source: trunk/src/inc/Network.class.php@ 7768

<?php
/*
 * Project: NodeMap2.0
 * File: Network.class.php
 * Purpose: Contains a network, calculates everything like broadcast IP, netmask etc.
 */

class Network {
        public $netmaskNumber;          // Netmask number
        public $netmaskBinary;          // Binary value of netmask address
        public $netmaskDecimal;         // Decimal value of netmask address
        public $wildcardBinary;         // Binary value of wildcard address
        public $wildcardDecimal;        // Decimal value of wildcard address
        public $networkBinary;          // Binary value of network address
        public $networkDecimal;         // Decimal value of network address
        public $broadcastBinary;        // Binary value of broadcast address
        public $broadcastDecimal;       // Decimal value of broadcast address
        public $hostminBinary;          // Binary value of hostmin address
        public $hostminDecimal;         // Decimal value of hostmin address
        public $hostmaxBinary;          // Binary value of hostmax address
        public $hostmaxDecimal;         // Decimal value of hostmax address
        public $numberHosts;            // Number of possible hosts in this network

        /*
         * Function: __construct (constructor)
         * Description: Creating a new Network object
         * Parameters: string $ip_address, int $ip_netmask
         * Returns: -
         */
        public function __construct($ip_address, $ip_netmask) {
                // Binary value of given IP address
                $binary = $this->binIP($ip_address);

                // Let's store the IP netmask number
                $this->netmaskNumber = $ip_netmask;

                // Netmask address
                $this->netmaskBinary = str_repeat('1', $ip_netmask) . str_repeat('0', 32 - $ip_netmask);
                $this->netmaskDecimal = $this->decIP($this->netmaskBinary);

                // Wildcard address
                $this->wildcardBinary = str_repeat('0', $ip_netmask) . str_repeat('1', 32 - $ip_netmask);
                $this->wildcardDecimal = $this->decIP($this->wildcardBinary);

                // Network address
                $this->networkBinary = substr($binary, 0, $ip_netmask) . str_repeat('0', 32 - $ip_netmask);
                $this->networkDecimal = $this->decIP($this->networkBinary);

                // Broadcast address
                $this->broadcastBinary = substr($binary, 0, $ip_netmask) . str_repeat('1', 32 - $ip_netmask);
                $this->broadcastDecimal = $this->decIP($this->broadcastBinary);

                // HostMin address
                $this->hostminBinary = substr($binary, 0, $ip_netmask) . str_repeat('0', 31 - $ip_netmask) . '1';
                $this->hostminDecimal = $this->decIP($this->hostminBinary);

                // HostMax address
                $this->hostmaxBinary = substr($binary, 0, $ip_netmask) . str_repeat('1', 31 - $ip_netmask) . '0';
                $this->hostmaxDecimal = $this->decIP($this->hostmaxBinary);

                // Numbers of hosts
                $this->numberHosts = bindec(substr($this->broadcastBinary, $ip_netmask)) - bindec(substr($this->networkBinary, $ip_netmask)) - 1;
        }

        /*
         * Function: binIP
         * Description: Converts a IP address like 192.168.0.1 to it's binary value
         * Parameters: string $address
         * Returns: string $address_binary
         */
        function binIP($address) {
                $address_array = explode('.', $address);
                $address_binary = '';

                for ($i = 0; $i < 4; $i++) {
                        // Create binary value
                        $binary = decbin($address_array[$i]);

                        // Trim value to the length
                        $binary = trim($binary, 8);

                        // Add zeros at the left to fit to $size
                        $binary = str_repeat('0', 8 - strlen($binary)) . $binary;

                        $address_binary .= $binary;
                }

                return $address_binary;
        }

        /*
         * Function: decIP
         * Description: Converts a binary IP address to it's decimal value like 192.168.0.1
         * Parameters: string $binary
         * Returns: string $address
         */
        function decIP($binary) {
                $address_array = array();

                for ($i = 0; $i < 4; $i++) {
                        $block = substr($binary, $i * 8, 8) . '<br/>';
                        $address_array[] = bindec(intval($block));
                }

                $address = implode('.', $address_array); 

                return $address;
        }

        /*
         * Function: compare
         * Description: Checks if to networks are the same using network IP address
         * Parameters: Network $otherNetwork
         * Returns: true if the networks are the same, otherwise false
         */
        function compare(Network $otherNetwork) {
                $check = false;

                // Compare the network address
                if ($this->networkDecimal == $otherNetwork->networkDecimal) {
                        $check = true;
                }

                return $check;
        }

        /*
         * Function: inNetwork
         * Description: Checks if the given IP is in the IP range of the current network
         * Parameters: string $ipDecimal
         * Returns: true if the IP address is in the IP range, otherwise false
         */
        function inNetwork($ipDecimal) {
                $check = true;

                // Check if given IP is bigger than our HostMin IP Address
                if (ip2long($ipDecimal) < ip2long($this->hostminDecimal)) {
                        $check = false;
                }

                // Check if given IP is smaller than our HostMax IP Address
                if (ip2long($ipDecimal) > ip2long($this->hostmaxDecimal)) {
                        $check = false;
                }
                                
                return $check;
        }
}
?>