Calcolare indirizzo IP e rete in PHP

In rete si trovano già numerosi calcolatori di indirizzi IP e rete, come per esempio questo oppure questo.

Prendendo spunto da essi ecco una classe in PHP per ottenere i medesimi risultati. Lo scopo principale in questo caso è utilizzare le operazioni binarie in PHP per calcolare i vari valori di ID Rete, Subnet mask, ecc.

<?php

class IPCalc {
	
	const NO_ERROR = 0;
	const IP_ERROR = 1;
	const NETMASK_ERROR = 2;
	
	private $ip = array(0,0,0,0);
	private $netmask = array(0,0,0,0);
	private $wildcard = array(0,0,0,0);
	private $netid = array(0,0,0,0);
	private $broadcast = array(0,0,0,0);
	private $hostmin = array(0,0,0,0);
	private $hostmax = array(0,0,0,0);
	private $nhosts = 0;
	private $nnetmask = 24;
	private $class = "";
	private $error = self::IP_ERROR;
	
	private $classes = array(
								//min	max		1st octet	network=1,hosts=0
		"A" 			=> array(1,		126,	0,			array(1,0,0,0)),
		"A localhost" 	=> array(127,	127,	0,			array(1,0,0,0)),
		"B" 			=> array(128,	191,	10,			array(1,1,0,0)),
		"C" 			=> array(192,	223,	110,		array(1,1,1,0)),
		"D" 			=> array(224,	239,	1110,		array()),
		"E" 			=> array(240,	254,	1111,		array())
	);
	
	function setIp($ip) {
		
		if( $this->checkValidIp( $ip ) ) {
			
			$tmp = explode(".",$ip);
			foreach( $tmp as $k => $v )
				$this->ip[$k] = ( $v );
		
			$this->error = self::NO_ERROR;
			
		}
		
	}
	
	function getError() {
		
		return $this->error;
		
	}
	
	function checkValidIp( $ip ) {
		
		return (filter_var($ip, FILTER_VALIDATE_IP) !== false);
		
	}
	
	function setNetwork( $ip ) {
		
		$tmp = explode("/",$ip);
		
		$this->setIp($tmp[0]);
		$this->setNetMask(count($tmp)>1?$tmp[1]:24);
		$this->setWildcard();
		$this->setNetId();
		$this->setBroadcast();
		$this->setHosts();
		$this->setClass();
		
	}
	
	function setNetMask( $mask = 24 ) {
		
		$this->nnetmask = (int)$mask;
		
		if( $mask < 1 || $mask > 32 ) $this->error = self::NETMASK_ERROR;
		
		for( $i = 0; $i < 32; $i++ ) {
			$this->netmask[floor($i/8)] += ( $i < $mask ? pow(2, 7-$i%8) : 0 );
		}
		//foreach( $this->netmask as $k => $v ) $this->netmask[$k] = ($v);
		
	}
	
	function setWildcard() {
		
		foreach( $this->netmask as $k => $v ) $this->wildcard[$k] = 255 ^ $v ;
		
	}
	
	function setNetId() {
		
		foreach( $this->netmask as $k => $v ) $this->netid[$k] = $this->ip[$k] & $v ;
		
	}
	
	function setBroadcast() {
		
		foreach( $this->wildcard as $k => $v ) $this->broadcast[$k] = $v | $this->ip[$k] ;
		
	}
	
	function setHosts() {
		
		$this->hostmin = $this->netid;
		$this->hostmin[3]++;
		
		$this->hostmax = $this->broadcast;
		$this->hostmax[3]--;
		
		$this->nhosts = pow(2,32-$this->nnetmask) - 2;
		
	}
	
	function setClass() {
		
		foreach( $this->classes as $c => $vals ) {
			if( $this->ip[0] >= $vals[0] && $this->ip[0] <= $vals[1] ) $this->class = $c;
		}
		
	}
	
	function getBinary($val) {
		
		$tmp = array();
		foreach( $val as $add ) {
			array_push( $tmp, str_pad( decbin($add) , 8, "0", STR_PAD_LEFT ) );
		}
		return implode(".",$tmp);
		
	}
	
	function getDecimal($val) {
		
		$tmp = array();
		foreach( $val as $add ) {
			array_push( $tmp, ($add) );
		}
		return implode(".",$tmp);
		
	}
	
	function getBinaryIp() {
		
		return $this->getBinary( $this->ip );
		
	}
	
	function getBinaryMask() {
		
		return $this->getBinary( $this->netmask );
		
	}
	
	function getBinaryWildcard() {
		
		return $this->getBinary( $this->wildcard );
		
	}
	
	function getBinaryNetID() {
		
		return $this->getBinary( $this->netid );
		
	}
	
	function getBinaryBroadcast() {
		
		return $this->getBinary( $this->broadcast );
		
	}
	
	function getBinaryHostMax() {
		
		return $this->getBinary( $this->hostmax );
		
	}
	
	function getBinaryHostMin() {
		
		return $this->getBinary( $this->hostmin );
		
	}
	
	function getIp() {
		
		return $this->getDecimal( $this->ip );
		
	}
	
	function getMask() {
		
		return $this->getDecimal( $this->netmask );
		
	}
	
	function getWildcard() {
		
		return $this->getDecimal( $this->wildcard );
		
	}
	
	function getNetID() {
		
		return $this->getDecimal( $this->netid );
		
	}
	
	function getBroadcast() {
		
		return $this->getDecimal( $this->broadcast );
		
	}
	
	function getHostMax() {
		
		return $this->getDecimal( $this->hostmax );
		
	}
	
	function getHostMin() {
		
		return $this->getDecimal( $this->hostmin );
		
	}
	
	function getNHosts() {
		
		return $this->nhosts;
		
	}
	
	function getNNetMask() {
		
		return $this->nnetmask;
		
	}
	
	function getClass($pos) {
		
		if( $pos == -1 ) return $this->class;
		else return $this->classes[$this->class][$pos];
		
	}
	
	
}


?>

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<?php

class IPCalc {

const NO_ERROR = 0;

const IP_ERROR = 1;

const NETMASK_ERROR = 2;

private $ip = array(0,0,0,0);

private $netmask = array(0,0,0,0);

private $wildcard = array(0,0,0,0);

private $netid = array(0,0,0,0);

private $broadcast = array(0,0,0,0);

private $hostmin = array(0,0,0,0);

private $hostmax = array(0,0,0,0);

private $nhosts = 0;

private $nnetmask = 24;

private $class = "";

private $error = self::IP_ERROR;

private $classes = array(

//min max 1st octet network=1,hosts=0

"A" => array(1, 126, 0, array(1,0,0,0)),

"A localhost" => array(127, 127, 0, array(1,0,0,0)),

"B" => array(128, 191, 10, array(1,1,0,0)),

"C" => array(192, 223, 110, array(1,1,1,0)),

"D" => array(224, 239, 1110, array()),

"E" => array(240, 254, 1111, array())

);

function setIp($ip) {

if( $this->checkValidIp( $ip ) ) {

$tmp = explode(".",$ip);

foreach( $tmp as $k => $v )

$this->ip[$k] = ( $v );

$this->error = self::NO_ERROR;

}

function getError() {

return $this->error;

}

function checkValidIp( $ip ) {

return (filter_var($ip, FILTER_VALIDATE_IP) !== false);

}

function setNetwork( $ip ) {

$tmp = explode("/",$ip);

$this->setIp($tmp[0]);

$this->setNetMask(count($tmp)>1?$tmp[1]:24);

$this->setWildcard();

$this->setNetId();

$this->setBroadcast();

$this->setHosts();

$this->setClass();

}

function setNetMask( $mask = 24 ) {

$this->nnetmask = (int)$mask;

if( $mask < 1 || $mask > 32 ) $this->error = self::NETMASK_ERROR;

for( $i = 0; $i < 32; $i++ ) {

$this->netmask[floor($i/8)] += ( $i < $mask ? pow(2, 7-$i%8) : 0 );

}

//foreach( $this->netmask as $k => $v ) $this->netmask[$k] = ($v);

}

function setWildcard() {

foreach( $this->netmask as $k => $v ) $this->wildcard[$k] = 255 ^ $v ;

}

function setNetId() {

foreach( $this->netmask as $k => $v ) $this->netid[$k] = $this->ip[$k] & $v ;

}

function setBroadcast() {

foreach( $this->wildcard as $k => $v ) $this->broadcast[$k] = $v | $this->ip[$k] ;

}

function setHosts() {

$this->hostmin = $this->netid;

$this->hostmin[3]++;

$this->hostmax = $this->broadcast;

$this->hostmax[3]--;

$this->nhosts = pow(2,32-$this->nnetmask) - 2;

}

function setClass() {

foreach( $this->classes as $c => $vals ) {

if( $this->ip[0] >= $vals[0] && $this->ip[0] <= $vals[1] ) $this->class = $c;

}

function getBinary($val) {

$tmp = array();

foreach( $val as $add ) {

array_push( $tmp, str_pad( decbin($add) , 8, "0", STR_PAD_LEFT ) );

}

return implode(".",$tmp);

}

function getDecimal($val) {

$tmp = array();

foreach( $val as $add ) {

array_push( $tmp, ($add) );

}

return implode(".",$tmp);

}

function getBinaryIp() {

return $this->getBinary( $this->ip );

}

function getBinaryMask() {

return $this->getBinary( $this->netmask );

}

function getBinaryWildcard() {

return $this->getBinary( $this->wildcard );

}

function getBinaryNetID() {

return $this->getBinary( $this->netid );

}

function getBinaryBroadcast() {

return $this->getBinary( $this->broadcast );

}

function getBinaryHostMax() {

return $this->getBinary( $this->hostmax );

}

function getBinaryHostMin() {

return $this->getBinary( $this->hostmin );

}

function getIp() {

return $this->getDecimal( $this->ip );

}

function getMask() {

return $this->getDecimal( $this->netmask );

}

function getWildcard() {

return $this->getDecimal( $this->wildcard );

}

function getNetID() {

return $this->getDecimal( $this->netid );

}

function getBroadcast() {

return $this->getDecimal( $this->broadcast );

}

function getHostMax() {

return $this->getDecimal( $this->hostmax );

}

function getHostMin() {

return $this->getDecimal( $this->hostmin );

}

function getNHosts() {

return $this->nhosts;

}

function getNNetMask() {

return $this->nnetmask;

}

function getClass($pos) {

if( $pos == -1 ) return $this->class;

else return $this->classes[$this->class][$pos];

}

Ecco di seguito un esempio di utilizzo:

<?php

$ip = new IPCalc();
$ip->setNetwork( "192.168.0.1/25" );
echo $ip->getBinaryIp();
echo "<br>";
echo $ip->getIp();
echo "<br>";
echo $ip->getBinaryMask();
echo "<br>";
echo $ip->getMask();
echo "<br>";
echo $ip->getBinaryWildcard();
echo "<br>";
echo $ip->getWildcard();
echo "<br>";
echo $ip->getBinaryNetID();
echo "<br>";
echo $ip->getNetID();
echo "<br>";
echo $ip->getBinaryBroadcast();
echo "<br>";
echo $ip->getBroadcast();
echo "<br>";
echo $ip->getBinaryHostMax();
echo "<br>";
echo $ip->getHostMax();
echo "<br>";
echo $ip->getBinaryHostMin();
echo "<br>";
echo $ip->getHostMin();
echo "<br>";
echo $ip->getNHosts();

?>

<?php

$ip = new IPCalc();

$ip->setNetwork( "192.168.0.1/25" );

echo $ip->getBinaryIp();

echo " ";

echo $ip->getIp();

echo " ";

echo $ip->getBinaryMask();

echo " ";

echo $ip->getMask();

echo " ";

echo $ip->getBinaryWildcard();

echo " ";

echo $ip->getWildcard();

echo " ";

echo $ip->getBinaryNetID();

echo " ";

echo $ip->getNetID();

echo " ";

echo $ip->getBinaryBroadcast();

echo " ";

echo $ip->getBroadcast();

echo " ";

echo $ip->getBinaryHostMax();

echo " ";

echo $ip->getHostMax();

echo " ";

echo $ip->getBinaryHostMin();

echo " ";

echo $ip->getHostMin();

echo " ";

echo $ip->getNHosts();

Calcolare indirizzo IP e rete in PHP

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