Lookup hostname rust

gistfile1.rs

use std::net;

fn main() {
    let ip4 = net::Ipv4Addr::new(8,8,8,8);
    let ip_enum = net::IpAddr(ip4);
    let host = net::lookup_addr(ip_enum);
    let pointer = &host;
    println!("{:?}", pointer);
}


Compiler error:
src/main.rs:5:19: 5:30 error: unresolved name `net::IpAddr`
src/main.rs:5     let ip_enum = net::IpAddr(ip4);