Presence detection with Linksys routers and PHP script

Tutorials & Examples Solutions
1

Working Devices

Model Number	Description	Vulnerable Firmware Versions (less than or equal to)	
E1200	Linksys E1200	1.0.04 (build 1)	2.0.11 (build 1)
E4200	Simultaneous Dual-Band Wireless-N Gigabit Router	1.0.06 (build 3)	2.1.41 (build 164606)
EA2700	Simultaneous Dual-Band Wireless-N Gigabit Router	1.1.40 (build 189581)	
EA2750	Simultaneous Dual-Band Wireless-N Gigabit Router	1.1.8 (build 184154)	
EA3500	Simultaneous Dual-Band Wireless-N Gigabit Router	1.1.40 (build 162464)	
EA4500	Simultaneous Dual-Band Wireless-N Gigabit Router	2.1.42 (build 183584)	3.1.7 (build 181919)
EA5800	Simultaneous Dual-Band Wireless-AC Gigabit Router	1.1.6.186296	
EA6100	Simultaneous Dual-Band Wireless-AC Gigabit Router	1.1.6 (build 181939)	
EA6200	Simultaneous Dual-Band Wireless-AC Gigabit Router	1.1.41 (build 188556)	
EA6300	Simultaneous Dual-Band Wireless-AC Gigabit Router	1.1.40 (build 184085)	
EA6350	Simultaneous Dual-Band Wireless-AC Gigabit Router	3.1.10.191322	
EA6400	Simultaneous Dual-Band Wireless-AC Gigabit Router	1.1.40 (build 184085)	
EA6500	Simultaneous Dual-Band Wireless-AC Gigabit Router	1.1.40 (build 176451)	
EA6700	Simultaneous Dual-Band Wireless-AC Gigabit Router	1.1.41 (build 183873)	
EA6900	Simultaneous Dual-Band Wireless-AC Gigabit Router	2.0.3.186963	1.1.43 (build 182871)
EA7300	Max-Stream AC1750 MU-MIMO GIGABIT ROUTER	1.1.4.192824	
EA7400	Simultaneous Dual-Band Wireless-AC Gigabit Router	2.0.7.191563	1.1.5.190349
EA7500	Max-Stream AC1900 MU-MIMO GIGABIT ROUTER	2.0.7.191563	1.1.5.190349
EA8100	Max-Stream AC2600 MU-MIMO GIGABIT ROUTER	1.0.2.193233	
EA8300	Linksys AC2200 MU-MIMO Gigabit Tri-Band Router	1.1.4.191539	
EA8500	Simultaneous Dual-Band Wireless-AC Gigabit Router	1.1.9.192968	
EA9200	Linksys AC3200 Tri-Band Smart Wi-Fi Router	1.1.9 (Build 183676)	
EA9300	Linksys MAX-STREAM AC4000 MU-MIMO Tri-Band Router	1.1.9.183697	
EA9400	Linksys MAX-STREAM AC5000 MU-MIMO Gigabit Router	1.0.3.181249	
EA9500	Linksys MAX-STREAM AC5400 MU-MIMO Gigabit Router	2.1.1.186574	1.1.7.180968
WRT1200AC	Simultaneous Dual-Band Wireless-AC Gigabit Router	2.0.6.191786	1.0.5.187766
WRT1900AC	Simultaneous Dual-Band Wireless-AC Gigabit Router	2.0.8.187766	1.1.10.187766
WRT1900ACS	Simultaneous Dual-Band Wireless-AC Gigabit Router	2.0.2.188405	1.0.3.187766
WRT3200ACM	Simultaneous Dual-Band Wireless-AC Gigabit Router	1.0.6.186168	
XAC1200	Simultaneous Dual-Band Wireless-AC Gigabit Router	1.1.42.166111	
XAC1900	Simultaneous Dual-Band Wireless-AC Gigabit Router	1.1.42.162280
WHW01	Velop	1.1.10.191690
WHW03	Velop	1.1.8.192419	2.1.8.192419

PHP code

#!/usr/bin/php
<?php

// Settings
$oh_url = "192.168.1.249";
$oh_port = "8080";
$linksys_ip = "192.168.1.251";
$devices_to_check = array(
    array('mac' => '6c:c7:ec:be:21:77', 'item' => 'Phone_1'),
    array('mac' => '64:cc:2e:64:fe:88', 'item' => 'Phone_2')	 
);

if(!function_exists('curl_version')) {
	echo "Please install cURL for PHP\n";
	echo "Ubuntu: sudo apt install php-curl\n";
	exit;
}

// Get active connections from Linksys router
$connections = getLinksysConnections($linksys_ip);

// Loop throught devices to check
foreach($devices_to_check as $device_to_check) {
	// Get state of device to check
	$state = getOHItemState($oh_url, $oh_port, $device_to_check['item']);
	
	// Check if device is online
	$is_online = isOnline($connections, $device_to_check['mac']);

	// Update status of device to check
	if($state == 'OFF' && $is_online) {
		setOHItemState($oh_url, $oh_port, $device_to_check['item'], 'ON');
	}
	if($state == 'ON' && !$is_online) {
		setOHItemState($oh_url, $oh_port, $device_to_check['item'], 'OFF');
	}	
}


// isOnline
function isOnline($connections, $mac_to_check) {
	$online = false;
	foreach($connections as $connection) {
		$connection_mac = $connection['macAddress'];
		if (strtoupper($mac_to_check)==$connection_mac) {
			$online = true;
		}
	}
	
	return $online;
}

// getOHItemState
function getOHItemState($oh_url, $oh_port, $item) {
	$state = 'OFF';
    $headers = array();
	$headers[] = 'Content-Type: text/plain';
	$headers[] = 'Accept: application/json';
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_URL, "http://$oh_url:$oh_port/rest/items/$item");
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $response = curl_exec($ch);
    if (!curl_errno($ch)) {
        $json = json_decode($response, true);
		if(isset($json['state'])) {
			$state = $json['state'];
		}
    }
	curl_close($ch);
	
	return $state;
}

// setOHItemState
function setOHItemState($oh_url, $oh_port, $item, $state = 'OFF') {
	$return = false;
    $headers = array();
	$headers[] = 'Content-Type: text/plain';
	$headers[] = 'Accept: application/json';
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_URL, "http://$oh_url:$oh_port/rest/items/$item");
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($ch, CURLOPT_POST, 1);
	curl_setopt($ch, CURLOPT_POSTFIELDS, $state);
    curl_exec($ch);
	
    if (!curl_errno($ch)) {
        $return = true;
    }
	curl_close($ch);
	
	return $return;	
}

// getLinksysConnections
function getLinksysConnections($linksys_ip) {
	define('ACTION', 'http://cisco.com/jnap/networkconnections/GetNetworkConnections');
	$connections = array();

	$ch = curl_init();
	curl_setopt($ch, CURLOPT_URL, 'http://'.$linksys_ip.'/JNAP/');
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($ch, CURLOPT_POST, 1);
	curl_setopt($ch, CURLOPT_POSTFIELDS, "{}");

	$headers = array();
	$headers[] = 'X-Jnap-Action: '.ACTION;
	$headers[] = 'Content-Type: application/x-www-form-urlencoded';
	curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

	$json = json_decode(curl_exec($ch), true);
	if (!curl_errno($ch)) {
		$connections = $json['output']['connections'];
	}
	curl_close($ch);
	
	return $connections;
}

Crontab

*/1 * * * * /path/phpscript

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