fix: add tokio time feature, make SendState/RecvState::new public

- tokio 'time' feature needed for tokio::time::interval in retransmit timer
- SendState::new and RecvState::new must be pub for use from main.rs
- prefix unused tx param with underscore

gatunad/Cargo.toml

@@ -10,7 +10,7 @@ path = "src/main.rs"
 
 [dependencies]
 libc = "0.2"
-tokio = { version = "1", features = ["rt-multi-thread", "macros", "net", "sync", "io-util"] }
+tokio = { version = "1", features = ["rt-multi-thread", "macros", "net", "sync", "io-util", "time"] }
 clap = { version = "4", features = ["derive"] }
 pnet_datalink = "0.35"
 tracing = "0.1"

gatunad/src/session.rs

@@ -33,7 +33,7 @@ pub struct RecvState {
 }
 
 impl SendState {
-    fn new() -> Self {
+    pub fn new() -> Self {
         SendState {
             send_seq: 0,
             acked_seq: 0,
@@ -83,7 +83,7 @@ impl SendState {
 }
 
 impl RecvState {
-    fn new() -> Self {
+    pub fn new() -> Self {
         RecvState {
             expected_seq: 0,
             deliver_seq: 0,
@@ -155,7 +155,7 @@ pub async fn handle_data(
     seq: u32,
     ack_seq: u32,
     payload: &[u8],
-    tx: &TxChan,
+    _tx: &TxChan,
 ) -> Result<bool, WriteError> {
     let handle = {
         let store = store.lock().expect("store lock poisoned");