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<?php
$rInfo=array();
// get all default routes
exec('ip route list | sed -rn "s/default via (([0-9]{1,3}\.){3}[0-9]{1,3}).*dev (\w*).*src (([0-9]{1,3}\.){3}[0-9]{1,3}).*/\3 \4 \1/p"', $routes);
exec('ip route list | sed -rn "s/default dev (\w*) scope link/\1/p"',$devs);
if(!empty($devs)) {
foreach ($devs as $dev)
exec('ip route list | sed -rn "s/(([0-9]{1,3}\.){3}[0-9]{1,3}).*dev.*("'.$dev.'").*scope link src (([0-9]{1,3}\.){3}[0-9]{1,3}).*/\3 \4 \1/p"',$routes);
}
if (!empty($routes) ) {
foreach ($routes as $i => $route) {
$prop=explode(' ', $route);
$rInfo[$i]["interface"]=$prop[0];
$rInfo[$i]["ip-address"]=$prop[1];
$rInfo[$i]["gateway"]=$prop[2];
// resolve the name of the gateway (if possible)
unset($host);
exec('host '.$prop[2].' | sed -rn "s/.*domain name pointer (.*)\./\1/p" | head -n 1', $host);
$rInfo[$i]["gw-name"] = empty($host) ? "*" : $host[0];
if (isset($checkAccess) && $checkAccess) {
// check internet connectivity w/ and w/o DNS resolution
unset($okip);
exec('ping -W1 -c 1 -I '.$prop[0].' '.RASPI_ACCESS_CHECK_IP.' | sed -rn "s/.*icmp_seq=1.*time=.*/OK/p"',$okip);
$rInfo[$i]["access-ip"] = empty($okip) ? false : true;
unset($okdns);
exec('ping -W1 -c 1 -I '.$prop[0].' '.RASPI_ACCESS_CHECK_DNS.' | sed -rn "s/.*icmp_seq=1.*time=.*/OK/p"',$okdns);
$rInfo[$i]["access-dns"] = empty($okdns) ? false : true;
}
}
} else {
$rInfo = array("error"=>"No route to the internet found");
}
$rInfo_json = json_encode($rInfo);
?>