add ablility to set device GUID for wintun

examples/ping-tun.rs

@@ -33,7 +33,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
 
  #[cfg(target_os = "windows")]
  config.platform(|config| {
- config.initialize();
+ config.initialize(Some(9099482345783245345345_u128));
  });
 
  let dev = tun::create_as_async(&config)?;

src/platform/windows/device.rs

@@ -30,10 +30,9 @@ pub struct Device {
 
 impl Device {
  /// Create a new `Device` for the given `Configuration`.
- pub fn new(config: &Configuration) -> Result<Self> {
+ pub fn new(config: &Configuration, guid: Option<u128>) -> Result<Self> {
  let wintun = unsafe { wintun::load()? };
  let tun_name = config.name.as_deref().unwrap_or("wintun");
- let guid = Some(9099482345783245345345_u128);
  let adapter = match wintun::Adapter::open(&wintun, tun_name) {
  Ok(a) => a,
  Err(_) => wintun::Adapter::create(&wintun, tun_name, tun_name, guid)?,

src/platform/windows/mod.rs

@@ -21,17 +21,26 @@ pub use device::{Device, Queue};
 use crate::configuration::Configuration as C;
 use crate::error::*;
 
+static DEVICE_GUID: std::sync::OnceLock<Option<u128>> = std::sync::OnceLock::new();
+
 /// Windows-only interface configuration.
 #[derive(Copy, Clone, Default, Debug)]
 pub struct Configuration {}
 
 impl Configuration {
- pub fn initialize(&mut self) {
+ pub fn initialize(&mut self, device_guid: Option<u128>) {
  log::trace!("Windows configuration initialize");
+ if let Err(err) = DEVICE_GUID.set(device_guid) {
+ log::error!("set device GUID error \"{:?}\"", err);
+ }
  }
 }
 
 /// Create a TUN device with the given name.
 pub fn create(configuration: &C) -> Result<Device> {
- Device::new(configuration)
+ let guid = match DEVICE_GUID.get() {
+ Some(g) => *g,
+ None => None,
+ };
+ Device::new(configuration, guid)
 }