Check protocol version during login

examples/combat.rs

@@ -71,6 +71,7 @@ impl Config for Game {
         &self,
         _server: &SharedServer<Self>,
         _remote_addr: SocketAddr,
+        _protocol_version: i32,
     ) -> ServerListPing {
         ServerListPing::Respond {
             online_players: self.player_count.load(Ordering::SeqCst) as i32,

examples/conway.rs

@@ -84,6 +84,7 @@ impl Config for Game {
         &self,
         _server: &SharedServer<Self>,
         _remote_addr: SocketAddr,
+        _protocol_version: i32,
     ) -> ServerListPing {
         ServerListPing::Respond {
             online_players: self.player_count.load(Ordering::SeqCst) as i32,

examples/cow_sphere.rs

@@ -64,6 +64,7 @@ impl Config for Game {
         &self,
         _server: &SharedServer<Self>,
         _remote_addr: SocketAddr,
+        _protocol_version: i32,
     ) -> ServerListPing {
         ServerListPing::Respond {
             online_players: self.player_count.load(Ordering::SeqCst) as i32,

examples/raycast.rs

@@ -59,6 +59,7 @@ impl Config for Game {
         &self,
         _server: &SharedServer<Self>,
         _remote_addr: SocketAddr,
+        _protocol_version: i32,
     ) -> ServerListPing {
         ServerListPing::Respond {
             online_players: self.player_count.load(Ordering::SeqCst) as i32,

examples/terrain.rs

@@ -69,6 +69,7 @@ impl Config for Game {
         &self,
         _server: &SharedServer<Self>,
         _remote_addr: SocketAddr,
+        _protocol_version: i32,
     ) -> ServerListPing {
         ServerListPing::Respond {
             online_players: self.player_count.load(Ordering::SeqCst) as i32,

src/config.rs

@@ -177,6 +177,7 @@ pub trait Config: 'static + Sized + Send + Sync + UnwindSafe + RefUnwindSafe {
         &self,
         shared: &SharedServer<Self>,
         remote_addr: SocketAddr,
+        protocol_version: i32,
     ) -> ServerListPing {
         ServerListPing::Ignore
     }

src/protocol_inner/packets.rs

@@ -391,10 +391,16 @@ pub(crate) mod test {
     use super::*;
 
     def_struct! {
-        TestPacket 0xfff {
+        TestPacket {
             first: String,
             second: Vec<u16>,
             third: u64
         }
     }
+
+    def_packet_group! {
+        TestPacketGroup {
+            TestPacket = 12345,
+        }
+    }
 }

src/server.rs

@@ -547,11 +547,13 @@ async fn handle_connection<C: Config>(
 
     // TODO: peek stream for 0xFE legacy ping
 
-    match c.dec.read_packet::<Handshake>().await?.next_state {
-        HandshakeNextState::Status => handle_status(server, &mut c, remote_addr)
+    let handshake = c.dec.read_packet::<Handshake>().await?;
+
+    match handshake.next_state {
+        HandshakeNextState::Status => handle_status(server, &mut c, remote_addr, handshake)
             .await
             .context("error during status"),
-        HandshakeNextState::Login => match handle_login(&server, &mut c, remote_addr)
+        HandshakeNextState::Login => match handle_login(&server, &mut c, remote_addr, handshake)
             .await
             .context("error during login")?
         {
@@ -567,10 +569,16 @@ async fn handle_status<C: Config>(
     server: SharedServer<C>,
     c: &mut Codec,
     remote_addr: SocketAddr,
+    handshake: Handshake,
 ) -> anyhow::Result<()> {
     c.dec.read_packet::<QueryRequest>().await?;
 
-    match server.0.cfg.server_list_ping(&server, remote_addr).await {
+    match server
+        .0
+        .cfg
+        .server_list_ping(&server, remote_addr, handshake.protocol_version.0)
+        .await
+    {
         ServerListPing::Respond {
             online_players,
             max_players,
@@ -619,7 +627,13 @@ async fn handle_login<C: Config>(
     server: &SharedServer<C>,
     c: &mut Codec,
     remote_addr: SocketAddr,
+    handshake: Handshake,
 ) -> anyhow::Result<Option<NewClientData>> {
+    if handshake.protocol_version.0 != PROTOCOL_VERSION {
+        // TODO: send translated disconnect msg?
+        return Ok(None);
+    }
+
     let LoginStart {
         username: BoundedString(username),
         sig_data: _, // TODO