lookaround/src/ip.rs

63 lines
1.4 KiB
Rust

use std::{
net::Ipv4Addr,
process::Command,
str::FromStr,
};
use crate::AppError;
pub fn get_ip_addr_output () -> Result <String, AppError> {
let output = Command::new ("ip")
.arg ("addr")
.output ()?;
let output = output.stdout.as_slice ();
let output = String::from_utf8 (output.to_vec ())?;
Ok (output)
}
pub fn parse_ip_addr_output (output: &str) -> Vec <Ipv4Addr> {
// I wrote this in FP style because I was bored.
output.lines ()
.map (|l| l.trim_start ())
.filter_map (|l| l.strip_prefix ("inet "))
.filter_map (|l| l.find ('/').map (|x| &l [0..x]))
.filter_map (|l| Ipv4Addr::from_str (l).ok ())
.collect ()
}
pub fn get_ip_config_output () -> Result <String, AppError> {
let output = Command::new ("ipconfig")
.output ()?;
let output = output.stdout.as_slice ();
let output = String::from_utf8 (output.to_vec ())?;
Ok (output)
}
pub fn parse_ip_config_output (output: &str) -> Vec <Ipv4Addr> {
let mut addrs = vec! [];
for line in output.lines () {
let line = line.trim_start ();
// Maybe only works on English locales?
if ! line.starts_with ("IPv4 Address") {
continue;
}
let colon_pos = match line.find (':') {
None => continue,
Some (x) => x,
};
let line = &line [colon_pos + 2..];
let addr = match Ipv4Addr::from_str (line) {
Err (_) => continue,
Ok (x) => x,
};
addrs.push (addr);
}
addrs
}