drop IPv6 prefix for IPv4 addrs

src/index.ts

@@ -5,6 +5,7 @@ import { createNodeWebSocket } from '@hono/node-ws';
 import RotRouter from './RotRouter.js';
 import N1mmServer from './N1mmServer.js';
 import WebsocketManager from './WebsocketManager.js';
+import { getConnInfo } from '@hono/node-server/conninfo';
 
 const router = new RotRouter();
 
@@ -37,7 +38,8 @@ app.post('/turn/:label', async (c) => {
 	const body = await c.req.parseBody();
 	const az = Number(body['ROT']);
 	if (isNaN(az)) return c.text('Invalid azimuth', 400);
-	const sourceIp = c.req.header('x-forwarded-for') ?? c.req.header('x-real-ip') ?? 'unknown';
+	const rawIp = c.req.header('x-forwarded-for') ?? getConnInfo(c).remote.address ?? 'unknown';
+	const sourceIp = rawIp.startsWith('::ffff:') ? rawIp.slice(7) : rawIp;
 	const ok = router.turn(label, az, sourceIp);
 	return ok ? c.text(`Turning ${label} to ${az}`) : c.text('Unknown rotator', 404);
 });