Update client.rs

[dev4u]

Fix the issue that the connection creation fails when the network changes

[zonyitoo]

This will create a new UdpSocket for every accepted connections. Why do you think that it is the root cause?

[dev4u]

因为手机的网络环境发生变化的时候，之前建立的nat映射失效了。不rebind的话发不了数据。 当然，我也承认提交的代码比较粗糙，或许可以先检测网络环境是否有发生变化，再决定要不要rebind，这比较合乎该有的效果。

[madeye]

You should only do this when the connect() failed: https://github.com/shadowsocks/qtun/blob/master/src/client.rs#L116

[dev4u]

@zonyitoo 你替我看看这样修改还有没有问题？

[dev4u]

You should only do this when the connect() failed: https://github.com/shadowsocks/qtun/blob/master/src/client.rs#L116

已经按照你的建议做了修改。

[madeye]

Can you confirm your fix works now?

[dev4u]

Can you confirm your fix works now?

是的，这两天一直在我的手机移动网络下运行着。

[madeye]

https://github.com/shadowsocks/qtun/runs/5578803045?check_suite_focus=true