ProxyLookup.php

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<?php
 
use Wikimedia\IPSet;
 
class ProxyLookup {
 
    private $proxyServers;
 
    private $proxyServersComplex;
 
    private $proxyIPSet;
 
    public function __construct( $proxyServers, $proxyServersComplex ) {
        $this->proxyServers = $proxyServers;
        $this->proxyServersComplex = $proxyServersComplex;
    }
 
    public function isConfiguredProxy( $ip ) {
        // Quick check of known singular proxy servers
        if ( in_array( $ip, $this->proxyServers, true ) ) {
            return true;
        }
 
        // Check against addresses and CIDR nets in the complex list
        if ( !$this->proxyIPSet ) {
            $this->proxyIPSet = new IPSet( $this->proxyServersComplex );
        }
        return $this->proxyIPSet->match( $ip );
    }
 
    public function isTrustedProxy( $ip ) {
        $trusted = $this->isConfiguredProxy( $ip );
        Hooks::run( 'IsTrustedProxy', [ &$ip, &$trusted ] );
        return $trusted;
    }
}