使用uWebSockets获取IP地址

Question

请问，如何使用uWebSockets获取发件人IP地址？

const wss = new uws.Server({
  server: server,
  perMessageDeflate: false
});

wss.on(`connection`, ws => {
  ws.remoteAddress = ws.upgradeReq.connection.remoteAddress;
  console.log(`user connected: `, ws.remoteAddress);
});

连接的用户为undefined