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#[cfg(target_os = "linux")]
use crate::linux::interface::Interface;
#[cfg(target_os = "linux")]
use crate::linux::params::Params;
use crate::result::Result;
use async_std::fs::File;
use async_std::fs::OpenOptions;
#[cfg(target_os = "linux")]
use async_std::os::unix::io::{AsRawFd, FromRawFd};
use std::net::Ipv4Addr;
use std::ops::{Deref, DerefMut};
pub struct Tun {
file: File,
iface: Interface,
}
impl Tun {
#[cfg(target_os = "linux")]
async fn alloc(params: Params) -> Result<(File, Interface)> {
let file = OpenOptions::new()
.read(true)
.write(true)
.open("/dev/net/tun")
.await?;
let iface = Interface::new(
file.as_raw_fd(),
params.name.as_deref().unwrap_or_default(),
params.flags,
)?;
if let Some(mtu) = params.mtu {
iface.mtu(Some(mtu))?;
}
if let Some(owner) = params.owner {
iface.owner(owner)?;
}
if let Some(group) = params.group {
iface.group(group)?;
}
if let Some(address) = params.address {
iface.address(Some(address))?;
}
if let Some(netmask) = params.netmask {
iface.netmask(Some(netmask))?;
}
if let Some(destination) = params.destination {
iface.destination(Some(destination))?;
}
if let Some(broadcast) = params.broadcast {
iface.broadcast(Some(broadcast))?;
}
if params.persist {
iface.persist()?;
}
if params.up {
iface.flags(Some(libc::IFF_UP as i16 | libc::IFF_RUNNING as i16))?;
}
Ok((file, iface))
}
#[cfg(not(any(target_os = "linux")))]
async fn alloc(params: Params) -> Result<Self> {
unimplemented!()
}
pub(crate) async fn new(params: Params) -> Result<Self> {
let (file, iface) = Self::alloc(params).await?;
Ok(Self { file, iface })
}
pub fn name(&self) -> &str {
self.iface.name()
}
pub fn mtu(&self) -> Result<i32> {
self.iface.mtu(None)
}
pub fn address(&self) -> Result<Ipv4Addr> {
self.iface.address(None)
}
pub fn destination(&self) -> Result<Ipv4Addr> {
self.iface.destination(None)
}
pub fn broadcast(&self) -> Result<Ipv4Addr> {
self.iface.broadcast(None)
}
pub fn netmask(&self) -> Result<Ipv4Addr> {
self.iface.netmask(None)
}
pub fn flags(&self) -> Result<i16> {
self.iface.flags(None)
}
}
impl Clone for Tun {
#[cfg(target_os = "linux")]
fn clone(&self) -> Self {
Self {
file: unsafe { File::from_raw_fd(self.file.as_raw_fd()) },
iface: self.iface.clone(),
}
}
#[cfg(not(any(target_os = "linux")))]
fn clone(&self) -> Self {
unimplemented!()
}
}
impl Deref for Tun {
type Target = File;
fn deref(&self) -> &Self::Target {
&self.file
}
}
impl DerefMut for Tun {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.file
}
}