Pre-release protocol

This page documents the changes from the last stable Minecraft release (currently 1.12.2, protocol 340) to the current pre-release (currently 17w47b, protocol 347). Note that this page contains bleeding-edge information that may not be completely or correctly documented.

One who wishes to commandeer the merging of this into Protocol when an update is made must be sure to respect any changes that may have occurred to the respective packets there.

Contents

Data types

No changes so far.

Packets

ID	Packet name	Documentation
Handshaking serverbound
0x00	Handshake	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
Play clientbound
0x07	Statistics	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x0F}}{{#if:0x0E|{{#if:0x0F| }}0x0E}}	Chat Message (clientbound)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x10}}{{#if:0x0F|{{#if:0x10| }}0x0F}}	Multi Block Change	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x0E}}{{#if:0x10|{{#if:0x0E| }}0x10}}	Tab-Complete (clientbound)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x11	Declare Commands	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x11}}{{#if:0x12|{{#if:0x11| }}0x12}}	Confirm Transaction (clientbound)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x12}}{{#if:0x13|{{#if:0x12| }}0x13}}	Close Window (clientbound)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x13}}{{#if:0x14|{{#if:0x13| }}0x14}}	Open Window	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x14}}{{#if:0x15|{{#if:0x14| }}0x15}}	Window Items	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x15}}{{#if:0x16|{{#if:0x15| }}0x16}}	Window Property	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x16}}{{#if:0x17|{{#if:0x16| }}0x17}}	Set Slot	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x17}}{{#if:0x18|{{#if:0x17| }}0x18}}	Set Cooldown	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x18}}{{#if:0x19|{{#if:0x18| }}0x19}}	Plugin Message (clientbound)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x19}}{{#if:0x1A|{{#if:0x19| }}0x1A}}	Named Sound Effect	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1A}}{{#if:0x1B|{{#if:0x1A| }}0x1B}}	Disconnect (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1B}}{{#if:0x1C|{{#if:0x1B| }}0x1C}}	Entity Status	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1C}}{{#if:0x1D|{{#if:0x1C| }}0x1D}}	Explosion	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1D}}{{#if:0x1E|{{#if:0x1D| }}0x1E}}	Unload Chunk	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1E}}{{#if:0x1F|{{#if:0x1E| }}0x1F}}	Change Game State	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1F}}{{#if:0x20|{{#if:0x1F| }}0x20}}	Keep Alive (clientbound)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x20}}{{#if:0x21|{{#if:0x20| }}0x21}}	Chunk Data	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x21}}{{#if:0x22|{{#if:0x21| }}0x22}}	Effect	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x22}}{{#if:0x23|{{#if:0x22| }}0x23}}	Particle	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x23}}{{#if:0x24|{{#if:0x23| }}0x24}}	Join Game	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x24}}{{#if:0x25|{{#if:0x24| }}0x25}}	Map	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x25}}{{#if:0x26|{{#if:0x25| }}0x26}}	Entity	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x26}}{{#if:0x27|{{#if:0x26| }}0x27}}	Entity Relative Move	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x27}}{{#if:0x28|{{#if:0x27| }}0x28}}	Entity Look And Relative Move	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x28}}{{#if:0x29|{{#if:0x28| }}0x29}}	Entity Look	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x29}}{{#if:0x2A|{{#if:0x29| }}0x2A}}	Vehicle Move (clientbound)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2A}}{{#if:0x2B|{{#if:0x2A| }}0x2B}}	Open Sign Editor	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2B}}{{#if:0x2C|{{#if:0x2B| }}0x2C}}	Craft Recipe Response	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2C}}{{#if:0x2D|{{#if:0x2C| }}0x2D}}	Player Abilities (clientbound)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2D}}{{#if:0x2E|{{#if:0x2D| }}0x2E}}	Combat Event	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2E}}{{#if:0x2F|{{#if:0x2E| }}0x2F}}	Player List Item	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2F}}{{#if:0x30|{{#if:0x2F| }}0x30}}	Player Position And Look (clientbound)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x30}}{{#if:0x31|{{#if:0x30| }}0x31}}	Use Bed	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x31}}{{#if:0x32|{{#if:0x31| }}0x32}}	Unlock Recipes	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x32}}{{#if:0x33|{{#if:0x32| }}0x33}}	Destroy Entities	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x33}}{{#if:0x34|{{#if:0x33| }}0x34}}	Remove Entity Effect	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x34}}{{#if:0x35|{{#if:0x34| }}0x35}}	Resource Pack Send	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x35}}{{#if:0x36|{{#if:0x35| }}0x36}}	Respawn	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x36}}{{#if:0x37|{{#if:0x36| }}0x37}}	Entity Head Look	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x37}}{{#if:0x38|{{#if:0x37| }}0x38}}	Select Advancement Tab	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x38}}{{#if:0x39|{{#if:0x38| }}0x39}}	World Border	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x39}}{{#if:0x3A|{{#if:0x39| }}0x3A}}	Camera	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x3A}}{{#if:0x3B|{{#if:0x3A| }}0x3B}}	Held Item Change (clientbound)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x3B}}{{#if:0x3C|{{#if:0x3B| }}0x3C}}	Display Scoreboard	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x3C}}{{#if:0x3D|{{#if:0x3C| }}0x3D}}	Entity Metadata	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x3D}}{{#if:0x3E|{{#if:0x3D| }}0x3E}}	Attach Entity	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x3E}}{{#if:0x3F|{{#if:0x3E| }}0x3F}}	Entity Velocity	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x3F}}{{#if:0x40|{{#if:0x3F| }}0x40}}	Entity Equipment	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x40}}{{#if:0x41|{{#if:0x40| }}0x41}}	Set Experience	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x41}}{{#if:0x42|{{#if:0x41| }}0x42}}	Update Health	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x42}}{{#if:0x43|{{#if:0x42| }}0x43}}	Scoreboard Objective	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x43}}{{#if:0x44|{{#if:0x43| }}0x44}}	Set Passengers	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x44}}{{#if:0x45|{{#if:0x44| }}0x45}}	Teams	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x45}}{{#if:0x46|{{#if:0x45| }}0x46}}	Update Score	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x46}}{{#if:0x47|{{#if:0x46| }}0x47}}	Spawn Position	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x47}}{{#if:0x48|{{#if:0x47| }}0x48}}	Time Update	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x48}}{{#if:0x49|{{#if:0x48| }}0x49}}	Title	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x4A	Stop Sound	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x49}}{{#if:0x4B|{{#if:0x49| }}0x4B}}	Sound Effect	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x4A}}{{#if:0x4C|{{#if:0x4A| }}0x4C}}	Player List Header And Footer	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x4B}}{{#if:0x4D|{{#if:0x4B| }}0x4D}}	Collect Item	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x4C}}{{#if:0x4E|{{#if:0x4C| }}0x4E}}	Entity Teleport	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x4D}}{{#if:0x4F|{{#if:0x4D| }}0x4F}}	Advancements	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x4E}}{{#if:0x50|{{#if:0x4E| }}0x50}}	Entity Properties	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x4F}}{{#if:0x51|{{#if:0x4F| }}0x51}}	Entity Effect	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
Play serverbound
0x02}}{{#if:0x01|{{#if:0x02| }}0x01}}	Chat Message (serverbound)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x03}}{{#if:0x02|{{#if:0x03| }}0x02}}	Client Status	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x04}}{{#if:0x03|{{#if:0x04| }}0x03}}	Client Settings	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x01}}{{#if:0x04|{{#if:0x01| }}0x04}}	Tab-Complete (serverbound)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}

New/modified data types

No changes so far.

Block Actions

No changes so far.

Plugin Channels

MC|StopSound

{{#if:Server to client|Server to client}}{{#if:|{{#if:Server to client| }}{{{2}}}}}

{{#if:Used to implement the /stopsound command. Stops a sound that is currently playing on the client.|Used to implement the /stopsound command. Stops a sound that is currently playing on the client.}}{{#if:|{{#if:Used to implement the /stopsound command. Stops a sound that is currently playing on the client.| }}{{{2}}}}}

Field name	Field type	Notes
Sound category	String	Should be one of the sound categories used in Named Sound Effect, but if it's invalid or empty then it is (intentionally) treated as all sound categories.
Sound name	String	A sound effect name. If left empty, all sounds are stopped.

{{#if:Emptiness of sound category or sound name can be combined, IE a empty sound name but a set sound category will stop all sounds in the given category.|Emptiness of sound category or sound name can be combined, IE a empty sound name but a set sound category will stop all sounds in the given category.}}{{#if:|{{#if:Emptiness of sound category or sound name can be combined, IE a empty sound name but a set sound category will stop all sounds in the given category.| }}{{{2}}}}}

{{#if:|}}{{#if:This plugin channel has been replaced by the stop sound packet.|{{#if:| }}This plugin channel has been replaced by the stop sound packet.}}

Play

Clientbound

Statistics

Sent as a response to Client Status (id 1).

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x07	Play	Client	Count		VarInt		Number of elements in the following array
			Statistic	Name	Array	String (32767)	https://gist.github.com/Alvin-LB/8d0d13db00b3c00fd0e822a562025eff
				Unknown 1		VarInt
				Unknown 2		VarInt
				Value		VarInt	The amount to set it to

Tab-Complete (clientbound)

	The following information needs to be added to this page:
	This is most definitely no longer an accurate description of this packet

The server responds with a list of auto-completions of the last word sent to it. In the case of regular chat, this is a player username. Command names and parameters are also supported. The client sorts these alphabetically before listing them.

Packet ID	State	Bound To	Field Name	Field Type	Notes
{{#if:0x0E|0x0E}}{{#if:0x10|{{#if:0x0E| }}0x10}}	Play	Client	Transaction Id	VarInt	This id should also be used in the tab completion response packet, or it will be ignored.
			Start	VarInt
			Length	VarInt
			Count	VarInt	Number of elements in the following array
			Matches	Array of String (32767)	One eligible command, note that each command is sent separately instead of in a single string, hence the need for Count

Declare Commands

	The following information needs to be added to this page:
	This information is probably incomplete/inaccurate

Lists all of the commands on the server, and how they are parsed.

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x11	Play	Client	Count	VarInt	Length of the following array
			Nodes	Array of Node	A array of CommandNodes
			Root index	VarInt	Index of the RootCommandNode in the previous array

Node:

Field Name	Field Type	Notes
Flags	Byte (read) and VarInt (written)	Writing as VarInt doesn't currently cause any problems because there aren't more then 7 bits used, but it's something to look out for (don't set more than the 7 lowest bits, or things will break). Bit mask Meaning 0x03 Type of the CommandNode 0 RootCommandNode 1 LiteralCommandNode 2 ArgumentCommandNode 0x04 Has command 0x08 Has redirect node 0x10 Has custom suggestions, currently only present if the type is a ArgumentCommandNode
Children Count	VarInt	Length of the following array
Children	Array of VarInt	The indexes of the children CommandNodes within the Nodes array
Redirect node	Optional VarInt	Only if flags & 0x08. Points to the redirect CommandNode within the Nodes array
Extra node data	Extra node data	Type depends on the CommandNode type, see below.

Extra node data:

Type	Field Name	Field Type	Notes
RootCommandNode	Empty	Empty
LiteralCommandNode	Literal	String (32767)	The text
ArgumentCommandNode	Name	String (32767)	The name of the argument
	Parser	Identifier	One of several known to the client, listed below. If the client does not know the parser, reading this RequiredArgumentBuilder stops immediately (following fields are not read)
	Properties	Optional, varies	See below. Varies depending on the parser.
	Suggests	Optional Identifier	Only present if (flags & 0x10) != 0. See below for the available types.

Parsers:

Identifier	Description	Properties
brigadier:bool	Boolean value (true or false, case-sensitive)	None
brigadier:double	Double	Specifies min and max values: Name Type Description Flags Byte Min Optional double Only if flags & 0x01. If not specified, defaults to -Double.MAX_VALUE (≈ -1.7976931348623157E307) Max Optional double Only if flags & 0x02. If not specified, defaults to Double.MAX_VALUE (≈ 1.7976931348623157E307)
brigadier:float	Float	Specifies min and max values: Name Type Description Flags Byte Min Optional float Only if flags & 0x01. If not specified, defaults to -Float.MAX_VALUE (≈ -3.4028235E38) Max Optional float Only if flags & 0x02. If not specified, defaults to Float.MAX_VALUE (≈ 3.4028235E38)
brigadier:integer	Integer	Specifies min and max values: Name Type Description Flags Byte Min Optional integer Only if flags & 0x01. If not specified, defaults to Integer.MIN_VALUE (-2147483648) Max Optional integer Only if flags & 0x02. If not specified, defaults to Integer.MAX_VALUE (2147483647)
brigadier:string	A string	A VarInt enum: Value Name Description 0 SINGLE_WORD Reads a single word 1 QUOTABLE_PHRASE If it starts with a ", keeps reading until another " (allowing escaping with \). Otherwise behaves the same as SINGLE_WORD 2 GREEDY_PHRASE Reads the rest of the content after the cursor. Quotes will not be removed.
minecraft:entity	A selector, player name, or UUID.	Has a single flags byte: Bit mask Meaning 0x01 Only allows 1 entity/player 0x02 Only allows players
minecraft:game_profile	A player, online or not. Can also use a selector, which may match one or more players (but not entities).	None
minecraft:block_pos	A location, represented as 3 numbers (which must be integers). May use relative locations with ~.	None
minecraft:vec3	A location, represented as 3 numbers (which may have a decimal point, but will be moved to the center of a block if none is specified). May use relative locations with ~.	None
minecraft:vec2	A location, represented as 2 numbers (which may have a decimal point, but will be moved to the center of a block if none is specified). May use relative locations with ~.	None
minecraft:block	A block state, optionally including NBT and state information.	None
minecraft:item	An item, optionally including NBT.	None
minecraft:color	A chat color. One of the names from Chat#Colors, or reset. Case-insensitive.	None
minecraft:component	A JSON Chat component.	None
minecraft:message	A regular message, potentially including selectors.	None
minecraft:nbt	An NBT value, parsed using JSON-NBT rules.	None
minecraft:nbt_path	A path within an NBT value, allowing for array and member accesses.	None
minecraft:objective	A scoreboard objective.	None
minecraft:objective_criteria	A single score criterion.	None
minecraft:operation	A scoreboard operator	None
minecraft:particle	A particle effect (an identifier with extra information following it for specific particles, mirroring the Particle packet)	None
minecraft:rotation	An angle, represented as 2 numbers (which may have a decimal point, but will be moved to the center of a block if none is specified). May use relative locations with ~.	None
minecraft:scoreboard_slot	A scoreboard display position slot. list, sidebar, belowName, and sidebar.team.${color} for all chat colors (reset is not included)	None
minecraft:score_holder	Something that can join a team. Allows selectors and *.	Has a single flags byte: Bit mask Meaning 0x01 Unknown. 0x02 Unknown.
minecraft:swizzle	A collection of up to 3 axes.	None
minecraft:team	The name of a team. Parsed as an unquoted string.	None
minecraft:item_slot	A name for an inventory slot.	None
minecraft:resource_location	An Identifier.	None
minecraft:mob_effect	A potion effect.	None

Suggestion types:

Identifier	Description
minecraft:ask_server	Sends the Tab-Complete packet to the server to request tab completions.
minecraft:all_recipes	Suggests all the available recipes.
minecraft:available_sounds	Suggests all the available sounds.
minecraft:summonable_entities	Suggests all the summonable entities.

Named Sound Effect

See also: #Sound Effect{{#if:| for {{{for}}}}}

Used to play a sound effect on the client. Custom sounds may be added by resource packs.

Packet ID	State	Bound To	Field Name	Field Type	Notes
{{#if:0x19|0x19}}{{#if:0x1A|{{#if:0x19| }}0x1A}}	Play	Client	Sound Name	String (256)}}{{#if:Identifier|{{#if:String (256)| }}Identifier}}	All sound effect names as of 1.12.2 can be seen here.
			Sound Category	VarInt Enum	The category that this sound will be played from (current categories)
			Effect Position X	Int	Effect X multiplied by 8 (fixed-point number with only 3 bits dedicated to the fractional part)
			Effect Position Y	Int	Effect Y multiplied by 8 (fixed-point number with only 3 bits dedicated to the fractional part)
			Effect Position Z	Int	Effect Z multiplied by 8 (fixed-point number with only 3 bits dedicated to the fractional part)
			Volume	Float	1 is 100%, can be more
			Pitch	Float	Float between 0.5 and 2.0 by Notchian clients

Chunk Data

Main article: Chunk Format

See also: #Unload Chunk{{#if:| for {{{for}}}}}

	The following information needs to be added to this page:
	This packet most likely did change with the flattening, but the exact changes are not known yet.

The server only sends skylight information for chunk pillars in the Overworld, it's up to the client to know in which dimenison the player is currently located. You can also infer this information from the primary bitmask and the amount of uncompressed bytes sent. This packet also sends all block entities in the chunk (though sending them is not required; it is still legal to send them with Update Block Entity later).

Packet ID	State	Bound To	Field Name	Field Type	Notes
{{#if:0x20|0x20}}{{#if:0x21|{{#if:0x20| }}0x21}}	Play	Client	Chunk X	Int	Chunk coordinate (block coordinate divided by 16, rounded down)
			Chunk Z	Int	Chunk coordinate (block coordinate divided by 16, rounded down)
			Ground-Up Continuous	Boolean	See Chunk Format
			Primary Bit Mask	VarInt	Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
			Size	VarInt	Size of Data in bytes
			Data	Byte array	See data structure in Chunk Format
			Number of block entities	VarInt	Length of the following array
			Block entities	Array of NBT Tag	All block entities in the chunk. Use the x, y, and z tags in the NBT to determine their positions.

Particle

Displays the named particle

Packet ID	State	Bound To	Field Name	Field Type	Notes
{{#if:0x22|0x22}}{{#if:0x23|{{#if:0x22| }}0x23}}	Play	Client	Particle ID	Int	See below
			Long Distance	Boolean	If true, particle distance increases from 256 to 65536
			X	Float	X position of the particle
			Y	Float	Y position of the particle
			Z	Float	Z position of the particle
			Offset X	Float	This is added to the X position after being multiplied by random.nextGaussian()
			Offset Y	Float	This is added to the Y position after being multiplied by random.nextGaussian()
			Offset Z	Float	This is added to the Z position after being multiplied by random.nextGaussian()
			Particle Data	Float	The data of each particle
			Particle Count	Int	The number of particles to create
			Data	Array of VarInt}}{{#if:Varies|{{#if:Array of VarInt| }}Varies}}	Length depends on particle. "iconcrack" has length of 2, "blockcrack", "blockdust", and "fallingdust" have lengths of 1, the rest have 0.}}{{#if:Type of data varies based off of the particle. For "iconcrack", it is a Slot. For "blockcrack", "blockdust", and "fallingdust", it is a block state encoded as a VarInt that is an index within the global palette.|{{#if:Length depends on particle. "iconcrack" has length of 2, "blockcrack", "blockdust", and "fallingdust" have lengths of 1, the rest have 0.| }}Type of data varies based off of the particle. For "iconcrack", it is a Slot. For "blockcrack", "blockdust", and "fallingdust", it is a block state encoded as a VarInt that is an index within the global palette.}}

Stop Sound

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x4A	Play	Client	Flags	Byte	Controls which fields are present.
			Source	Optional VarInt enum	Only if flags is 3 or 1 (bit mask 0x1). See below. If not present, then sounds from all sources are cleared.
			Sound	Optional Identifier	Only if flags is 2 or 3 (bit mask 0x2). A sound effect name, see Named Sound Effect. If not present, then all sounds are cleared.

Categories:

Name	Value
master	0
music	1
record	2
weather	3
block	4
hostile	5
neutral	6
player	7
ambient	8
voice	9

Serverbound

Tab-Complete (serverbound)

	The following information needs to be added to this page:
	This is most definitely no longer an accurate description of this packet

Sent when the user presses tab while writing text.

Packet ID	State	Bound To	Field Name	Field Type	Notes
{{#if:0x01|0x01}}{{#if:0x04|{{#if:0x01| }}0x04}}	Play	Server	Transaction Id	VarInt	The id received in the tab completion request packet, must match or the client will ignore this packet.
			Text	String (32767)	All text behind the cursor without the / (e.g. to the left of the cursor in left-to-right languages like English)
			Assume Command	Boolean	If true, the server will parse Text as a command even if it doesn't start with a /. Used in the command block GUI.
			Has Position	Boolean
			Looked At Block	Optional Position	The position of the block being looked at. Only sent if Has Position is true.

Handshaking

Clientbound

There are no clientbound packets in the Handshaking state, since the protocol immediately switches to a different state after the client sends the first packet.

Serverbound

Handshake

This causes the server to switch into the target state.

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x00	Handshaking	Server	Protocol Version	VarInt	See protocol version numbers (currently {{#if:340|340}}{{#if:347|{{#if:340| }}347}})
			Server Address	String	Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect. The Notchian server does not use this information.
			Server Port	Unsigned Short	Default is 25565. The Notchian server does not use this information.
			Next State	VarInt Enum	1 for status, 2 for login

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

No changes so far.

Serverbound

No changes so far.