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raspap-webgui/includes/internetRoute.php

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<?php
/*
* Fetches details of the kernel routing table
*
* @param boolean $checkAccesss Perform connectivity test
* @return string
*/
function getRouteInfo($checkAccess)
{
$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;
}
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}
} else {
$rInfo = array("error" => "No route to the internet found");
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}
return $rInfo;
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}
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?>