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Merge pull request #2 from mbStavola/cidrcheck
Add cidrcheck
authored by
Matt Freitas-Stavola
and committed by
GitHub
ca15b7d9
3c130e51
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cidrcheck
+59
cidrcheck
···
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#!/usr/bin/env -S cargo eval --
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// cargo-deps: argh = "0.1", cidr = "0.2.1"
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use argh::FromArgs;
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use cidr::IpCidr;
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use std::net::IpAddr;
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use std::str::FromStr;
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#[derive(FromArgs)]
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#[argh(description = "Display the ip range for a CIDR and check if an ip falls within.")]
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struct App {
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#[argh(
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option,
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description = "ip that will be checked against the provided CIDR.",
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from_str_fn(parse_ip)
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)]
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ip: Option<IpAddr>,
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#[argh(
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positional,
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description = "CIDR to inspect",
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from_str_fn(parse_cidr)
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)]
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cidr: IpCidr,
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}
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fn main() {
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let App { ip, cidr } = argh::from_env();
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println!(
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"CIDR {} has a range of: {} to {}",
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cidr,
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cidr.first_address(),
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cidr.last_address()
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);
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println!("CIDR {} has a netmask of {}", cidr, cidr.mask());
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if let Some(ip) = ip {
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print!("IP {}", ip);
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let falls_within = cidr.contains(&ip);
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if falls_within {
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print!(" falls ");
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} else {
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print!(" does not fall ");
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}
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println!("within {}", cidr);
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}
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}
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fn parse_ip(value: &str) -> Result<IpAddr, String> {
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IpAddr::from_str(value).map_err(|e| format!("{}", e))
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}
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fn parse_cidr(value: &str) -> Result<IpCidr, String> {
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IpCidr::from_str(value).map_err(|e| format!("{}", e))
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}