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| \/ | \ \ / / | __ \ (_) | | / ____| | | | |
| \ / |_ __\ V / | |__) | __ ___ ____ _| |_ ___ | (___ | |__ ___| | |
| |\/| | '__|> < | ___/ '__| \ \ / / _` | __/ _ \ \___ \| '_ \ / _ \ | |
| | | | |_ / . \ | | | | | |\ V / (_| | || __/ ____) | | | | __/ | |
|_| |_|_(_)_/ \_\ |_| |_| |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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<?php
/**
* Copyright (с) Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2025 All Rights Reserved
*
* Licensed under CLOUD LINUX LICENSE AGREEMENT
* https://www.cloudlinux.com/legal/
*/
namespace CloudLinux\Imunify\App\Helpers;
/**
* IP Address helper class for extracting client IP addresses.
*
* Provides reliable IP address extraction supporting various proxy headers
* and load balancer configurations.
*
* @since 2.1.0
*/
class IpAddress {
/**
* Get current user IP address with proxy support.
*
* Checks various headers in order of preference to determine the real client IP.
* Supports common proxy headers and load balancer configurations.
*
* @param \CloudLinux\Imunify\App\Defender\Request $request Request object containing server data.
* @return string Current user IP address or '0.0.0.0' if not found.
*/
public static function getClientIp( $request ) {
// Headers to check in order of preference.
$headers = array(
'HTTP_CF_CONNECTING_IP',
'HTTP_CLIENT_IP',
'HTTP_X_FORWARDED_FOR',
'HTTP_X_FORWARDED',
'HTTP_X_CLUSTER_CLIENT_IP',
'HTTP_FORWARDED_FOR',
'HTTP_FORWARDED',
'HTTP_VIA',
'REMOTE_ADDR',
);
foreach ( $headers as $header ) {
$value = null;
if ( 'REMOTE_ADDR' === $header ) {
// Handle REMOTE_ADDR directly from server array.
$server_data = $request->getAllServer();
$value = isset( $server_data['REMOTE_ADDR'] ) ? $server_data['REMOTE_ADDR'] : null;
} else {
// Convert header name to proper format (remove HTTP_ prefix for getHeader method).
$header_name = str_replace( 'HTTP_', '', $header );
$value = $request->getHeader( $header_name );
}
if ( empty( $value ) ) {
continue;
}
// Validate and return the first valid IP found.
$value = trim( $value );
$validated_ip = self::validate_ip( $value );
if ( '0.0.0.0' !== $validated_ip ) {
return $validated_ip;
}
}
// Fallback to '0.0.0.0' if no valid IP found.
return '0.0.0.0';
}
/**
* Validate and sanitize IP address.
*
* @param string $ip The IP address to validate.
*
* @return string Validated IP address or '0.0.0.0' if invalid.
*/
private static function validate_ip( $ip ) {
if ( empty( $ip ) ) {
return '0.0.0.0';
}
// Validate IP address using filter_var.
$validated_ip = filter_var( $ip, FILTER_VALIDATE_IP );
if ( false === $validated_ip ) {
return '0.0.0.0';
}
return $validated_ip;
}
}