mirror of
https://gh.wpcy.net/https://github.com/webguyio/dam-spam.git
synced 2026-05-25 03:03:57 +08:00
117 lines
No EOL
3.5 KiB
PHP
117 lines
No EOL
3.5 KiB
PHP
<?php
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if ( !defined( 'ABSPATH' ) ) {
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status_header( 404 );
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exit;
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}
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class dam_spam_check_valid_ip {
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private static function _is_fake_ip( $client_ip ) {
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$client_host = '';
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$host_by_ip = gethostbyaddr( $client_ip );
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if ( self::_is_ipv6( $client_ip ) ) {
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if ( self::_is_ipv6( $host_by_ip ) && inet_pton( $client_ip ) === inet_pton( $host_by_ip ) ) {
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return false;
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} else {
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$record = dns_get_record( $host_by_ip, DNS_AAAA );
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if ( empty( $record ) || empty( $record[0]['ipv6'] ) ) {
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return true;
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} else {
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return inet_pton( $client_ip ) !== inet_pton( $record[0]['ipv6'] );
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}
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}
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}
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if ( empty( $client_host ) ) {
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$ip_by_host = gethostbyname( $host_by_ip );
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if ( $ip_by_host === $host_by_ip ) {
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return false;
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}
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} else {
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if ( $host_by_ip === $client_ip ) {
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return true;
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}
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$ip_by_host = gethostbyname( $client_host );
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}
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if ( strpos( $client_ip, $this->_cut_ip( $ip_by_host ) ) === false ) {
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return true;
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}
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return false;
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}
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private static function _is_ipv6( $ip ) {
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return filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6 ) !== false;
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}
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private static function _is_ipv4( $ip ) {
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return filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 ) !== false;
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}
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public function process( $ip, &$stats = array(), &$options = array(), &$post = array() ) {
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if ( empty( $ip ) ) {
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return esc_html__( 'Invalid IP: ', 'dam-spam' ) . $ip;
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}
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if ( strpos( $ip, ':' ) === false && strpos( $ip, '.' ) === false ) {
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return esc_html__( 'Invalid IP: ', 'dam-spam' ) . $ip;
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}
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if ( defined( 'AF_INET6' ) && strpos( $ip, ':' ) !== false ) {
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try {
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if ( !@inet_pton( $ip ) ) {
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return esc_html__( 'Invalid IP: ', 'dam-spam' ) . $ip;
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}
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} catch ( Exception $e ) {
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return esc_html__( 'Invalid IP: ', 'dam-spam' ) . $ip;
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}
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}
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if ( $ip == '127.0.0.1' ) {
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return esc_html__( 'Accessing Site Through localhost', 'dam-spam' );
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}
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$priv = array(
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array( '100000000000', '100255255255' ),
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array( '172016000000', '172031255255' ),
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array( '192168000000', '192168255255' )
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);
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$ip2 = dam_spam_module::ip2numstr( $ip );
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foreach ( $priv as $ips ) {
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if ( $ip2 >= $ips[0] && $ip2 <= $ips[1] ) {
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return esc_html__( 'Local IP Address: ', 'dam-spam' ) . $ip;
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}
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if ( $ip2 < $ips[1] ) {
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break;
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}
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}
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$lip = "127.0.0.1";
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if ( substr( $ip, 0, 2 ) == 'FB' || substr( $ip, 0, 2 ) == 'fb' ) {
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return esc_html__( 'Local IP Address: ', 'dam-spam' ) . $ip;
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}
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if ( array_key_exists( 'SERVER_ADDR', $_SERVER ) ) {
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$lip = isset( $_SERVER['SERVER_ADDR'] ) ? sanitize_text_field( wp_unslash( $_SERVER['SERVER_ADDR'] ) ) : '';
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if ( $ip == $lip ) {
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return esc_html__( 'IP Same as Server: ', 'dam-spam' ) . $ip;
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}
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} elseif ( array_key_exists( 'LOCAL_ADDR', $_SERVER ) ) {
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$lip = isset( $_SERVER['LOCAL_ADDR'] ) ? sanitize_text_field( wp_unslash( $_SERVER['LOCAL_ADDR'] ) ) : '';
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if ( $ip == $lip ) {
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return esc_html__( 'IP Same as Server: ', 'dam-spam' ) . $ip;
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}
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} else {
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try {
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$lip = isset( $_SERVER['SERVER_NAME'] ) ? @gethostbyname( sanitize_text_field( wp_unslash( $_SERVER['SERVER_NAME'] ) ) ) : '';
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if ( $ip == $lip ) {
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return esc_html__( 'IP Same as Server: ', 'dam-spam' ) . $ip;
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}
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} catch ( Exception $e ) {
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}
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}
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$j = strrpos( $ip, '.' );
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if ( $j === false ) {
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return false;
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}
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$k = strrpos( $lip, '.' );
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if ( $k === false ) {
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return false;
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}
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if ( substr( $ip, 0, $j ) == substr( $lip, 0, $k ) ) {
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return esc_html__( 'IP same /24 subnet as server ', 'dam-spam' ) . $ip;
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}
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return false;
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}
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}
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?>
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