Package net.minecraft.server.network

Class ServerLoginNetworkHandler

java.lang.Object

net.minecraft.server.network.ServerLoginNetworkHandler

All Implemented Interfaces:

PacketListener, ServerLoginPacketListener

public class ServerLoginNetworkHandler
extends Object
implements ServerLoginPacketListener

The server login network handler.

It listens to packets on the netty event loop and is ticked on the server thread simultaneously.

Implementation Requirements:

The vanilla implementation is created by a handshake network handler. It first receives a hello packet from the client. If it is in online mode, it goes through an additional authentication process. Then it optionally sends a network compression packet. Finally, when it can accept the player (no player UUID conflicts), it will accept the player by sending a login success packet and then transitions the connection's packet listener to a ServerPlayNetworkHandler.

Mappings:

Namespace	Name
official	adw
intermediary	net/minecraft/class_3248
named	net/minecraft/server/network/ServerLoginNetworkHandler

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static enum	ServerLoginNetworkHandler.State

Field Summary

Fields

Modifier and Type	Field	Description
final ClientConnection	connection
private @Nullable ServerPlayerEntity	delayedPlayer	The delayed player, waiting to join the server once the existing player with the same UUID is gone.
(package private) static final Logger	LOGGER
private int	loginTicks
private static final AtomicInteger	NEXT_AUTHENTICATOR_THREAD_ID
private final byte[]	nonce
(package private) @Nullable com.mojang.authlib.GameProfile	profile
private static final Random	RANDOM
(package private) final MinecraftServer	server
private final String	serverId
(package private) ServerLoginNetworkHandler.State	state
private static final int	TIMEOUT_TICKS

Constructor Summary

Constructors

Constructor	Description
ServerLoginNetworkHandler(MinecraftServer server, ClientConnection connection)

Method Summary

Modifier and Type	Method	Description
void	acceptPlayer()	Creates the player to be added to the server and adds it to the server.
private void	addToServer(ServerPlayerEntity player)
void	disconnect(Text reason)
ClientConnection	getConnection()	Returns the connection this packet listener intends to listen to.
String	getConnectionInfo()
void	onDisconnected(Text reason)	Called when the connection this listener listens to has disconnected.
void	onHello(LoginHelloC2SPacket packet)
void	onKey(LoginKeyC2SPacket packet)
void	onQueryResponse(LoginQueryResponseC2SPacket packet)
void	tick()	Ticks this login network handler.
protected com.mojang.authlib.GameProfile	toOfflineProfile(com.mojang.authlib.GameProfile profile)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

NEXT_AUTHENTICATOR_THREAD_ID

private static final AtomicInteger NEXT_AUTHENTICATOR_THREAD_ID

Mappings:

Namespace	Name	Mixin selector
official	b	Ladw;b:Ljava/util/concurrent/atomic/AtomicInteger;
intermediary	field_14157	Lnet/minecraft/class_3248;field_14157:Ljava/util/concurrent/atomic/AtomicInteger;
named	NEXT_AUTHENTICATOR_THREAD_ID	Lnet/minecraft/server/network/ServerLoginNetworkHandler;NEXT_AUTHENTICATOR_THREAD_ID:Ljava/util/concurrent/atomic/AtomicInteger;

LOGGER

static final Logger LOGGER

Mappings:

Namespace	Name	Mixin selector
official	c	Ladw;c:Lorg/apache/logging/log4j/Logger;
intermediary	field_14166	Lnet/minecraft/class_3248;field_14166:Lorg/apache/logging/log4j/Logger;
named	LOGGER	Lnet/minecraft/server/network/ServerLoginNetworkHandler;LOGGER:Lorg/apache/logging/log4j/Logger;

TIMEOUT_TICKS

private static final int TIMEOUT_TICKS

See Also:

• Constant Field Values

Mappings:

Namespace	Name	Mixin selector
official	d	Ladw;d:I
intermediary	field_29779	Lnet/minecraft/class_3248;field_29779:I
named	TIMEOUT_TICKS	Lnet/minecraft/server/network/ServerLoginNetworkHandler;TIMEOUT_TICKS:I

RANDOM

private static final Random RANDOM

Mappings:

Namespace	Name	Mixin selector
official	e	Ladw;e:Ljava/util/Random;
intermediary	field_14164	Lnet/minecraft/class_3248;field_14164:Ljava/util/Random;
named	RANDOM	Lnet/minecraft/server/network/ServerLoginNetworkHandler;RANDOM:Ljava/util/Random;

nonce

private final byte[] nonce

Mappings:

Namespace	Name	Mixin selector
official	f	Ladw;f:[B
intermediary	field_14167	Lnet/minecraft/class_3248;field_14167:[B
named	nonce	Lnet/minecraft/server/network/ServerLoginNetworkHandler;nonce:[B

server

final MinecraftServer server

Mappings:

Namespace	Name	Mixin selector
official	g	Ladw;g:Lnet/minecraft/server/MinecraftServer;
intermediary	field_14162	Lnet/minecraft/class_3248;field_14162:Lnet/minecraft/server/MinecraftServer;
named	server	Lnet/minecraft/server/network/ServerLoginNetworkHandler;server:Lnet/minecraft/server/MinecraftServer;

connection

public final ClientConnection connection

Mappings:

Namespace	Name	Mixin selector
official	a	Ladw;a:Lpf;
intermediary	field_14158	Lnet/minecraft/class_3248;field_14158:Lnet/minecraft/class_2535;
named	connection	Lnet/minecraft/server/network/ServerLoginNetworkHandler;connection:Lnet/minecraft/network/ClientConnection;

state

ServerLoginNetworkHandler.State state

Mappings:

Namespace	Name	Mixin selector
official	h	Ladw;h:Ladw$a;
intermediary	field_14163	Lnet/minecraft/class_3248;field_14163:Lnet/minecraft/class_3248$class_3249;
named	state	Lnet/minecraft/server/network/ServerLoginNetworkHandler;state:Lnet/minecraft/server/network/ServerLoginNetworkHandler$State;

loginTicks

private int loginTicks

Mappings:

Namespace	Name	Mixin selector
official	i	Ladw;i:I
intermediary	field_14156	Lnet/minecraft/class_3248;field_14156:I
named	loginTicks	Lnet/minecraft/server/network/ServerLoginNetworkHandler;loginTicks:I

profile

@Nullable
@Nullable com.mojang.authlib.GameProfile profile

Mappings:

Namespace	Name	Mixin selector
official	j	Ladw;j:Lcom/mojang/authlib/GameProfile;
intermediary	field_14160	Lnet/minecraft/class_3248;field_14160:Lcom/mojang/authlib/GameProfile;
named	profile	Lnet/minecraft/server/network/ServerLoginNetworkHandler;profile:Lcom/mojang/authlib/GameProfile;

serverId

private final String serverId

See Also:

• Constant Field Values

Mappings:

Namespace	Name	Mixin selector
official	k	Ladw;k:Ljava/lang/String;
intermediary	field_14165	Lnet/minecraft/class_3248;field_14165:Ljava/lang/String;
named	serverId	Lnet/minecraft/server/network/ServerLoginNetworkHandler;serverId:Ljava/lang/String;

delayedPlayer

@Nullable
private @Nullable ServerPlayerEntity delayedPlayer

The delayed player, waiting to join the server once the existing player with the same UUID is gone.

This will only be non-null if the state is delay-accept, and is reset to null once the player is accepted.

Mappings:

Namespace	Name	Mixin selector
official	l	Ladw;l:Ladd;
intermediary	field_14161	Lnet/minecraft/class_3248;field_14161:Lnet/minecraft/class_3222;
named	delayedPlayer	Lnet/minecraft/server/network/ServerLoginNetworkHandler;delayedPlayer:Lnet/minecraft/server/network/ServerPlayerEntity;

Constructor Details

ServerLoginNetworkHandler

public ServerLoginNetworkHandler(MinecraftServer server,
 ClientConnection connection)

Mappings:

Namespace	Name	Mixin selector
official	<init>	Ladw;<init>(Lnet/minecraft/server/MinecraftServer;Lpf;)V
intermediary	<init>	Lnet/minecraft/class_3248;<init>(Lnet/minecraft/server/MinecraftServer;Lnet/minecraft/class_2535;)V
named	<init>	Lnet/minecraft/server/network/ServerLoginNetworkHandler;<init>(Lnet/minecraft/server/MinecraftServer;Lnet/minecraft/network/ClientConnection;)V

Method Details

tick

public void tick()

Ticks this login network handler.

This accepts the player to the server if ready. If the state is delay accept, it checks if the old player with the same UUID is gone and admits the player.

API Note:

This should only be called on the server thread.

Mappings:

Namespace	Name	Mixin selector
official	b	Ladw;b()V
intermediary	method_18785	Lnet/minecraft/class_3248;method_18785()V
named	tick	Lnet/minecraft/server/network/ServerLoginNetworkHandler;tick()V

getConnection

public ClientConnection getConnection()

Returns the connection this packet listener intends to listen to.

Specified by:

getConnection in interface PacketListener

See Also:

• ClientConnection.getPacketListener()

Mappings:

Namespace	Name	Mixin selector
official	a	Lpk;a()Lpf;
intermediary	method_2872	Lnet/minecraft/class_2547;method_2872()Lnet/minecraft/class_2535;
named	getConnection	Lnet/minecraft/network/listener/PacketListener;getConnection()Lnet/minecraft/network/ClientConnection;

disconnect

public void disconnect(Text reason)

Mappings:

Namespace	Name	Mixin selector
official	b	Ladw;b(Lpt;)V
intermediary	method_14380	Lnet/minecraft/class_3248;method_14380(Lnet/minecraft/class_2561;)V
named	disconnect	Lnet/minecraft/server/network/ServerLoginNetworkHandler;disconnect(Lnet/minecraft/text/Text;)V

acceptPlayer

public void acceptPlayer()

Creates the player to be added to the server and adds it to the server.

If a player with the same UUID is in the world, it will create the player and transition to the delay accept state.

API Note:

This method should only be called on the server thread.

Mappings:

Namespace	Name	Mixin selector
official	c	Ladw;c()V
intermediary	method_14384	Lnet/minecraft/class_3248;method_14384()V
named	acceptPlayer	Lnet/minecraft/server/network/ServerLoginNetworkHandler;acceptPlayer()V

addToServer

private void addToServer(ServerPlayerEntity player)

Mappings:

Namespace	Name	Mixin selector
official	a	Ladw;a(Ladd;)V
intermediary	method_33800	Lnet/minecraft/class_3248;method_33800(Lnet/minecraft/class_3222;)V
named	addToServer	Lnet/minecraft/server/network/ServerLoginNetworkHandler;addToServer(Lnet/minecraft/server/network/ServerPlayerEntity;)V

onDisconnected

public void onDisconnected(Text reason)

Called when the connection this listener listens to has disconnected. Can be used to display the disconnection reason.

Specified by:

onDisconnected in interface PacketListener

Parameters:

reason - the reason of disconnection; may be a generic message

Mappings:

Namespace	Name	Mixin selector
official	a	Lpk;a(Lpt;)V
intermediary	method_10839	Lnet/minecraft/class_2547;method_10839(Lnet/minecraft/class_2561;)V
named	onDisconnected	Lnet/minecraft/network/listener/PacketListener;onDisconnected(Lnet/minecraft/text/Text;)V

getConnectionInfo

public String getConnectionInfo()

Mappings:

Namespace	Name	Mixin selector
official	d	Ladw;d()Ljava/lang/String;
intermediary	method_14383	Lnet/minecraft/class_3248;method_14383()Ljava/lang/String;
named	getConnectionInfo	Lnet/minecraft/server/network/ServerLoginNetworkHandler;getConnectionInfo()Ljava/lang/String;

onHello

public void onHello(LoginHelloC2SPacket packet)

Specified by:

onHello in interface ServerLoginPacketListener

Mappings:

Namespace	Name	Mixin selector
official	a	Lwv;a(Lwx;)V
intermediary	method_12641	Lnet/minecraft/class_2911;method_12641(Lnet/minecraft/class_2915;)V
named	onHello	Lnet/minecraft/network/listener/ServerLoginPacketListener;onHello(Lnet/minecraft/network/packet/c2s/login/LoginHelloC2SPacket;)V

onKey

public void onKey(LoginKeyC2SPacket packet)

Specified by:

onKey in interface ServerLoginPacketListener

Mappings:

Namespace	Name	Mixin selector
official	a	Lwv;a(Lwy;)V
intermediary	method_12642	Lnet/minecraft/class_2911;method_12642(Lnet/minecraft/class_2917;)V
named	onKey	Lnet/minecraft/network/listener/ServerLoginPacketListener;onKey(Lnet/minecraft/network/packet/c2s/login/LoginKeyC2SPacket;)V

onQueryResponse

public void onQueryResponse(LoginQueryResponseC2SPacket packet)

Specified by:

onQueryResponse in interface ServerLoginPacketListener

Mappings:

Namespace	Name	Mixin selector
official	a	Lwv;a(Lww;)V
intermediary	method_12640	Lnet/minecraft/class_2911;method_12640(Lnet/minecraft/class_2913;)V
named	onQueryResponse	Lnet/minecraft/network/listener/ServerLoginPacketListener;onQueryResponse(Lnet/minecraft/network/packet/c2s/login/LoginQueryResponseC2SPacket;)V

toOfflineProfile

protected com.mojang.authlib.GameProfile toOfflineProfile(com.mojang.authlib.GameProfile profile)

Mappings:

Namespace	Name	Mixin selector
official	a	Ladw;a(Lcom/mojang/authlib/GameProfile;)Lcom/mojang/authlib/GameProfile;
intermediary	method_14375	Lnet/minecraft/class_3248;method_14375(Lcom/mojang/authlib/GameProfile;)Lcom/mojang/authlib/GameProfile;
named	toOfflineProfile	Lnet/minecraft/server/network/ServerLoginNetworkHandler;toOfflineProfile(Lcom/mojang/authlib/GameProfile;)Lcom/mojang/authlib/GameProfile;