default_mail'] : $config['alerts']['email']['default']) => 'NOC');
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}
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$users = get_userlist();
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$contacts = array();
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$uids = array();
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foreach ($results as $result) {
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$tmp = null;
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if (is_numeric($result["bill_id"])) {
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$tmpa = dbFetchRows("SELECT user_id FROM bill_perms WHERE bill_id = ?", array($result["bill_id"]));
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foreach ($tmpa as $tmp) {
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$uids[$tmp['user_id']] = $tmp['user_id'];
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}
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}
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if (is_numeric($result["port_id"])) {
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$tmpa = dbFetchRows("SELECT user_id FROM ports_perms WHERE access_level >= 0 AND port_id = ?", array($result["port_id"]));
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foreach ($tmpa as $tmp) {
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$uids[$tmp['user_id']] = $tmp['user_id'];
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}
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}
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if (is_numeric($result["device_id"])) {
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if ($config['alert']['syscontact'] == true) {
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if (dbFetchCell("SELECT attrib_value FROM devices_attribs WHERE attrib_type = 'override_sysContact_bool' AND device_id = ?", array($result["device_id"])) === "1") {
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$tmpa = dbFetchCell("SELECT attrib_value FROM devices_attribs WHERE attrib_type = 'override_sysContact_string' AND device_id = ?", array($result["device_id"]));
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} else {
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$tmpa = dbFetchCell("SELECT sysContact FROM devices WHERE device_id = ?", array($result["device_id"]));
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}
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if (!empty($tmpa)) {
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$contacts[$tmpa] = "NOC";
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}
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}
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$tmpa = dbFetchRows("SELECT user_id FROM devices_perms WHERE access_level >= 0 AND device_id = ?", array($result["device_id"]));
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foreach ($tmpa as $tmp) {
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$uids[$tmp['user_id']] = $tmp['user_id'];
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}
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}
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}
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foreach ($users as $user) {
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if (empty($user['email'])) {
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continue;
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} elseif (empty($user['realname'])) {
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$user['realname'] = $user['username'];
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}
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$user['level'] = get_userlevel($user['username']);
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if ($config["alert"]["globals"] && ( $user['level'] >= 5 && $user['level'] < 10 )) {
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$contacts[$user['email']] = $user['realname'];
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} elseif ($config["alert"]["admins"] && $user['level'] == 10) {
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$contacts[$user['email']] = $user['realname'];
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} elseif (in_array($user['user_id'], $uids)) {
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$contacts[$user['email']] = $user['realname'];
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}
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}
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$tmp_contacts = array();
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foreach ($contacts as $email => $name) {
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if (strstr($email, ',')) {
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$split_contacts = preg_split("/[,\s]+/", $email);
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foreach ($split_contacts as $split_email) {
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if (!empty($split_email)) {
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$tmp_contacts[$split_email] = $name;
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}
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}
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} else {
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$tmp_contacts[$email] = $name;
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}
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}
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return $tmp_contacts;
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}
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