Difference between revisions of "Pre-release protocol"

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This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.8.9, protocol 47]]) to the current pre-release (currently [[Protocol version numbers|15w51b, protocol 94]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
+
There are currently no pre-release versions available to document on this page. For the latest stable Minecraft release, see the [[Protocol|Protocol]] page. For previous pre-release pages, see the [[Protocol version numbers|Protocol version numbers]] page.
  
 
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.
 
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.
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=== Data types ===
 
=== Data types ===
  
* [[#Chunk Section|Chunk Section]]
+
No changes so far.
* [[#Entity Metadata|Entity Metadata]]
 
  
 
=== Packets ===
 
=== Packets ===
 
{| class="wikitable"
 
! ID
 
! Packet name
 
! colspan=2 | Documentation
 
|-
 
! colspan=4 | Handshaking serverbound
 
{{PacketList|0x00|Handshake}}
 
|-
 
! colspan=4 | Play clientbound
 
{{PacketList|{{Change|0x0E|0x00}}|Spawn Object}}
 
{{PacketList|{{Change|0x11|0x01}}|Spawn Experience Orb|pre=unchanged}}
 
{{PacketList|{{Change|0x2C|0x02}}|Spawn Global Entity|pre=unchanged}}
 
{{PacketList|{{Change|0x0F|0x03}}|Spawn Mob}}
 
{{PacketList|{{Change|0x10|0x04}}|Spawn Painting|pre=unchanged}}
 
{{PacketList|{{Change|0x0C|0x05}}|Spawn Player}}
 
{{PacketList|{{Change|0x0B|0x06}}|Animation|pre=unchanged}}
 
{{PacketList|{{Change|0x37|0x07}}|Statistics|pre=unchanged}}
 
{{PacketList|{{Change|0x25|0x08}}|Block Break Animation|pre=unchanged}}
 
{{PacketList|{{Change|0x35|0x09}}|Update Block Entity|pre=unchanged}}
 
{{PacketList|{{Change|0x24|0x0A}}|Block Action|pre=unchanged}}
 
{{PacketList|{{Change|0x23|0x0B}}|Block Change|pre=unchanged}}
 
{{PacketList|0x0C|Boss Bar|rel=added}}
 
{{PacketList|{{Change|0x41|0x0D}}|Server Difficulty|pre=unchanged}}
 
{{PacketList|{{Change|0x3A|0x0E}}|Tab-Complete|pre=unchanged}}
 
{{PacketList|{{Change|0x02|0x0F}}|Chat Message|pre=unchanged}}
 
{{PacketList|{{Change|0x22|0x10}}|Multi Block Change|pre=unchanged}}
 
{{PacketList|{{Change|0x32|0x11}}|Confirm Transaction|pre=unchanged}}
 
{{PacketList|{{Change|0x2E|0x12}}|Close Window|pre=unchanged}}
 
{{PacketList|{{Change|0x2D|0x13}}|Open Window|pre=unchanged}}
 
{{PacketList|{{Change|0x30|0x14}}|Window Items|pre=unchanged}}
 
{{PacketList|{{Change|0x31|0x15}}|Window Property|pre=unchanged}}
 
{{PacketList|{{Change|0x2F|0x16}}|Set Slot|pre=unchanged}}
 
{{PacketList|0x17|Set Cooldown|rel=added}}
 
{{PacketList|{{Change|0x3F|0x18}}|Plugin Message|pre=unchanged}}
 
{{PacketList|{{Change|0x2F|0x19}}|Named Sound Effect|rel=Sound Effect|pre=unchanged}}
 
{{PacketList|{{Change|0x40|0x1A}}|Disconnect|pre=unchanged}}
 
{{PacketList|{{Change|0x1A|0x1B}}|Entity Status}}
 
{{PacketList|{{Change|0x27|0x1C}}|Explosion|pre=unchanged}}
 
{{PacketList|0x1D|Unload Chunk|rel=added}}
 
{{PacketList|{{Change|0x2B|0x1E}}|Change Game State|pre=unchanged}}
 
{{PacketList|{{Change|0x00|0x1F}}|Keep Alive|pre=unchanged}}
 
{{PacketList|{{Change|0x21|0x20}}|Chunk Data}}
 
{{PacketList|{{Change|0x28|0x21}}|Effect|pre=unchanged}}
 
{{PacketList|{{Change|0x2A|0x22}}|Particle|pre=unchanged}}
 
{{PacketList|{{Change|0x01|0x23}}|Join Game|pre=unchanged}}
 
{{PacketList|{{Change|0x34|0x24}}|Map}}
 
{{PacketList|{{Change|0x15|0x25}}|Entity Relative Move|pre=unchanged}}
 
{{PacketList|{{Change|0x17|0x26}}|Entity Look And Relative Move|pre=unchanged}}
 
{{PacketList|{{Change|0x16|0x27}}|Entity Look|pre=unchanged}}
 
{{PacketList|{{Change|0x14|0x28}}|Entity|pre=unchanged}}
 
{{PacketList|0x29|Vehicle Move|rel=added}}
 
{{PacketList|{{Change|0x36|0x2A}}|Open Sign Editor|pre=unchanged}}
 
{{PacketList|{{Change|0x39|0x2B}}|Player Abilities|pre=unchanged}}
 
{{PacketList|{{Change|0x42|0x2C}}|Combat Event}}
 
{{PacketList|{{Change|0x38|0x2D}}|Player List Item|pre=unchanged}}
 
{{PacketList|{{Change|0x08|0x2E}}|Player Position And Look}}
 
{{PacketList|{{Change|0x0A|0x2F}}|Use Bed|pre=unchanged}}
 
{{PacketList|{{Change|0x13|0x30}}|Destroy Entities|pre=unchanged}}
 
{{PacketList|{{Change|0x1E|0x31}}|Remove Entity Effect|pre=unchanged}}
 
{{PacketList|{{Change|0x48|0x32}}|Resource Pack Send|pre=unchanged}}
 
{{PacketList|{{Change|0x07|0x33}}|Respawn|pre=unchanged}}
 
{{PacketList|{{Change|0x19|0x34}}|Entity Head Look|pre=unchanged}}
 
{{PacketList|{{Change|0x44|0x35}}|World Border|pre=unchanged}}
 
{{PacketList|{{Change|0x43|0x36}}|Camera|pre=unchanged}}
 
{{PacketList|{{Change|0x09|0x37}}|Held Item Change|pre=unchanged}}
 
{{PacketList|{{Change|0x3D|0x38}}|Display Scoreboard|pre=unchanged}}
 
{{PacketList|{{Change|0x1C|0x39}}|Entity Metadata|pre=unchanged}}
 
{{PacketList|{{Change|0x1B|0x3A}}|Attach Entity|pre=unchanged}}
 
{{PacketList|{{Change|0x12|0x3B}}|Entity Velocity|pre=unchanged}}
 
{{PacketList|{{Change|0x04|0x3C}}|Entity Equipment}}
 
{{PacketList|{{Change|0x1F|0x3D}}|Set Experience|pre=unchanged}}
 
{{PacketList|{{Change|0x06|0x3E}}|Update Health|pre=unchanged}}
 
{{PacketList|{{Change|0x3B|0x3F}}|Scoreboard Objective|pre=unchanged}}
 
{{PacketList|0x40|Set Passengers|rel=added}}
 
{{PacketList|{{Change|0x3E|0x41}}|Teams}}
 
{{PacketList|{{Change|0x3C|0x42}}|Update Score|pre=unchanged}}
 
{{PacketList|{{Change|0x05|0x43}}|Spawn Position|pre=unchanged}}
 
{{PacketList|{{Change|0x03|0x44}}|Time Update|pre=unchanged}}
 
{{PacketList|{{Change|0x45|0x45}}|Title|pre=unchanged}}
 
{{PacketList|{{Change|0x33|0x46}}|Update Sign|pre=unchanged}}
 
{{PacketList|0x47|Sound Effect|rel=added}}
 
{{PacketList|{{Change|0x47|0x48}}|Player List Header And Footer|pre=unchanged}}
 
{{PacketList|{{Change|0x0D|0x49}}|Collect Item|pre=unchanged}}
 
{{PacketList|{{Change|0x18|0x4A}}|Entity Teleport|pre=unchanged}}
 
{{PacketList|{{Change|0x20|0x4B}}|Entity Properties}}
 
{{PacketList|{{Change|0x1D|0x4C}}|Entity Effect|pre=unchanged}}
 
{{PacketList|0x26|Map Chunk Bulk|pre=removed}}
 
{{PacketList|0x46|Set Compression|pre=removed}}
 
{{PacketList|0x49|Update Entity NBT|pre=removed}}
 
|-
 
! colspan=4 | Play serverbound
 
{{PacketList|0x00|Teleport Confirm|rel=added}}
 
{{PacketList|{{Change|0x14|0x01}}|Tab-Complete|rel=Tab-Complete 2|pre=unchanged}}
 
{{PacketList|0x02|Chat Message|rel=Chat Message 2|pre=unchanged}}
 
{{PacketList|{{Change|0x16|0x03}}|Client Status}}
 
{{PacketList|{{Change|0x15|0x04}}|Client Settings}}
 
{{PacketList|{{Change|0x0F|0x05}}|Confirm Transaction|rel=Confirm Transaction 2|pre=unchanged}}
 
{{PacketList|{{Change|0x11|0x06}}|Enchant Item|pre=unchanged}}
 
{{PacketList|{{Change|0x0E|0x07}}|Click Window|pre=unchanged}}
 
{{PacketList|{{Change|0x0D|0x08}}|Close Window|rel=Close Window 2|pre=unchanged}}
 
{{PacketList|{{Change|0x17|0x09}}|Plugin Message|rel=Plugin Message 2|pre=unchanged}}
 
{{PacketList|{{Change|0x02|0x0A}}|Use Entity}}
 
{{PacketList|{{Change|0x00|0x0B}}|Keep Alive|rel=Keep Alive 2|pre=unchanged}}
 
{{PacketList|{{Change|0x04|0x0C}}|Player Position|pre=unchanged}}
 
{{PacketList|{{Change|0x06|0x0D}}|Player Position And Look|rel=Player Position And Look 2|pre=unchanged}}
 
{{PacketList|{{Change|0x05|0x0E}}|Player Look|pre=unchanged}}
 
{{PacketList|{{Change|0x03|0x0F}}|Player|pre=unchanged}}
 
{{PacketList|0x10|Vehicle Move?|rel=added}}
 
{{PacketList|0x11|Steer Boat|rel=added}}
 
{{PacketList|{{Change|0x13|0x12}}|Player Abilities|rel=Player Abilities 2|pre=unchanged}}
 
{{PacketList|{{Change|0x07|0x13}}|Player Digging}}
 
{{PacketList|{{Change|0x0B|0x14}}|Entity Action}}
 
{{PacketList|{{Change|0x0C|0x15}}|Steer Vehicle|pre=unchanged}}
 
{{PacketList|{{Change|0x19|0x16}}|Resource Pack Status|pre=unchanged}}
 
{{PacketList|{{Change|0x09|0x17}}|Held Item Change|rel=Held Item Change 2|pre=unchanged}}
 
{{PacketList|{{Change|0x10|0x18}}|Creative Inventory Action|pre=unchanged}}
 
{{PacketList|{{Change|0x12|0x19}}|Update Sign|rel=Update Sign 2}}
 
{{PacketList|{{Change|0x0A|0x1A}}|Animation|rel=Animation 2}}
 
{{PacketList|{{Change|0x18|0x1B}}|Spectate|pre=unchanged}}
 
{{PacketList|{{Change|0x08|0x1C}}|Player Block Placement}}
 
{{PacketList|0x1D|Use Item|rel=added}}
 
|-
 
! colspan=4 | Status clientbound
 
{{PacketList|0x00|Response|pre=unchanged}}
 
{{PacketList|0x01|Pong|pre=unchanged}}
 
|-
 
! colspan=4 | Status serverbound
 
{{PacketList|0x00|Request|pre=unchanged}}
 
{{PacketList|0x01|Ping|pre=unchanged}}
 
|-
 
! colspan=4 | Login clientbound
 
{{PacketList|0x00|Disconnect|rel=Disconnect 2|pre=unchanged}}
 
{{PacketList|0x01|Encryption Request|pre=unchanged}}
 
{{PacketList|0x02|Login Success|pre=unchanged}}
 
{{PacketList|0x03|Set Compression|rel=Set Compression 2|pre=unchanged}}
 
|-
 
! colspan=4 | Login serverbound
 
{{PacketList|0x00|Login Start|pre=unchanged}}
 
{{PacketList|0x01|Encryption Response|pre=unchanged}}
 
|}
 
 
== New/modified data types ==
 
 
=== Chunk Section ===
 
 
Format is now:
 
 
{| class="wikitable"
 
|-
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
| Bits Per Block
 
| Unsigned Byte
 
| How many bits per block in Data Array. If 0, the Palette Length and Palette fields are omitted and the global palette (with 13 bits per block) is used.
 
|-
 
| Palette Length
 
| Optional VarInt
 
| Length of the following array
 
|-
 
| Palette
 
| Optional Array of VarInt
 
| Mapping of block state IDs in the global palette to indices of this array
 
|-
 
| Data Array Length
 
| VarInt
 
| Number of bytes in the following array, divided by 8 (given as such because Notchian implements Data Array as an Array of Long)
 
|-
 
| Data Array
 
| Byte Array
 
| List of 4096 indices pointing to state IDs in the Palette, followed by padding to round the length up to the next multiple of 8 bytes
 
|-
 
| Block Light
 
| Byte Array
 
| Half byte per block
 
|-
 
| Sky Light
 
| Optional Byte Array
 
| Only if in the Overworld; half byte per block
 
|}
 
 
Data Array, Block Light, and Sky Light are given for each block with increasing x coordinates, within rows of increasing z coordinates, within layers of increasing y coordinates.
 
 
The global palette encodes a block as 13 bits. It uses the {{Minecraft Wiki|Data values#Block IDs|block ID}} for the first 9 bits, and the block damage value for the last 4 bits. For example, diorite (block ID <code>1</code> for <code>minecraft:stone</code> with damage <code>3</code>) would be encoded as <code>000000001 0011</code>.
 
 
=== Entity Metadata ===
 
 
Format is now an array of entries, each of which looks like the following:
 
 
{| class="wikitable"
 
! Name
 
! Type
 
! Meaning
 
|-
 
| Index
 
| Unsigned Byte
 
| Unique index key determining the meaning of the following value, see the table below. If this is <code>0xff</code> then the it is the end of the Entity Metadata array and no more is read.
 
|-
 
| Type
 
| Optional Byte Enum
 
| Only if Index is not <code>0xff</code>; the type of the index, see the table below
 
|-
 
| Value
 
| Optional ''value of Type''
 
| Only if Index is not <code>0xff</code>: the value of the metadata field
 
|}
 
 
{| class="wikitable"
 
! Value of Type field
 
! Type of Value field
 
! Notes
 
|-
 
| 0
 
| Byte
 
|
 
|-
 
| 1
 
| VarInt
 
|
 
|-
 
| 2
 
| Float
 
|
 
|-
 
| 3
 
| String
 
|
 
|-
 
| 4
 
| [[Chat]]
 
|
 
|-
 
| 5
 
| [[Slot]]
 
|
 
|-
 
| 6
 
| Boolean
 
|
 
|-
 
| 7
 
| Vector3F (Array of Float)
 
| 3 elements
 
|-
 
| 8
 
| [[Data Types#Position|Position]]
 
|
 
|-
 
| 9
 
| OptPosition (Boolean + Optional Position)
 
| Position is present if the Boolean is set to true
 
|-
 
| 10
 
| Direction (VarInt)
 
| ???
 
|-
 
| 11
 
| OptUUID (Boolean + Optional UUID)
 
| UUID is present if the Boolean is set to true
 
|-
 
| 12
 
| BlockID (VarInt)
 
| <code><nowiki>id &lt;&lt; 4 | data</nowiki></code>
 
|}
 
 
{| class="wikitable"
 
! Entity class
 
! Index
 
! Type
 
! Meaning
 
|-
 
|rowspan="5"| Entity
 
| 0
 
| Byte
 
| Status bit mask, added 0x40 - glowing effect.
 
|-
 
| 1
 
| VarInt
 
| Air
 
|-
 
| 2
 
| String
 
| Custom Name
 
|-
 
| 3
 
| Boolean
 
| Is Custom Name Visible
 
|-
 
| 4
 
| Boolean
 
| Is Silent
 
|-
 
|rowspan="4"| AreaEffectCloud <sup>extends Entity</sup>
 
| 5
 
| Float
 
| Radius
 
|-
 
| 6
 
| VarInt
 
| Color (only for mob spell particle)
 
|-
 
| 7
 
| Boolean
 
| ''Unknown'' (seems that true value ignore radius and show effect as single point, not area)
 
|-
 
| 8
 
| VarInt
 
| Particle ID
 
|-
 
| Arrow <sup>extends Entity</sup>
 
| 5
 
| Byte
 
| Is Critical
 
|-
 
| TippedArrow <sup>extends Arrow</sup>
 
| 6
 
| VarInt
 
| Color
 
|-
 
|rowspan="4"| Boat <sup>extends Entity</sup>
 
| 5
 
| VarInt
 
| Time Since Last Hit
 
|-
 
| 6
 
| VarInt
 
| Forward Direction
 
|-
 
| 7
 
| Float
 
| Damage Taken
 
|-
 
| 8
 
| VarInt
 
| Type
 
|-
 
|rowspan="2"| EnderCrystal <sup>extends Entity</sup>
 
| 5
 
| OptPosition
 
| Beam Target
 
|-
 
| 6
 
| Boolean
 
| Show Bottom
 
|-
 
| Fireball <sup>extends Entity</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
| WitherSkull <sup>extends Fireball</sup>
 
| 5
 
| Boolean
 
| Invulnerable
 
|-
 
| Fireworks <sup>extends Entity</sup>
 
| 5
 
| [[Slot]]
 
| Firework Info
 
|-
 
| Hanging <sup>extends Entity</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
|rowspan="2"| ItemFrame <sup>extends Hanging</sup>
 
| 5
 
| [[Slot]]
 
| Item
 
|-
 
| 6
 
| VarInt
 
| Rotation
 
|-
 
| Item <sup>extends Entity</sup>
 
| 5
 
| [[Slot]]
 
| Item
 
|-
 
|rowspan="5"| Living <sup>extends Entity</sup>
 
| 5
 
| Byte
 
| ''Unknown (probably indicates which hand is currently used)''
 
|-
 
| 6
 
| Float
 
| Health
 
|-
 
| 7
 
| VarInt
 
| Potion Effect Color
 
|-
 
| 8
 
| Boolean
 
| Is Potion Effect Ambient
 
|-
 
| 9
 
| VarInt
 
| Number of Arrows in Entity
 
|-
 
|rowspan="8"| ArmorStand <sup>extends Living</sup>
 
|-
 
| 10
 
| Byte
 
| Status bit mask
 
|-
 
| 11
 
| Vector3F
 
| Head rotation
 
|-
 
| 12
 
| Vector3F
 
| Body rotation
 
|-
 
| 13
 
| Vector3F
 
| Left arm rotation
 
|-
 
| 14
 
| Vector3F
 
| Right arm rotation
 
|-
 
| 15
 
| Vector3F
 
| Left leg rotation
 
|-
 
| 16
 
| Vector3F
 
| Right leg rotation
 
|-
 
| Insentient <sup>extends Living</sup>
 
| 10
 
| Byte
 
| Status bit mask (NoAI, Left handed)
 
|-
 
| Ambient <sup>extends Insentient</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
| Bat <sup>extends Ambient</sup>
 
| 11
 
| Byte
 
| Is Hanging
 
|-
 
| Creature <sup>extends Insentient</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
| Ageable <sup>extends Creature</sup>
 
| 11
 
| Boolean
 
| Is Baby
 
|-
 
| Animal <sup>extends Ageable</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
|rowspan="5"| Horse <sup>extends Animal</sup>
 
| 12
 
| Byte
 
| Status bit mask
 
|-
 
| 13
 
| VarInt
 
| Type
 
|-
 
| 14
 
| VarInt
 
| Variant
 
|-
 
| 15
 
| OptUUID
 
| Owner's UUID
 
|-
 
| 16
 
| VarInt
 
| Armor
 
|-
 
| Pig <sup>extends Animal</sup>
 
| 12
 
| Boolean
 
| Has Saddle
 
|-
 
| Rabbit <sup>extends Animal</sup>
 
| 12
 
| VarInt
 
| Type
 
|-
 
| Sheep <sup>extends Animal</sup>
 
| 12
 
| Byte
 
| Status bit mask
 
|-
 
|rowspan="2"| TameableAnimal <sup>extends Animal</sup>
 
| 12
 
| Byte
 
| Status bit mask (sitting, tamed)
 
|-
 
| 13
 
| OptUUID
 
| Owner's UUID
 
|-
 
| Ocelot <sup>extends TameableAnimal</sup>
 
| 14
 
| VarInt
 
| Type
 
|-
 
|rowspan="3"| Wolf <sup>extends TameableAnimal</sup>
 
| 14
 
| Float
 
| Damage Taken (used for tail rotation)
 
|-
 
| 15
 
| Boolean
 
| Is Begging
 
|-
 
| 16
 
| VarInt
 
| Collar Color
 
|-
 
| Villager <sup>extends Ageable</sup>
 
| 12
 
| VarInt
 
| ''Unknown''
 
|-
 
| Golem <sup>extends Creature</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
| IronGolem <sup>extends Golem</sup>
 
| 11
 
| Byte
 
| Is Player Created
 
|-
 
|rowspan="3"| Shulker <sup>extends Golem</sup>
 
| 11
 
| Direction
 
| Facing Direction
 
|-
 
| 12
 
| OptPosition
 
| Attachment Position
 
|-
 
| 13
 
| Byte
 
| Shield Height
 
|-
 
| Monster <sup>extends Creature</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
| Blaze <sup>extends Monster</sup>
 
| 11
 
| Byte
 
| Is On Fire
 
|-
 
|rowspan="3"| Creeper <sup>extends Monster</sup>
 
| 11
 
| VarInt
 
| State (-1 = Idle, 1 = Fuse)
 
|-
 
| 12
 
| Boolean
 
| Is Powered
 
|-
 
| 13
 
| Boolean
 
| Is Ignited
 
|-
 
|rowspan="2"| Guardian <sup>extends Monster</sup>
 
| 11
 
| Byte
 
| Status bit mask (elderly, retracting spikes)
 
|-
 
| 12
 
| VarInt
 
| Target EID
 
|-
 
|rowspan="2"| Skeleton <sup>extends Monster</sup>
 
| 11
 
| VarInt
 
| Type
 
|-
 
| 12
 
| Boolean
 
| ''Unknown (something hand related)''
 
|-
 
| Spider <sup>extends Monster</sup>
 
| 11
 
| Byte
 
| Is Climbing
 
|-
 
| Witch <sup>extends Monster</sup>
 
| 11
 
| Boolean
 
| Is Aggresive
 
|-
 
|rowspan="4"| Wither <sup>extends Monster</sup>
 
| 11
 
| VarInt
 
| First Head's Target
 
|-
 
| 12
 
| VarInt
 
| Second Head's Target
 
|-
 
| 13
 
| VarInt
 
| Third Head's Target
 
|-
 
| 14
 
| VarInt
 
| Invulnerable Time
 
|-
 
|rowspan="4"| Zombie <sup>extends Monster</sup>
 
| 11
 
| Boolean
 
| Is Baby
 
|-
 
| 12
 
| VarInt
 
| Is Villager (profession)
 
|-
 
| 13
 
| Boolean
 
| Is Converting
 
|-
 
| 14
 
| Boolean
 
| Are Hands Rised Up
 
|-
 
|rowspan="2"| Enderman <sup>extends Monster</sup>
 
| 11
 
| Block ID
 
| Carried Block
 
|-
 
| 12
 
| Boolean
 
| Is Screaming
 
|-
 
| EnderDragon <sup>extends Insentient</sup>
 
| 11
 
| VarInt
 
| Dragon Phase
 
|-
 
| Flying <sup>extends Insentient</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
| Ghast <sup>extends Flying</sup>
 
| 11
 
| Boolean
 
| Is Attacking
 
|-
 
| Slime <sup>extends Insentient</sup>
 
| 11
 
| VarInt
 
| Size
 
|-
 
|rowspan="6"| Minecart <sup>extends Entity</sup>
 
| 5
 
| VarInt
 
| Shaking Power
 
|-
 
| 6
 
| VarInt
 
| Shaking Direction
 
|-
 
| 7
 
| Float
 
| Shaking Multiplier
 
|-
 
| 8
 
| VarInt
 
| Block ID and Meta
 
|-
 
| 9
 
| VarInt
 
| Block Y Position
 
|-
 
| 10
 
| Boolean
 
| Show Block
 
|-
 
|rowspan="2"| MinecartCommandBlock <sup>extends Minecart</sup>
 
| 11
 
| String
 
| Command
 
|-
 
| 12
 
| [[Chat]]
 
| Last Output
 
|-
 
| MinecartFurnace <sup>extends Minecart</sup>
 
| 11
 
| Boolean
 
| Is Powered
 
|-
 
| TNTPrimed <sup>extends Entity</sup>
 
| 5
 
| VarInt
 
| Fuse Time
 
|}
 
 
Entity classes also recursively use fields from classes they extend.
 
 
== Handshaking ==
 
 
=== Clientbound ===
 
 
No changes so far.
 
 
=== Serverbound ===
 
 
==== Handshake ====
 
 
This causes the server to switch into the target state.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="4"| 0x00
 
|rowspan="4"| Handshaking
 
|rowspan="4"| Server
 
| Protocol Version
 
| VarInt
 
| See [[protocol version numbers]] (currently {{Change|47|94}})
 
|-
 
| Server Address
 
| String
 
| hostname or IP, e.g. localhost or 127.0.0.1<!-- does this support IPv6? -->
 
|-
 
| Server Port
 
| Unsigned Short
 
| default is 25565
 
|-
 
| Next State
 
| VarInt Enum
 
| 1 for [[#Status|status]], 2 for [[#Login|login]]
 
|}
 
 
== Play ==
 
 
=== Clientbound ===
 
 
==== Spawn Object ====
 
 
Sent by the server when a vehicle or other object is created.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="12"| {{Change|0x0E|0x00}}
 
|rowspan="12"| Play
 
|rowspan="12"| Client
 
| Entity ID
 
| VarInt
 
| EID of the object
 
|- style="background-color: #d9ead3;"
 
| Object UUID
 
| UUID
 
|
 
|-
 
| Type
 
| Byte
 
| The type of object (see [[Entities#Objects]])
 
|-
 
| X
 
| Int
 
| X position as a [[Data types#Fixed-point numbers|Fixed-point number]]
 
|-
 
| Y
 
| Int
 
| Y position as a [[Data types#Fixed-point numbers|Fixed-point number]]
 
|-
 
| Z
 
| Int
 
| Z position as a [[Data types#Fixed-point numbers|Fixed-point number]]
 
|-
 
| Pitch
 
| Angle
 
|
 
|-
 
| Yaw
 
| Angle
 
|
 
|-
 
| Data
 
| Int
 
| Meaning dependent on the value of the Type field, see [[Object Data]] for details.
 
|-
 
| Velocity X
 
| {{Change|Optional Short|Short}}
 
| {{Change|Only sent if the Data field is nonzero.}} Same units as [[#Entity Velocity|Entity Velocity]].
 
|-
 
| Velocity Y
 
| {{Change|Optional Short|Short}}
 
| {{Change|Only sent if the Data field is nonzero.}} Same units as [[#Entity Velocity|Entity Velocity]].
 
|-
 
| Velocity Z
 
| {{Change|Optional Short|Short}}
 
| {{Change|Only sent if the Data field is nonzero.}} Same units as [[#Entity Velocity|Entity Velocity]].
 
|}
 
 
==== Spawn Mob ====
 
 
Sent by the server when a mob entity is spawned.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="13"| {{Change|0x0F|0x03}}
 
|rowspan="13"| Play
 
|rowspan="13"| Client
 
| Entity ID
 
| VarInt
 
|
 
|- style="background-color: #d9ead3;"
 
| Entity UUID
 
| UUID
 
|
 
|-
 
| Type
 
| Unsigned Byte
 
| The type of mob. See [[Entities#Mobs]]
 
|-
 
| X
 
| Int
 
| X position as a [[Data types#Fixed-point numbers|Fixed-point number]]
 
|-
 
| Y
 
| Int
 
| Y position as a [[Data types#Fixed-point numbers|Fixed-point number]]
 
|-
 
| Z
 
| Int
 
| Z position as a [[Data types#Fixed-point numbers|Fixed-point number]]
 
|-
 
| Yaw
 
| Angle
 
|
 
|-
 
| Pitch
 
| Angle
 
|
 
|-
 
| Head Pitch
 
| Angle
 
|
 
|-
 
| Velocity X
 
| Short
 
| Same units as [[Protocol#Entity Velocity|Entity Velocity]]
 
|-
 
| Velocity Y
 
| Short
 
| Same units as [[Protocol#Entity Velocity|Entity Velocity]]
 
|-
 
| Velocity Z
 
| Short
 
| Same units as [[Protocol#Entity Velocity|Entity Velocity]]
 
|-
 
| Metadata
 
| [[#Entity Metadata|Entity Metadata]]
 
|
 
|}
 
 
==== Spawn Player ====
 
 
This packet is sent by the server when a player comes into visible range, ''not'' when a player joins.
 
 
This packet must be sent after the [[Protocol#Player List Item|Player List Item]] ([[#Play|Play]], 0x38, clientbound) packet that adds the player data for the client to use when spawning a player. If the Player List Item for the player spawned by this packet is not present when this packet arrives, Notchian clients will not spawn the player entity. The Player List Item packet includes skin/cape data.
 
 
Servers can, however, safely spawn player entities for players not in visible range. The client appears to handle it correctly.
 
 
When in online-mode the UUIDs must be valid and have valid skin blobs, in offline-mode UUID v3 is used.
 
 
For NPCs UUID v2 should be used. Note:
 
 
<+Grum> i will never confirm this as a feature you know that :)
 
 
In an example UUID, <code>xxxxxxxx-xxxx-Yxxx-xxxx-xxxxxxxxxxxx</code>, the UUID version is specified by <code>Y</code>. So, for UUID v3, <code>Y</code> will always be <code>3</code>, and for UUID v2, <code>Y</code> will always be <code>2</code>.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="9"| {{Change|0x0C|0x05}}
 
|rowspan="9"| Play
 
|rowspan="9"| Client
 
| Entity ID
 
| VarInt
 
| Player's EID
 
|-
 
| Player UUID
 
| UUID
 
|
 
|-
 
| X
 
| Int
 
| Player X as a [[Data types#Fixed-point numbers|Fixed-point number]]
 
|-
 
| Y
 
| Int
 
| Player Y as a [[Data types#Fixed-point numbers|Fixed-point number]]
 
|-
 
| Z
 
| Int
 
| Player Z as a [[Data types#Fixed-point numbers|Fixed-point number]]
 
|-
 
| Yaw
 
| Angle
 
|
 
|-
 
| Pitch
 
| Angle
 
|
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Current Item
 
| Short
 
| The item the player is currently holding. Note that this should be 0 for “no item”, unlike -1 used in other packets.
 
|-
 
| Metadata
 
| [[#Entity Metadata|Entity Metadata]]
 
|
 
|}
 
 
==== {{Change||Boss Bar}} ====
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="15"| {{Change|0x49|0x0C}}
 
|rowspan="15"| Play
 
|rowspan="15"| Client
 
|colspan="2"| UUID
 
| UUID
 
| Unique ID for this bar
 
|-
 
|colspan="2"| Action
 
| VarInt Enum
 
| Determines the layout of the remaining packet
 
|-
 
! Action
 
! Field Name
 
!
 
!
 
|-
 
|rowspan="5"| 0: add
 
| Title
 
| [[Chat]]
 
|
 
|-
 
| Health
 
| Float
 
| From 0 to 1. Values greater than 1 do not crash the client, and start [https://i.johni0702.de/nA.png rendering part of a second health bar] at around 1.5.
 
|-
 
| Color
 
| VarInt Enum
 
| Color ID (see below)
 
|-
 
| Division
 
| VarInt Enum
 
| Type of division (see below)
 
|-
 
| Flags
 
| Unsigned Byte
 
| Bit mask: 0x1 should darken sky, 0x2: is dragon bar (used to play end music)
 
|-
 
| 1: remove
 
| ''no fields''
 
| ''no fields''
 
| Removes this boss bar
 
|-
 
| 2: update health
 
| Health
 
| Float
 
| as above
 
|-
 
| 3: update title
 
| Title
 
| [[Chat]]
 
|
 
|-
 
|rowspan="2"| 4: update style
 
| Color
 
| VarInt Enum
 
| as above
 
|-
 
| Dividers
 
| VarInt Enum
 
| as above
 
|-
 
| 5: update flags
 
| Flags
 
| Unsigned Byte
 
| as above
 
|-
 
|}
 
 
{| class="wikitable"
 
! ID
 
! Color
 
|-
 
| 0
 
| Pink
 
|-
 
| 1
 
| Blue
 
|-
 
| 2
 
| Red
 
|-
 
| 3
 
| Green
 
|-
 
| 4
 
| Yellow
 
|-
 
| 5
 
| Purple
 
|-
 
| 6
 
| White
 
|}
 
 
{| class="wikitable"
 
! ID
 
! Type of division
 
|-
 
| 0
 
| No division
 
|-
 
| 1
 
| 6 notches
 
|-
 
| 2
 
| 10 notches
 
|-
 
| 3
 
| 12 notches
 
|-
 
| 4
 
| 20 notches
 
|}
 
 
==== {{Change||Set Cooldown}} ====
 
 
Applies a cooldown period to an item type.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| {{Change|0x4A|0x17}}
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Item ID
 
| VarInt
 
| ID of the item to apply a cooldown to.
 
|-
 
| Cooldown Ticks
 
| VarInt
 
| Number of ticks to apply a cooldown for.
 
|}
 
 
==== Entity Status ====
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| {{Change|0x1A|0x1B}}
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Entity ID
 
| Int
 
|
 
|-
 
| Entity Status
 
| Byte Enum
 
| See below
 
|}
 
 
{| class="wikitable"
 
|-
 
! Entity Status
 
! Meaning
 
|-
 
| 1
 
| Sent when resetting a mob spawn minecart's timer — appears to be unused by the client
 
|-
 
| 2
 
| Living Entity hurt
 
|-
 
| 3
 
| Living Entity dead
 
|-
 
| 4
 
| Iron Golem throwing up arms
 
|-
 
| 6
 
| Wolf/Ocelot/Horse taming — Spawn “heart” particles
 
|-
 
| 7
 
| Wolf/Ocelot/Horse tamed — Spawn “smoke” particles
 
|-
 
| 8
 
| Wolf shaking water — Trigger the shaking animation
 
|-
 
| 9
 
| (of self) Eating accepted by server
 
|-
 
| 10
 
| Sheep eating grass
 
|-
 
| 10
 
| Play TNT ignite sound
 
|-
 
| 11
 
| Iron Golem handing over a rose
 
|-
 
| 12
 
| Villager mating — Spawn “heart” particles
 
|-
 
| 13
 
| Spawn particles indicating that a villager is angry and seeking revenge
 
|-
 
| 14
 
| Spawn happy particles near a villager
 
|-
 
| 15
 
| Witch animation — Spawn “magic” particles
 
|-
 
| 16
 
| Play zombie converting into a villager sound
 
|-
 
| 17
 
| Firework exploding
 
|-
 
| 18
 
| Animal in love (ready to mate) — Spawn “heart” particles
 
|-
 
| 19
 
| Reset squid rotation
 
|-
 
| 20
 
| Spawn explosion particle — works for some living entities
 
|-
 
| 21
 
| Play guardian sound — works for every entity
 
|-
 
| 22
 
| Enables reduced {{Minecraft Wiki|Debug screen|debug}} for players
 
|-
 
| 23
 
| Disables reduced {{Minecraft Wiki|Debug screen|debug}} for players
 
|- style="background-color: #d9ead3;"
 
| 24–28
 
| Sets {{Minecraft Wiki|Server.properties#op-permission-level|op permission level}} 0–4 for players
 
|}
 
 
==== {{Change||Unload Chunk}} ====
 
 
Tells the client to unload a chunk.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| 0x1D
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Chunk X
 
| Int
 
| Chunk X coordinate
 
|-
 
| Chunk Z
 
| Int
 
| Chunk Z coordinate
 
|}
 
 
==== Chunk Data ====
 
 
Chunk pillars are not unloaded by the client automatically. To unload chunk pillars, {{Change|send this packet with Ground-Up Continuous{{=}}true and no 16^3 chunks (eg. Primary Bit Mask{{=}}0)|send an [[#Unload Chunk|Unload Chunk]] packet with the chunk's X and Z coordinates}}. 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.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="7"| {{Change|0x21|0x20}}
 
|rowspan="7"| Play
 
|rowspan="7"| Client
 
| Chunk X
 
| Int
 
| Chunk X coordinate
 
|-
 
| Chunk Z
 
| Int
 
| Chunk Z coordinate
 
|-
 
| Ground-Up Continuous
 
| Boolean
 
| This is true if the packet represents all chunk sections in this vertical chunk column, where the Primary Bit Mask specifies exactly which chunk sections are included, and which are air.
 
|-
 
| Primary Bit Mask
 
| {{Change|Unsigned Short|VarInt}}
 
| Bitmask with bits set to 1 for every 16×16×16 chunk section whose data follows in the compressed 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, plus size of Biomes in bytes if present
 
|-
 
| Data
 
| Array of [[#Chunk Section|Chunk Section]]
 
| The length of the array is equal to the number of bits set in Primary Bit Mask.
 
|-
 
| Biomes
 
| Optional Byte Array
 
| Only if Ground-Up Continuous: biome array, byte per XZ coordinate, 256 bytes total.
 
|}
 
 
==== Map ====
 
 
Updates a rectangular area on a {{Minecraft Wiki|map}} item.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="13"| {{Change|0x34|0x24}}
 
|rowspan="13"| Play
 
|rowspan="13"| Client
 
|colspan="2"| Item Damage
 
|colspan="2"| VarInt
 
| The damage value (map ID) of the map being modified
 
|-
 
|colspan="2"| Scale
 
|colspan="2"| Byte
 
| From 0 for a fully zoomed-in map (1 block per pixel) to 4 for a fully zoomed-out map (16 blocks per pixel)
 
|- style="background-color: #d9ead3;"
 
|colspan="2" | Tracking Position
 
|colspan="2" | Boolean
 
| Specifies whether the icons are shown
 
|-
 
|colspan="2"| Icon Count
 
|colspan="2"| VarInt
 
| Number of elements in the following array
 
|-
 
|rowspan="3"| Icon
 
| Direction And Type
 
|rowspan="3"| Array
 
| Byte
 
| 0xF0 = Direction, 0x0F = Type
 
|-
 
| X
 
| Byte
 
|
 
|-
 
| Z
 
| Byte
 
|
 
|-
 
|colspan="2"| Columns
 
|colspan="2"| Byte
 
| Number of columns updated
 
|-
 
|colspan="2"| Rows
 
|colspan="2"| Optional Byte
 
| Only if Columns is more than 0; number of rows updated
 
|-
 
|colspan="2"| X
 
|colspan="2"| Optional Byte
 
| Only if Columns is more than 0; x offset of the westernmost column
 
|-
 
|colspan="2"| Z
 
|colspan="2"| Optional Byte
 
| Only if Columns is more than 0; z offset of the northernmost row
 
|-
 
|colspan="2"| Length
 
|colspan="2"| Optional VarInt
 
| Only if Columns is more than 0; length of the following array
 
|-
 
|colspan="2"| Data
 
|colspan="2"| Optional Array of Byte Enum
 
| Only if Columns is more than 0; see {{Minecraft Wiki|Map item format}}
 
|}
 
 
==== {{Change||Vehicle Move}} ====
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
| 0x29
 
| Play
 
| Client
 
|colspan="3"| ''unknown''
 
|}
 
 
==== Combat Event ====
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="8"| {{Change|0x42|0x2C}}
 
|rowspan="8"| Play
 
|rowspan="8"| Client
 
|colspan="2"| Event
 
| VarInt Enum
 
| Determines the layout of the remaining packet
 
|-
 
! Event
 
! Field Name
 
!
 
!
 
|-
 
| 0: enter combat
 
| ''no fields''
 
| ''no fields''
 
|
 
|-
 
|rowspan="2"| 1: end combat
 
| Duration
 
| VarInt
 
|
 
|-
 
| Entity ID
 
| Int
 
|
 
|-
 
|rowspan="3"| 2: entity dead
 
| Player ID
 
| VarInt
 
|
 
|-
 
| Entity ID
 
| Int
 
|
 
|-
 
| Message
 
| {{Change|String|[[Chat]]}}
 
|
 
|}
 
 
==== Player Position And Look ====
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="7"| {{Change|0x08|0x2E}}
 
|rowspan="7"| Play
 
|rowspan="7"| Client
 
| X
 
| Double
 
| Absolute or relative position, depending on Flags
 
|-
 
| Y
 
| Double
 
| Absolute or relative position, depending on Flags
 
|-
 
| Z
 
| Double
 
| Absolute or relative position, depending on Flags
 
|-
 
| Yaw
 
| Float
 
| Absolute or relative rotation on the X Axis, in degrees
 
|-
 
| Pitch
 
| Float
 
| Absolute or relative rotation on the Y Axis, in degrees
 
|-
 
| Flags
 
| Byte
 
| Bit field, see below
 
|- style="background-color: #d9ead3;"
 
| Teleport ID
 
| VarInt
 
| Client should confirm this packet with [[#Teleport Confirm|Teleport Confirm]] containing the same Teleport ID
 
|}
 
 
==== Entity Equipment ====
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| {{Change|0x04|0x3C}}
 
|rowspan="3"| Play
 
|rowspan="3"| Client
 
| Entity ID
 
| VarInt
 
| Entity's EID
 
|-
 
| Slot
 
| {{Change|Short|VarInt}} Enum
 
| Equipment slot. 0: main hand, {{Change||1: off hand}}, {{Change|1–4|2–5}}: armor slot (2: boots, 3: leggings, 4: chestplate, 5: helmet)
 
|-
 
| Item
 
| [[Slot Data|Slot]]
 
|
 
|}
 
 
==== {{Change||Set Passengers}} ====
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| 0x40
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Entity ID
 
| VarInt
 
| Vehicle's EID
 
|-
 
| Passengers
 
| Array of VarInt
 
| EIDs of entity's passengers
 
|}
 
 
==== Teams ====
 
 
Creates and updates teams.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="11"| {{Change|0x3E|0x41}}
 
|rowspan="11"| Play
 
|rowspan="11"| Client
 
| Team Name
 
| String
 
| A unique name for the team. (Shared with scoreboard).
 
|-
 
| Mode
 
| Byte Enum
 
| 0: create team, 1: remove team, 2: update team info; 3: add players to team; 4: remove players from team
 
|-
 
| Team Display Name
 
| Optional String
 
| Only if Mode is 0 or 2.
 
|-
 
| Team Prefix
 
| Optional String
 
| Only if Mode is 0 or 2. Displayed before the players' name that are part of this team.
 
|-
 
| Team Suffix
 
| Optional String
 
| Only if Mode is 0 or 2. Displayed after the players' name that are part of this team.
 
|-
 
| Friendly Fire
 
| Optional Byte
 
| Only if Mode is 0 or 2. 0 for off, 1 for on, 3 for seeing friendly invisibles.
 
|-
 
| Name Tag Visibility
 
| Optional String
 
| Only if Mode is 0 or 2. <code>always</code>, <code>hideForOtherTeams</code>, <code>hideForOwnTeam</code>, <code>never</code>.
 
|- style="background-color: #d9ead3;"
 
| Collision Rule
 
| Optional String
 
| Only if Mode is 0 or 2. <code>always</code>, <code>hideForOtherTeams</code> ''(sic)'', <code>hideForOwnTeam</code> ''(sic)'', <code>never</code>
 
|-
 
| Color
 
| Optional Byte
 
| Only if Mode is 0 or 2. Same as [[Chat]] colors.
 
|-
 
| Player Count
 
| Optional VarInt
 
| Only if Mode is 0 or 3 or 4. Number of players in the array.
 
|-
 
| Players
 
| Optional Array of String
 
| Only if Mode is 0 or 3 or 4. Players to be added/remove from the team. Max 40 characters so may be uuid's later.
 
|}
 
 
==== {{Change||Sound Effect}} ====
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="6"| 0x47
 
|rowspan="6"| Play
 
|rowspan="6"| Client
 
| Sound ID
 
| VarInt
 
| ID of hardcoded sound event
 
|-
 
| Effect position X
 
| Int
 
| Effect X multiplied by 8
 
|-
 
| Effect position Y
 
| Int
 
| Effect Y multiplied by 8
 
|-
 
| Effect position Z
 
| Int
 
| Effect Z multiplied by 8
 
|-
 
| Volume
 
| Float
 
| 1.0 is 100%, capped between 0.0 and 1.0 by vanilla client
 
|-
 
| Pitch
 
| Unsigned Byte
 
| Float multiplied by 63.5, capped between 0.5 and 2.0 by vanilla client
 
|}
 
 
==== Entity Properties ====
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="6"| {{Change|0x20|0x4B}}
 
|rowspan="6"| Play
 
|rowspan="6"| Client
 
|colspan="2"| Entity ID
 
|colspan="2"| VarInt
 
|
 
|-
 
|colspan="2"| Number Of Properties
 
|colspan="2"| Int
 
| Number of elements in the following array
 
|-
 
|rowspan="4"| Property
 
| Key
 
|rowspan="4"| Array
 
| String
 
| See below
 
|-
 
| Value
 
| Double
 
| See below
 
|-
 
| Number Of Modifiers
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Modifiers
 
| Array of Modifier Data
 
| See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
 
|}
 
 
Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
 
 
{| class="wikitable"
 
|-
 
! Key
 
! Default
 
! Min
 
! Max
 
! Label
 
|-
 
| generic.maxHealth
 
| 20.0
 
| 0.0
 
| {{Change|Double.MaxValue|1024.0}}
 
| Max Health
 
|-
 
| generic.followRange
 
| 32.0
 
| 0.0
 
| 2048.0
 
| Follow Range
 
|-
 
| generic.knockbackResistance
 
| 0.0
 
| 0.0
 
| 1.0
 
| Knockback Resistance
 
|-
 
| generic.movementSpeed
 
| 0.699999988079071
 
| 0.0
 
| {{Change|Double.MaxValue|1024.0}}
 
| Movement Speed
 
|-
 
| generic.attackDamage
 
| 2.0
 
| 0.0
 
| {{Change|Double.MaxValue|2048.0}}
 
| {{Change||Attack Damage}}
 
|- style="background-color: #d9ead3;"
 
| generic.attackSpeed
 
| 4.0
 
| 0.0
 
| 1024.0
 
| Attack Speed
 
|-
 
| horse.jumpStrength
 
| 0.7
 
| 0.0
 
| 2.0
 
| Jump Strength
 
|-
 
| zombie.spawnReinforcements
 
| 0.0
 
| 0.0
 
| 1.0
 
| Spawn Reinforcements Chance
 
|}
 
 
''Modifier Data'' structure:
 
 
{| class="wikitable"
 
|-
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
| UUID
 
| UUID
 
|
 
|-
 
| Amount
 
| Double
 
|
 
|-
 
| Operation
 
| Byte
 
|
 
|}
 
 
==== {{Change|Map Chunk Bulk|}} ====
 
 
Replaced by multiple [[#Chunk Data|Chunk Data]] packets.
 
 
==== {{Change|Update Entity NBT|}} ====
 
 
Wasn't used for anything.
 
 
=== Serverbound ===
 
 
==== {{Change||Teleport Confirm}} ====
 
 
Sent by client as confirmation of [[#Player Position And Look|Player Position And Look]] packet.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| 0x00
 
|rowspan="1"| Play
 
|rowspan="1"| Server
 
| Teleport ID
 
| VarInt
 
|
 
|}
 
 
==== Use Entity ====
 
 
This packet is sent from the client to the server when the client attacks or right-clicks another entity (a player, minecart, etc).
 
 
A Notchian server only accepts this packet if the entity being attacked/used is visible without obstruction and within a 4-unit radius of the player's position.
 
 
Note that middle-click in creative mode is interpreted by the client and sent as a [[#Creative Inventory Action|Creative Inventory Action]] packet instead.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="6"| {{Change|0x02|0x0A}}
 
|rowspan="6"| Play
 
|rowspan="6"| Server
 
| Target
 
| VarInt
 
|
 
|-
 
| Type
 
| VarInt Enum
 
| 0: interact, 1: attack, 2: interact at
 
|-
 
| Target X
 
| Optional Float
 
| Only if Type is interact at
 
|-
 
| Target Y
 
| Optional Float
 
| Only if Type is interact at
 
|-
 
| Target Z
 
| Optional Float
 
| Only if Type is interact at
 
|- style="background-color: #d9ead3;"
 
| Hand
 
| Optional VarInt Enum
 
| Only if Type is interact or interact at; 0: main hand, 1: off hand
 
|}
 
 
==== Player Digging ====
 
 
Sent when the player mines a block. A Notchian server only accepts digging packets with coordinates within a 6-unit radius of the player's position.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| {{Change|0x07|0x13}}
 
|rowspan="3"| Play
 
|rowspan="3"| Server
 
| Status
 
| Byte Enum
 
| The action the player is taking against the block (see below)
 
|-
 
| Location
 
| Position
 
| Block position
 
|-
 
| Face
 
| Byte Enum
 
| The face being hit (see below)
 
|}
 
 
Status can be one of seven values:
 
 
{| class="wikitable"
 
! Value
 
! Meaning
 
! Notes
 
|-
 
| 0
 
| Started digging
 
|
 
|-
 
| 1
 
| Cancelled digging
 
| Sent when the player lets go of the Mine Block key (default: left click)
 
|-
 
| 2
 
| Finished digging
 
| Sent when the client thinks it is finished
 
|-
 
| 3
 
| Drop item stack
 
| Triggered by using the Drop Item key (default: Q) with the modifier to drop the entire selected stack (default: depends on OS). Location is always set to 0/0/0, Face is always set to -Y.
 
|-
 
| 4
 
| Drop item
 
| Triggered by using the Drop Item key (default: Q). Location is always set to 0/0/0, Face is always set to -Y.
 
|-
 
| 5
 
| Shoot arrow / finish eating
 
| Location is always set to 0/0/0, Face is always set to Special.
 
|- style="background-color: #d9ead3;"
 
| 6
 
| Swap item in hand
 
| Used to swap or assign an item to the second hand. Location is always set to 0/0/0, Face is always set to -Y.
 
|}
 
 
The Face field can be one of the following values, representing the face being hit (or the Special value used for “shoot arrow / finish eating”):
 
 
{| class="wikitable"
 
|-
 
! Value
 
! Offset
 
! Face
 
|-
 
| 0
 
| -Y
 
| Bottom
 
|-
 
| 1
 
| +Y
 
| Top
 
|-
 
| 2
 
| -Z
 
| North
 
|-
 
| 3
 
| +Z
 
| South
 
|-
 
| 4
 
| -X
 
| West
 
|-
 
| 5
 
| +X
 
| East
 
|-
 
| 255
 
| —
 
| Special
 
|}
 
 
==== {{Change||Use Item}} ====
 
 
Sent when pressing the Use Item key (default: right click) with an item in hand.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| 0x1D
 
|rowspan="1"| Play
 
|rowspan="1"| Server
 
| Hand
 
| VarInt Enum
 
| Hand used for the animation
 
|}
 
 
==== Player Block Placement ====
 
 
{| class="wikitable"
 
|-
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="7"| {{Change|0x08|0x1C}}
 
|rowspan="7"| Play
 
|rowspan="7"| Server
 
| Location
 
| Position
 
| Block position
 
|-
 
| Face
 
| {{Change|Byte|VarInt}} Enum
 
| The face on which the block is placed (as documented at [[#Player Digging|Player Digging]])
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Held Item
 
| [[Slot Data|Slot]]
 
|
 
|- style="background-color: #d9ead3;"
 
| Hand
 
| VarInt Enum
 
| The hand from which the block is placed; 0: main hand, 1: off hand
 
|-
 
| Cursor Position X
 
| Unsigned Byte
 
| The position of the crosshair on the block, from 0 to 15 increasing from west to east
 
|-
 
| Cursor Position Y
 
| Unsigned Byte
 
| The position of the crosshair on the block, from 0 to 15 increasing from bottom to top
 
|-
 
| Cursor Position Z
 
| Unsigned Byte
 
| The position of the crosshair on the block, from 0 to 15 increasing from north to south
 
|}
 
 
In normal operation (i.e. placing a block), this packet is sent once, with the values set normally.
 
 
The Cursor Position X/Y/Z fields (also known as in-block coordinates) are calculated using raytracing. The unit corresponds to one pixel in the default resource pack. For example, let's say a slab is being placed against the south face of a full block. The Cursor Position X will be higher if the player was pointing near the right (east) edge of the face, lower if pointing near the left. The Cursor Position Y will be used to determine whether it will appear as a bottom slab (values 0–7) or as a top slab (values 8–15). The Cursor Position Z should be 15 since the player was looking at the southernmost part of the block.
 
 
This packet has a special case where X, Y, Z, and Direction are all -1. (Note that Y is unsigned so set to 255.) This special packet indicates that the currently held item for the player should have its state updated such as eating food, pulling back bows, using buckets, etc.
 
 
Special note on using buckets: When using buckets, the Notchian client might send two packets: first a normal and then a special case. The first normal packet is sent when you're looking at a block (e.g. the water you want to scoop up). This normal packet does not appear to do anything with a Notchian server. The second, special case packet appears to perform the action — based on current position/orientation and with a distance check — it appears that buckets can only be used within a radius of 6 units.
 
 
==== Animation ====
 
 
Sent when the player's arm swings.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| {{Change|0x0A|0x1A}}
 
|rowspan="1"| Play
 
|rowspan="1"| Server
 
|style="background-color: #d9ead3;"| Hand
 
|style="background-color: #d9ead3;"| VarInt Enum
 
|style="background-color: #d9ead3;"| Hand used for the animation
 
|}
 
 
==== Entity Action ====
 
 
Sent at least when crouching, leaving a bed, or sprinting. To send action animation to client use 0x28. The client will send this with Action ID = 3 when “Leave Bed” is clicked.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| {{Change|0x0B|0x14}}
 
|rowspan="3"| Play
 
|rowspan="3"| Server
 
| Entity ID
 
| VarInt
 
| Player ID
 
|-
 
| Action ID
 
| VarInt Enum
 
| The ID of the action, see below
 
|-
 
| Jump Boost
 
| VarInt
 
| Horse jump boost. Ranged from 0 to 100.
 
|}
 
 
Action ID can be one of the following values:
 
 
{| class="wikitable"
 
! ID
 
! Action
 
|-
 
| 0
 
| Crouch
 
|-
 
| 1
 
| Uncrouch
 
|-
 
| 2
 
| Leave bed
 
|-
 
| 3
 
| Start sprinting
 
|-
 
| 4
 
| Stop sprinting
 
|-
 
| 5
 
| Jump with horse
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| 6
 
| Open inventory
 
|}
 
 
“Open inventory” is now sent via the [[#Client Status|Client Status]] packet.
 
 
==== Update Sign ====
 
 
This message is sent from the client to the server when the “Done” button is pushed after placing a sign.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="5"| {{Change|0x12|0x19}}
 
|rowspan="5"| Play
 
|rowspan="5"| Server
 
| Location
 
| Position
 
| Block Coordinates
 
|-
 
| Line 1
 
| {{Change|[[Chat]]|String}}
 
| First line of text in the sign
 
|-
 
| Line 2
 
| {{Change|[[Chat]]|String}}
 
| Second line of text in the sign
 
|-
 
| Line 3
 
| {{Change|[[Chat]]|String}}
 
| Third line of text in the sign
 
|-
 
| Line 4
 
| {{Change|[[Chat]]|String}}
 
| Fourth line of text in the sign
 
|}
 
 
==== Client Settings ====
 
 
Sent when the player connects, or when settings are changed.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="6"| {{Change|0x15|0x04}}
 
|rowspan="6"| Play
 
|rowspan="6"| Server
 
| Locale
 
| String
 
| e.g. en_GB
 
|-
 
| View Distance
 
| Byte
 
| Client-side render distance, in chunks
 
|-
 
| Chat Mode
 
| {{Change|Byte|VarInt}} Enum
 
| 0: enabled, 1: commands only, 2: hidden
 
|-
 
| Chat Colors
 
| Boolean
 
| “Colors” multiplayer setting
 
|-
 
| Displayed Skin Parts
 
| Unsigned Byte
 
| Skin parts, see note below
 
|- style="background-color: #d9ead3;"
 
| Main Hand
 
| VarInt Enum
 
| 0: Left, 1: Right
 
|}
 
 
''Displayed Skin Parts'' flags:
 
 
* Bit 0 (0x01): Cape enabled
 
* Bit 1 (0x02): Jacket enabled
 
* Bit 2 (0x04): Left Sleeve enabled
 
* Bit 3 (0x08): Right Sleeve enabled
 
* Bit 4 (0x10): Left Pants Leg enabled
 
* Bit 5 (0x20): Right Pants Leg enabled
 
* Bit 6 (0x40): Hat enabled
 
 
The most significant bit (bit 7, 0x80) appears to be unused.
 
 
==== Client Status ====
 
 
Sent when the client is ready to complete login and when the client is ready to respawn after death.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| {{Change|0x16|0x03}}
 
|rowspan="1"| Play
 
|rowspan="1"| Server
 
| Action ID
 
| VarInt Enum
 
| See below
 
|}
 
 
''Action ID'' values:
 
 
{| class="wikitable"
 
|-
 
! Action ID
 
! Action
 
|-
 
| 0
 
| Perform respawn
 
|-
 
| 1
 
| Request stats
 
|-
 
| 2
 
| {{Change|''Taking Inventory'' achievement|Open Inventory}}
 
|}
 
 
== Status ==
 
 
=== Clientbound ===
 
  
 
No changes so far.
 
No changes so far.
  
=== Serverbound ===
+
[[Category:Minecraft Modern]]
 
 
No changes so far.
 
 
 
== Login ==
 
 
 
=== Clientbound ===
 
 
 
No changes so far.
 
 
 
=== Serverbound ===
 
 
 
No changes so far.
 

Latest revision as of 16:42, 29 June 2024

There are currently no pre-release versions available to document on this page. For the latest stable Minecraft release, see the Protocol page. For previous pre-release pages, see the Protocol version numbers page.

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

No changes so far.