include source port in X-Forwarded-For

lib/middleware.js

@@ -9,6 +9,7 @@ module.exports = function(srf, logger) {
     try {
       const gateway = await lookupSipGatewayBySignalingAddress(req.source_address, req.source_port);
       if (!gateway) {
+        // TODO: if uri.host is not a domain, just reject
         req.locals.originator = 'device';
         return authenticator(req, res, next);
       }