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A set of very nice functions to handle IP Address with gmplib:
The best way to store a range into a database is store:
dNet ..... decimal representation of a Net
dMask .... decimal representation of a Mask
All another parameters can be calculated.
<?
function f_and($a,$b){
$a=gmp_init(strval($a));
$b=gmp_init(strval($b));
$d=gmp_and($a,$b);
return floatval(gmp_strval($d));
}
function f_or($a,$b){
$a=gmp_init(strval($a));
$b=gmp_init(strval($b));
$d=gmp_or($a,$b);
return floatval(gmp_strval($d));
}
function f_xor($a,$b){
$a=gmp_init(strval($a));
$b=gmp_init(strval($b));
$d=gmp_xor($a,$b);
return floatval(gmp_strval($d));
}
function f_not($a){
$a=gmp_init(strval($a));
$d=gmp_strval($a,2);
$d=str_replace("1","x",$d);
$d=str_replace("0","1",$d);
$d=str_replace("x","0",$d);
$d=gmp_init($d,2);
return floatval(gmp_strval($d,10));
}
function f_dec2bin($a){
$a=gmp_init(strval($a));
return gmp_strval($a,2);
}
function f_bin2dec($a){
$a=gmp_init(strval($a),2);
return floatval(gmp_strval($a,10));
}
function f_ip2dec($a){
$d = 0.0;
$b = explode(".", $a,4);
for ($i = 0; $i < 4; $i++) {
$d *= 256.0;
$d += $b[$i];
};
return $d;
}
function f_dec2ip($a){
$b=array(0,0,0,0);
$c = 16777216.0;
$a += 0.0;
for ($i = 0; $i < 4; $i++) {
$k = (int) ($a / $c);
$a -= $c * $k;
$b[$i]= $k;
$c /=256.0;
};
$d=join('.', $b);
return($d);
}
function f_dec2cidr($a){
$a=gmp_init(strval($a));
$d=strlen(str_replace("0","",gmp_strval($a,2)));
return $d;
}
function f_dec2ipall($dNet,$dMask){
$dWildCard=f_not($dMask);
$IpAll["Net"]=f_dec2ip($dNet);
$IpAll["Mask"]=f_dec2ip($dMask);
$IpAll["WildCard"]=f_dec2ip($dWildCard);
$IpAll["Cidr"]=f_dec2cidr($dMask);
$IpAll["Bcast"]=f_dec2ip(f_or($dNet,$dWildCard));
$IpAll["nIp"]=$dWildCard+1;
$IpAll["nIpUtil"]=$dWildCard-1;
if($IpAll["nIp"] > 2){
$IpAll["IpFrom"]=f_dec2ip($dNet+1);
$IpAll["IpTo"]=f_dec2ip($dNet+$dWildCard-1);
}
else
{
$IpAll["IpFrom"]="-";
$IpAll["IpTo"]="-";
$IpAll["nIpUtil"]=0;
}
return $IpAll;
}
?>
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GMP install steps in Mandrake 9.1:
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cp -r /usr/src/php-devel/extensions/gmp /tmp/gmp
cd /tmp/gmp
phpize
./configure
make install
echo "extension = gmp.so" > /etc/php/90_gmp.ini
Restart apache web server.
----------------------------------------------------------
gmp.so is in:
/usr/lib/php/extensions/
look in phpinfo, the string:
/etc/php/90_gmp.ini
Needs these tools:
autoconf
automake
libtool
m4
php430-devel-430-11mdk.rpm
all rpm´s that are envolved to run and compile gmp (*gmp*.rpm)
Some docs about self contained extensions:
/usr/share/doc/php430-devel-430/SELF-CONTAINED-EXTENSIONS
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