Get a Random Unused TCP/IP or UDP Port

[xcthulhu]

No description provided.

[AndyGauge]

I'll give it a stab. Do you think std::net::TcpListener would suffice or should this be Tokio?

[dtolnay]

I would stick with the standard library if possible. Though I have no idea how to implement this 😅 my first step would be rummaging through docs.

[fox0]

let socket = UdpSocket::bind("127.0.0.1:0").unwrap();

[xenowits]

use std::net::TcpListener;

let listener = TcpListener::bind("127.0.0.1:0").unwrap();

Binding with a port number of 0 will request that the OS assigns a port to this listener. The port allocated can be queried via the TcpListener::local_addr method.