#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::net::Ipv4Addr;
fn main() {
    let addr = Ipv4Addr::new(0x12, 0x34, 0x56, 0x78);
    let addr_bits = addr.to_bits() & 0xffffff00;
    assert_eq!(Ipv4Addr::new(0x12, 0x34, 0x56, 0x00), Ipv4Addr::from_bits(addr_bits));
}