# 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 Some(54.177.127.37:42538) cost 402.208664ms
```
## 关于
本项目隶属于**人民网络([rmw.link](//rmw.link))** 代码计划。
