Sets up feature. WIP

src/alley/wp/alleyvate/features/class-limit-xmlrpc-access.php

@@ -0,0 +1,49 @@
+<?php
+/**
+ * Class file for Limit_Xmlrpc_access
+ *
+ * (c) Alley <info@alley.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * @package wp-alleyvate
+ */
+
+ namespace Alley\WP\Alleyvate\Features;
+
+use Alley\WP\Types\Feature;
+
+final class Limit_Xmlrpc_Access implements Feature {
+	public function boot(): void {
+		// Init whatever we want to do here.
+
+		// Prior art Copypasta'd from https://github.com/alleyinteractive/national-review/blob/production/mu-plugins/xmlrpc.php.
+		// Probably need to pull this into its own function.
+		if ( empty( $_SERVER['REMOTE_ADDR'] ) ) {
+			return false;
+		}
+
+		$jetpack_ips = get_transient( 'jetpack_ips' );
+
+		if ( false === $jetpack_ips ) {
+			$jetpack_ips = \Mantle\Http_Client\Factory::get( 'https://jetpack.com/ips-v4.json' )->json();
+
+			set_transient(
+				'jetpack_ips',
+				$jetpack_ips,
+				is_array( $jetpack_ips ) ? WEEK_IN_SECONDS : HOUR_IN_SECONDS, // Lower TTL for error in response.
+			);
+		}
+
+		if ( empty( $jetpack_ips ) || ! is_array( $jetpack_ips ) ) {
+			return false;
+		}
+
+		if ( IpUtils::checkIp( $_SERVER['REMOTE_ADDR'], $jetpack_ips ) ) {
+			return true;
+		}
+
+		return isset( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ? IpUtils::checkIp( $_SERVER['HTTP_X_FORWARDED_FOR'], $jetpack_ips ) : false;
+	}
+}

src/alley/wp/alleyvate/load.php

@@ -105,6 +105,10 @@ function load(): void {
 			'disable_block_editor_rest_api_preload_paths',
 			new Features\Disable_Block_Editor_Rest_Api_Preload_Paths(),
 		),
+		new Feature(
+			'limit_xmlrpc_access',
+			new Features\Limit_Xmlrpc_Access(),
+		),
 	);
 
 	$plugin->boot();