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|1.10.2, protocol 210]]) to the current pre-release (currently [[Protocol version numbers|16w35a, protocol 304]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
+
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.17.1, protocol 756]]) to the current pre-release (currently [[Protocol version numbers|1.18 experimental snapshot 2, protocol {{Snapshot PVN|1073741866}}]]). 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.
 
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.
Line 14: Line 14:
  
 
No changes so far.
 
No changes so far.
 
{| class="wikitable"
 
! ID
 
! Packet name
 
!colspan="2"| Documentation
 
|-
 
!colspan="4"| Handshaking serverbound
 
{{PacketList|0x00|Handshake}}
 
|-
 
!colspan="4"| Play clientbound
 
  {{PacketList|0x03|Spawn Mob}}
 
  {{PacketList|0x48|Collect Item}}
 
|-
 
|}
 
  
 
== New/modified data types ==
 
== New/modified data types ==
  
=== Mobs ===
+
No changes so far.
  
Mobs are spawned via [[Protocol#Spawn_Mob|Spawn Mob]]. There are two extra mob types in the code that refer to mobs classes that can never spawn: Mob and Monster (they are always subclasses, aka another more specific type).
+
== Entity Metadata ==
  
{| class="wikitable"
+
No changes so far.
|-
 
! Type
 
! Name
 
! x, z
 
! y
 
! ID
 
|- style="background-color: #d9ead3;"
 
| 4
 
| ElderGuardian
 
| 0.85
 
| 0.85
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:elder_guardian</code>
 
|- style="background-color: #d9ead3;"
 
| 5
 
| WitherSkeleton
 
| 0.7
 
| 2.4
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:wither_skeleton</code>
 
|- style="background-color: #d9ead3;"
 
| 6
 
| Stray
 
| 0.6
 
| 1.99
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:stray</code>
 
|- style="background-color: #d9ead3;"
 
| 23
 
| Husk
 
| 0.6
 
| 1.95
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:husk</code>
 
|- style="background-color: #d9ead3;"
 
| 27
 
| ZombieVillager
 
| 0.6
 
| 1.95
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:zombie_villager</code>
 
|- style="background-color: #d9ead3;"
 
| 28
 
| SkeletonHorse
 
| 1.396484
 
| 1.6
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:skeleton_horse</code>
 
|- style="background-color: #d9ead3;"
 
| 29
 
| ZombieHorse
 
| 1.396484
 
| 1.6
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:zombie_horse</code>
 
|- style="background-color: #d9ead3;"
 
| 31
 
| Donkey
 
| 1.396484
 
| 1.6
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:donkey</code>
 
|- style="background-color: #d9ead3;"
 
| 32
 
| Mule
 
| 1.396484
 
| 1.6
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:mule</code>
 
|-
 
| 48
 
| Mob
 
| N/A
 
| N/A
 
|-
 
| 49
 
| Monster
 
| N/A
 
| N/A
 
|-
 
| 50
 
| Creeper
 
| 0.6
 
| 1.7
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:creeper</code>
 
|-
 
| 51
 
| Skeleton
 
| 0.6
 
| 1.99
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:skeleton</code>
 
|-
 
| 52
 
| Spider
 
| 1.4
 
| 0.9
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:spider</code>
 
|-
 
| 53
 
| {{change|Giant Zombie|Giant}}
 
| 0.6 * 6
 
| 1.8 * 6
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:giant</code>
 
|-
 
| 54
 
| Zombie
 
| 0.6
 
| 1.8
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:zombie</code>
 
|-
 
| 55
 
| Slime
 
| 0.51000005 * size
 
| 0.51000005 * size
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:slime</code>
 
|-
 
| 56
 
| Ghast
 
| 4
 
| 4
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:ghast</code>
 
|-
 
| 57
 
| {{change|Zombie Pigman|PigZombie}}
 
| 0.6
 
| 1.8
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:zombie_pigman</code>
 
|-
 
| 58
 
| Enderman
 
| 0.6
 
| 2.9
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:enderman</code>
 
|-
 
| 59
 
| {{change|Cave Spider|CaveSpider}}
 
| 0.7
 
| 0.5
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:cave_spider</code>
 
|-
 
| 60
 
| Silverfish
 
| 0.4
 
| 0.3
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:silverfish</code>
 
|-
 
| 61
 
| Blaze
 
| 0.6
 
| 1.8
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:blaze</code>
 
|-
 
| 62
 
| {{change|Magma Cube|LavaSlime}}
 
| 0.51000005 * size
 
| 0.51000005 * size
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:magma_cube</code>
 
|-
 
| 63
 
| {{change|Ender Dragon|EnderDragon}}
 
| 16.0
 
| 8.0
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:ender_dragon</code>
 
|-
 
| 64
 
| {{change|Wither|WitherBoss}}
 
| 0.9
 
| 3.5
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:wither</code>
 
|-
 
| 65
 
| Bat
 
| 0.5
 
| 0.9
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:bat</code>
 
|-
 
| 66
 
| Witch
 
| 0.6
 
| 1.8
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:witch</code>
 
|-
 
| 67
 
| Endermite
 
| 0.4
 
| 0.3
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:endermite</code>
 
|-
 
| 68
 
| Guardian
 
| 0.85
 
| 0.85
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:guardian</code>
 
|-
 
| 69
 
| Shulker
 
| 1
 
| 1
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:shulker</code>
 
|-
 
| 90
 
| Pig
 
| 0.9
 
| 0.9
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:pig</code>
 
|-
 
| 91
 
| Sheep
 
| 0.9
 
| 1.3
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:sheep</code>
 
|-
 
| 92
 
| Cow
 
| 0.9
 
| 1.4
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:cow</code>
 
|-
 
| 93
 
| Chicken
 
| 0.4
 
| 0.7
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:chicken</code>
 
|-
 
| 94
 
| Squid
 
| 0.8
 
| 0.8
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:squid</code>
 
|-
 
| 95
 
| Wolf
 
| 0.6
 
| 0.85
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:wolf</code>
 
|-
 
| 96
 
| {{change|Mooshroom|MushroomCow}}
 
| 0.9
 
| 1.3
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:mooshroom</code>
 
|-
 
| 97
 
| {{change|Snowman|SnowMan}}
 
| 0.7
 
| 1.9
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:snowman</code>
 
|-
 
| 98
 
| {{change|Ocelot|Ozelot}}
 
| 0.6
 
| 0.8
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:ocelot</code>
 
|-
 
| 99
 
| {{change|Iron Golem|VillagerGolem}}
 
| 1.4
 
| 2.7
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:villager_golem</code>
 
|-
 
| 100
 
| {{change|EntityHorse|Horse}}
 
| 1.396484
 
| 1.6
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:horse</code>
 
|-
 
| 101
 
| Rabbit
 
| 0.4
 
| 0.5
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:rabbit</code>
 
|-
 
| 102
 
| {{change|Polar Bear|PolarBear}}
 
| 1.3
 
| 1.4
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:polar_bear</code>
 
|-
 
| 120
 
| Villager
 
| 0.6
 
| 1.95
 
| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:villager</code>
 
|}
 
  
=== Entity Metadata ===
+
=== Entity ===
  
=== AbstractSkeleton ===
+
No changes so far.
  
Extends [[#Monster|Monster]].
+
== Block Actions ==
  
{| class="wikitable" style="background-color: #d9ead3;"
+
No changes so far.
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
|-
 
| 12
 
| Boolean
 
|colspan="2"| Is swinging arms
 
|}
 
  
=== Skeleton ===
+
== Inventories ==
  
Extends [[#AbstractSkeleton|AbstractSkeleton]].
+
No changes so far.
 
 
{| class="wikitable" style="background-color: #f4cccc;"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
|-
 
| 12
 
| VarInt
 
|colspan="2"| Type (Normal = 0, Wither = 1, Stray = 2)
 
|-
 
| 13
 
| Boolean
 
|colspan="2"| Is swinging arms (Used to animate arms for melee attacks; only used when the skeleton does not have a bow in its hand)
 
|}
 
 
 
=== Wither Skeleton ===
 
 
 
Extends [[#AbstractSkeleton|AbstractSkeleton]].
 
 
 
=== Stray ===
 
 
 
Extends [[#AbstractSkeleton|AbstractSkeleton]].
 
 
 
=== Zombie ===
 
 
 
Extends [[#Monster|Monster]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
|-
 
| 12
 
| Boolean
 
|colspan="2"| Is baby
 
|-
 
| 13
 
| VarInt
 
|colspan="2"| {{change|Zombie type (0 for zombie, profession+1 for villagers, 6 for Husk)|Unused}}
 
|- style="background-color: #f4cccc;"
 
| 14
 
| Boolean
 
|colspan="2"| Is converting
 
|-
 
| {{change|15|14}}
 
| Boolean
 
|colspan="2"| Are hands held up
 
|}
 
 
 
=== Zombie Villager ===
 
 
 
Extends [[#Zombie|Zombie]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
|- style="background-color: #d9ead3;"
 
| 15
 
| Boolean
 
|colspan="2"| Is converting
 
|- style="background-color: #d9ead3;"
 
| 16
 
| VarInt
 
|colspan="2"| Profession
 
|}
 
 
 
=== Husk ===
 
 
 
Extends [[#Zombie|Zombie]].
 
 
 
=== Guardian ===
 
 
 
Extends [[#Monster|Monster]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
|- style="background-color: #f4cccc;"
 
|rowspan="3"| 12
 
|rowspan="3"| Byte
 
! Bit mask
 
! Meaning
 
|- style="background-color: #f4cccc;"
 
| 0x02
 
| is retracting spikes
 
|- style="background-color: #f4cccc;"
 
| 0x04
 
| is elderly
 
|- style="background-color: #d9ead3;"
 
| 12
 
| Boolean
 
|colspan="2"| Is retracting spikes
 
|-
 
| 13
 
| VarInt
 
|colspan="2"| Target EID
 
|}
 
 
 
=== ElderGuardian ===
 
 
 
Extends [[#Guardian|Guardian]].
 
 
 
=== AbstractHorse ===
 
 
 
Extends [[#Animal|Animal]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
|-
 
|rowspan="9"| 13
 
|rowspan="9"| Byte
 
! Bit mask
 
! Meaning
 
|-
 
| 0x01
 
| ''Unused''
 
|-
 
| 0x02
 
| Is Tame
 
|-
 
| 0x04
 
| Is saddled
 
|-
 
| 0x08
 
| Has Chest
 
|-
 
| 0x10
 
| Is Bred (not used on the Notchian server; controlled via the unused Bred NBT flag)
 
|-
 
| 0x20
 
| Is eating
 
|-
 
| 0x40
 
| Is rearing (on hind legs)
 
|-
 
| 0x80
 
| Is mouth open
 
|-
 
| 14
 
| OptUUID
 
|colspan="2"| Owner
 
|}
 
 
 
=== Horse ===
 
 
 
Extends [[#AbstractHorse|AbstractHorse]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
|-
 
| 15
 
| VarInt
 
|colspan="2"| Variant (Color & Style)
 
|-
 
| 16
 
| VarInt
 
|colspan="2"| Armor
 
|}
 
 
 
=== ZombieHorse ===
 
 
 
Extends [[#AbstractHorse|AbstractHorse]].
 
 
 
=== SkeletonHorse ===
 
 
 
Extends [[#AbstractHorse|AbstractHorse]].
 
 
 
=== ChestedHorse ===
 
 
 
Extends [[#AbstractHorse|AbstractHorse]].
 
 
 
{| class="wikitable" style="background-color: #d9ead3;"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
|-
 
| 15
 
| Boolean
 
|colspan="2"| Has Chest
 
|}
 
 
 
=== Donkey ===
 
 
 
Extends [[#ChestedHorse|ChestedHorse]].
 
 
 
=== Mule ===
 
 
 
Extends [[#ChestedHorse|ChestedHorse]].
 
 
 
== Handshaking ==
 
  
=== Clientbound ===
+
== Plugin Channels ==
  
 
No changes so far.
 
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|210|304}})
 
|-
 
| 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|status]], 2 for [[#Login|login]]
 
|}
 
  
 
== Play ==
 
== Play ==
Line 570: Line 43:
 
=== Clientbound ===
 
=== Clientbound ===
  
==== Spawn Mob ====
+
No changes so far.
 
 
Sent by the server when a mob entity is spawned.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="13"| 0x03
 
|rowspan="13"| Play
 
|rowspan="13"| Client
 
| Entity ID
 
| VarInt
 
|
 
|-
 
| Entity UUID
 
| UUID
 
|
 
|-
 
| Type
 
| {{change|Unsigned Byte|VarInt}}
 
| The type of mob. See [[Entities#Mobs]]
 
|-
 
| X
 
| Double
 
|
 
|-
 
| Y
 
| Double
 
|
 
|-
 
| Z
 
| Double
 
|
 
|-
 
| Yaw
 
| Angle
 
|
 
|-
 
| Pitch
 
| Angle
 
|
 
|-
 
| Head Pitch
 
| Angle
 
|
 
|-
 
| Velocity X
 
| Short
 
| Same units as [[#Entity Velocity|Entity Velocity]]
 
|-
 
| Velocity Y
 
| Short
 
| Same units as [[#Entity Velocity|Entity Velocity]]
 
|-
 
| Velocity Z
 
| Short
 
| Same units as [[#Entity Velocity|Entity Velocity]]
 
|-
 
| Metadata
 
| [[Entities#Entity Metadata Format|Entity Metadata]]
 
|
 
|}
 
 
 
==== Collect Item ====
 
 
 
Sent by the server when someone picks up an item lying on the ground — its sole purpose appears to be the animation of the item flying towards you. It doesn't destroy the entity in the client memory, and it doesn't add it to your inventory. The server only checks for items to be picked up after each [[#Player Position|Player Position]] (and [[#Player Position And Look|Player Position And Look]]) packet sent by the client.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| 0x48
 
|rowspan="3"| Play
 
|rowspan="3"| Client
 
| Collected Entity ID
 
| VarInt
 
|
 
|-
 
| Collector Entity ID
 
| VarInt
 
|
 
|-
 
|style="background-color: #d9ead3;"|Pickup Item Count
 
|style="background-color: #d9ead3;"|VarInt
 
|style="background-color: #d9ead3;"|Seems to be 1 for XP orbs, otherwise the number of items in the stack.
 
|}
 
  
 
=== Serverbound ===
 
=== Serverbound ===
Line 689: Line 68:
  
 
No changes so far.
 
No changes so far.
 +
 +
 +
[[Category:Minecraft Modern]]

Latest revision as of 22:32, 7 August 2021

This page documents the changes from the last stable Minecraft release (currently 1.17.1, protocol 756) to the current pre-release (currently 1.18 experimental snapshot 2, protocol Snapshot 42). 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

No changes so far.

New/modified data types

No changes so far.

Entity Metadata

No changes so far.

Entity

No changes so far.

Block Actions

No changes so far.

Inventories

No changes so far.

Plugin Channels

No changes so far.

Play

Clientbound

No changes so far.

Serverbound

No changes so far.

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

No changes so far.

Serverbound

No changes so far.