Difference between revisions of "Pre-release protocol"

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(Updated to 1.21-pre2)
 
Line 1: Line 1:
−
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently 1.6.2, protocol 74) to the current pre-release. 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|1.20.6, protocol 766]]) to the current pre-release (currently [[Protocol version numbers|1.21-pre2, protocol {{Snapshot PVN|1073742024}}]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
−
He 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 occured to the respective packets there.
 
  
−
== Protocol History ==
+
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.
−
13w36a - Added sound category byte to 0x3E
 
−
- Changed 0xC8 to a string:int map
 
  
−
13w37b -
+
== Contents ==
  
−
1.6.3 - Terrain fixes to help moving to 1.7, no packet changes from 1.6.2
+
<div style="float:right;">__TOC__</div>
  
−
1.6.4 -
+
=== Data types ===
  
−
13w38a/b/c -
+
No changes documented so far.
  
−
13w39a/b - UUIDs added to spawn named entity, game state 'gamemode' byte -> float
+
=== Packets ===
−
 
 
−
13w41a - Large protocol work
 
−
 
 
−
== Protocol Version ==
 
−
13w41a -
 
−
 
 
−
13w39a/b - 80
 
−
 
 
−
13w38a/b/c - 79
 
−
 
 
−
1.6.4 - 78
 
−
 
 
−
1.6.3 - 77
 
−
 
 
−
13w37b - 76
 
−
 
 
−
13w36a - 75
 
−
 
 
−
== Packet format ==
 
  
 
{| class="wikitable"
 
{| class="wikitable"
−
! Field Name !! Field Type !! Notes
+
! ID
−
|-
+
! Packet name
−
| Length || VarInt ||
+
!colspan="2"| Documentation
−
|-
+
|-
−
| Type || VarInt ||
+
!colspan="4"| Configuration clientbound
−
|-
+
{{PacketList|0x0F|Clientbound Report Details (configuration)|rel=added}}
−
| Data || ||
+
{{PacketList|0x10|Clientbound Server Links (configuration)|rel=added}}
 +
|-
 +
!colspan="4"| Play clientbound
 +
{{PacketList|0x7A|Clientbound Report Details (play)|rel=added}}
 +
{{PacketList|0x7B|Clientbound Server Links (play)|rel=added}}
 +
|-
 
|}
 
|}
  
−
== Data Types ==
+
== Handshake ==
  
−
VarInt -
+
No changes so far.
  
−
String - UTF-8 String
+
== Status ==
  
−
== Handshaking ==
+
No changes so far.
  
−
=== Serverbound ===
+
== Login ==
  
−
==== ? ====
+
No changes so far.
−
{| class="wikitable"
 
−
! Packet ID !! Field Name !! Field Type !! Notes
 
−
|-
 
−
| rowspan=4 | 0x00
 
−
| || VarInt ||
 
−
|-
 
−
| || String ||
 
−
|-
 
−
| || VarInt ||
 
−
|-
 
−
| || VarInt ||
 
−
|}
 
  
−
== Play ==
+
== Configuration ==
  
 
=== Clientbound ===
 
=== Clientbound ===
  
−
==== Keep Alive ====
+
==== Clientbound Report Details (configuration) ====
−
{| class="wikitable"
 
−
! Packet ID !! Field Name !! Field Type !! Notes
 
−
|-
 
−
| rowspan=1 | 0x00
 
−
| Keep Alive ID || Int ||
 
−
|}
 
  
 +
Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.
  
−
==== Join Game ====
+
{| class="wikitable" {{added}}
−
{| class="wikitable"
+
! Packet ID
−
! Packet ID !! Field Name !! Field Type !! Notes
+
! State
−
|-
+
! Bound To
−
| rowspan=7 | 0x01
+
! colspan="2"| Field Name
−
| Entity ID || Int || The player's Entity ID
+
! colspan="2"| Field Type
−
|-
+
! Notes
−
| Level type || String || level-type in server.properties
+
|-
−
|-
+
| rowspan="3"| 0x0F
−
| Gamemode || Byte || 0: survival, 1: creative, 2: adventure. Bit 3 (0x8) is the hardcore flag
+
| rowspan="3"| Configuration
−
|-
+
| rowspan="3"| Client
−
| Dimension || Byte || -1: nether, 0: overworld, 1: end
+
| colspan="2"| Details Count
−
|-
+
| colspan="2"| {{Type|VarInt}} (32)
−
| Difficulty || Unsigned Byte || 0 thru 3 for Peaceful, Easy, Normal, Hard
+
| The number of details in the following array.
−
|-
+
|-
−
| || Byte ||
+
| rowspan="2"| Details
−
|-
+
| Title
−
| Max Players || Byte || Used by the client to draw the player list
+
| rowspan="2"| {{Type|Array}}
 +
| {{Type|String}} (128)
 +
|
 +
|-
 +
| Description
 +
| {{Type|String}} (4096)
 +
|
 
|}
 
|}
  
−
==== Chat Message ====  
+
==== Clientbound Server Links (configuration) ====
−
{| class="wikitable"
 
−
! Packet ID !! Field Name !! Field Type !! Notes
 
−
|-
 
−
| rowspan=1 | 0x02
 
−
| JSON Data || String || https://gist.github.com/thinkofdeath/e882ce057ed83bac0a1c
 
−
|}
 
  
−
==== Time Update ====
+
This packet contains a list of links that the Notchian client will display in the menu available from the pause menu. Link labels can be built-in or custom (i.e., any text).
−
{| class="wikitable"
 
−
! Packet ID !! Field Name !! Field Type !! Notes
 
−
|-
 
−
| rowspan=2 | 0x03
 
−
| Age of the world || Long || In ticks; not changed by server commands
 
−
|-
 
−
| Time of day || Long || The world (or region) time, in ticks. If negative the sun will stop moving at the Math.abs of the time
 
−
|}
 
−
 
 
−
==== Entity Equipment ====
 
−
{| class="wikitable"
 
−
! Packet ID !! Field Name !! Field Type !! Notes
 
−
|-
 
−
| rowspan=3 | 0x04
 
−
| EntityID || Int || Entity's ID
 
−
|-
 
−
| Slot || Short || Equipment slot: 0=held, 1-4=armor slot (1 - boots, 2 - leggings, 3 - chestplate, 4 - helmet)
 
−
|-
 
−
| Item || [[Slot_Data|Slot]] || Item in slot format
 
−
|}
 
  
−
==== Spawn Position ====
+
{| class="wikitable" {{added}}
−
{| class="wikitable"
+
! Packet ID
−
! Packet ID !! Field Name !! Field Type !! Notes
+
! State
−
|-
+
! Bound To
−
| rowspan=3 | 0x05
+
! colspan="2"| Field Name
−
| X || Int || Spawn X in block coordinates
+
! colspan="2"| Field Type
−
|-
+
! Notes
−
| Y || Int || Spawn Y in block coordinates
+
|-
−
|-
+
| rowspan="4"| 0x10
−
| Z || Int || Spawn | in block coordinates
+
| rowspan="4"| Configuration
 +
| rowspan="4"| Client
 +
| colspan="2"| Links Count
 +
| colspan="2"| {{Type|VarInt}}
 +
| The number of links in the following array.
 +
|-
 +
| rowspan="3"| Links
 +
| Is built-in
 +
| rowspan="3"| {{Type|Array}}
 +
| {{Type|Boolean}}
 +
| Determines if the following label is built-in (from enum) or custom (text component).
 +
|-
 +
| Label
 +
| {{Type|VarInt}} {{Type|Enum}} / {{Type|Text Component}}
 +
| See below.
 +
|-
 +
| URL
 +
| {{Type|String}}
 +
| Valid URL.
 
|}
 
|}
  
−
==== Update Health ====
 
−
{| class="wikitable"
 
−
! Packet ID !! Field Name !! Field Type !! Notes
 
−
|-
 
−
| rowspan=3 | 0x06
 
−
| Health || Float || 0 or less = dead, 20 = full HP
 
−
|-
 
−
| Food || Short || 0 - 20
 
−
|-
 
−
| Food Saturation || Float || Seems to vary from 0.0 to 5.0 in integer increments
 
−
|}
 
  
−
==== Respawn ====
+
{| class="wikitable" {{added}}
−
{| class="wikitable"
+
! ID
−
! Packet ID !! Field Name !! Field Type !! Notes
+
! Name
−
|-
+
! Notes
−
| rowspan=5 | 0x07
+
|-
−
| Dimension || Int || -1: The Nether, 0: The Overworld, 1: The End
+
| 0
−
|-
+
| Bug Report
−
| Difficulty || Byte || 0 thru 3 for Peaceful, Easy, Normal, Hard.
+
| Displayed on connection error screen; included as a comment in the disconnection report.
−
|-
+
|-
−
| Gamemode || Byte || 0: survival, 1: creative, 2: adventure. The hardcore flag is not included
+
| 1
−
|-  
+
| Community Guidelines
−
| World Height|| Short || Defaults to 256
+
|  
−
|-
+
|-
−
| Level Type || String ||  
+
| 2
−
|}
+
| Support
 +
|  
 +
|-
 +
| 3
 +
| Status
 +
|
 +
|-
 +
| 4
 +
| Feedback
 +
|  
 +
|-
 +
| 5
 +
| Community
 +
|  
 +
|-
 +
| 6
 +
| Website
 +
|  
 +
|-
 +
| 7
 +
| Forums
 +
|  
 +
|-
 +
| 8
 +
| News
 +
|  
 +
|-
 +
| 9
 +
| Announcements
 +
|  
 +
|-
 +
|}
  
−
==== Player ====
+
=== Serverbound ===
−
{| class="wikitable"
 
−
! Packet ID !! Field Name !! Field Type !! Notes
 
−
|-
 
−
| rowspan=1 | 0x08
 
−
| On Ground || Bool | True if the client is on the ground, False otherwise
 
−
|}
 
  
−
==== Player Position ====
+
No changes so far.
−
{| class="wikitable"
 
−
! Packet ID !! Field Name !! Field Type !! Notes
 
−
|-
 
−
| rowspan=5| 0x09
 
−
| X || Double || Absolute position
 
−
|-
 
−
| Y || Double || Absolute position
 
−
|-
 
−
| Stance || Double || Used to modify the players bounding box when going up stairs, crouching, etc…
 
−
|-
 
−
| Z || Double || Absolute position
 
−
|-
 
−
| On Ground || Bool || True if the client is on the ground, False otherwise
 
−
|}
 
  
−
==== Player Look ====
+
== Play ==
−
{| class="wikitable"
 
−
! Packet ID !! Field Name !! Field Type !! Notes
 
−
|-
 
−
| rowspan=3| 0x0A
 
−
| Yaw || Float || Absolute rotation on the X Axis, in degrees
 
−
|-
 
−
| Pitch || Float || Absolute rotation on the Y Axis, in degrees
 
−
|-
 
−
| On Ground || Bool || True if the client is on the ground, False otherwise
 
−
|}
 
  
−
==== Player Position And Look ====
+
=== Clientbound ===
−
{| class="wikitable"
 
−
! Packet ID !! Field Name !! Field Type !! Notes
 
−
|-
 
−
| rowspan=7| 0x0B
 
−
| X || Double || Absolute position
 
−
|-
 
−
| Y || Double || Absolute position
 
−
|-
 
−
| Stance || Double || Used to modify the players bounding box when going up stairs, crouching, etc…
 
−
|-
 
−
| Z || Double || Absolute position
 
−
|-
 
−
| Yaw || Float || Absolute rotation on the X Axis, in degrees
 
−
|-
 
−
| Pitch || Float || Absolute rotation on the Y Axis, in degrees
 
−
|-
 
−
| On Ground || Bool || True if the client is on the ground, False otherwise
 
−
|}
 
  
−
==== Held Item Change ====  
+
==== Clientbound Report Details (play) ====
−
{| class="wikitable"
 
−
! Packet ID !! Field Name !! Field Type !! Notes
 
−
|-
 
−
| rowspan=1 | 0x0C
 
−
| Slot || Short || The slot which the player has selected (0-8)
 
−
|}
 
  
−
==== Use Bed ====
+
Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.
−
{| class="wikitable"
 
−
! Packet ID !! Field Name !! Field Type !! Notes
 
−
|-
 
−
| rowspan=5 | 0x0D
 
−
| Entity ID || Int || Player ID
 
−
|-
 
−
| || Byte ||
 
−
|-
 
−
| X || Int || Bed headboard X as block coordinate
 
−
|-
 
−
| Y || Unsigned Byte || Bed headboard Y as block coordinate
 
−
|-
 
−
| Z || Int || Bed headboard Z as block coordinate
 
−
|}
 
  
−
==== Animation ====
+
{| class="wikitable" {{added}}
−
{| class="wikitable"
+
! Packet ID
−
! Packet ID !! Field Name !! Field Type !! Notes
+
! State
−
|-
+
! Bound To
−
| rowspan=2 | 0x0E
+
! colspan="2"| Field Name
−
| Entity ID || Int || Player ID
+
! colspan="2"| Field Type
−
|-
+
! Notes
−
| Animation || Byte || Animation ID
+
|-
 +
| rowspan="3"| 0x7A
 +
| rowspan="3"| Configuration
 +
| rowspan="3"| Client
 +
| colspan="2"| Details Count
 +
| colspan="2"| {{Type|VarInt}} (32)
 +
| The number of details in the following array.
 +
|-
 +
| rowspan="2"| Details
 +
| Title
 +
| rowspan="2"| {{Type|Array}}
 +
| {{Type|String}} (128)
 +
|
 +
|-
 +
| Description
 +
| {{Type|String}} (4096)
 +
|
 
|}
 
|}
  
−
Animation can be one of the following values:
+
==== Clientbound Server Links (play) ====
  
−
{| class="wikitable"
+
This packet contains a list of links that the Notchian client will display in the menu available from the pause menu. Link labels can be built-in or custom (i.e., any text).
−
! ID !! Animation
 
−
|-
 
−
| 0 || No animation
 
−
|-
 
−
| 1 || Swing arm
 
−
|-
 
−
| 2 || Damage animation
 
−
|-
 
−
| 3 || Leave bed
 
−
|-
 
−
| 5 || Eat food
 
−
|-
 
−
| 6 || Critical effect
 
−
|-
 
−
| 7 || Magic critical effect
 
−
|-
 
−
| 102 || (unknown)
 
−
|-
 
−
| 104 || Crouch
 
−
|-
 
−
| 105 || Uncrouch
 
−
|}
 
  
−
==== Spawn Player ====
+
{| class="wikitable" {{added}}
−
{| class="wikitable"
+
! Packet ID
−
! Packet ID !! Field Name !! Field Type !! Notes
+
! State
−
|-
+
! Bound To
−
| rowspan=10 | 0x0F
+
! colspan="2"| Field Name
−
|-
+
! colspan="2"| Field Type
−
| Entity ID || Int || Player's Entity ID
+
! Notes
−
|-
+
|-
−
| Player UUID || String || Player's UUID
+
| rowspan="4"| 0x7B
−
|-
+
| rowspan="4"| Configuration
−
| Player Name || String || Player's Name
+
| rowspan="4"| Client
−
|-
+
| colspan="2"| Links Count
−
| X || Int || Player X as a [[Data_Types#Fixed-point_numbers|Fixed-Point number]]
+
| colspan="2"| {{Type|VarInt}}
−
|-
+
| The number of links in the following array.
−
| Y || Int || Player X as a [[Data_Types#Fixed-point_numbers|Fixed-Point number]]
+
|-
−
|-
+
| rowspan="3"| Links
−
| Z || Int || Player X as a [[Data_Types#Fixed-point_numbers|Fixed-Point number]]
+
| Is built-in
−
|-
+
| rowspan="3"| {{Type|Array}}
−
| Yaw || Byte || Player rotation as a packed byte
+
| {{Type|Boolean}}
−
|-
+
| Determines if the following label is built-in (from enum) or custom (text component).
−
| Pitch || Byte || Player rotation as a packet byte
+
|-
−
|-
+
| Label
−
| 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. A negative value crashes clients.
+
| {{Type|VarInt}} {{Type|Enum}} / {{Type|Text Component}}
−
|-
+
| See below.
−
| Metadata || [[Entities#Entity_Metadata_Format|Metadata]] || The client will crash if no metadata is sent
+
|-
 +
| URL
 +
| {{Type|String}}
 +
| Valid URL.
 
|}
 
|}
  
−
== Status ==
+
{| class="wikitable" {{added}}
 +
! ID
 +
! Name
 +
! Notes
 +
|-
 +
| 0
 +
| Bug Report
 +
| Displayed on connection error screen; included as a comment in the disconnection report.
 +
|-
 +
| 1
 +
| Community Guidelines
 +
|
 +
|-
 +
| 2
 +
| Support
 +
|
 +
|-
 +
| 3
 +
| Status
 +
|
 +
|-
 +
| 4
 +
| Feedback
 +
|
 +
|-
 +
| 5
 +
| Community
 +
|
 +
|-
 +
| 6
 +
| Website
 +
|
 +
|-
 +
| 7
 +
| Forums
 +
|
 +
|-
 +
| 8
 +
| News
 +
|
 +
|-
 +
| 9
 +
| Announcements
 +
|
 +
|-
 +
|}
  
−
== Login ==
+
=== Serverbound ===
  
−
== Plugin Channels ==
+
No changes so far.
  
−
=== MC|RPack ===
+
[[Category:Minecraft Modern]]
−
{| class="wikitable"
 
−
! Field Name !! Field Type !! Example !! Notes
 
−
|-
 
−
| Resource pack URL || UTF8 string || http://example.com/pack.zip ||
 
−
|}
 

Latest revision as of 10:40, 8 June 2024

This page documents the changes from the last stable Minecraft release (currently 1.20.6, protocol 766) to the current pre-release (currently 1.21-pre2, protocol Snapshot 200). 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 documented so far.

Packets

ID Packet name Documentation
Configuration clientbound
0x0F Clientbound Report Details (configuration) Pre
0x10 Clientbound Server Links (configuration) Pre
Play clientbound
0x7A Clientbound Report Details (play) Pre
0x7B Clientbound Server Links (play) Pre

Handshake

No changes so far.

Status

No changes so far.

Login

No changes so far.

Configuration

Clientbound

Clientbound Report Details (configuration)

Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.

Packet ID State Bound To Field Name Field Type Notes
0x0F Configuration Client Details Count VarInt (32) The number of details in the following array.
Details Title Array String (128)
Description String (4096)

Clientbound Server Links (configuration)

This packet contains a list of links that the Notchian client will display in the menu available from the pause menu. Link labels can be built-in or custom (i.e., any text).

Packet ID State Bound To Field Name Field Type Notes
0x10 Configuration Client Links Count VarInt The number of links in the following array.
Links Is built-in Array Boolean Determines if the following label is built-in (from enum) or custom (text component).
Label VarInt Enum / Text Component See below.
URL String Valid URL.


ID Name Notes
0 Bug Report Displayed on connection error screen; included as a comment in the disconnection report.
1 Community Guidelines
2 Support
3 Status
4 Feedback
5 Community
6 Website
7 Forums
8 News
9 Announcements

Serverbound

No changes so far.

Play

Clientbound

Clientbound Report Details (play)

Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.

Packet ID State Bound To Field Name Field Type Notes
0x7A Configuration Client Details Count VarInt (32) The number of details in the following array.
Details Title Array String (128)
Description String (4096)

Clientbound Server Links (play)

This packet contains a list of links that the Notchian client will display in the menu available from the pause menu. Link labels can be built-in or custom (i.e., any text).

Packet ID State Bound To Field Name Field Type Notes
0x7B Configuration Client Links Count VarInt The number of links in the following array.
Links Is built-in Array Boolean Determines if the following label is built-in (from enum) or custom (text component).
Label VarInt Enum / Text Component See below.
URL String Valid URL.
ID Name Notes
0 Bug Report Displayed on connection error screen; included as a comment in the disconnection report.
1 Community Guidelines
2 Support
3 Status
4 Feedback
5 Community
6 Website
7 Forums
8 News
9 Announcements

Serverbound

No changes so far.

Retrieved from "https://wiki.vg/index.php?title=Pre-release_protocol&oldid=19307"