mirror of
https://github.com/librenms/librenms.git
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df4d9942a2
git-svn-id: http://www.observium.org/svn/observer/trunk@229 61d68cd4-352d-0410-923a-c4978735b2b8
561 lines
16 KiB
PHP
561 lines
16 KiB
PHP
<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* This file contains the implementation of the Net_IPv6 class
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*
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* PHP versions 4 and 5
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*
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* LICENSE: This source file is subject to the New BSD license, that is
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* available through the world-wide-web at http://www.opensource.org/licenses/bsd-license.php
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* If you did not receive a copy of the new BSDlicense and are unable
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* to obtain it through the world-wide-web, please send a note to
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* license@php.net so we can mail you a copy immediately
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*
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* @category Net
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* @package Net_IPv6
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* @author Alexander Merz <alexander.merz@web.de>
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* @copyright 2003-2005 The PHP Group
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* @license http://www.opensource.org/licenses/bsd-license.php
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* @version CVS: $Id: IPv6.php,v 1.15 2007/11/16 00:22:28 alexmerz Exp $
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* @link http://pear.php.net/package/Net_IPv6
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*/
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// {{{ constants
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/**
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* Error message if netmask bits was not found
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* @see isInNetmask
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*/
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define("NET_IPV6_NO_NETMASK_MSG", "Netmask length not found");
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/**
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* Error code if netmask bits was not found
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* @see isInNetmask
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*/
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define("NET_IPV6_NO_NETMASK", 10);
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/**
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* Address Type: Unassigned (RFC 1884, Section 2.3)
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* @see getAddressType()
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*/
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define("NET_IPV6_UNASSIGNED", 1);
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/**
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* Address Type: Reserved (RFC 1884, Section 2.3)
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* @see getAddressType()
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*/
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define("NET_IPV6_RESERVED", 11);
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/**
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* Address Type: Reserved for NSAP Allocation (RFC 1884, Section 2.3)
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* @see getAddressType()
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*/
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define("NET_IPV6_RESERVED_NSAP", 12);
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/**
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* Address Type: Reserved for IPX Allocation (RFC 1884, Section 2.3)
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* @see getAddressType()
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*/
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define("NET_IPV6_RESERVED_IPX", 13);
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/**
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* Address Type: Reserved for Geographic-Based Unicast Addresses (RFC 1884, Section 2.3)
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* @see getAddressType()
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*/
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define("NET_IPV6_RESERVED_UNICAST_GEOGRAPHIC", 14);
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/**
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* Address Type: Provider-Based Unicast Address (RFC 1884, Section 2.3)
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* @see getAddressType()
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*/
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define("NET_IPV6_UNICAST_PROVIDER", 22);
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/**
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* Address Type: Multicast Addresses (RFC 1884, Section 2.3)
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* @see getAddressType()
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*/
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define("NET_IPV6_MULTICAST", 31);
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/**
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* Address Type: Link Local Use Addresses (RFC 1884, Section 2.3)
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* @see getAddressType()
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*/
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define("NET_IPV6_LOCAL_LINK", 42);
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/**
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* Address Type: Link Local Use Addresses (RFC 1884, Section 2.3)
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* @see getAddressType()
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*/
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define("NET_IPV6_LOCAL_SITE", 43);
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/**
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* Address Type: address can not assigned to a specific type
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* @see getAddressType()
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*/
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define("NET_IPV6_UNKNOWN_TYPE", 1001);
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// }}}
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// {{{ Net_IPv6
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/**
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* Class to validate and to work with IPv6 addresses.
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*
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* @category Net
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* @package Net_IPv6
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* @author Alexander Merz <alexander.merz@web.de>
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* @copyright 2003-2005 The PHP Group
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* @license http://www.opensource.org/licenses/bsd-license.php
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* @version CVS: $Id: IPv6.php,v 1.15 2007/11/16 00:22:28 alexmerz Exp $
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* @link http://pear.php.net/package/Net_IPv6
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* @author elfrink at introweb dot nl
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* @author Josh Peck <jmp at joshpeck dot org>
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*/
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class Net_IPv6 {
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// {{{ removeNetmaskBits()
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/**
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* Removes a possible existing netmask specification at an IP addresse.
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*
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* @param String $ip the (compressed) IP as Hex representation
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* @return String the IP without netmask length
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* @since 1.1.0
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* @access public
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* @static
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*/
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function removeNetmaskSpec($ip) {
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$addr = $ip;
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if(false !== strpos($ip, '/')) {
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$elements = explode('/', $ip);
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if(2 == count($elements)) {
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$addr = $elements[0];
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}
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}
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return $addr;
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}
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/**
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* Returns a possible existing netmask specification at an IP addresse.
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*
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* @param String $ip the (compressed) IP as Hex representation
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* @return String the netmask spec
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* @since 1.1.0
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* @access public
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* @static
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*/
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function getNetmaskSpec($ip) {
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$spec = '';
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if(false !== strpos($ip, '/')) {
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$elements = explode('/', $ip);
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if(2 == count($elements)) {
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$spec = $elements[1];
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}
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}
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return $spec;
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}
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// }}}
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// {{{ getNetmask()
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/**
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* Calculates the network prefix based on the netmask bits.
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*
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* @param String $ip the (compressed) IP in Hex format
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* @param int $bits if the number of netmask bits is not part of the IP
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* you must provide the number of bits
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* @return String the network prefix
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* @since 1.1.0
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* @access public
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* @static
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*/
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function getNetmask($ip, $bits = null) {
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if(null==$bits) {
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$elements = explode('/', $ip);
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if(2 == count($elements)) {
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$addr = $elements[0];
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$bits = $elements[1];
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} else {
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require_once 'PEAR.php';
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return PEAR::raiseError(NET_IPV6_NO_NETMASK_MSG, NET_IPV6_NO_NETMASK);
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}
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} else {
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$addr = $ip;
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}
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$addr = Net_IPv6::uncompress($addr);
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$binNetmask = str_repeat('1', $bits).str_repeat('0', 128 - $bits);
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return Net_IPv6::_bin2Ip(Net_IPv6::_ip2Bin($addr) & $binNetmask);
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}
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// }}}
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// {{{ isInNetmask()
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/**
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* Checks if an (compressed) IP is in a specific address space.
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*
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* IF the IP does not contains the number of netmask bits (F8000::FFFF/16)
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* then you have to use the $bits parameter.
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*
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* @param String $ip the IP to check (eg. F800::FFFF)
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* @param String $netmask the netmask (eg F800::)
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* @param int $bits the number of netmask bits to compare, if not given in $ip
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* @return boolean true if $ip is in the netmask
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* @since 1.1.0
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* @access public
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* @static
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*/
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function isInNetmask($ip, $netmask, $bits=null) {
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// try to get the bit count
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if(null == $bits) {
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$elements = explode('/', $ip);
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if(2 == count($elements)) {
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$ip = $elements[0];
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$bits = $elements[1];
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} else if(null == $bits) {
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$elements = explode('/', $netmask);
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if(2 == count($elements)) {
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$netmask = $elements[0];
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$bits = $elements[1];
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}
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if(null == $bits) {
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require_once 'PEAR.php';
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return PEAR::raiseError(NET_IPV6_NO_NETMASK_MSG, NET_IPV6_NO_NETMASK);
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}
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}
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}
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$binIp = Net_IPv6::_ip2Bin(Net_IPv6::removeNetmaskSpec($ip));
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$binNetmask = Net_IPv6::_ip2Bin(Net_IPv6::removeNetmaskSpec($netmask));
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if(null != $bits && "" != $bits && 0 == strncmp( $binNetmask, $binIp, $bits)) {
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return true;
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}
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return false;
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}
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// }}}
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// {{{ getAddressType()
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/**
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* Returns the type of an IPv6 address.
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*
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* RFC 1883, Section 2.3 describes several types of addresses in
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* the IPv6 addresse space.
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* Several addresse types are markers for reserved spaces and as consequence
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* a subject to change.
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*
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* @param String $ip the IP address in Hex format, compressed IPs are allowed
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* @return int one of the addresse type constants
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* @access public
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* @since 1.1.0
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* @static
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*
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* @see NET_IPV6_UNASSIGNED
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* @see NET_IPV6_RESERVED
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* @see NET_IPV6_RESERVED_NSAP
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* @see NET_IPV6_RESERVED_IPX
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* @see NET_IPV6_RESERVED_UNICAST_GEOGRAPHIC
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* @see NET_IPV6_UNICAST_PROVIDER
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* @see NET_IPV6_MULTICAST
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* @see NET_IPV6_LOCAL_LINK
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* @see NET_IPV6_LOCAL_SITE
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* @see NET_IPV6_UNKNOWN_TYPE
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*/
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function getAddressType($ip) {
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$ip = Net_IPv6::removeNetmaskSpec($ip);
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$binip = Net_IPv6::_ip2Bin($ip);
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if(0 == strncmp('1111111010', $binip, 10)) {
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return NET_IPV6_LOCAL_LINK;
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} else if(0 == strncmp('1111111011', $binip, 10)) {
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return NET_IPV6_LOCAL_SITE;
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} else if (0 == strncmp('111111100', $binip, 9)) {
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return NET_IPV6_UNASSIGNED;
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} else if (0 == strncmp('11111111', $binip, 8)) {
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return NET_IPV6_MULTICAST;
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} else if (0 == strncmp('00000000', $binip, 8)) {
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return NET_IPV6_RESERVED;
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} else if (0 == strncmp('00000001', $binip, 8) ||
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0 == strncmp('1111110', $binip, 7)) {
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return NET_IPV6_UNASSIGNED;
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} else if (0 == strncmp('0000001', $binip, 7)) {
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return NET_IPV6_RESERVED_NSAP;
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} else if (0 == strncmp('0000010', $binip, 7)) {
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return NET_IPV6_RESERVED_IPX;;
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} else if (0 == strncmp('0000011', $binip, 7) ||
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0 == strncmp('111110', $binip, 6) ||
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0 == strncmp('11110', $binip, 5) ||
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0 == strncmp('00001', $binip, 5) ||
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0 == strncmp('1110', $binip, 4) ||
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0 == strncmp('0001', $binip, 4) ||
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0 == strncmp('001', $binip, 3) ||
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0 == strncmp('011', $binip, 3) ||
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0 == strncmp('101', $binip, 3) ||
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0 == strncmp('110', $binip, 3)) {
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return NET_IPV6_UNASSIGNED;
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} else if (0 == strncmp('010', $binip, 3)) {
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return NET_IPV6_UNICAST_PROVIDER;
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} else if (0 == strncmp('100', $binip, 3)) {
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return NET_IPV6_RESERVED_UNICAST_GEOGRAPHIC;
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}
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return NET_IPV6_UNKNOWN_TYPE;
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}
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// }}}
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// {{{ Uncompress()
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/**
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* Uncompresses an IPv6 adress
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*
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* RFC 2373 allows you to compress zeros in an adress to '::'. This
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* function expects an valid IPv6 adress and expands the '::' to
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* the required zeros.
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*
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* Example: FF01::101 -> FF01:0:0:0:0:0:0:101
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* ::1 -> 0:0:0:0:0:0:0:1
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*
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* @access public
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* @see Compress()
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* @static
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* @param string $ip a valid IPv6-adress (hex format)
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* @return string the uncompressed IPv6-adress (hex format)
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*/
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function Uncompress($ip) {
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$netmask = Net_IPv6::getNetmaskSpec($ip);
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$uip = Net_IPv6::removeNetmaskSpec($ip);
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$c1 = -1;
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$c2 = -1;
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if (false !== strpos($uip, '::') ) {
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list($ip1, $ip2) = explode('::', $uip);
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if(""==$ip1) {
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$c1 = -1;
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} else {
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$pos = 0;
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if(0 < ($pos = substr_count($ip1, ':'))) {
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$c1 = $pos;
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} else {
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$c1 = 0;
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}
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}
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if(""==$ip2) {
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$c2 = -1;
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} else {
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$pos = 0;
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if(0 < ($pos = substr_count($ip2, ':'))) {
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$c2 = $pos;
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} else {
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$c2 = 0;
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}
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}
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if(strstr($ip2, '.')) {
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$c2++;
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}
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if(-1 == $c1 && -1 == $c2) { // ::
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$uip = "0:0:0:0:0:0:0:0";
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} else if(-1==$c1) { // ::xxx
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$fill = str_repeat('0:', 7-$c2);
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$uip = str_replace('::', $fill, $uip);
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} else if(-1==$c2) { // xxx::
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$fill = str_repeat(':0', 7-$c1);
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$uip = str_replace('::', $fill, $uip);
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} else { // xxx::xxx
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$fill = str_repeat(':0:', 6-$c2-$c1);
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$uip = str_replace('::', $fill, $uip);
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$uip = str_replace('::', ':', $uip);
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}
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}
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if('' != $netmask) {
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$uip = $uip.'/'.$netmask;
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}
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return $uip;
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}
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// }}}
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// {{{ Compress()
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/**
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* Compresses an IPv6 adress
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*
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* RFC 2373 allows you to compress zeros in an adress to '::'. This
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* function expects an valid IPv6 adress and compresses successive zeros
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* to '::'
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*
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* Example: FF01:0:0:0:0:0:0:101 -> FF01::101
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* 0:0:0:0:0:0:0:1 -> ::1
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*
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* @access public
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* @see Uncompress()
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* @static
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* @param string $ip a valid IPv6-adress (hex format)
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* @return string the compressed IPv6-adress (hex format)
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* @author elfrink at introweb dot nl
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*/
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function Compress($ip) {
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$netmask = Net_IPv6::getNetmaskSpec($ip);
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$ip = Net_IPv6::removeNetmaskSpec($ip);
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if (!strstr($ip, '::')) {
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$ipp = explode(':',$ip);
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for($i=0; $i<count($ipp); $i++) {
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$ipp[$i] = dechex(hexdec($ipp[$i]));
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}
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$cip = ':' . join(':',$ipp) . ':';
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preg_match_all("/(:0)+/", $cip, $zeros);
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if (count($zeros[0])>0) {
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$match = '';
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foreach($zeros[0] as $zero) {
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if (strlen($zero) > strlen($match))
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$match = $zero;
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}
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$cip = preg_replace('/' . $match . '/', ':', $cip, 1);
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}
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$cip = preg_replace('/((^:)|(:$))/', '' ,$cip);
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$cip = preg_replace('/((^:)|(:$))/', '::' ,$cip);
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}
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if('' != $netmask) {
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$cip = $cip.'/'.$netmask;
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}
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return $cip;
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}
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// }}}
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// {{{ SplitV64()
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/**
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* Splits an IPv6 adress into the IPv6 and a possible IPv4 part
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*
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* RFC 2373 allows you to note the last two parts of an IPv6 adress as
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* an IPv4 compatible adress
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*
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* Example: 0:0:0:0:0:0:13.1.68.3
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* 0:0:0:0:0:FFFF:129.144.52.38
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*
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* @access public
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* @static
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* @param string $ip a valid IPv6-adress (hex format)
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* @return array [0] contains the IPv6 part, [1] the IPv4 part (hex format)
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*/
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function SplitV64($ip) {
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$ip = Net_IPv6::removeNetmaskSpec($ip);
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$ip = Net_IPv6::Uncompress($ip);
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if (strstr($ip, '.')) {
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$pos = strrpos($ip, ':');
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$ip{$pos} = '_';
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$ipPart = explode('_', $ip);
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return $ipPart;
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} else {
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return array($ip, "");
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}
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}
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// }}}
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// {{{ checkIPv6()
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/**
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* Checks an IPv6 adress
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*
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* Checks if the given IP is IPv6-compatible
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*
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* @access public
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* @static
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* @param string $ip a valid IPv6-adress
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* @return boolean true if $ip is an IPv6 adress
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*/
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function checkIPv6($ip) {
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$ip = Net_IPv6::removeNetmaskSpec($ip);
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$ipPart = Net_IPv6::SplitV64($ip);
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$count = 0;
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if (!empty($ipPart[0])) {
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$ipv6 =explode(':', $ipPart[0]);
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for ($i = 0; $i < count($ipv6); $i++) {
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$dec = hexdec($ipv6[$i]);
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$hex = strtoupper(preg_replace("/^[0]{1,3}(.*[0-9a-fA-F])$/", "\\1", $ipv6[$i]));
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if ($ipv6[$i] >= 0 && $dec <= 65535 && $hex == strtoupper(dechex($dec))) {
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$count++;
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}
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}
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if (8 == $count) {
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return true;
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} elseif (6 == $count and !empty($ipPart[1])) {
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$ipv4 = explode('.',$ipPart[1]);
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$count = 0;
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for ($i = 0; $i < count($ipv4); $i++) {
|
|
if ($ipv4[$i] >= 0 && (integer)$ipv4[$i] <= 255 && preg_match("/^\d{1,3}$/", $ipv4[$i])) {
|
|
$count++;
|
|
}
|
|
}
|
|
if (4 == $count) {
|
|
return true;
|
|
}
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _ip2Bin()
|
|
|
|
/**
|
|
* Converts an IPv6 address from Hex into Binary representation.
|
|
*
|
|
* @param String $ip the IP to convert (a:b:c:d:e:f:g:h), compressed IPs are allowed
|
|
* @return String the binary representation
|
|
* @access private
|
|
@ @since 1.1.0
|
|
*/
|
|
function _ip2Bin($ip) {
|
|
$binstr = '';
|
|
$ip = Net_IPv6::removeNetmaskSpec($ip);
|
|
$ip = Net_IPv6::Uncompress($ip);
|
|
$parts = explode(':', $ip);
|
|
foreach($parts as $v) {
|
|
$str = base_convert($v, 16, 2);
|
|
$binstr .= str_pad($str, 16, '0', STR_PAD_LEFT);
|
|
}
|
|
return $binstr;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _bin2Ip()
|
|
|
|
/**
|
|
* Converts an IPv6 address from Binary into Hex representation.
|
|
*
|
|
* @param String $ip the IP as binary
|
|
* @return String the uncompressed Hex representation
|
|
* @access private
|
|
@ @since 1.1.0
|
|
*/
|
|
function _bin2Ip($bin) {
|
|
$ip = "";
|
|
if(strlen($bin)<128) {
|
|
$bin = str_pad($str, 128, '0', STR_PAD_LEFT);
|
|
}
|
|
$parts = str_split($bin, "16");
|
|
foreach($parts as $v) {
|
|
$str = base_convert($v, 2, 16);
|
|
$ip .= $str.":";
|
|
}
|
|
$ip = substr($ip, 0,-1);
|
|
return $ip;
|
|
}
|
|
|
|
// }}}
|
|
}
|
|
// }}}
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* c-hanging-comment-ender-p: nil
|
|
* End:
|
|
*/
|
|
|
|
?>
|