caisin 0.1.57

caisin tools
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

use std::{net::Ipv4Addr, str::FromStr};


pub fn inet_aton(ip_addr: &str) -> u32 {
    let from_str = Ipv4Addr::from_str(ip_addr).unwrap();
    let octets = from_str.octets();
    (octets[0] as u32) * (1 << 24)
        + (octets[1] as u32) * (1 << 16)
        + (octets[2] as u32) * (1 << 8)
        + (octets[3] as u32)
}
pub fn inet_ntoa(ip_addr: u32) -> String {
    let i_24 = 1 << 24;
    let i_16 = 1 << 16;
    let i_8 = 1 << 8;
    let a = ip_addr / i_24;
    let b = (ip_addr - a * i_24) / i_16;
    let c = (ip_addr - a * i_24 - b * i_16) / i_8;
    let d = ip_addr - a * i_24 - b * i_16 - c * i_8;
    format!("{a}.{b}.{c}.{d}")
}

#[test]
fn test() -> Result<(), String> {
    //inet_aton()和inet_ntoa()
    let inet_aton = inet_aton("255.255.255.255");
    println!("{inet_aton}");
    let inet_aton = inet_ntoa(inet_aton);
    println!("{inet_aton}");
    Ok(())
}