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// Copyright (c) 2018 Paweł Zmarzły
// 
// This software is released under the MIT License.
// https://opensource.org/licenses/MIT

use get_if_addrs::{ get_if_addrs, IfAddr };

use std::io;
use std::net::Ipv4Addr;

#[derive(Debug)]
pub struct Interface {
    pub name: String,
    pub addr: Ipv4Addr
}

pub fn get_network_interfaces() -> Result<Vec<Interface>, io::Error> {
    get_if_addrs().map(|interfaces|
        interfaces.into_iter().filter_map(|interface|
            if let IfAddr::V4(ref addr) = interface.addr {
                if addr.is_loopback() { return None }
                Some(Interface { name: interface.name, addr: addr.ip })
            } else {
                None
            }
        ).collect()
    )
}