marirs / ifcfg-rs Goto Github PK

IPv6 link-local addresses are not necessarily globally unique. To use them, you need to also add a "scope ID" when addressing them.

I saw that ifcfg returns SocketAddrs, which contain a scope_id for the V6 variant, but it looks like they're not being populated:

fn main() -> Result<(), Box<dyn Error>> {

    let interfaces = ifcfg::IfCfg::get().expect("ifcfg");

    // for interface in &interfaces {
    //     println!("{:#?}", interface);
    // }

    for interface in &interfaces {
        for address in &interface.addresses {
            if let Some(ref sock_addr) = address.address {
                if let SocketAddr::V6(v6_sock_addr) = sock_addr {
                    println!("scope_id: {} for {}", v6_sock_addr.scope_id(), v6_sock_addr)
                }
                
            }
        }
    }

    Ok(())
}

Results: All of theIPv6 addresses across multiple interfaces have scope_id 0.

I'm just trying to write my first IPv6 networking code, so I don't know how to actually get the scope ID. (Though I was playing around with Deno's new Deno.networkInterfaces() API yesterday and noticed that the do provide that. Maybe there's an example to follow somewhere in their code?)

also: Thanks for writing this library! 😄