<h2>LAN IP Setting</h2>

<?php
$building = $_REQUEST["building"];
$netmask = $_REQUEST["netmask"];

$buildings = array(16 => "CC1", 17 => "CC2", 18 => "Administration", 19 => "Boys Hostel", 20 => "...",
		 21 => "Library", 22 => "...", 23 => "Visitors Hostel", 24 => "Girls Hostel", 25 => "LT-MBA",
		 26 => "Residences", 27 => "...", 28 => "...", 29 => "...", 30 => "BPL Network", 31 => "INDEMICA");
$subnets = array(16 => "16", 17 => "16", 18 => "4", 19 => "8", 20 => "1", 21 => "4", 22 => "1", 23 => "4",
		24 => "4", 25 => "4", 26 => "8", 27 => "1", 28 => "1", 29 => "1", 30 => "1", 31 => "1");

echo "<table><tr valign='top'>
<td>VLANs<br>";
for ($i=16; $i<32; $i++) {
	echo "[ VLAN " . $i . " with " . $subnets[$i] . " subnets ]";
}
echo "</td></tr>
<tr><td>Building: <select name='building'>";
for ($i=16; $i<32; $i++) {
        echo "<option value='$i'";
        if ($i == $building) {
		$vlan = $i;
		$subnet = $subnets[$i];
		echo " selected";
        }
	echo ">$buildings[$i]</option>";
}
echo "</select> <input type='submit' name='submit' value='GET IP'></td></tr>
</table>";
$netmask = 256 - $subnet;
if ($building){
  	for ($k = 1; $k <= $subnet; $k++) {
		echo "<table border='1' cellspacing='10' cellpadding='10'><tr>";
		for ($j = 1; $j <= 254; $j++){
			$row++;
			echo "<td><b>
			VLAN: $vlan ($buildings[$vlan])<br>
			IP Address: 172.{$vlan}.$k.$j<br>
            		Netmask: 255.255.{$netmask}.0<br>";
			if ($vlan == "16" || $vlan == "17") {
            			echo "Gateway: 172.{$vlan}.$k.1";
			} else {
				echo "Gateway: 172.{$vlan}.0.1";
			}
  			echo "<br>
			Default DNS: 172.31.1.30<br>
        		Alternate DNS: 8.8.8.8<br>
			Proxy: 172.31.1.[1/3/4/6]:8080<br> 
			Auto Script: http://www.iiita.ac.in/proxy.pac<br><br>
			</b></td>";
      			if ($row % 2 == 0) echo "</tr><tr>";
		}
		echo "</tr></table><br>";
	}
}

?>