# rmw-stun get external ip port via stun server ## use example ``` use async_std::net::UdpSocket; use rmw_stun::external_addr; use std::net::{IpAddr, Ipv4Addr, SocketAddr}; use std::time::{Instant}; #[async_std::main] async fn main() { let udp = UdpSocket::bind(SocketAddr::new(IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)), 0)) .await .unwrap(); //let server = "not.exist.stun:3478"; let server = "stun.cablenet-as.net:3478"; let timeout = 3; let start = Instant::now(); let addr = external_addr(&udp, server, timeout).await; let duration = start.elapsed(); println!("external addr {:?} cost {:?}", addr, duration); } ``` output as below ``` external addr Ok(54.177.127.37:40143) cost 402.976326ms ``` ## 关于 本项目隶属于**人民网络([rmw.link](//rmw.link))** 代码计划。