User:Oblivious/SubnetCalc
SubnetCalc extension, is a subnet calculator. This extension is mostly based on the calculation functions of this open source subnet calculator.
Syntax[edit]
<subnet align=left|center|right allhosts=1> INPUT </subnet>
INPUT should be substituted with any of the following formts
1. IP & CIDR Netmask: 10.0.0.1/22 2. IP & Netmask: 10.0.0.1 255.255.252.0 3. IP & Wildcard Mask: 10.0.0.1 0.0.3.255
Example[edit]
<subnet align=left> 202.1.192.0/22 </subnet> |
|
<subnet allhosts=1 align=left> 202.1.199.176/29 </subnet> |
|
Extension[edit]
<?php
# SubnetCalc is mostly based on the code of open source PHP Subnet Calculator
# Source of PHP Subnet Calculator can be found at http://sourceforge.net/projects/subntcalc/
# To use this extension, create a file named SubnetCalc.php inside extensions directory
# Paste this code inside the file
# Insert require_once("extensions/SubnetCalc.php") to LocalSettings.php
# [[Wikipedia:User:Oblivious]]
# http://meta.wikimedia.org/wiki/User:Oblivious/SubnetCalc
# January 29, 2006
$wgExtensionFunctions[] = "wfSubnetCalc";
function wfSubnetCalc() {
global $wgParser;
$wgParser->setHook( "subnet", "CalculateSubnet" );
}
# The callback function for converting the input text to HTML output
function CalculateSubnet( $input, $argv ) {
$my_net_info = trim($input);
$align = $argv['align'];
$allhosts = $argv['allhosts'];
##Validate input
if (! ereg('^([0-9]{1,3}\.){3}[0-9]{1,3}(( ([0-9]{1,3}\.){3}[0-9]{1,3})|(/[0-9]{1,2}))$',$my_net_info)){
$error = "<pre><font color=red>Invalid Input.<br> <b>Use</b> IP & CIDR Netmask: 10.0.0.1/22 <br> Or IP & Netmask: 10.0.0.1 255.255.252.0 <br> Or IP & Wildcard Mask: 10.0.0.1 0.0.3.255</font>< /pre>";
return $error;
}
##Determine the input type
if (ereg("/",$my_net_info)){ //if cidr type mask
$dq_host = strtok("$my_net_info", "/");
$cdr_nmask = strtok("/");
if (!($cdr_nmask >= 0 && $cdr_nmask <= 32)){
return("<pre><font color=red>Invalid CIDR value. Try an integer 0 - 32.</font>< /pre>");
}
$bin_nmask=cdrtobin($cdr_nmask);
$bin_wmask=binnmtowm($bin_nmask);
} else { //Dotted quad mask?
$dqs=explode(" ", $my_net_info);
$dq_host=$dqs[0];
$bin_nmask=dqtobin($dqs[1]);
$bin_wmask=binnmtowm($bin_nmask);
if (ereg("0",rtrim($bin_nmask, "0"))) { //Wildcard mask then? hmm?
$bin_wmask=dqtobin($dqs[1]);
$bin_nmask=binwmtonm($bin_wmask);
if (ereg("0",rtrim($bin_nmask, "0"))){ //If it's not wcard, whussup?
return("<pre><font color=red>Invalid Netmask.</font>< /pre>");
}
}
$cdr_nmask=bintocdr($bin_nmask);
}
//Check for valid $dq_host
if(! ereg('^0.',$dq_host)){
foreach( explode(".",$dq_host) as $octet ){
if($octet > 255){
return("<pre><font color=red>Invalid IP Address</font>< /pre>");
}
}
}
$bin_host=dqtobin($dq_host);
$bin_bcast=(str_pad(substr($bin_host,0,$cdr_nmask),32,1));
$bin_net=(str_pad(substr($bin_host,0,$cdr_nmask),32,0));
$bin_first=(str_pad(substr($bin_net,0,31),32,1));
$bin_last=(str_pad(substr($bin_bcast,0,31),32,0));
$host_total=(bindec(str_pad("",(32-$cdr_nmask),1)) - 1);
if ($host_total <= 0){ //Takes care of 31 and 32 bit masks.
$bin_first="N/A" ; $bin_last="N/A" ; $host_total="N/A";
if ($bin_net === $bin_bcast) $bin_bcast="N/A";
}
//Determine Class
if (ereg('^0',$bin_net)){
$class="A";
$dotbin_net= "<font color=\"Green\">0</font>" . substr(dotbin($bin_net,$cdr_nmask),1) ;
}elseif (ereg('^10',$bin_net)){
$class="B";
$dotbin_net= "<font color=\"Green\">10</font>" . substr(dotbin($bin_net,$cdr_nmask),2) ;
}elseif (ereg('^110',$bin_net)){
$class="C";
$dotbin_net= "<font color=\"Green\">110</font>" . substr(dotbin($bin_net,$cdr_nmask),3) ;
}elseif (ereg('^1110',$bin_net)){
$class="D";
$dotbin_net= "<font color=\"Green\">1110</font>" . substr(dotbin($bin_net,$cdr_nmask),4) ;
$special="<font color=\"Green\">Class D = Multicast Address Space.</font>";
}else{
$class="E";
$dotbin_net= "<font color=\"Green\">1111</font>" . substr(dotbin($bin_net,$cdr_nmask),4) ;
$special="<font color=\"Green\">Class E = Experimental Address Space.</font>";
}
if (ereg('^(00001010)|(101011000001)|(1100000010101000)',$bin_net)){
$special='(<a href="http://www.ietf.org/rfc/rfc1918.txt">RFC-1918 Private Internet Address</a>)';
}
$address = $dq_host;
$addressBin = dotbin($bin_host,$cdr_nmask);
$netmask = bintodq($bin_nmask);
$netmaskBin = dotbin($bin_nmask, $cdr_nmask);
$wildcard = bintodq($bin_wmask);
$wildcardBin = dotbin($bin_wmask, $cdr_nmask);
$network = bintodq($bin_net);
$networkBin = $dotbin_net;
$networkClass = $class;
$broadcast = bintodq($bin_bcast);
$broadcastBin = dotbin($bin_bcast, $cdr_nmask);
$hostmin = bintodq($bin_first);
$hostminBin = dotbin($bin_first, $cdr_nmask);
$hostmax = bintodq($bin_last);
$hostmaxBin = dotbin($bin_last, $cdr_nmask);
$hostsNet = $host_total;
$special = "<br>" . $special; //just for the sake of doing it :)
$starthost = ip2long($hostmin);
if($allhosts) {
$allhosts = generatehosts($host_total, $starthost);
$allhosts = implode('<br> ' , $allhosts);
}
$output = "<table class=\"wikitable\" align=\"$align\">
<tr>
<th colspan=\"3\"> <b>Subnet info for $my_net_info</b>
</th></tr>
<tr>
<th> Address
</th><td> <font color=\"blue\">$address</font> </td><td> <font color=\"brown\">$addressBin</font>
</td></tr>
<tr>
<th>Netmask
</th><td><font color=\"blue\">$netmask</font></td><td> <font color=\"red\">$netmaskBin</font>
</td></tr>
<tr>
<th>Wildcard
</th><td><font color=\"blue\">$wildcard</font></td><td> <font color=\"brown\">$wildcardBin</font>
</td></tr>
<tr>
<th>Network
</th><td><font color=\"blue\">$network</font></td><td> <font color=\"brown\">$networkBin</font>
</td></tr>
<tr>
<th>Broadcast
</th><td><font color=\"blue\">$broadcast</font></td><td> <font color=\"brown\">$broadcastBin</font>
</td></tr>
<tr>
<th>HostMin
</th><td><font color=\"blue\">$hostmin</font></td><td><font color=\"brown\">$hostminBin</font>
</td></tr>
<tr>
<th>HostMax
</th><td><font color=\"blue\">$hostmax</font></td><td><font color=\"brown\">$hostmaxBin</font>
</td></tr>
<tr>
<th>Hosts/Net
</th><td><font color=\"blue\"><center>$hostsNet</center></font> </td><td><font color=\"green\">Class $networkClass network</font> $special $allhosts
</td></tr></table>";
return $output;
}
##Calculation-specific funtions
function binnmtowm($binin){
$binin=rtrim($binin, "0");
if (!ereg("0",$binin) ){
return str_pad(str_replace("1","0",$binin), 32, "1");
} else return "1010101010101010101010101010101010101010";
}
function bintocdr ($binin){
return strlen(rtrim($binin,"0"));
}
function bintodq ($binin) {
if ($binin=="N/A") return $binin;
$binin=explode(".", chunk_split($binin,8,"."));
for ($i=0; $i<4 ; $i++) {
$dq[$i]=bindec($binin[$i]);
}
return implode(".",$dq) ;
}
function bintoint ($binin){
return bindec($binin);
}
function binwmtonm($binin){
$binin=rtrim($binin, "1");
if (!ereg("1",$binin)){
return str_pad(str_replace("0","1",$binin), 32, "0");
} else return "1010101010101010101010101010101010101010";
}
function cdrtobin ($cdrin){
return str_pad(str_pad("", $cdrin, "1"), 32, "0");
}
function dotbin($binin,$cdr_nmask){
// splits 32 bit bin into dotted bin octets
if ($binin=="N/A") return $binin;
$oct=rtrim(chunk_split($binin,8,"."),".");
if ($cdr_nmask > 0){
$offset=sprintf("%u",$cdr_nmask/8) + $cdr_nmask ;
return substr($oct,0,$offset ) . " " . substr($oct,$offset) ;
} else {
return $oct;
}
}
function dqtobin($dqin) {
$dq = explode(".",$dqin);
for ($i=0; $i<4 ; $i++) {
$bin[$i]=str_pad(decbin($dq[$i]), 8, "0", STR_PAD_LEFT);
}
return implode("",$bin);
}
function inttobin ($intin) {
return str_pad(decbin($intin), 32, "0", STR_PAD_LEFT);
}
function generatehosts ($host_total, $starthost) {
for($i=0;$i<=$host_total-1;$i++)
{
$ip_range[]=long2ip($starthost+$i);
}
return $ip_range;
}
?>