be83910651
auto-patch 280-dev-dev01-2024-01-19T16_41_58 * auto-patch 280-dev-dev01-2024-01-19T16_41_58
115 lines
3.1 KiB
PHP
115 lines
3.1 KiB
PHP
<?php
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/**
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* IP Geo Block - DNS lookup
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*
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* @package IP_Geo_Block
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* @author tokkonopapa <tokkonopapa@yahoo.com>
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* @license GPL-3.0
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* @link https://www.ipgeoblock.com/
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* @copyright 2016-2019 tokkonopapa
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*/
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class IP_Geo_Block_Lkup {
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/**
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* Converts IP address to in_addr representation
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*
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* @link https://stackoverflow.com/questions/14459041/inet-pton-replacement-function-for-php-5-2-17-in-windows
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*/
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private static function inet_pton( $ip ) {
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// available on Windows platforms after PHP 5.3.0, need IPv6 support by PHP
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if ( function_exists( 'inet_pton' ) && ( $ip = @inet_pton( $ip ) ) )
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return $ip;
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// ipv4
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elseif ( FALSE !== filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 ) ) {
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if ( FALSE === strpos( $ip, ':' ) ) {
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$ip = pack( 'N', ip2long( $ip ) );
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}
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else {
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$ip = explode( ':', $ip );
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$ip = pack( 'N', ip2long( $ip[ count( $ip ) - 1 ] ) );
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}
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}
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// ipv6
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elseif ( FALSE !== filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6 ) ) {
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$ip = explode( ':', $ip );
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$parts = 8 - count( $ip );
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$res = '';
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$replaced = 0;
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foreach ( $ip as $seg ) {
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if ( $seg != '' ) {
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$res .= str_pad( $seg, 4, '0', STR_PAD_LEFT );
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}
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elseif ( $replaced == 0 ) {
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for ( $i = 0; $i <= $parts; ++$i ) {
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$res .= '0000';
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}
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$replaced = 1;
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}
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elseif ( $replaced == 1 ) {
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$res .= '0000';
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}
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}
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$ip = pack( 'H' . strlen( $res ), $res );
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}
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return $ip;
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}
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/**
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* DNS lookup
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*
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*/
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public static function gethostbyaddr( $ip ) {
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// array( 'nameservers' => array( '8.8.8.8', '8.8.4.4' ) ) // Google public DNS
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// array( 'nameservers' => array( '1.1.1.1', '1.0.0.1' ) ) // APNIC public DNS
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$servers = array( 'nameservers' => apply_filters( IP_GEO_BLOCK::PLUGIN_NAME . '-dns', array() ) );
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if ( ! empty( $servers['nameservers'] ) ) {
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set_include_path( IP_GEO_BLOCK_PATH . 'includes' . PATH_SEPARATOR . get_include_path() );
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require_once IP_GEO_BLOCK_PATH . 'includes/Net/DNS2.php';
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$r = new Net_DNS2_Resolver( $servers );
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try {
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$result = $r->query( $ip, 'PTR' );
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}
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catch ( Net_DNS2_Exception $e ) {
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$result = $e->getMessage();
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}
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if ( isset( $result->answer ) ) {
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foreach ( $result->answer as $obj ) {
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if ( 'PTR' === $obj->type ) {
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return $obj->ptrdname;
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}
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}
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}
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}
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// available on Windows platforms after PHP 5.3.0
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if ( function_exists( 'gethostbyaddr' ) )
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$host = @gethostbyaddr( $ip );
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// if not available
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if ( empty( $host ) && function_exists( 'dns_get_record' ) ) {
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// generate in-addr.arpa notation
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if ( FALSE !== filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 ) ) {
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$ptr = implode( ".", array_reverse( explode( ".", $ip ) ) ) . ".in-addr.arpa";
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}
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elseif ( FALSE !== filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6 ) ) {
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$ptr = self::inet_pton( $ip );
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$ptr = implode(".", array_reverse( str_split( bin2hex( $ptr ) ) ) ) . ".ip6.arpa";
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}
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if ( isset( $ptr ) and $ptr = @dns_get_record( $ptr, DNS_PTR ) ) {
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return $ptr[0]['target'];
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}
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}
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return empty( $host ) ? $ip : $host;
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}
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} |