IP 주소 변환 소스

<?

$ip_str = "192.168.2.100/27";

$arr = get_ipaddr_info($ip_str);

print_r($arr);

function get_ipaddr_info($ip_str)

{

$result_arr = array();

$result_arr["result"] = "fail";

if(!strstr($ip_str,"/")) return $result_arr;

$result_arr["result"] = "success";

$result_arr["ip_str"] = $ip_str;

$temp = explode("/", $ip_str);

$ip = trim($temp[0]);

$cidr = trim($temp[1]);

$result_arr["ip"] = $ip;

$result_arr["cidr"] = $cidr;

$subnet = cidr2netmask($cidr);

$network = cidr2network($ip, $cidr);

$result_arr["subnet"] = $subnet;

$result_arr["network"] = $network;

$max = ip2long('255.255.255.255');

$desc_ip = ip2long($network);

$desc_subnet = ip2long($subnet);

$range_bo = $desc_subnet ^ $max;

$range_to = ($desc_ip | $range_bo) - 1;

$end_ipaddr = long2ip($range_to);

$result_arr["end_ipaddr"] = $end_ipaddr;

// IP RANGE check

$start_num = ip2long($network);

$end_num = ip2long($end_ipaddr);

$ip_range_arr = array();

for($a = $start_num ; $a <= $end_num ; $a++)

{

$ip_range_arr[count($ip_range_arr)] = long2ip($a);

} // for($a = $start_num ; $a <= $end_num ; 4a++)

$result_arr["ip_range"] = $ip_range_arr;

return $result_arr;

} // function get_ipaddr_info($ip_str)

function cidr2netmask($cidr)

{

    $bin = "";

    for( $i = 1; $i <= 32; $i++ )

    $bin .= $cidr >= $i ? '1' : '0';

    $netmask = long2ip(bindec($bin));

    if ( $netmask == "0.0.0.0")

    return false;

    return $netmask;

}

function cidr2network($ip, $cidr)

{

    $network = long2ip((ip2long($ip)) & ((-1 << (32 - (int)$cidr))));

    return $network;

}

?>