player info packet

azalea-client/src/connect.rs

@@ -127,6 +127,9 @@ pub async fn join_server(address: &ServerAddress) -> Result<(), String> {
                     // TODO: reply with teleport confirm
                     println!("Got player position packet {:?}", p);
                 }
+                GamePacket::ClientboundPlayerInfoPacket(p) => {
+                    println!("Got player info packet {:?}", p);
+                }
             },
             Err(e) => {
                 panic!("Error: {:?}", e);

azalea-protocol/README.md

@@ -1,3 +1,7 @@
 # Azalea Protocol
 
 Sent and receive Minecraft packets. You should probably use `azalea` or `azalea-client` instead.
+
+The goal is to **only** support the latest Minecraft version in order to ease development.
+
+This is not yet complete, search for `TODO` in the code for things that need to be done.

azalea-protocol/src/mc_buf/read.rs

@@ -1,11 +1,12 @@
 use async_trait::async_trait;
 use azalea_chat::component::Component;
 use azalea_core::{
-    difficulty::Difficulty, game_type::GameType, resource_location::ResourceLocation, Slot,
-    SlotData,
+    difficulty::Difficulty, game_type::GameType, resource_location::ResourceLocation,
+    serializable_uuid::SerializableUuid, Slot, SlotData,
 };
 use serde::Deserialize;
 use tokio::io::{AsyncRead, AsyncReadExt};
+use uuid::Uuid;
 
 use super::{UnsizedByteArray, MAX_STRING_LENGTH};
 
@@ -29,6 +30,7 @@ pub trait Readable {
     async fn read_short(&mut self) -> Result<i16, String>;
     async fn read_float(&mut self) -> Result<f32, String>;
     async fn read_double(&mut self) -> Result<f64, String>;
+    async fn read_uuid(&mut self) -> Result<Uuid, String>;
 }
 
 #[async_trait]
@@ -207,6 +209,15 @@ where
             Err(_) => Err("Error reading double".to_string()),
         }
     }
+
+    async fn read_uuid(&mut self) -> Result<Uuid, String> {
+        Ok(Uuid::from_int_array([
+            self.read_int().await? as u32,
+            self.read_int().await? as u32,
+            self.read_int().await? as u32,
+            self.read_int().await? as u32,
+        ]))
+    }
 }
 
 #[async_trait]
@@ -439,6 +450,37 @@ impl McBufReadable for Option<GameType> {
     }
 }
 
+// Option<String>
+#[async_trait]
+impl McBufReadable for Option<String> {
+    async fn read_into<R>(buf: &mut R) -> Result<Self, String>
+    where
+        R: AsyncRead + std::marker::Unpin + std::marker::Send,
+    {
+        let present = buf.read_boolean().await?;
+        Ok(if present {
+            Some(buf.read_utf().await?)
+        } else {
+            None
+        })
+    }
+}
+// Option<Component>
+#[async_trait]
+impl McBufReadable for Option<Component> {
+    async fn read_into<R>(buf: &mut R) -> Result<Self, String>
+    where
+        R: AsyncRead + std::marker::Unpin + std::marker::Send,
+    {
+        let present = buf.read_boolean().await?;
+        Ok(if present {
+            Some(Component::read_into(buf).await?)
+        } else {
+            None
+        })
+    }
+}
+
 // azalea_nbt::Tag
 #[async_trait]
 impl McBufReadable for azalea_nbt::Tag {
@@ -493,3 +535,14 @@ impl McBufReadable for Slot {
         Ok(Slot::Present(SlotData { id, count, nbt }))
     }
 }
+
+// Uuid
+#[async_trait]
+impl McBufReadable for Uuid {
+    async fn read_into<R>(buf: &mut R) -> Result<Self, String>
+    where
+        R: AsyncRead + std::marker::Unpin + std::marker::Send,
+    {
+        buf.read_uuid().await
+    }
+}

azalea-protocol/src/mc_buf/write.rs

@@ -2,10 +2,12 @@ use super::{UnsizedByteArray, MAX_STRING_LENGTH};
 use async_trait::async_trait;
 use azalea_chat::component::Component;
 use azalea_core::{
-    difficulty::Difficulty, game_type::GameType, resource_location::ResourceLocation, Slot,
+    difficulty::Difficulty, game_type::GameType, resource_location::ResourceLocation,
+    serializable_uuid::SerializableUuid, Slot,
 };
 use byteorder::{BigEndian, WriteBytesExt};
 use std::io::Write;
+use uuid::Uuid;
 
 #[async_trait]
 pub trait Writable {
@@ -43,6 +45,7 @@ pub trait Writable {
     ) -> Result<(), std::io::Error>;
     fn write_float(&mut self, n: f32) -> Result<(), std::io::Error>;
     fn write_double(&mut self, n: f64) -> Result<(), std::io::Error>;
+    fn write_uuid(&mut self, uuid: &Uuid) -> Result<(), std::io::Error>;
 }
 
 #[async_trait]
@@ -163,6 +166,15 @@ impl Writable for Vec<u8> {
     ) -> Result<(), std::io::Error> {
         self.write_utf(&location.to_string())
     }
+
+    fn write_uuid(&mut self, uuid: &Uuid) -> Result<(), std::io::Error> {
+        let [a, b, c, d] = uuid.to_int_array();
+        a.write_into(self)?;
+        b.write_into(self)?;
+        c.write_into(self)?;
+        d.write_into(self)?;
+        Ok(())
+    }
 }
 
 pub trait McBufWritable
@@ -317,6 +329,32 @@ impl McBufWritable for Option<GameType> {
     }
 }
 
+// Option<String>
+impl McBufWritable for Option<String> {
+    fn write_into(&self, buf: &mut Vec<u8>) -> Result<(), std::io::Error> {
+        if let Some(s) = self {
+            buf.write_boolean(true)?;
+            buf.write_utf(s)?;
+        } else {
+            buf.write_boolean(false)?;
+        };
+        Ok(())
+    }
+}
+
+// Option<Component>
+impl McBufWritable for Option<Component> {
+    fn write_into(&self, buf: &mut Vec<u8>) -> Result<(), std::io::Error> {
+        if let Some(s) = self {
+            buf.write_boolean(true)?;
+            s.write_into(buf)?;
+        } else {
+            buf.write_boolean(false)?;
+        };
+        Ok(())
+    }
+}
+
 // azalea_nbt::Tag
 impl McBufWritable for azalea_nbt::Tag {
     fn write_into(&self, buf: &mut Vec<u8>) -> Result<(), std::io::Error> {
@@ -365,3 +403,12 @@ impl McBufWritable for Slot {
         Ok(())
     }
 }
+
+// Slot
+impl McBufWritable for Uuid {
+    fn write_into(&self, buf: &mut Vec<u8>) -> Result<(), std::io::Error> {
+        buf.write_uuid(self)?;
+
+        Ok(())
+    }
+}

azalea-protocol/src/packets/game/clientbound_declare_commands_packet.rs

@@ -1,5 +1,5 @@
 use super::GamePacket;
-use crate::mc_buf::{McBufReadable, McBufWritable, Readable};
+use crate::mc_buf::{McBufReadable, McBufWritable, Readable, Writable};
 use async_trait::async_trait;
 use azalea_core::resource_location::ResourceLocation;
 use std::hash::Hash;
@@ -115,7 +115,7 @@ impl McBufReadable for BrigadierString {
 }
 impl McBufWritable for BrigadierString {
     fn write_into(&self, buf: &mut Vec<u8>) -> Result<(), std::io::Error> {
-        buf.write_i8(*self as i8);
+        buf.write_byte(*self as u8)?;
         Ok(())
     }
 }

azalea-protocol/src/packets/game/clientbound_entity_event_packet.rs

@@ -1,4 +1,3 @@
-use azalea_core::{game_type::GameType, resource_location::ResourceLocation};
 use packet_macros::GamePacket;
 
 // we can't identify the status in azalea-protocol since they vary depending on the entity

azalea-protocol/src/packets/game/clientbound_player_info_packet.rs

@@ -0,0 +1,101 @@
+// i don't know the actual name of this packet, i couldn't find it in the source code
+
+use crate::mc_buf::{McBufReadable, McBufWritable, Readable, Writable};
+use async_trait::async_trait;
+use azalea_chat::component::Component;
+use packet_macros::{GamePacket, McBufReadable, McBufWritable};
+use tokio::io::AsyncRead;
+use uuid::Uuid;
+
+#[derive(Clone, Debug, GamePacket)]
+pub struct ClientboundPlayerInfoPacket {
+    pub action: Action,
+}
+
+#[derive(Clone, Debug)]
+pub enum Action {
+    AddPlayer(Vec<AddPlayer>),
+    UpdateGameMode(Vec<UpdateGameMode>),
+    UpdateLatency(Vec<UpdateLatency>),
+    UpdateDisplayName(Vec<UpdateDisplayName>),
+    RemovePlayer(Vec<RemovePlayer>),
+}
+
+#[derive(Clone, Debug, McBufReadable, McBufWritable)]
+pub struct PlayerProperty {
+    name: String,
+    value: String,
+    signature: Option<String>,
+}
+
+#[derive(Clone, Debug, McBufReadable, McBufWritable)]
+pub struct AddPlayer {
+    uuid: Uuid,
+    properties: Vec<PlayerProperty>,
+    #[varint]
+    gamemode: u32,
+    #[varint]
+    ping: i32,
+    display_name: Option<Component>,
+}
+
+#[derive(Clone, Debug, McBufReadable, McBufWritable)]
+pub struct UpdateGameMode {
+    uuid: Uuid,
+    #[varint]
+    gamemode: u32,
+}
+
+#[derive(Clone, Debug, McBufReadable, McBufWritable)]
+pub struct UpdateLatency {
+    uuid: Uuid,
+    #[varint]
+    ping: i32,
+}
+
+#[derive(Clone, Debug, McBufReadable, McBufWritable)]
+pub struct UpdateDisplayName {
+    uuid: Uuid,
+    display_name: Option<Component>,
+}
+#[derive(Clone, Debug, McBufReadable, McBufWritable)]
+pub struct RemovePlayer {
+    uuid: Uuid,
+}
+
+#[async_trait]
+impl McBufReadable for Action {
+    async fn read_into<R>(buf: &mut R) -> Result<Self, String>
+    where
+        R: AsyncRead + std::marker::Unpin + std::marker::Send,
+    {
+        let id = buf.read_byte().await?;
+        Ok(match id {
+            0 => Action::AddPlayer(Vec::<AddPlayer>::read_into(buf).await?),
+            1 => Action::UpdateGameMode(Vec::<UpdateGameMode>::read_into(buf).await?),
+            2 => Action::UpdateLatency(Vec::<UpdateLatency>::read_into(buf).await?),
+            3 => Action::UpdateDisplayName(Vec::<UpdateDisplayName>::read_into(buf).await?),
+            4 => Action::RemovePlayer(Vec::<RemovePlayer>::read_into(buf).await?),
+            _ => panic!("Unknown player info action id: {}", id),
+        })
+    }
+}
+impl McBufWritable for Action {
+    fn write_into(&self, buf: &mut Vec<u8>) -> Result<(), std::io::Error> {
+        buf.write_byte(match self {
+            Action::AddPlayer(_) => 0,
+            Action::UpdateGameMode(_) => 1,
+            Action::UpdateLatency(_) => 2,
+            Action::UpdateDisplayName(_) => 3,
+            Action::RemovePlayer(_) => 4,
+        })?;
+        match self {
+            Action::AddPlayer(players) => players.write_into(buf)?,
+            Action::UpdateGameMode(players) => players.write_into(buf)?,
+            Action::UpdateLatency(players) => players.write_into(buf)?,
+            Action::UpdateDisplayName(players) => players.write_into(buf)?,
+            Action::RemovePlayer(players) => players.write_into(buf)?,
+        }
+        Ok(())
+    }
+}

azalea-protocol/src/packets/game/mod.rs

@@ -5,6 +5,7 @@ pub mod clientbound_disconnect_packet;
 pub mod clientbound_entity_event_packet;
 pub mod clientbound_login_packet;
 pub mod clientbound_player_abilities_packet;
+pub mod clientbound_player_info_packet;
 pub mod clientbound_player_position_packet;
 pub mod clientbound_recipe_packet;
 pub mod clientbound_set_carried_item_packet;
@@ -25,6 +26,7 @@ declare_state_packets!(
         0x18: clientbound_custom_payload_packet::ClientboundCustomPayloadPacket,
         0x26: clientbound_login_packet::ClientboundLoginPacket,
         0x32: clientbound_player_abilities_packet::ClientboundPlayerAbilitiesPacket,
+        0x36: clientbound_player_info_packet::ClientboundPlayerInfoPacket,
         0x38: clientbound_player_position_packet::ClientboundPlayerPositionPacket,
         0x39: clientbound_recipe_packet::ClientboundRecipePacket,
         0x48: clientbound_set_carried_item_packet::ClientboundSetCarriedItemPacket,

azalea-protocol/src/packets/login/clientbound_game_profile_packet.rs

@@ -9,6 +9,7 @@ pub struct ClientboundGameProfilePacket {
     pub game_profile: GameProfile,
 }
 
+// TODO: add derives to GameProfile and have an impl McBufReadable/Writable for GameProfile
 impl ClientboundGameProfilePacket {
     pub fn get(self) -> LoginPacket {
         LoginPacket::ClientboundGameProfilePacket(self)
@@ -25,6 +26,7 @@ impl ClientboundGameProfilePacket {
     pub async fn read<T: tokio::io::AsyncRead + std::marker::Unpin + std::marker::Send>(
         buf: &mut T,
     ) -> Result<LoginPacket, String> {
+        // TODO: we have a thing to read from the uuid now
         let uuid = Uuid::from_int_array([
             buf.read_int().await? as u32,
             buf.read_int().await? as u32,