Packet ID Registry

Every packet in LCE is registered in Packet::staticCtor() inside Minecraft.World/Packet.cpp. The map() call signature looks like this:

map(id, receiveOnClient, receiveOnServer, sendToAnyClient, renderStats, typeid, createFn)

Direction key:

• S->C means the server sends it to the client (receiveOnClient = true, receiveOnServer = false)
• C->S means the client sends it to the server (receiveOnClient = false, receiveOnServer = true)
• Both means either direction (receiveOnClient = true, receiveOnServer = true)

Packet Table (LCEMP)

ID	Class Name	Direction	Broadcast	Purpose
0	KeepAlivePacket	Both	yes	Connection keepalive heartbeat
1	LoginPacket	Both	yes	Login / session establishment
2	PreLoginPacket	Both	yes	Pre-login handshake
3	ChatPacket	Both	yes	Chat message
4	SetTimePacket	S->C	no	Set world time
5	SetEquippedItemPacket	S->C	no	Set entity equipped item
6	SetSpawnPositionPacket	S->C	yes	Set world spawn position
7	InteractPacket	C->S	no	Player interact with entity
8	SetHealthPacket	S->C	yes	Set player health / food / saturation
9	RespawnPacket	Both	yes	Player respawn / dimension change
10	MovePlayerPacket	Both	yes	Full player movement
11	MovePlayerPacket::Pos	Both	yes	Player position only
12	MovePlayerPacket::Rot	Both	yes	Player rotation only
13	MovePlayerPacket::PosRot	Both	yes	Player position and rotation
14	PlayerActionPacket	C->S	no	Block dig / drop / swap actions
15	UseItemPacket	C->S	no	Right-click / place block
16	SetCarriedItemPacket	C->S	no	Change held item slot
17	EntityActionAtPositionPacket	S->C	yes	Entity action at position (sleep in bed)
18	AnimatePacket	Both	yes	Entity animation (arm swing, etc.)
19	PlayerCommandPacket	C->S	no	Player command (sneak, sprint, etc.)
20	AddPlayerPacket	S->C	no	Spawn named player entity
22	TakeItemEntityPacket	S->C	yes	Entity picks up item
23	AddEntityPacket	S->C	no	Spawn object / vehicle entity
24	AddMobPacket	S->C	no	Spawn mob entity
25	AddPaintingPacket	S->C	no	Spawn painting entity
26	AddExperienceOrbPacket	S->C	no	Spawn experience orb (added 1.8.2)
28	SetEntityMotionPacket	S->C	yes	Set entity velocity (knockback)
29	RemoveEntitiesPacket	S->C	no	Destroy / remove entities
30	MoveEntityPacket	S->C	no	Entity movement (base)
31	MoveEntityPacket::Pos	S->C	no	Entity relative position
32	MoveEntityPacket::Rot	S->C	no	Entity rotation
33	MoveEntityPacket::PosRot	S->C	no	Entity relative position + rotation
34	TeleportEntityPacket	S->C	no	Entity teleport (absolute position)
35	RotateHeadPacket	S->C	no	Entity head rotation (added 1.2.3)
38	EntityEventPacket	S->C	yes	Entity status event (damage, death, etc.)
39	SetRidingPacket	S->C	yes	Attach entity to vehicle
40	SetEntityDataPacket	S->C	yes	Entity metadata (synched data)
41	UpdateMobEffectPacket	S->C	yes	Apply / update mob potion effect
42	RemoveMobEffectPacket	S->C	yes	Remove mob potion effect
43	SetExperiencePacket	S->C	yes	Set player experience bar
50	ChunkVisibilityPacket	S->C	yes	Chunk load / unload notification
51	BlockRegionUpdatePacket	S->C	yes	Full chunk data transfer
52	ChunkTilesUpdatePacket	S->C	yes	Multiple block changes in a chunk
53	TileUpdatePacket	S->C	yes	Single block change
54	TileEventPacket	S->C	yes	Block action (note block, piston, chest)
55	TileDestructionPacket	S->C	no	Block break animation progress (added 1.3.2)
60	ExplodePacket	S->C	yes	Explosion event
61	LevelEventPacket	S->C	yes	Level event (sounds, particles)
62	LevelSoundPacket	S->C	yes	Named sound event (added 1.3.2)
70	GameEventPacket	S->C	no	Game state change (rain, credits, etc.)
71	AddGlobalEntityPacket	S->C	no	Spawn global entity (lightning bolt)
100	ContainerOpenPacket	S->C	yes	Open container window
101	ContainerClosePacket	Both	yes	Close container window
102	ContainerClickPacket	C->S	no	Click slot in container
103	ContainerSetSlotPacket	Both	yes	Set single container slot
104	ContainerSetContentPacket	S->C	yes	Set entire container contents
105	ContainerSetDataPacket	S->C	yes	Update container property (furnace progress, etc.)
106	ContainerAckPacket	Both	yes	Container transaction acknowledgement
107	SetCreativeModeSlotPacket	Both	yes	Creative mode inventory action (added 1.8.2)
108	ContainerButtonClickPacket	C->S	no	Button click in container (added 1.0.1)
130	SignUpdatePacket	Both	yes	Edit sign text
131	ComplexItemDataPacket	S->C	yes	Map item data
132	TileEntityDataPacket	S->C	no	Tile entity NBT data (added 1.0.1)
150	CraftItemPacket	C->S	no	Craft item request (4J added)
151	TradeItemPacket	C->S	yes	Villager trade request (4J added)
152	DebugOptionsPacket	C->S	no	Debug options toggle (4J added)
153	ServerSettingsChangedPacket	Both	no	Server settings sync (4J added)
154	TexturePacket	Both	yes	Texture pack data (4J added)
155	ChunkVisibilityAreaPacket	S->C	yes	Chunk visibility area bounds (4J added)
156	UpdateProgressPacket	S->C	no	Loading / generation progress (4J added)
157	TextureChangePacket	Both	yes	Texture pack change notification (4J added)
158	UpdateGameRuleProgressPacket	S->C	yes	Game rule progress update (4J added)
159	KickPlayerPacket	C->S	no	Kick player request (4J added)
160	TextureAndGeometryPacket	Both	yes	Texture + geometry pack data (4J added)
161	TextureAndGeometryChangePacket	Both	yes	Texture + geometry change (4J added)
162	MoveEntityPacketSmall	S->C	no	Small entity movement (base, 4J added)
163	MoveEntityPacketSmall::Pos	S->C	no	Small entity relative position (4J added)
164	MoveEntityPacketSmall::Rot	S->C	no	Small entity rotation (4J added)
165	MoveEntityPacketSmall::PosRot	S->C	no	Small entity position + rotation (4J added)
166	XZPacket	Both	no	XZ coordinate packet (4J added)
167	GameCommandPacket	C->S	no	In-game command execution (4J added)
200	AwardStatPacket	S->C	yes	Award statistic to player
201	PlayerInfoPacket	Both	no	Player list info (repurposed by 4J, 1.8.2)
202	PlayerAbilitiesPacket	Both	yes	Player abilities (fly, creative, etc., added 1.3.2)
205	ClientCommandPacket	C->S	yes	Client command (respawn, stats, added 1.3.2)
250	CustomPayloadPacket	Both	yes	Plugin channel / custom payload (added 1.1 / TU9)
254	GetInfoPacket	C->S	no	Server list ping (added 1.8.2)
255	DisconnectPacket	Both	yes	Disconnect / kick reason

Additional Packets (MinecraftConsoles)

The MinecraftConsoles repo adds these packets not in the LCEMP source:

ID	Class Name	Direction	Broadcast	Purpose
27	PlayerInputPacket	C->S	no	Player vehicle input (was commented out in LCEMP, now active)
39	SetEntityLinkPacket	S->C	yes	Entity link / leash (replaces SetRidingPacket)
44	UpdateAttributesPacket	S->C	yes	Entity attribute sync (new)
63	LevelParticlesPacket	S->C	yes	Spawn particles at position (new)
133	TileEditorOpenPacket	S->C	yes	Open tile editor (command block, new)
206	SetObjectivePacket	S->C	yes	Scoreboard objective (new)
207	SetScorePacket	S->C	yes	Scoreboard score update (new)
208	SetDisplayObjectivePacket	S->C	yes	Scoreboard display slot (new)
209	SetPlayerTeamPacket	S->C	yes	Scoreboard team update (new)

Note

In MinecraftConsoles, SetCarriedItemPacket (16) changed from C->S only to Both directions. Packet 39 changed from SetRidingPacket to SetEntityLinkPacket to support the leash system alongside vehicle riding.

The scoreboard packets (206-209) support the scoreboard system added in TU19. These work with the /scoreboard command for objectives, scores, display positions, and teams.

Total registered packets (LCEMP): 88 (IDs 0 to 255, with gaps)

Total registered packets (MinecraftConsoles): 97 (IDs 0 to 255, with gaps)

Unused / Commented-Out IDs

These IDs show up in comments but aren’t registered in either codebase:

ID	Class Name	Notes
21	(gap)	No packet registered at this ID
203	ChatAutoCompletePacket	”Don’t think we need them” (1.3.2)
204	ClientInformationPacket	”Don’t think we need them” (1.3.2)
252	SharedKeyPacket	”Don’t think we need them” (1.3.2)
253	ServerAuthDataPacket	”Don’t think we need them” (1.3.2)

Note

ID 27 (PlayerInputPacket) was commented out in LCEMP but is active in MinecraftConsoles.

Notes

• The Broadcast column matches the sendToAnyClient parameter. When yes, the packet goes to all connected clients. When no, it’s sent per-dimension per-machine (a 4J splitscreen optimization).
• Packets marked (4J added) are custom additions by 4J Studios for the Legacy Console Edition and don’t exist in vanilla Java Edition.
• MoveEntityPacketSmall (162 to 165) is an optimized version of MoveEntityPacket (30 to 33) for smaller position changes.
• ContainerSetSlotPacket (103) has conditional direction: in non-content-package builds it can also be sent C->S for debug purposes. This is the same in both codebases.
• The renderStats parameter controls which packets show up in the debug network stats overlay. Packets with renderStats = true tend to be the high-traffic ones like entity movement and chunk data.

Source files:

• LCEMP: Minecraft.World/Packet.cpp
• MinecraftConsoles: Minecraft.World/Packet.cpp