aboutsummaryrefslogtreecommitdiffstats
path: root/src/platform/linux/mod.rs
diff options
context:
space:
mode:
Diffstat (limited to 'src/platform/linux/mod.rs')
-rw-r--r--src/platform/linux/mod.rs181
1 files changed, 3 insertions, 178 deletions
diff --git a/src/platform/linux/mod.rs b/src/platform/linux/mod.rs
index ad2b8be..7a456ad 100644
--- a/src/platform/linux/mod.rs
+++ b/src/platform/linux/mod.rs
@@ -1,179 +1,4 @@
-use super::Tun;
-use super::TunBind;
+mod tun;
+mod udp;
-use super::super::wireguard::tun::*;
-
-use libc::*;
-
-use std::os::raw::c_short;
-use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
-
-const IFNAMSIZ: usize = 16;
-const TUNSETIFF: u64 = 0x4004_54ca;
-
-const IFF_UP: i16 = 0x1;
-const IFF_RUNNING: i16 = 0x40;
-
-const IFF_TUN: c_short = 0x0001;
-const IFF_NO_PI: c_short = 0x1000;
-
-use std::error::Error;
-use std::fmt;
-use std::sync::atomic::AtomicUsize;
-use std::sync::Arc;
-
-const CLONE_DEVICE_PATH: &'static [u8] = b"/dev/net/tun\0";
-
-const TUN_MAGIC: u8 = b'T';
-const TUN_SET_IFF: u8 = 202;
-
-#[repr(C)]
-struct Ifreq {
- name: [u8; libc::IFNAMSIZ],
- flags: c_short,
- _pad: [u8; 64],
-}
-
-pub struct PlatformTun {}
-
-pub struct PlatformTunReader {
- fd: RawFd,
-}
-
-pub struct PlatformTunWriter {
- fd: RawFd,
-}
-
-/* Listens for netlink messages
- * announcing an MTU update for the interface
- */
-#[derive(Clone)]
-pub struct PlatformTunMTU {
- value: Arc<AtomicUsize>,
-}
-
-#[derive(Debug)]
-pub enum LinuxTunError {
- InvalidTunDeviceName,
- FailedToOpenCloneDevice,
- SetIFFIoctlFailed,
- Closed, // TODO
-}
-
-impl fmt::Display for LinuxTunError {
- fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
- unimplemented!()
- }
-}
-
-impl Error for LinuxTunError {
- fn description(&self) -> &str {
- unimplemented!()
- }
-
- fn source(&self) -> Option<&(dyn Error + 'static)> {
- unimplemented!()
- }
-}
-
-impl MTU for PlatformTunMTU {
- fn mtu(&self) -> usize {
- 1500
- }
-}
-
-impl Reader for PlatformTunReader {
- type Error = LinuxTunError;
-
- fn read(&self, buf: &mut [u8], offset: usize) -> Result<usize, Self::Error> {
- debug_assert!(
- offset < buf.len(),
- "There is no space for the body of the TUN read"
- );
- let n = unsafe { read(self.fd, buf[offset..].as_mut_ptr() as _, buf.len() - offset) };
- if n < 0 {
- Err(LinuxTunError::Closed)
- } else {
- // conversion is safe
- Ok(n as usize)
- }
- }
-}
-
-impl Writer for PlatformTunWriter {
- type Error = LinuxTunError;
-
- fn write(&self, src: &[u8]) -> Result<(), Self::Error> {
- match unsafe { write(self.fd, src.as_ptr() as _, src.len() as _) } {
- -1 => Err(LinuxTunError::Closed),
- _ => Ok(()),
- }
- }
-}
-
-impl Tun for PlatformTun {
- type Error = LinuxTunError;
- type Reader = PlatformTunReader;
- type Writer = PlatformTunWriter;
- type MTU = PlatformTunMTU;
-}
-
-impl TunBind for PlatformTun {
- fn create(name: &str) -> Result<(Vec<Self::Reader>, Self::Writer, Self::MTU), Self::Error> {
- // construct request struct
- let mut req = Ifreq {
- name: [0u8; libc::IFNAMSIZ],
- flags: (libc::IFF_TUN | libc::IFF_NO_PI) as c_short,
- _pad: [0u8; 64],
- };
-
- // sanity check length of device name
- let bs = name.as_bytes();
- if bs.len() > libc::IFNAMSIZ - 1 {
- return Err(LinuxTunError::InvalidTunDeviceName);
- }
- req.name[..bs.len()].copy_from_slice(bs);
-
- // open clone device
- let fd = match unsafe { open(CLONE_DEVICE_PATH.as_ptr() as _, O_RDWR) } {
- -1 => return Err(LinuxTunError::FailedToOpenCloneDevice),
- fd => fd,
- };
-
- // create TUN device
- if unsafe { ioctl(fd, TUNSETIFF as _, &req) } < 0 {
- return Err(LinuxTunError::SetIFFIoctlFailed);
- }
-
- // create PlatformTunMTU instance
-
- Ok((
- vec![PlatformTunReader { fd }],
- PlatformTunWriter { fd },
- PlatformTunMTU {
- value: Arc::new(AtomicUsize::new(1500)),
- },
- ))
- }
-}
-
-#[cfg(test)]
-mod tests {
- use super::*;
- use std::env;
-
- fn is_root() -> bool {
- match env::var("USER") {
- Ok(val) => val == "root",
- Err(e) => false,
- }
- }
-
- #[test]
- fn test_tun_create() {
- if !is_root() {
- return;
- }
- let (readers, writers, mtu) = PlatformTun::create("test").unwrap();
- }
-}
+pub use tun::PlatformTun;