mirror of
https://github.com/librenms/librenms.git
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571 lines
20 KiB
PHP
Executable File
571 lines
20 KiB
PHP
Executable File
#!/usr/bin/env php
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<?php
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/*
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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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/**
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* Alerts Cronjob
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* @author f0o <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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require_once 'includes/defaults.inc.php';
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require_once 'config.php';
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$lock = false;
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if (file_exists($config['install_dir'].'/.alerts.lock')) {
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$pids = explode("\n", trim(`ps -e | grep php | awk '{print $1}'`));
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$lpid = trim(file_get_contents($config['install_dir'].'/.alerts.lock'));
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if (in_array($lpid, $pids)) {
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$lock = true;
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}
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}
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if ($lock === true) {
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exit(1);
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}
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else {
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file_put_contents($config['install_dir'].'/.alerts.lock', getmypid());
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}
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require_once $config['install_dir'].'/includes/definitions.inc.php';
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require_once $config['install_dir'].'/includes/functions.php';
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require_once $config['install_dir'].'/includes/alerts.inc.php';
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if (!defined('TEST') && $config['alert']['disable'] != 'true') {
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echo 'Start: '.date('r')."\r\n";
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echo "RunFollowUp():\r\n";
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RunFollowUp();
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echo "RunAlerts():\r\n";
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RunAlerts();
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echo "RunAcks():\r\n";
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RunAcks();
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echo 'End : '.date('r')."\r\n";
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}
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unlink($config['install_dir'].'/.alerts.lock');
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/**
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* Re-Validate Rule-Mappings
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* @param integer $device Device-ID
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* @param integer $rule Rule-ID
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* @return boolean
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*/
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function IsRuleValid($device, $rule) {
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global $rulescache;
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if (empty($rulescache[$device]) || !isset($rulescache[$device])) {
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foreach (GetRules($device) as $chk) {
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$rulescache[$device][$chk['id']] = true;
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}
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}
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if ($rulescache[$device][$rule] === true) {
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return true;
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}
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return false;
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}//end IsRuleValid()
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/**
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* Issue Alert-Object
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* @param array $alert
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* @return boolean
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*/
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function IssueAlert($alert) {
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global $config;
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if (dbFetchCell('SELECT attrib_value FROM devices_attribs WHERE attrib_type = "disable_notify" && device_id = ?', array($alert['device_id'])) == '1') {
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return true;
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}
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if ($config['alert']['fixed-contacts'] == false) {
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$alert['details']['contacts'] = GetContacts($alert['details']['rule']);
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}
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$obj = DescribeAlert($alert);
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if (is_array($obj)) {
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echo 'Issuing Alert-UID #'.$alert['id'].'/'.$alert['state'].': ';
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$msg = FormatAlertTpl($obj);
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$obj['msg'] = $msg;
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if (!empty($config['alert']['transports'])) {
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ExtTransports($obj);
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}
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echo "\r\n";
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}
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return true;
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}//end IssueAlert()
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/**
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* Issue ACK notification
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* @return void
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*/
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function RunAcks() {
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foreach (dbFetchRows('SELECT alerts.device_id, alerts.rule_id, alerts.state FROM alerts WHERE alerts.state = 2 && alerts.open = 1') as $alert) {
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$tmp = array(
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$alert['rule_id'],
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$alert['device_id'],
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);
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$alert = dbFetchRow('SELECT alert_log.id,alert_log.rule_id,alert_log.device_id,alert_log.state,alert_log.details,alert_log.time_logged,alert_rules.rule,alert_rules.severity,alert_rules.extra,alert_rules.name FROM alert_log,alert_rules WHERE alert_log.rule_id = alert_rules.id && alert_log.device_id = ? && alert_log.rule_id = ? && alert_rules.disabled = 0 ORDER BY alert_log.id DESC LIMIT 1', array($alert['device_id'], $alert['rule_id']));
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if (empty($alert['rule']) || !IsRuleValid($tmp[1], $tmp[0])) {
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// Alert-Rule does not exist anymore, let's remove the alert-state.
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echo 'Stale-Rule: #'.$tmp[0].'/'.$tmp[1]."\r\n";
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dbDelete('alerts', 'rule_id = ? && device_id = ?', array($tmp[0], $tmp[1]));
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continue;
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}
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$alert['details'] = json_decode(gzuncompress($alert['details']), true);
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$alert['state'] = 2;
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IssueAlert($alert);
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dbUpdate(array('open' => 0), 'alerts', 'rule_id = ? && device_id = ?', array($alert['rule_id'], $alert['device_id']));
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}
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}//end RunAcks()
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/**
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* Run Follow-Up alerts
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* @return void
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*/
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function RunFollowUp() {
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global $config;
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foreach (dbFetchRows('SELECT alerts.device_id, alerts.rule_id, alerts.state FROM alerts WHERE alerts.state != 2 && alerts.state > 0 && alerts.open = 0') as $alert) {
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$tmp = array(
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$alert['rule_id'],
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$alert['device_id'],
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);
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$alert = dbFetchRow('SELECT alert_log.id,alert_log.rule_id,alert_log.device_id,alert_log.state,alert_log.details,alert_log.time_logged,alert_rules.rule,alert_rules.severity,alert_rules.extra,alert_rules.name FROM alert_log,alert_rules WHERE alert_log.rule_id = alert_rules.id && alert_log.device_id = ? && alert_log.rule_id = ? && alert_rules.disabled = 0 ORDER BY alert_log.id DESC LIMIT 1', array($alert['device_id'], $alert['rule_id']));
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if (empty($alert['rule']) || !IsRuleValid($tmp[1], $tmp[0])) {
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// Alert-Rule does not exist anymore, let's remove the alert-state.
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echo 'Stale-Rule: #'.$tmp[0].'/'.$tmp[1]."\r\n";
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dbDelete('alerts', 'rule_id = ? && device_id = ?', array($tmp[0], $tmp[1]));
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continue;
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}
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$alert['details'] = json_decode(gzuncompress($alert['details']), true);
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$rextra = json_decode($alert['extra'], true);
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if ($rextra['invert']) {
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continue;
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}
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$chk = dbFetchRows(GenSQL($alert['rule']), array($alert['device_id']));
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$o = sizeof($alert['details']['rule']);
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$n = sizeof($chk);
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$ret = 'Alert #'.$alert['id'];
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$state = 0;
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if ($n > $o) {
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$ret .= ' Worsens';
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$state = 3;
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}
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else if ($n < $o) {
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$ret .= ' Betters';
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$state = 4;
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}
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if ($state > 0 && $n > 0) {
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$alert['details']['rule'] = $chk;
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if (dbInsert(array('state' => $state, 'device_id' => $alert['device_id'], 'rule_id' => $alert['rule_id'], 'details' => gzcompress(json_encode($alert['details']), 9)), 'alert_log')) {
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dbUpdate(array('state' => $state, 'open' => 1, 'alerted' => 1), 'alerts', 'rule_id = ? && device_id = ?', array($alert['rule_id'], $alert['device_id']));
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}
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echo $ret.' ('.$o.'/'.$n.")\r\n";
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}
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}//end foreach
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}//end RunFollowUp()
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/**
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* Run all alerts
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* @return void
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*/
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function RunAlerts() {
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global $config;
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foreach (dbFetchRows('SELECT alerts.device_id, alerts.rule_id, alerts.state FROM alerts WHERE alerts.state != 2 && alerts.open = 1') as $alert) {
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$tmp = array(
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$alert['rule_id'],
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$alert['device_id'],
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);
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$alert = dbFetchRow('SELECT alert_log.id,alert_log.rule_id,alert_log.device_id,alert_log.state,alert_log.details,alert_log.time_logged,alert_rules.rule,alert_rules.severity,alert_rules.extra,alert_rules.name FROM alert_log,alert_rules WHERE alert_log.rule_id = alert_rules.id && alert_log.device_id = ? && alert_log.rule_id = ? && alert_rules.disabled = 0 ORDER BY alert_log.id DESC LIMIT 1', array($alert['device_id'], $alert['rule_id']));
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if (empty($alert['rule_id']) || !IsRuleValid($tmp[1], $tmp[0])) {
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echo 'Stale-Rule: #'.$tmp[0].'/'.$tmp[1]."\r\n";
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// Alert-Rule does not exist anymore, let's remove the alert-state.
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dbDelete('alerts', 'rule_id = ? && device_id = ?', array($tmp[0], $tmp[1]));
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continue;
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}
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$alert['details'] = json_decode(gzuncompress($alert['details']), true);
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$noiss = false;
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$noacc = false;
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$updet = false;
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$rextra = json_decode($alert['extra'], true);
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$chk = dbFetchRow('SELECT alerts.alerted,devices.ignore,devices.disabled FROM alerts,devices WHERE alerts.device_id = ? && devices.device_id = alerts.device_id && alerts.rule_id = ?', array($alert['device_id'], $alert['rule_id']));
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if ($chk['alerted'] == $alert['state']) {
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$noiss = true;
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}
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if (!empty($rextra['count']) && empty($rextra['interval'])) {
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// This check below is for compat-reasons
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if (!empty($rextra['delay'])) {
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if ((time() - strtotime($alert['time_logged']) + $config['alert']['tolerance_window']) < $rextra['delay'] || (!empty($alert['details']['delay']) && (time() - $alert['details']['delay'] + $config['alert']['tolerance_window']) < $rextra['delay'])) {
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continue;
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}
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else {
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$alert['details']['delay'] = time();
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$updet = true;
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}
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}
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if ($alert['state'] == 1 && !empty($rextra['count']) && ($rextra['count'] == -1 || $alert['details']['count']++ < $rextra['count'])) {
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if ($alert['details']['count'] < $rextra['count']) {
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$noacc = true;
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}
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$updet = true;
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$noiss = false;
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}
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}
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else {
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// This is the new way
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if (!empty($rextra['delay']) && (time() - strtotime($alert['time_logged']) + $config['alert']['tolerance_window']) < $rextra['delay']) {
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continue;
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}
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if (!empty($rextra['interval'])) {
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if (!empty($alert['details']['interval']) && (time() - $alert['details']['interval'] + $config['alert']['tolerance_window']) < $rextra['interval']) {
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continue;
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}
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else {
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$alert['details']['interval'] = time();
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$updet = true;
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}
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}
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if ($alert['state'] == 1 && !empty($rextra['count']) && ($rextra['count'] == -1 || $alert['details']['count']++ < $rextra['count'])) {
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if ($alert['details']['count'] < $rextra['count']) {
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$noacc = true;
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}
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$updet = true;
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$noiss = false;
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}
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}//end if
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if ($chk['ignore'] == 1 || $chk['disabled'] == 1) {
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$noiss = true;
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$updet = false;
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$noacc = false;
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}
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if (IsMaintenance($alert['device_id']) > 0) {
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$noiss = true;
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$noacc = true;
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}
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if ($updet) {
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dbUpdate(array('details' => gzcompress(json_encode($alert['details']), 9)), 'alert_log', 'id = ?', array($alert['id']));
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}
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if (!empty($rextra['mute'])) {
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echo 'Muted Alert-UID #'.$alert['id']."\r\n";
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$noiss = true;
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}
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if (!$noiss) {
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IssueAlert($alert);
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dbUpdate(array('alerted' => $alert['state']), 'alerts', 'rule_id = ? && device_id = ?', array($alert['rule_id'], $alert['device_id']));
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}
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if (!$noacc) {
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dbUpdate(array('open' => 0), 'alerts', 'rule_id = ? && device_id = ?', array($alert['rule_id'], $alert['device_id']));
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}
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}//end foreach
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}//end RunAlerts()
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/**
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* Run external transports
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* @param array $obj Alert-Array
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* @return void
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*/
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function ExtTransports($obj) {
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global $config;
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$tmp = false;
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// To keep scrutinizer from naging because it doesnt understand eval
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foreach ($config['alert']['transports'] as $transport => $opts) {
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if (($opts === true || !empty($opts)) && $opts != false && file_exists($config['install_dir'].'/includes/alerts/transport.'.$transport.'.php')) {
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echo $transport.' => ';
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eval('$tmp = function($obj,$opts) { global $config; '.file_get_contents($config['install_dir'].'/includes/alerts/transport.'.$transport.'.php').' return false; };');
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$tmp = $tmp($obj,$opts);
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$prefix = array( 0=>"recovery", 1=>$obj['severity']." alert", 2=>"acknowledgment" );
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$prefix[3] = &$prefix[0];
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$prefix[4] = &$prefix[0];
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if ($tmp) {
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echo 'OK';
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log_event('Issued '.$prefix[$obj['state']]." for rule '".$obj['name']."' to transport '".$transport."'", $obj['device_id']);
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}
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else {
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echo 'ERROR';
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log_event('Could not issue '.$prefix[$obj['state']]." for rule '".$obj['name']."' to transport '".$transport."'", $obj['device_id']);
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}
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}
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echo '; ';
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}
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}//end ExtTransports()
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/**
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* Format Alert
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* @param array $obj Alert-Array
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* @return string
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*/
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function FormatAlertTpl($obj) {
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$tpl = $obj["template"];
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$msg = '$ret .= "'.str_replace(array('{else}', '{/if}', '{/foreach}'), array('"; } else { $ret .= "', '"; } $ret .= "', '"; } $ret .= "'), addslashes($tpl)).'";';
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$parsed = $msg;
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$s = strlen($msg);
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$x = $pos = -1;
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$buff = '';
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$if = $for = false;
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while (++$x < $s) {
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if ($msg[$x] == '{' && $buff == '') {
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$buff .= $msg[$x];
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}
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else if ($buff == '{ ') {
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$buff = '';
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}
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else if ($buff != '') {
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$buff .= $msg[$x];
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}
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if ($buff == '{if') {
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$pos = $x;
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$if = true;
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}
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else if ($buff == '{foreach') {
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$pos = $x;
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$for = true;
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}
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if ($pos != -1 && $msg[$x] == '}') {
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$orig = $buff;
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$buff = '';
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$pos = -1;
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if ($if) {
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$if = false;
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$o = 3;
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$native = array(
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'"; if( ',
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' ) { $ret .= "',
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);
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}
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else if ($for) {
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$for = false;
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$o = 8;
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$native = array(
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'"; foreach( ',
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' as $key=>$value) { $ret .= "',
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);
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}
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else {
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continue;
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}
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$cond = trim(populate(substr($orig, $o, -1), false));
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$native = $native[0].$cond.$native[1];
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$parsed = str_replace($orig, $native, $parsed);
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unset($cond, $o, $orig, $native);
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}//end if
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}//end while
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$parsed = populate($parsed);
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return RunJail($parsed, $obj);
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}//end FormatAlertTpl()
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/**
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* Describe Alert
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* @param array $alert Alert-Result from DB
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* @return array
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*/
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function DescribeAlert($alert) {
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$obj = array();
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$i = 0;
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$device = dbFetchRow('SELECT hostname FROM devices WHERE device_id = ?', array($alert['device_id']));
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$tpl = dbFetchRow('SELECT `template`,`title`,`title_rec` FROM `alert_templates` JOIN `alert_template_map` ON `alert_template_map`.`alert_templates_id`=`alert_templates`.`id` WHERE `alert_template_map`.`alert_rule_id`=?', array($alert['rule_id']));
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$default_tpl = "%title\r\nSeverity: %severity\r\n{if %state == 0}Time elapsed: %elapsed\r\n{/if}Timestamp: %timestamp\r\nUnique-ID: %uid\r\nRule: {if %name}%name{else}%rule{/if}\r\n{if %faults}Faults:\r\n{foreach %faults} #%key: %value.string\r\n{/foreach}{/if}Alert sent to: {foreach %contacts}%value <%key> {/foreach}";
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$obj['hostname'] = $device['hostname'];
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$obj['device_id'] = $alert['device_id'];
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$extra = $alert['details'];
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if (!isset($tpl['template'])) {
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$obj['template'] = $default_tpl;
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} else {
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$obj['template'] = $tpl['template'];
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}
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if ($alert['state'] >= 1) {
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if (!empty($tpl['title'])) {
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$obj['title'] = $tpl['title'];
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}
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else {
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$obj['title'] = 'Alert for device '.$device['hostname'].' - '.($alert['name'] ? $alert['name'] : $alert['rule']);
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}
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if ($alert['state'] == 2) {
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$obj['title'] .= ' got acknowledged';
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}
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else if ($alert['state'] == 3) {
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$obj['title'] .= ' got worse';
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}
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else if ($alert['state'] == 4) {
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$obj['title'] .= ' got better';
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}
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foreach ($extra['rule'] as $incident) {
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$i++;
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$obj['faults'][$i] = $incident;
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foreach ($incident as $k => $v) {
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if (!empty($v) && $k != 'device_id' && (stristr($k, 'id') || stristr($k, 'desc') || stristr($k, 'msg')) && substr_count($k, '_') <= 1) {
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$obj['faults'][$i]['string'] .= $k.' => '.$v.'; ';
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}
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}
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}
|
|
}
|
|
else if ($alert['state'] == 0) {
|
|
$id = dbFetchRow('SELECT alert_log.id,alert_log.time_logged,alert_log.details FROM alert_log WHERE alert_log.state != 2 && alert_log.state != 0 && alert_log.rule_id = ? && alert_log.device_id = ? && alert_log.id < ? ORDER BY id DESC LIMIT 1', array($alert['rule_id'], $alert['device_id'], $alert['id']));
|
|
if (empty($id['id'])) {
|
|
return false;
|
|
}
|
|
|
|
$extra = json_decode(gzuncompress($id['details']), true);
|
|
if (!empty($tpl['title_rec'])) {
|
|
$obj['title'] = $tpl['title_rec'];
|
|
}
|
|
else {
|
|
$obj['title'] = 'Device '.$device['hostname'].' recovered from '.($alert['name'] ? $alert['name'] : $alert['rule']);
|
|
}
|
|
$obj['elapsed'] = TimeFormat(strtotime($alert['time_logged']) - strtotime($id['time_logged']));
|
|
$obj['id'] = $id['id'];
|
|
$obj['faults'] = false;
|
|
}
|
|
else {
|
|
return 'Unknown State';
|
|
}//end if
|
|
$obj['uid'] = $alert['id'];
|
|
$obj['severity'] = $alert['severity'];
|
|
$obj['rule'] = $alert['rule'];
|
|
$obj['name'] = $alert['name'];
|
|
$obj['timestamp'] = $alert['time_logged'];
|
|
$obj['contacts'] = $extra['contacts'];
|
|
$obj['state'] = $alert['state'];
|
|
if (strstr($obj['title'],'%')) {
|
|
$obj['title'] = RunJail('$ret = "'.populate(addslashes($obj['title'])).'";', $obj);
|
|
}
|
|
return $obj;
|
|
|
|
}//end DescribeAlert()
|
|
|
|
|
|
/**
|
|
* Format Elapsed Time
|
|
* @param integer $secs Seconds elapsed
|
|
* @return string
|
|
*/
|
|
function TimeFormat($secs) {
|
|
$bit = array(
|
|
'y' => $secs / 31556926 % 12,
|
|
'w' => $secs / 604800 % 52,
|
|
'd' => $secs / 86400 % 7,
|
|
'h' => $secs / 3600 % 24,
|
|
'm' => $secs / 60 % 60,
|
|
's' => $secs % 60,
|
|
);
|
|
$ret = array();
|
|
foreach ($bit as $k => $v) {
|
|
if ($v > 0) {
|
|
$ret[] = $v.$k;
|
|
}
|
|
}
|
|
|
|
if (empty($ret)) {
|
|
return 'none';
|
|
}
|
|
|
|
return join(' ', $ret);
|
|
|
|
}//end TimeFormat()
|
|
|
|
|
|
/**
|
|
* "Safely" run eval
|
|
* @param string $code Code to run
|
|
* @param array $obj Object with variables
|
|
* @return string|mixed
|
|
*/
|
|
function RunJail($code, $obj) {
|
|
$ret = '';
|
|
eval($code);
|
|
return $ret;
|
|
|
|
}//end RunJail()
|
|
|
|
|
|
/**
|
|
* Populate variables
|
|
* @param string $txt Text with variables
|
|
* @param boolean $wrap Wrap variable for text-usage (default: true)
|
|
* @return string
|
|
*/
|
|
function populate($txt, $wrap=true) {
|
|
preg_match_all('/%([\w\.]+)/', $txt, $m);
|
|
foreach ($m[1] as $tmp) {
|
|
$orig = $tmp;
|
|
$rep = false;
|
|
if ($tmp == 'key' || $tmp == 'value') {
|
|
$rep = '$'.$tmp;
|
|
}
|
|
else {
|
|
if (strstr($tmp, '.')) {
|
|
$tmp = explode('.', $tmp, 2);
|
|
$pre = '$'.$tmp[0];
|
|
$tmp = $tmp[1];
|
|
}
|
|
else {
|
|
$pre = '$obj';
|
|
}
|
|
|
|
$rep = $pre."['".str_replace('.', "']['", $tmp)."']";
|
|
if ($wrap) {
|
|
$rep = '{'.$rep.'}';
|
|
}
|
|
}
|
|
|
|
$txt = str_replace('%'.$orig, $rep, $txt);
|
|
}//end foreach
|
|
|
|
return $txt;
|
|
|
|
}//end populate()
|