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softdiscomon.txt

Bridgetowermedia IT, 12/15/2017 03:23 PM

 
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/*
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 * softdiscomon
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 * 
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 * Soft Disconnect Monitor
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 * Written by Ansen Labardee and Kris Linnel
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 *
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 * This script uses curl to monitor gateways based on the html they recive back from specified sites
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 * If a specified string is found the html response a specified number of times, we mark the gateway up
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 * If the string is not found in the page source we mark the gateway as down. 
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 *
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 * This script is intened to be run by crontab and should be stored at /etc/phpshellsessions/softdiscomon
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 * This script can be invoked by the root user with the command "pfSsh.php playback softdiscomon
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 * http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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require_once("config.inc");
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require_once("functions.inc");
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global $g, $config, $test, $threshhold;
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// Set the URLs, match string and match threshold here.
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// Threshold is the number of times a match must be found in the html from the configured URL
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$threshhold = 3;
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$test = array();
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$test[1]['url'] = "https://google.com/";
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$test[2]['url'] = "https://www.freebsd.org/";
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$test[3]['url'] = "https://www.linux.org/";
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$test[1]['match'] = 'google.com';
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$test[2]['match'] = 'freebsd.org';
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$test[3]['match'] = 'linux.org';
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// Get the friendly interface name of both gateways, if a gateway doesn't exist a NULL value will be returned
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$gw0_friendly = $config['gateways']['gateway_item']['0']['interface'];
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//mai("GW0 Friendly Interface Name: $gw0_friendly \n");
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$gw1_friendly = $config['gateways']['gateway_item']['1']['interface'];
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//echo("GW1 Friendly Interface Name: $gw1_friendly \n");
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// If the friendly interface name exists then use it to get the real interface name
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// Also get the current status of the gateway 
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if ($gw0_friendly) {
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  $gw0_interface = $config['interfaces'][$gw0_friendly]['if'];
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  $gw0_name = $config['gateways']['gateway_item']['0']['name'];
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//  echo("GW0 Real Interface: $gw0_interface \n");
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//    echo("GW0 Name: $gw0_name \n");
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	  $gw0_status = get_dpinger_status($gw0_name)['status'];
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//	  echo("GW0 Status: $gw0_status \n");
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}
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if ($gw1_friendly) {
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  $gw1_interface = $config['interfaces'][$gw1_friendly]['if'];
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  $gw1_name = $config['gateways']['gateway_item']['1']['name'];
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//  echo("GW1 Real Interface: $gw1_interface \n");
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//    echo("GW1 Name: $gw1_name \n");
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	  $gw1_status = get_dpinger_status($gw1_name)['status'];
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//	  echo("GW1 Status: $gw1_status \n");
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}
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// If the Gateway has a real interface and the status is not down, then begin testing
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// using the test array and threshholds configured above.
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// We will test Gateway 0 with URLS 1&2 and Gateway 1 with URLS 2&3, if either urls return sucessfull then Mark
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// the gateway up, if both urls fail then mark it as down.
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if (($gw0_interface) && (!$gw0_status == 'down')) {
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//		echo("Starting tests on first gateway \n");
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		$pass_gw0 = 0;
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		$pass_gw0 = pass_gw0 + test_url(1, $gw0_interface);
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		$pass_gw0 = pass_gw0 + test_url(2, $gw0_interface);
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		if ($pass_gw0 > 0) {
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				mark_gw_online(0);
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		}
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		else {
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				mark_gw_offline(0);
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		}
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}
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if (($gw1_interface) && (!$gw1_status == 'down')) {
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//		echo("Starting tests on second gateway \n");
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		$pass_gw1 = 0;
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		$pass_gw1 = pass_gw1 + test_url(2, $gw1_interface);
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		$pass_gw1 = pass_gw1 + test_url(3, $gw1_interface);
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		if ($pass_gw1 > 0) {
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				mark_gw_online(1);
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		}
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		else {
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				mark_gw_offline(1);
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		}
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}
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exit(0);
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function mark_gw_online($gw_number) {
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		global $g, $config, $test, $threshhold;
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		if (!isset($config['gateways']['gateway_item'][$gw_number]['force_down'])) {
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//			echo("Gateway Already Enabled! \n");
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				return 0;
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		}
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		else {
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			unset($config['gateways']['gateway_item'][$gw_number]['force_down']);
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			write_config();
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				$name = $config['gateways']['gateway_item'][$gw_number]['name'];
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			exec("/usr/local/bin/mail.php Gateway, $name is back online.");
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//				echo("Gateway Has Been Enabled! \n");
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		}
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}
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function mark_gw_offline($gw_number) {
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		global $g, $config, $test, $threshhold;
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		if (isset($config['gateways']['gateway_item'][$gw_number]['force_down'])) {
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//			echo("Gateway Already Disabled! \n");
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				return 0;
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		}
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		else {
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			$config['gateways']['gateway_item'][$gw_number]['force_down'] = "";
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			write_config();
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				$name = $config['gateways']['gateway_item'][$gw_number]['name'];
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			exec("/usr/local/bin/mail.php Disabled gateway $name! It seems that our tests have failed.");
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//				echo("Gateway Has Been Disabled! \n");
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		}
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}
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function test_url($test_number, $interface) {
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		global $g, $config, $test, $threshhold;
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		$url = $test[$test_number]['url'];
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		$curl = curl_init($url);
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		curl_setopt($curl, CURLOPT_INTERFACE, $interface);
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		curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
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		curl_setopt($curl, CURLOPT_CONNECTTIMEOUT ,5);
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		curl_setopt($ch, CURLOPT_TIMEOUT, 10);
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		$page_source = curl_exec($curl);
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		curl_close($curl);
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		$match = $test[$test_number]['match'];
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		$count = preg_match_all($match, $page_source);
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		if ($count >= $threshold) {
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				return 1;
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		}
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		return 0;
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}