forked from leftypol/leftypol
Add this library I found
This commit is contained in:
Michael Foster
parent
3e57bb04d7
commit
f53348d7c8
4 changed files with 1226 additions and 0 deletions
293
inc/lib/IP/Lifo/IP/BC.php
Executable file
293
inc/lib/IP/Lifo/IP/BC.php
Executable file
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@ -0,0 +1,293 @@
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<?php
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/**
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* This file is part of the Lifo\IP PHP Library.
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*
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* (c) Jason Morriss <lifo2013@gmail.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Lifo\IP;
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/**
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* BCMath helper class.
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*
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* Provides a handful of BCMath routines that are not included in the native
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* PHP library.
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*
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* Note: The Bitwise functions operate on fixed byte boundaries. For example,
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* comparing the following numbers uses X number of bits:
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* 0xFFFF and 0xFF will result in comparison of 16 bits.
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* 0xFFFFFFFF and 0xF will result in comparison of 32 bits.
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* etc...
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*
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*/
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abstract class BC
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{
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// Some common (maybe useless) constants
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const MAX_INT_32 = '2147483647'; // 7FFFFFFF
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const MAX_UINT_32 = '4294967295'; // FFFFFFFF
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const MAX_INT_64 = '9223372036854775807'; // 7FFFFFFFFFFFFFFF
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const MAX_UINT_64 = '18446744073709551615'; // FFFFFFFFFFFFFFFF
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const MAX_INT_96 = '39614081257132168796771975167'; // 7FFFFFFFFFFFFFFFFFFFFFFF
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const MAX_UINT_96 = '79228162514264337593543950335'; // FFFFFFFFFFFFFFFFFFFFFFFF
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const MAX_INT_128 = '170141183460469231731687303715884105727'; // 7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
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const MAX_UINT_128 = '340282366920938463463374607431768211455'; // FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
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/**
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* BC Math function to convert a HEX string into a DECIMAL
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*/
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public static function bchexdec($hex)
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{
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if (strlen($hex) == 1) {
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return hexdec($hex);
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}
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$remain = substr($hex, 0, -1);
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$last = substr($hex, -1);
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return bcadd(bcmul(16, self::bchexdec($remain), 0), hexdec($last), 0);
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}
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/**
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* BC Math function to convert a DECIMAL string into a BINARY string
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*/
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public static function bcdecbin($dec, $pad = null)
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{
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$bin = '';
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while ($dec) {
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$m = bcmod($dec, 2);
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$dec = bcdiv($dec, 2, 0);
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$bin = abs($m) . $bin;
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}
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return $pad ? sprintf("%0{$pad}s", $bin) : $bin;
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}
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/**
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* BC Math function to convert a BINARY string into a DECIMAL string
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*/
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public static function bcbindec($bin)
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{
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$dec = '0';
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for ($i=0, $j=strlen($bin); $i<$j; $i++) {
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$dec = bcmul($dec, '2', 0);
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$dec = bcadd($dec, $bin[$i], 0);
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}
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return $dec;
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}
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/**
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* BC Math function to convert a BINARY string into a HEX string
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*/
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public static function bcbinhex($bin, $pad = 0)
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{
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return self::bcdechex(self::bcbindec($bin));
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}
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/**
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* BC Math function to convert a DECIMAL into a HEX string
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*/
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public static function bcdechex($dec)
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{
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$last = bcmod($dec, 16);
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$remain = bcdiv(bcsub($dec, $last, 0), 16, 0);
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return $remain == 0 ? dechex($last) : self::bcdechex($remain) . dechex($last);
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}
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/**
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* Bitwise AND two arbitrarily large numbers together.
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*/
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public static function bcand($left, $right)
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{
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$len = self::_bitwise($left, $right);
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$value = '';
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for ($i=0; $i<$len; $i++) {
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$value .= (($left{$i} + 0) & ($right{$i} + 0)) ? '1' : '0';
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}
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return self::bcbindec($value != '' ? $value : '0');
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}
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/**
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* Bitwise OR two arbitrarily large numbers together.
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*/
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public static function bcor($left, $right)
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{
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$len = self::_bitwise($left, $right);
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$value = '';
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for ($i=0; $i<$len; $i++) {
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$value .= (($left{$i} + 0) | ($right{$i} + 0)) ? '1' : '0';
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}
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return self::bcbindec($value != '' ? $value : '0');
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}
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/**
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* Bitwise XOR two arbitrarily large numbers together.
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*/
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public static function bcxor($left, $right)
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{
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$len = self::_bitwise($left, $right);
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$value = '';
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for ($i=0; $i<$len; $i++) {
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$value .= (($left{$i} + 0) ^ ($right{$i} + 0)) ? '1' : '0';
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}
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return self::bcbindec($value != '' ? $value : '0');
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}
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/**
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* Bitwise NOT two arbitrarily large numbers together.
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*/
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public static function bcnot($left, $bits = null)
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{
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$right = 0;
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$len = self::_bitwise($left, $right, $bits);
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$value = '';
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for ($i=0; $i<$len; $i++) {
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$value .= $left{$i} == '1' ? '0' : '1';
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}
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return self::bcbindec($value);
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}
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/**
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* Shift number to the left
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*
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* @param integer $bits Total bits to shift
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*/
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public static function bcleft($num, $bits) {
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return bcmul($num, bcpow('2', $bits));
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}
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/**
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* Shift number to the right
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*
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* @param integer $bits Total bits to shift
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*/
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public static function bcright($num, $bits) {
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return bcdiv($num, bcpow('2', $bits));
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}
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/**
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* Determine how many bits are needed to store the number rounded to the
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* nearest bit boundary.
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*/
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public static function bits_needed($num, $boundary = 4)
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{
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$bits = 0;
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while ($num > 0) {
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$num = bcdiv($num, '2', 0);
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$bits++;
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}
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// round to nearest boundrary
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return $boundary ? ceil($bits / $boundary) * $boundary : $bits;
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}
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/**
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* BC Math function to return an arbitrarily large random number.
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*/
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public static function bcrand($min, $max = null)
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{
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if ($max === null) {
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$max = $min;
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$min = 0;
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}
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// swap values if $min > $max
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if (bccomp($min, $max) == 1) {
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list($min,$max) = array($max,$min);
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}
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return bcadd(
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bcmul(
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bcdiv(
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mt_rand(0, mt_getrandmax()),
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mt_getrandmax(),
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strlen($max)
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),
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bcsub(
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bcadd($max, '1'),
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$min
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)
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),
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$min
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);
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}
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/**
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* Computes the natural logarithm using a series.
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* @author Thomas Oldbury.
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* @license Public domain.
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*/
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public static function bclog($num, $iter = 10, $scale = 100)
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{
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$log = "0.0";
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for($i = 0; $i < $iter; $i++) {
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$pow = 1 + (2 * $i);
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$mul = bcdiv("1.0", $pow, $scale);
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$fraction = bcmul($mul, bcpow(bcsub($num, "1.0", $scale) / bcadd($num, "1.0", $scale), $pow, $scale), $scale);
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$log = bcadd($fraction, $log, $scale);
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}
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return bcmul("2.0", $log, $scale);
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}
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/**
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* Computes the base2 log using baseN log.
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*/
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public static function bclog2($num, $iter = 10, $scale = 100)
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{
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return bcdiv(self::bclog($num, $iter, $scale), self::bclog("2", $iter, $scale), $scale);
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}
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public static function bcfloor($num)
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{
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if (substr($num, 0, 1) == '-') {
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return bcsub($num, 1, 0);
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}
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return bcadd($num, 0, 0);
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}
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public static function bcceil($num)
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{
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if (substr($num, 0, 1) == '-') {
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return bcsub($num, 0, 0);
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}
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return bcadd($num, 1, 0);
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}
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/**
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* Compare two numbers and return -1, 0, 1 depending if the LEFT number is
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* < = > the RIGHT.
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*
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* @param string|integer $left Left side operand
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* @param string|integer $right Right side operand
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* @return integer Return -1,0,1 for <=> comparison
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*/
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public static function cmp($left, $right)
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{
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// @todo could an optimization be done to determine if a normal 32bit
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// comparison could be done instead of using bccomp? But would
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// the number verification cause too much overhead to be useful?
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return bccomp($left, $right, 0);
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}
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/**
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* Internal function to prepare for bitwise operations
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*/
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private static function _bitwise(&$left, &$right, $bits = null)
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{
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if ($bits === null) {
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$bits = max(self::bits_needed($left), self::bits_needed($right));
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}
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$left = self::bcdecbin($left);
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$right = self::bcdecbin($right);
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$len = max(strlen($left), strlen($right), (int)$bits);
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$left = sprintf("%0{$len}s", $left);
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$right = sprintf("%0{$len}s", $right);
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return $len;
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}
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}
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706
inc/lib/IP/Lifo/IP/CIDR.php
Executable file
706
inc/lib/IP/Lifo/IP/CIDR.php
Executable file
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@ -0,0 +1,706 @@
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<?php
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/**
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* This file is part of the Lifo\IP PHP Library.
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*
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* (c) Jason Morriss <lifo2013@gmail.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Lifo\IP;
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/**
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* CIDR Block helper class.
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*
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* Most routines can be used statically or by instantiating an object and
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* calling its methods.
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*
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* Provides routines to do various calculations on IP addresses and ranges.
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* Convert to/from CIDR to ranges, etc.
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*/
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class CIDR
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{
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const INTERSECT_NO = 0;
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const INTERSECT_YES = 1;
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const INTERSECT_LOW = 2;
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const INTERSECT_HIGH = 3;
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protected $start;
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protected $end;
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protected $prefix;
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protected $version;
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protected $istart;
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protected $iend;
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private $cache;
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/**
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* Create a new CIDR object.
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*
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* The IP range can be arbitrary and does not have to fall on a valid CIDR
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* range. Some methods will return different values depending if you ignore
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* the prefix or not. By default all prefix sensitive methods will assume
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* the prefix is used.
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*
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* @param string $cidr An IP address (1.2.3.4), CIDR block (1.2.3.4/24),
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* or range "1.2.3.4-1.2.3.10"
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* @param string $end Ending IP in range if no cidr/prefix is given
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*/
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public function __construct($cidr, $end = null)
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{
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if ($end !== null) {
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$this->setRange($cidr, $end);
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} else {
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$this->setCidr($cidr);
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}
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}
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/**
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* Returns the string representation of the CIDR block.
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*/
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public function __toString()
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{
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// do not include the prefix if its a single IP
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try {
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if ($this->isTrueCidr() && (
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($this->version == 4 and $this->prefix != 32) ||
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($this->version == 6 and $this->prefix != 128)
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)
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) {
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return $this->start . '/' . $this->prefix;
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}
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} catch (\Exception $e) {
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// isTrueCidr() calls getRange which can throw an exception
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}
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if (strcmp($this->start, $this->end) == 0) {
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return $this->start;
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}
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return $this->start . ' - ' . $this->end;
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}
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public function __clone()
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{
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// do not clone the cache. No real reason why. I just want to keep the
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// memory foot print as low as possible, even though this is trivial.
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$this->cache = array();
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}
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/**
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* Set an arbitrary IP range.
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* The closest matching prefix will be calculated but the actual range
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* stored in the object can be arbitrary.
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* @param string $start Starting IP or combination "start-end" string.
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* @param string $end Ending IP or null.
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*/
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public function setRange($ip, $end = null)
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{
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if (strpos($ip, '-') !== false) {
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list($ip, $end) = array_map('trim', explode('-', $ip, 2));
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}
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if (false === filter_var($ip, FILTER_VALIDATE_IP) ||
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false === filter_var($end, FILTER_VALIDATE_IP)) {
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throw new \InvalidArgumentException("Invalid IP range \"$ip-$end\"");
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}
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// determine version (4 or 6)
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$this->version = (false === filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) ? 6 : 4;
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$this->istart = IP::inet_ptod($ip);
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$this->iend = IP::inet_ptod($end);
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// fix order
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if (bccomp($this->istart, $this->iend) == 1) {
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list($this->istart, $this->iend) = array($this->iend, $this->istart);
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list($ip, $end) = array($end, $ip);
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}
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$this->start = $ip;
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$this->end = $end;
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// calculate real prefix
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$len = $this->version == 4 ? 32 : 128;
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$this->prefix = $len - strlen(BC::bcdecbin(BC::bcxor($this->istart, $this->iend)));
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}
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/**
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* Returns true if the current IP is a true cidr block
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*/
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public function isTrueCidr()
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{
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return $this->start == $this->getNetwork() && $this->end == $this->getBroadcast();
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}
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/**
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* Set the CIDR block.
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*
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* The prefix length is optional and will default to 32 ot 128 depending on
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* the version detected.
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*
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* @param string $cidr CIDR block string, eg: "192.168.0.0/24" or "2001::1/64"
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* @throws \InvalidArgumentException If the CIDR block is invalid
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*/
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public function setCidr($cidr)
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{
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if (strpos($cidr, '-') !== false) {
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return $this->setRange($cidr);
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}
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list($ip, $bits) = array_pad(array_map('trim', explode('/', $cidr, 2)), 2, null);
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if (false === filter_var($ip, FILTER_VALIDATE_IP)) {
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throw new \InvalidArgumentException("Invalid IP address \"$cidr\"");
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}
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// determine version (4 or 6)
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$this->version = (false === filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) ? 6 : 4;
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$this->start = $ip;
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$this->istart = IP::inet_ptod($ip);
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if ($bits !== null and $bits !== '') {
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$this->prefix = $bits;
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} else {
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$this->prefix = $this->version == 4 ? 32 : 128;
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}
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if (($this->prefix < 0)
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|| ($this->prefix > 32 and $this->version == 4)
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|| ($this->prefix > 128 and $this->version == 6)) {
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throw new \InvalidArgumentException("Invalid IP address \"$cidr\"");
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}
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$this->end = $this->getBroadcast();
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$this->iend = IP::inet_ptod($this->end);
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$this->cache = array();
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}
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|
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/**
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* Get the IP version. 4 or 6.
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*
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* @return integer
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*/
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public function getVersion()
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{
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return $this->version;
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}
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|
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/**
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* Get the prefix.
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*
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* Always returns the "proper" prefix, even if the IP range is arbitrary.
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*
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* @return integer
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*/
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public function getPrefix()
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{
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return $this->prefix;
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}
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/**
|
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* Return the starting presentational IP or Decimal value.
|
||||
*
|
||||
* Ignores prefix
|
||||
*/
|
||||
public function getStart($decimal = false)
|
||||
{
|
||||
return $decimal ? $this->istart : $this->start;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the ending presentational IP or Decimal value.
|
||||
*
|
||||
* Ignores prefix
|
||||
*/
|
||||
public function getEnd($decimal = false)
|
||||
{
|
||||
return $decimal ? $this->iend : $this->end;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the next presentational IP or Decimal value (following the
|
||||
* broadcast address of the current CIDR block).
|
||||
*/
|
||||
public function getNext($decimal = false)
|
||||
{
|
||||
$next = bcadd($this->getEnd(true), '1');
|
||||
return $decimal ? $next : new self(IP::inet_dtop($next));
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns true if the IP is an IPv4
|
||||
*
|
||||
* @return boolean
|
||||
*/
|
||||
public function isIPv4()
|
||||
{
|
||||
return $this->version == 4;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns true if the IP is an IPv6
|
||||
*
|
||||
* @return boolean
|
||||
*/
|
||||
public function isIPv6()
|
||||
{
|
||||
return $this->version == 6;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the cidr notation for the subnet block.
|
||||
*
|
||||
* This is useful for when you want a string representation of the IP/prefix
|
||||
* and the starting IP is not on a valid network boundrary (eg: Displaying
|
||||
* an IP from an interface).
|
||||
*
|
||||
* @return string IP in CIDR notation "ipaddr/prefix"
|
||||
*/
|
||||
public function getCidr()
|
||||
{
|
||||
return $this->start . '/' . $this->prefix;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the [low,high] range of the CIDR block
|
||||
*
|
||||
* Prefix sensitive.
|
||||
*
|
||||
* @param boolean $ignorePrefix If true the arbitrary start-end range is
|
||||
* returned. default=false.
|
||||
*/
|
||||
public function getRange($ignorePrefix = false)
|
||||
{
|
||||
$range = $ignorePrefix
|
||||
? array($this->start, $this->end)
|
||||
: self::cidr_to_range($this->start, $this->prefix);
|
||||
// watch out for IP '0' being converted to IPv6 '::'
|
||||
if ($range[0] == '::' and strpos($range[1], ':') == false) {
|
||||
$range[0] = '0.0.0.0';
|
||||
}
|
||||
return $range;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the IP in its fully expanded form.
|
||||
*
|
||||
* For example: 2001::1 == 2007:0000:0000:0000:0000:0000:0000:0001
|
||||
*
|
||||
* @see IP::inet_expand
|
||||
*/
|
||||
public function getExpanded()
|
||||
{
|
||||
return IP::inet_expand($this->start);
|
||||
}
|
||||
|
||||
/**
|
||||
* Get network IP of the CIDR block
|
||||
*
|
||||
* Prefix sensitive.
|
||||
*
|
||||
* @param boolean $ignorePrefix If true the arbitrary start-end range is
|
||||
* returned. default=false.
|
||||
*/
|
||||
public function getNetwork($ignorePrefix = false)
|
||||
{
|
||||
// micro-optimization to prevent calling getRange repeatedly
|
||||
$k = $ignorePrefix ? 1 : 0;
|
||||
if (!isset($this->cache['range'][$k])) {
|
||||
$this->cache['range'][$k] = $this->getRange($ignorePrefix);
|
||||
}
|
||||
return $this->cache['range'][$k][0];
|
||||
}
|
||||
|
||||
/**
|
||||
* Get broadcast IP of the CIDR block
|
||||
*
|
||||
* Prefix sensitive.
|
||||
*
|
||||
* @param boolean $ignorePrefix If true the arbitrary start-end range is
|
||||
* returned. default=false.
|
||||
*/
|
||||
public function getBroadcast($ignorePrefix = false)
|
||||
{
|
||||
// micro-optimization to prevent calling getRange repeatedly
|
||||
$k = $ignorePrefix ? 1 : 0;
|
||||
if (!isset($this->cache['range'][$k])) {
|
||||
$this->cache['range'][$k] = $this->getRange($ignorePrefix);
|
||||
}
|
||||
return $this->cache['range'][$k][1];
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the network mask based on the prefix.
|
||||
*
|
||||
*/
|
||||
public function getMask()
|
||||
{
|
||||
return self::prefix_to_mask($this->prefix, $this->version);
|
||||
}
|
||||
|
||||
/**
|
||||
* Get total hosts within CIDR range
|
||||
*
|
||||
* Prefix sensitive.
|
||||
*
|
||||
* @param boolean $ignorePrefix If true the arbitrary start-end range is
|
||||
* returned. default=false.
|
||||
*/
|
||||
public function getTotal($ignorePrefix = false)
|
||||
{
|
||||
// micro-optimization to prevent calling getRange repeatedly
|
||||
$k = $ignorePrefix ? 1 : 0;
|
||||
if (!isset($this->cache['range'][$k])) {
|
||||
$this->cache['range'][$k] = $this->getRange($ignorePrefix);
|
||||
}
|
||||
return bcadd(bcsub(IP::inet_ptod($this->cache['range'][$k][1]),
|
||||
IP::inet_ptod($this->cache['range'][$k][0])), '1');
|
||||
}
|
||||
|
||||
public function intersects($cidr)
|
||||
{
|
||||
return self::cidr_intersect((string)$this, $cidr);
|
||||
}
|
||||
|
||||
/**
|
||||
* Determines the intersection between an IP (with optional prefix) and a
|
||||
* CIDR block.
|
||||
*
|
||||
* The IP will be checked against the CIDR block given and will either be
|
||||
* inside or outside the CIDR completely, or partially.
|
||||
*
|
||||
* NOTE: The caller should explicitly check against the INTERSECT_*
|
||||
* constants because this method will return a value > 1 even for partial
|
||||
* matches.
|
||||
*
|
||||
* @param mixed $ip The IP/cidr to match
|
||||
* @param mixed $cidr The CIDR block to match within
|
||||
* @return integer Returns an INTERSECT_* constant
|
||||
* @throws \InvalidArgumentException if either $ip or $cidr is invalid
|
||||
*/
|
||||
public static function cidr_intersect($ip, $cidr)
|
||||
{
|
||||
// use fixed length HEX strings so we can easily do STRING comparisons
|
||||
// instead of using slower bccomp() math.
|
||||
list($lo,$hi) = array_map(function($v){ return sprintf("%032s", IP::inet_ptoh($v)); }, CIDR::cidr_to_range($ip));
|
||||
list($min,$max) = array_map(function($v){ return sprintf("%032s", IP::inet_ptoh($v)); }, CIDR::cidr_to_range($cidr));
|
||||
|
||||
/** visualization of logic used below
|
||||
lo-hi = $ip to check
|
||||
min-max = $cidr block being checked against
|
||||
--- --- --- lo --- --- hi --- --- --- --- --- IP/prefix to check
|
||||
--- min --- --- max --- --- --- --- --- --- --- Partial "LOW" match
|
||||
--- --- --- --- --- min --- --- max --- --- --- Partial "HIGH" match
|
||||
--- --- --- --- min max --- --- --- --- --- --- No match "NO"
|
||||
--- --- --- --- --- --- --- --- min --- max --- No match "NO"
|
||||
min --- max --- --- --- --- --- --- --- --- --- No match "NO"
|
||||
--- --- min --- --- --- --- max --- --- --- --- Full match "YES"
|
||||
*/
|
||||
|
||||
// IP is exact match or completely inside the CIDR block
|
||||
if ($lo >= $min and $hi <= $max) {
|
||||
return self::INTERSECT_YES;
|
||||
}
|
||||
|
||||
// IP is completely outside the CIDR block
|
||||
if ($max < $lo or $min > $hi) {
|
||||
return self::INTERSECT_NO;
|
||||
}
|
||||
|
||||
// @todo is it useful to return LOW/HIGH partial matches?
|
||||
|
||||
// IP matches the lower end
|
||||
if ($max <= $hi and $min <= $lo) {
|
||||
return self::INTERSECT_LOW;
|
||||
}
|
||||
|
||||
// IP matches the higher end
|
||||
if ($min >= $lo and $max >= $hi) {
|
||||
return self::INTERSECT_HIGH;
|
||||
}
|
||||
|
||||
return self::INTERSECT_NO;
|
||||
}
|
||||
|
||||
/**
|
||||
* Converts an IPv4 or IPv6 CIDR block into its range.
|
||||
*
|
||||
* @todo May not be the fastest way to do this.
|
||||
*
|
||||
* @static
|
||||
* @param string $cidr CIDR block or IP address string.
|
||||
* @param integer|null $bits If /bits is not specified on string they can be
|
||||
* passed via this parameter instead.
|
||||
* @return array A 2 element array with the low, high range
|
||||
*/
|
||||
public static function cidr_to_range($cidr, $bits = null)
|
||||
{
|
||||
if (strpos($cidr, '/') !== false) {
|
||||
list($ip, $_bits) = array_pad(explode('/', $cidr, 2), 2, null);
|
||||
} else {
|
||||
$ip = $cidr;
|
||||
$_bits = $bits;
|
||||
}
|
||||
|
||||
if (false === filter_var($ip, FILTER_VALIDATE_IP)) {
|
||||
throw new \InvalidArgumentException("IP address \"$cidr\" is invalid");
|
||||
}
|
||||
|
||||
// force bit length to 32 or 128 depending on type of IP
|
||||
$bitlen = (false === filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) ? 128 : 32;
|
||||
|
||||
if ($bits === null) {
|
||||
// if no prefix is given use the length of the binary string which
|
||||
// will give us 32 or 128 and result in a single IP being returned.
|
||||
$bits = $_bits !== null ? $_bits : $bitlen;
|
||||
}
|
||||
|
||||
if ($bits > $bitlen) {
|
||||
throw new \InvalidArgumentException("IP address \"$cidr\" is invalid");
|
||||
}
|
||||
|
||||
$ipdec = IP::inet_ptod($ip);
|
||||
$ipbin = BC::bcdecbin($ipdec, $bitlen);
|
||||
|
||||
// calculate network
|
||||
$netmask = BC::bcbindec(str_pad(str_repeat('1',$bits), $bitlen, '0'));
|
||||
$ip1 = BC::bcand($ipdec, $netmask);
|
||||
|
||||
// calculate "broadcast" (not technically a broadcast in IPv6)
|
||||
$ip2 = BC::bcor($ip1, BC::bcnot($netmask));
|
||||
|
||||
return array(IP::inet_dtop($ip1), IP::inet_dtop($ip2));
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the CIDR string from the range given
|
||||
*/
|
||||
public static function range_to_cidr($start, $end)
|
||||
{
|
||||
$cidr = new CIDR($start, $end);
|
||||
return (string)$cidr;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the maximum prefix length that would fit the IP address given.
|
||||
*
|
||||
* This is useful to determine how my bit would be needed to store the IP
|
||||
* address when you don't already have a prefix for the IP.
|
||||
*
|
||||
* @example 216.240.32.0 would return 27
|
||||
*
|
||||
* @param string $ip IP address without prefix
|
||||
* @param integer $bits Maximum bits to check; defaults to 32 for IPv4 and 128 for IPv6
|
||||
*/
|
||||
public static function max_prefix($ip, $bits = null)
|
||||
{
|
||||
static $mask = array();
|
||||
|
||||
$ver = (false === filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) ? 6 : 4;
|
||||
$max = $ver == 6 ? 128 : 32;
|
||||
if ($bits === null) {
|
||||
$bits = $max;
|
||||
|
||||
}
|
||||
|
||||
$int = IP::inet_ptod($ip);
|
||||
while ($bits > 0) {
|
||||
// micro-optimization; calculate mask once ...
|
||||
if (!isset($mask[$ver][$bits-1])) {
|
||||
// 2^$max - 2^($max - $bits);
|
||||
if ($ver == 4) {
|
||||
$mask[$ver][$bits-1] = pow(2, $max) - pow(2, $max - ($bits-1));
|
||||
} else {
|
||||
$mask[$ver][$bits-1] = bcsub(bcpow(2, $max), bcpow(2, $max - ($bits-1)));
|
||||
}
|
||||
}
|
||||
|
||||
$m = $mask[$ver][$bits-1];
|
||||
//printf("%s/%d: %s & %s == %s\n", $ip, $bits-1, BC::bcdecbin($m, 32), BC::bcdecbin($int, 32), BC::bcdecbin(BC::bcand($int, $m)));
|
||||
//echo "$ip/", $bits-1, ": ", IP::inet_dtop($m), " ($m) & $int == ", BC::bcand($int, $m), "\n";
|
||||
if (bccomp(BC::bcand($int, $m), $int) != 0) {
|
||||
return $bits;
|
||||
}
|
||||
$bits--;
|
||||
}
|
||||
return $bits;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a contiguous list of true CIDR blocks that span the range given.
|
||||
*
|
||||
* Note: It's not a good idea to call this with IPv6 addresses. While it may
|
||||
* work for certain ranges this can be very slow. Also an IPv6 list won't be
|
||||
* as accurate as an IPv4 list.
|
||||
*
|
||||
* @example
|
||||
* range_to_cidrlist(192.168.0.0, 192.168.0.15) ==
|
||||
* 192.168.0.0/28
|
||||
* range_to_cidrlist(192.168.0.0, 192.168.0.20) ==
|
||||
* 192.168.0.0/28
|
||||
* 192.168.0.16/30
|
||||
* 192.168.0.20/32
|
||||
*/
|
||||
public static function range_to_cidrlist($start, $end)
|
||||
{
|
||||
$ver = (false === filter_var($start, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) ? 6 : 4;
|
||||
$start = IP::inet_ptod($start);
|
||||
$end = IP::inet_ptod($end);
|
||||
|
||||
$len = $ver == 4 ? 32 : 128;
|
||||
$log2 = $ver == 4 ? log(2) : BC::bclog(2);
|
||||
|
||||
$list = array();
|
||||
while (BC::cmp($end, $start) >= 0) { // $end >= $start
|
||||
$prefix = self::max_prefix(IP::inet_dtop($start), $len);
|
||||
if ($ver == 4) {
|
||||
$diff = $len - floor( log($end - $start + 1) / $log2 );
|
||||
} else {
|
||||
// this is not as accurate due to the bclog function
|
||||
$diff = bcsub($len, BC::bcfloor(bcdiv(BC::bclog(bcadd(bcsub($end, $start), '1')), $log2)));
|
||||
}
|
||||
|
||||
if ($prefix < $diff) {
|
||||
$prefix = $diff;
|
||||
}
|
||||
|
||||
$list[] = IP::inet_dtop($start) . "/" . $prefix;
|
||||
|
||||
if ($ver == 4) {
|
||||
$start += pow(2, $len - $prefix);
|
||||
} else {
|
||||
$start = bcadd($start, bcpow(2, $len - $prefix));
|
||||
}
|
||||
}
|
||||
return $list;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return an list of optimized CIDR blocks by collapsing adjacent CIDR
|
||||
* blocks into larger blocks.
|
||||
*
|
||||
* @param array $cidrs List of CIDR block strings or objects
|
||||
* @param integer $maxPrefix Maximum prefix to allow
|
||||
* @return array Optimized list of CIDR objects
|
||||
*/
|
||||
public static function optimize_cidrlist($cidrs, $maxPrefix = 32)
|
||||
{
|
||||
// all indexes must be a CIDR object
|
||||
$cidrs = array_map(function($o){ return $o instanceof CIDR ? $o : new CIDR($o); }, $cidrs);
|
||||
// sort CIDR blocks in proper order so we can easily loop over them
|
||||
$cidrs = self::cidr_sort($cidrs);
|
||||
|
||||
$list = array();
|
||||
while ($cidrs) {
|
||||
$c = array_shift($cidrs);
|
||||
$start = $c->getStart();
|
||||
|
||||
$max = bcadd($c->getStart(true), $c->getTotal());
|
||||
|
||||
// loop through each cidr block until its ending range is more than
|
||||
// the current maximum.
|
||||
while (!empty($cidrs) and $cidrs[0]->getStart(true) <= $max) {
|
||||
$b = array_shift($cidrs);
|
||||
$newmax = bcadd($b->getStart(true), $b->getTotal());
|
||||
if ($newmax > $max) {
|
||||
$max = $newmax;
|
||||
}
|
||||
}
|
||||
|
||||
// add the new cidr range to the optimized list
|
||||
$list = array_merge($list, self::range_to_cidrlist($start, IP::inet_dtop(bcsub($max, '1'))));
|
||||
}
|
||||
|
||||
return $list;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sort the list of CIDR blocks, optionally with a custom callback function.
|
||||
*
|
||||
* @param array $cidrs A list of CIDR blocks (strings or objects)
|
||||
* @param Closure $callback Optional callback to perform the sorting.
|
||||
* See PHP usort documentation for more details.
|
||||
*/
|
||||
public static function cidr_sort($cidrs, $callback = null)
|
||||
{
|
||||
// all indexes must be a CIDR object
|
||||
$cidrs = array_map(function($o){ return $o instanceof CIDR ? $o : new CIDR($o); }, $cidrs);
|
||||
|
||||
if ($callback === null) {
|
||||
$callback = function($a, $b) {
|
||||
if (0 != ($o = BC::cmp($a->getStart(true), $b->getStart(true)))) {
|
||||
return $o; // < or >
|
||||
}
|
||||
if ($a->getPrefix() == $b->getPrefix()) {
|
||||
return 0;
|
||||
}
|
||||
return $a->getPrefix() < $b->getPrefix() ? -1 : 1;
|
||||
};
|
||||
} elseif (!($callback instanceof \Closure) or !is_callable($callback)) {
|
||||
throw new \InvalidArgumentException("Invalid callback in CIDR::cidr_sort, expected Closure, got " . gettype($callback));
|
||||
}
|
||||
|
||||
usort($cidrs, $callback);
|
||||
return $cidrs;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the Prefix bits from the IPv4 mask given.
|
||||
*
|
||||
* This is only valid for IPv4 addresses since IPv6 addressing does not
|
||||
* have a concept of network masks.
|
||||
*
|
||||
* Example: 255.255.255.0 == 24
|
||||
*
|
||||
* @param string $mask IPv4 network mask.
|
||||
*/
|
||||
public static function mask_to_prefix($mask)
|
||||
{
|
||||
if (false === filter_var($mask, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
|
||||
throw new \InvalidArgumentException("Invalid IP netmask \"$mask\"");
|
||||
}
|
||||
return strrpos(IP::inet_ptob($mask, 32), '1') + 1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the network mask for the prefix given.
|
||||
*
|
||||
* Normally this is only useful for IPv4 addresses but you can generate a
|
||||
* mask for IPv6 addresses as well, only because its mathematically
|
||||
* possible.
|
||||
*
|
||||
* @param integer $prefix CIDR prefix bits (0-128)
|
||||
* @param integer $version IP version. If null the version will be detected
|
||||
* based on the prefix length given.
|
||||
*/
|
||||
public static function prefix_to_mask($prefix, $version = null)
|
||||
{
|
||||
if ($version === null) {
|
||||
$version = $prefix > 32 ? 6 : 4;
|
||||
}
|
||||
if ($prefix < 0 or $prefix > 128) {
|
||||
throw new \InvalidArgumentException("Invalid prefix length \"$prefix\"");
|
||||
}
|
||||
if ($version != 4 and $version != 6) {
|
||||
throw new \InvalidArgumentException("Invalid version \"$version\". Must be 4 or 6");
|
||||
}
|
||||
|
||||
if ($version == 4) {
|
||||
return long2ip($prefix == 0 ? 0 : (0xFFFFFFFF >> (32 - $prefix)) << (32 - $prefix));
|
||||
} else {
|
||||
return IP::inet_dtop($prefix == 0 ? 0 : BC::bcleft(BC::bcright(BC::MAX_UINT_128, 128-$prefix), 128-$prefix));
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Return true if the $ip given is a true CIDR block.
|
||||
*
|
||||
* A true CIDR block is one where the $ip given is the actual Network
|
||||
* address and broadcast matches the prefix appropriately.
|
||||
*/
|
||||
public static function cidr_is_true($ip)
|
||||
{
|
||||
$ip = new CIDR($ip);
|
||||
return $ip->isTrueCidr();
|
||||
}
|
||||
}
|
||||
207
inc/lib/IP/Lifo/IP/IP.php
Executable file
207
inc/lib/IP/Lifo/IP/IP.php
Executable file
|
|
@ -0,0 +1,207 @@
|
|||
<?php
|
||||
/**
|
||||
* This file is part of the Lifo\IP PHP Library.
|
||||
*
|
||||
* (c) Jason Morriss <lifo2013@gmail.com>
|
||||
*
|
||||
* For the full copyright and license information, please view the LICENSE
|
||||
* file that was distributed with this source code.
|
||||
*/
|
||||
namespace Lifo\IP;
|
||||
|
||||
/**
|
||||
* IP Address helper class.
|
||||
*
|
||||
* Provides routines to translate IPv4 and IPv6 addresses between human readable
|
||||
* strings, decimal, hexidecimal and binary.
|
||||
*
|
||||
* Requires BCmath extension and IPv6 PHP support
|
||||
*/
|
||||
abstract class IP
|
||||
{
|
||||
/**
|
||||
* Convert a human readable (presentational) IP address string into a decimal string.
|
||||
*/
|
||||
public static function inet_ptod($ip)
|
||||
{
|
||||
// shortcut for IPv4 addresses
|
||||
if (strpos($ip, ':') === false && strpos($ip, '.') !== false) {
|
||||
return sprintf('%u', ip2long($ip));
|
||||
}
|
||||
|
||||
// remove any cidr block notation
|
||||
if (($o = strpos($ip, '/')) !== false) {
|
||||
$ip = substr($ip, 0, $o);
|
||||
}
|
||||
|
||||
// unpack into 4 32bit integers
|
||||
$parts = unpack('N*', inet_pton($ip));
|
||||
foreach ($parts as &$part) {
|
||||
if ($part < 0) {
|
||||
// convert signed int into unsigned
|
||||
$part = sprintf('%u', $part);
|
||||
//$part = bcadd($part, '4294967296');
|
||||
}
|
||||
}
|
||||
|
||||
// add each 32bit integer to the proper bit location in our big decimal
|
||||
$decimal = $parts[4]; // << 0
|
||||
$decimal = bcadd($decimal, bcmul($parts[3], '4294967296')); // << 32
|
||||
$decimal = bcadd($decimal, bcmul($parts[2], '18446744073709551616')); // << 64
|
||||
$decimal = bcadd($decimal, bcmul($parts[1], '79228162514264337593543950336')); // << 96
|
||||
|
||||
return $decimal;
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert a decimal string into a human readable IP address.
|
||||
*/
|
||||
public static function inet_dtop($decimal, $expand = false)
|
||||
{
|
||||
$parts = array();
|
||||
$parts[1] = bcdiv($decimal, '79228162514264337593543950336', 0); // >> 96
|
||||
$decimal = bcsub($decimal, bcmul($parts[1], '79228162514264337593543950336'));
|
||||
$parts[2] = bcdiv($decimal, '18446744073709551616', 0); // >> 64
|
||||
$decimal = bcsub($decimal, bcmul($parts[2], '18446744073709551616'));
|
||||
$parts[3] = bcdiv($decimal, '4294967296', 0); // >> 32
|
||||
$decimal = bcsub($decimal, bcmul($parts[3], '4294967296'));
|
||||
$parts[4] = $decimal; // >> 0
|
||||
|
||||
foreach ($parts as &$part) {
|
||||
if (bccomp($part, '2147483647') == 1) {
|
||||
$part = bcsub($part, '4294967296');
|
||||
}
|
||||
$part = (int) $part;
|
||||
}
|
||||
|
||||
// if the first 96bits is all zeros then we can safely assume we
|
||||
// actually have an IPv4 address. Even though it's technically possible
|
||||
// you're not really ever going to see an IPv6 address in the range:
|
||||
// ::0 - ::ffff
|
||||
// It's feasible to see an IPv6 address of "::", in which case the
|
||||
// caller is going to have to account for that on their own.
|
||||
if (($parts[1] | $parts[2] | $parts[3]) == 0) {
|
||||
$ip = long2ip($parts[4]);
|
||||
} else {
|
||||
$packed = pack('N4', $parts[1], $parts[2], $parts[3], $parts[4]);
|
||||
$ip = inet_ntop($packed);
|
||||
}
|
||||
|
||||
// Turn IPv6 to IPv4 if it's IPv4
|
||||
if (preg_match('/^::\d+\./', $ip)) {
|
||||
return substr($ip, 2);
|
||||
}
|
||||
|
||||
return $expand ? self::inet_expand($ip) : $ip;
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert a human readable (presentational) IP address into a HEX string.
|
||||
*/
|
||||
public static function inet_ptoh($ip)
|
||||
{
|
||||
return bin2hex(inet_pton($ip));
|
||||
//return BC::bcdechex(self::inet_ptod($ip));
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert a human readable (presentational) IP address into a BINARY string.
|
||||
*/
|
||||
public static function inet_ptob($ip, $bits = 128)
|
||||
{
|
||||
return BC::bcdecbin(self::inet_ptod($ip), $bits);
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert a binary string into an IP address (presentational) string.
|
||||
*/
|
||||
public static function inet_btop($bin)
|
||||
{
|
||||
return self::inet_dtop(BC::bcbindec($bin));
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert a HEX string into a human readable (presentational) IP address
|
||||
*/
|
||||
public static function inet_htop($hex)
|
||||
{
|
||||
return self::inet_dtop(BC::bchexdec($hex));
|
||||
}
|
||||
|
||||
/**
|
||||
* Expand an IP address. IPv4 addresses are returned as-is.
|
||||
*
|
||||
* Example:
|
||||
* 2001::1 expands to 2001:0000:0000:0000:0000:0000:0000:0001
|
||||
* ::127.0.0.1 expands to 0000:0000:0000:0000:0000:0000:7f00:0001
|
||||
* 127.0.0.1 expands to 127.0.0.1
|
||||
*/
|
||||
public static function inet_expand($ip)
|
||||
{
|
||||
// strip possible cidr notation off
|
||||
if (($pos = strpos($ip, '/')) !== false) {
|
||||
$ip = substr($ip, 0, $pos);
|
||||
}
|
||||
$bytes = unpack('n*', inet_pton($ip));
|
||||
if (count($bytes) > 2) {
|
||||
return implode(':', array_map(function ($b) {
|
||||
return sprintf("%04x", $b);
|
||||
}, $bytes));
|
||||
}
|
||||
return $ip;
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert an IPv4 address into an IPv6 address.
|
||||
*
|
||||
* One use-case for this is IP 6to4 tunnels used in networking.
|
||||
*
|
||||
* @example
|
||||
* to_ipv4("10.10.10.10") == a0a:a0a
|
||||
*
|
||||
* @param string $ip IPv4 address.
|
||||
* @param boolean $mapped If true a Full IPv6 address is returned within the
|
||||
* official ipv4to6 mapped space "0:0:0:0:0:ffff:x:x"
|
||||
*/
|
||||
public static function to_ipv6($ip, $mapped = false)
|
||||
{
|
||||
if (!self::isIPv4($ip)) {
|
||||
throw new \InvalidArgumentException("Invalid IPv4 address \"$ip\"");
|
||||
}
|
||||
|
||||
$num = IP::inet_ptod($ip);
|
||||
$o1 = dechex($num >> 16);
|
||||
$o2 = dechex($num & 0x0000FFFF);
|
||||
|
||||
return $mapped ? "0:0:0:0:0:ffff:$o1:$o2" : "$o1:$o2";
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns true if the IP address is a valid IPv4 address
|
||||
*/
|
||||
public static function isIPv4($ip)
|
||||
{
|
||||
return $ip === filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns true if the IP address is a valid IPv6 address
|
||||
*/
|
||||
public static function isIPv6($ip)
|
||||
{
|
||||
return $ip === filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6);
|
||||
}
|
||||
|
||||
/**
|
||||
* Compare two IP's (v4 or v6) and return -1, 0, 1 if the first is < = >
|
||||
* the second.
|
||||
*
|
||||
* @param string $ip1 IP address
|
||||
* @param string $ip2 IP address to compare against
|
||||
* @return integer Return -1,0,1 depending if $ip1 is <=> $ip2
|
||||
*/
|
||||
public static function cmp($ip1, $ip2)
|
||||
{
|
||||
return bccomp(self::inet_ptod($ip1), self::inet_ptod($ip2), 0);
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue