A crate to return the maximum transmission unit (MTU) of the local network interface towards a given destination SocketAddr.

This crate exports a single function

pub fn interface_mtu(remote: &SocketAddr) -> Result<usize, Error>

that returns the MTU of the local network interface towards the remote destination, or an Error when the MTU could not be determined. It supports both IPv4 and IPv6.

• Linux
• macOS
• Windows

The returned MTU may exceed the maximum IP packet size of 65,535 bytes on some platforms for some remote destinations. (For example, loopback destinations on Windows.)

We're happy to receive PRs that improve this crate. Please take a look at our community guidelines beforehand.