add mtu to device trait

Author: lazytiger

Cargo.lock

@@ -41,7 +41,7 @@ ringbuf = "0.3"
 httparse = "1.8"
 async_smoltcp = { path = "async_smoltcp" }
 tokio-rustls = "0.25"
-rustls-pki-types = "1.1"
+rustls-pki-types = "1.2"
 futures = "0.3"
 
 [dev-dependencies]

Cargo.toml

@@ -93,8 +93,9 @@ fn is_private_v4(addr: IpAddress) -> bool {
 }
 
 impl<'a, T: Tun + Clone> TunDevice<'a, T> {
-    pub fn new(mtu: usize, tun: T) -> Self {
+    pub fn new(tun: T) -> Self {
         let channel_buffer = 1024;
+        let mtu = tun.mtu();
         let (tcp_sender, tcp_receiver) = channel(channel_buffer);
         let (udp_sender, udp_receiver) = channel(channel_buffer);
         let mut device = Self {

async_smoltcp/src/device.rs

@@ -25,6 +25,9 @@ pub trait Tun {
 
     /// Allocate a packet which can hold len bytes data.
     fn allocate_packet(&self, len: usize) -> std::io::Result<Self::Packet>;
+
+    /// Get the MTU of the tun device.
+    fn mtu(&self) -> usize;
 }
 
 impl<T> Tun for Arc<T>
@@ -41,6 +44,9 @@ where
     fn allocate_packet(&self, len: usize) -> std::io::Result<Self::Packet> {
         self.deref().allocate_packet(len)
     }
+    fn mtu(&self) -> usize {
+        self.deref().mtu()
+    }
 }
 
 pub trait Packet {

async_smoltcp/src/lib.rs

@@ -40,8 +40,9 @@ serde_json = "1.0"
 serde = "1.0"
 lazy_static = "1.4"
 derive_more = "0.99"
-smoltcp = "0.10"
+smoltcp = "0.11.0"
 rustls = { version = "0.22", features = [] }
+rustls-pki-types = "1.2"
 itertools = "0.12.0"
 bytes = "1.5"
 crossbeam = "0.8"