Some adaption and alligned to the source code from dndx

fake-tcp/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "fake-tcp"
-version = "0.5.0"
+version = "0.5.5"
 edition = "2021"
 authors = ["Datong Sun <dndx@idndx.com>"]
 license = "MIT OR Apache-2.0"
@@ -16,10 +16,10 @@ benchmark = []
 
 [dependencies]
 bytes = "1.4.0"
-pnet = "0.33.0"
+pnet = "0.34.0"
 tokio = { version = "1.28.0", features = ["full"] }
 rand = { version = "0.8.5", features = ["small_rng"] }
 log = "0.4.17"
 internet-checksum = "0.2.1"
-tokio-tun = "0.7"
-flume = "0.10.14"
+tokio-tun = "0.9.1"
+flume ="0.11.0"

fake-tcp/src/lib.rs

@@ -146,7 +146,7 @@ impl Socket {
         )
     }
 
-    fn build_tcp_packet(&self, flags: u16, payload: Option<&[u8]>) -> Bytes {
+    fn build_tcp_packet(&self, flags: u8, payload: Option<&[u8]>) -> Bytes {
         let ack = self.ack.load(Ordering::Relaxed);
         self.last_ack.store(ack, Ordering::Relaxed);
 

fake-tcp/src/packet.rs

@@ -36,7 +36,7 @@ pub fn build_tcp_packet(
     remote_addr: SocketAddr,
     seq: u32,
     ack: u32,
-    flags: u16,
+    flags: u8,
     payload: Option<&[u8]>,
 ) -> Bytes {
     let ip_header_len = match local_addr {