function ip_addr_in_network($ip, $networkDef)
{
if (preg_match("/[a-zA-Z]/", $networkDef) == 1) {
$networkDef = getAddrByHost($networkDef, '3');
}
$ipDec = ip_addr_dec($ip);
if ($ipDec < 1) {
return false;
}
$ipBin = ip_addr_decbin($ipDec);
//echo "ip : $ipBin\n";
$nDef = explode('/', $networkDef, 2);
if (count($nDef) < 2) {
$nDef[1] = '32';
}
// 255.255.255.255
$nIpDec = ip_addr_dec($nDef[0]);
//if ($nIpDec < 1) return false;
$nIpBin = ip_addr_decbin($nIpDec);
//echo "netip : $nIpBin\n";
$nMaskDec = ip_addr_dec($nDef[1]);
$nMaskBin = $nMaskDec > 1 ? ip_addr_decbin($nMaskDec) : str_repeat('1', (int) $nDef[1]) . str_repeat('0', 32 - (int) $nDef[1]);
//echo "netmask: $nMaskBin\n";
for ($i = 0; $i < 32; ++$i) {
if ($nMaskBin[$i] == '1' && $ipBin[$i] != $nIpBin[$i]) {
return false;
}
}
return true;
}
function ip_addr_network_add_sub($network, $sub_ip)
{
# simple OR for 2 binary strings, eg.
# 11000000101010000000000100000000
# 00000000000000000000000010000010
# => 11000000101010000000000110000010
$binary_net = ip_addr_decbin(ip_addr_dec($network));
$binary_sub = ip_addr_decbin(ip_addr_dec($sub_ip));
if (strLen($binary_net) != 32 || strLen($binary_sub) != 32) {
return false;
}
$binary_ip = '';
for ($i = 0; $i < 32; ++$i) {
$binary_ip .= $binary_net[$i] == '1' || $binary_sub[$i] == '1' ? '1' : '0';
}
$ip = long2ip(binDec($binary_ip));
return $ip ? $ip : false;
}
