Difference between revisions of "Pre-release protocol"

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(23w41a)
(Updated to 1.21-pre2)
 
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This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.20.2, protocol 764]]) to the current pre-release (currently [[Protocol version numbers|23w41a, protocol {{Snapshot PVN|1073741980}}]]). 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.
  
 
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 9: Line 9:
 
=== Data types ===
 
=== Data types ===
  
−
==== NBT ====
+
No changes documented so far.
−
 
 
−
The NBT specification was changed so that the root tag is no longer required to be a [[NBT#Specification:compound_tag|Compound Tag]] when sent over the network.
 
−
 
 
−
Presently in the pre-release, only [[NBT#Specification:compound_tag|Compound Tag]] and [[NBT#Specification:string_tag|String Tag]] types are used as root, but the Notchian server/client implementation is able to handle [[NBT#Specification|NBT Tags]] of any type.
 
−
 
 
−
==== Chat ====
 
−
 
 
−
The [[Chat]] type is now serialized as a [[NBT#Specification|NBT Tag]] instead of a JSON String.
 
−
 
 
−
{| class="wikitable"
 
−
|-
 
−
! Name
 
−
! Size (bytes)
 
−
! Encodes
 
−
! Notes
 
−
|- {{removed}}
 
−
! id=Definitions:chat | [[#Definitions:chat|Chat]]
 
−
| ≥ 1 <br />≤ (262144&times;4) + 3
 
−
| See [[Chat]]
 
−
| Encoded as a String with max length of 262144.
 
−
|- {{added}}
 
−
! id=Definitions:chat | [[#Definitions:chat|Chat]]
 
−
| Varies
 
−
| See [[Chat]]
 
−
| Encoded as a [[NBT|NBT Tag]], with the type of tag used depending on the case:
 
−
* As a [[NBT#Specification:string_tag|String Tag]]: For components only containing text (no styling, no events etc.).
 
−
* As a [[NBT#Specification:compound_tag|Compound Tag]]: Every other case.
 
−
|}
 
−
 
 
−
This affects all packets and data types containing Chat fields:
 
−
* [[Protocol#Disconnect (login)|Disconnect (login)]]
 
−
* [[Protocol#Disconnect (configuration)|Disconnect (configuration)]]
 
−
* [[Protocol#Resource Pack (configuration)|Resource Pack (configuration)]]
 
−
* [[Protocol#Boss Bar|Boss Bar]]
 
−
* [[Protocol#Command Suggestions Response|Command Suggestions Response]]
 
−
* [[Protocol#Disconnect (play)|Disconnect (play)]]
 
−
* [[Protocol#Disguised Chat Message|Disguised Chat Message]]
 
−
* [[Protocol#Map Data|Map Data]]
 
−
* [[Protocol#Open Screen|Open Screen]]
 
−
* [[Protocol#Player Chat Message|Player Chat Message]]
 
−
* [[Protocol#Combat Death|Combat Death]]
 
−
* [[Protocol#Player Info Update|Player Info Update]]
 
−
* [[Protocol#Resource Pack (play)|Resource Pack (play)]]
 
−
* [[Protocol#Server Data|Server Data]]
 
−
* [[Protocol#Set Action Bar Text|Set Action Bar Text]]
 
−
* [[Protocol#Update Objectives|Update Objectives]]
 
−
* [[Protocol#Update Teams|Update Teams]]
 
−
* [[Protocol#Set Subtitle Text|Set Subtitle Text]]
 
−
* [[Protocol#Set Title Text|Set Title Text]]
 
−
* [[Protocol#System Chat Message|System Chat Message]]
 
−
* [[Protocol#Set Tab List Header And Footer|Set Tab List Header And Footer]]
 
−
* [[Protocol#Update Advancements|Update Advancements]]
 
−
<br>
 
−
* [[Slot|Slot data type (values in the item NBT field)]]
 
−
* [[Entity_metadata#Entity_Metadata_Format|Chat entity metadata type]]
 
−
* [[Entity_metadata#Entity_Metadata_Format|OptChat entity metadata type]]
 
  
 
=== Packets ===
 
=== Packets ===
Line 74: Line 18:
 
  !colspan="2"| Documentation
 
  !colspan="2"| Documentation
 
  |-
 
  |-
−
!colspan="4"| Play clientbound
+
!colspan="4"| Configuration clientbound
−
{{PacketList|0x20|Game Event}}
+
{{PacketList|0x0F|Clientbound Report Details (configuration)|rel=added}}
 +
{{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}}
 +
|-
 
|}
 
|}
  
−
== New/modified data types ==
+
== Handshake ==
 +
 
 +
No changes so far.
 +
 
 +
== Status ==
 +
 
 +
No changes so far.
 +
 
 +
== Login ==
  
 
No changes so far.
 
No changes so far.
  
−
== Entity Metadata ==
+
== Configuration ==
  
−
=== Abstract Vehicle ===
+
=== Clientbound ===
 +
 
 +
==== Clientbound Report Details (configuration) ====
  
−
{{Metadata inherit|Abstract Vehicle|inherits=Entity|start_at=8}}
+
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"
+
{| class="wikitable" {{added}}
−
  ! Index
+
  ! Packet ID
−
  ! Type
+
  ! State
−
  !style="width: 250px;" colspan="2"| Meaning
+
! Bound To
−
  ! Default
+
  ! colspan="2"| Field Name
−
  |- {{added}}
+
! colspan="2"| Field Type
−
  | {{Metadata id|}}
+
  ! Notes
−
  | VarInt
+
  |-
−
  |colspan="2"| Shaking power
+
  | rowspan="3"| 0x0F
−
  | 0
+
| rowspan="3"| Configuration
−
|- {{added}}
+
  | rowspan="3"| Client
−
  | {{Metadata id|}}
+
  | colspan="2"| Details Count
−
  | VarInt
+
  | colspan="2"| {{Type|VarInt}} (32)
−
  |colspan="2"| Shaking direction
+
  | The number of details in the following array.
−
  | 1
+
  |-
−
  |- {{added}}
+
  | rowspan="2"| Details
−
  | {{Metadata id|}}
+
  | Title
−
  | Float
+
  | rowspan="2"| {{Type|Array}}
−
|colspan="2"| Shaking multiplier
+
  | {{Type|String}} (128)
−
| 0.0
+
  |
 
  |-
 
  |-
−
  |}
+
  | Description
 +
| {{Type|String}} (4096)
 +
|
 +
|}
  
−
=== Abstract Minecart===
+
==== Clientbound Server Links (configuration) ====
  
−
{{Metadata inherit|Abstract Minecart|inherits=Abstract Vehicle}}
+
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"
+
{| class="wikitable" {{added}}
−
  ! Index
+
  ! Packet ID
−
  ! Type
+
  ! State
−
  !style="width: 250px;" colspan="2"| Meaning
+
! Bound To
−
  ! Default
+
  ! colspan="2"| Field Name
−
  |- {{removed}}
+
! colspan="2"| Field Type
−
  | 8
+
  ! Notes
−
| VarInt
+
  |-
−
  |colspan="2"| Shaking power
+
  | rowspan="4"| 0x10
−
  | 0
+
  | rowspan="4"| Configuration
−
|- {{removed}}
+
  | rowspan="4"| Client
−
| 9
+
  | colspan="2"| Links Count
−
| VarInt
+
  | colspan="2"| {{Type|VarInt}}
−
  |colspan="2"| Shaking direction
+
  | The number of links in the following array.
−
| 1
 
−
|- {{removed}}
 
−
| 10
 
−
| Float
 
−
  |colspan="2"| Shaking multiplier
 
−
  | 0.0
 
 
  |-
 
  |-
−
  | 11
+
  | rowspan="3"| Links
−
  | VarInt
+
  | Is built-in
−
  |colspan="2"| Custom block ID and damage
+
  | rowspan="3"| {{Type|Array}}
−
  | 0
+
| {{Type|Boolean}}
 +
  | Determines if the following label is built-in (from enum) or custom (text component).
 
  |-
 
  |-
−
  | 12
+
  | Label
−
  | VarInt
+
  | {{Type|VarInt}} {{Type|Enum}} / {{Type|Text Component}}
−
|colspan="2"| Custom block Y position (in 16ths of a block)
+
  | See below.
−
  | 6
 
 
  |-
 
  |-
−
  | 13
+
  | URL
−
  | Boolean
+
  | {{Type|String}}
−
|colspan="2"| Show custom block
+
  | Valid URL.
−
  | false
+
|}
−
|}
 
  
−
=== Boat ===
 
  
−
{{Metadata inherit|Boat|inherits=Abstract Vehicle}}
+
{| class="wikitable" {{added}}
−
 
+
  ! ID
−
{| class="wikitable"
+
  ! Name
−
  ! Index
+
  ! Notes
−
! Type
+
  |-
−
  !style="width: 250px;" colspan="2"| Meaning
 
−
  ! Default
 
−
  |- {{removed}}
 
−
| 8
 
−
| VarInt
 
−
|colspan="2"| Time since last hit
 
 
  | 0
 
  | 0
−
  |- {{removed}}
+
  | Bug Report
−
  | 9
+
  | Displayed on connection error screen; included as a comment in the disconnection report.
−
  | VarInt
+
  |-
−
|colspan="2"| Forward direction
 
 
  | 1
 
  | 1
−
  |- {{removed}}
+
| Community Guidelines
−
  | 10
+
|
−
  | Float
+
|-
−
  |colspan="2"| Damage taken
+
| 2
−
  | 0.0
+
| Support
 +
|
 +
  |-
 +
  | 3
 +
  | Status
 +
  |  
 +
|-
 +
| 4
 +
| Feedback
 +
|
 +
|-
 +
| 5
 +
| Community
 +
  |  
 
  |-
 
  |-
−
  | 11
+
  | 6
−
  | VarInt
+
  | Website
−
  |colspan="2"| Type (0=oak, 1=spruce, 2=birch, 3=jungle, 4=acacia, 5=dark oak)
+
  |  
−
| 0
 
 
  |-
 
  |-
−
  | 12
+
  | 7
−
  | Boolean
+
  | Forums
−
  |colspan="2"| Is left paddle turning
+
  |  
−
| false
 
 
  |-
 
  |-
−
  | 13
+
  | 8
−
  | Boolean
+
  | News
−
  |colspan="2"| Is right paddle turning
+
  |  
−
  | false
+
|-
 +
| 9
 +
| Announcements
 +
  |  
 
  |-
 
  |-
−
| 14
 
−
| VarInt
 
−
|colspan="2"| Splash timer
 
−
| 0
 
 
  |}
 
  |}
−
 
−
== Block Actions ==
 
−
 
−
No changes so far.
 
−
 
−
== Inventories ==
 
−
 
−
No changes so far.
 
−
 
−
== Plugin Channels ==
 
−
 
−
No changes so far.
 
−
 
−
== Status ==
 
−
 
−
=== Clientbound ===
 
−
 
−
No changes so far.
 
  
 
=== Serverbound ===
 
=== Serverbound ===
Line 220: Line 160:
 
No changes so far.
 
No changes so far.
  
−
== Login ==
+
== Play ==
  
 
=== Clientbound ===
 
=== Clientbound ===
  
−
No changes so far.
+
==== Clientbound Report Details (play) ====
  
−
=== Serverbound ===
+
Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.
  
−
No changes so far.
+
{| class="wikitable" {{added}}
−
 
+
! Packet ID
−
== Configuration ==
+
! State
−
 
+
! Bound To
−
=== Clientbound ===
+
! colspan="2"| Field Name
−
 
+
! colspan="2"| Field Type
−
No changes so far.
+
! Notes
−
 
+
|-
−
=== Serverbound ===
+
| rowspan="3"| 0x7A
−
 
+
| rowspan="3"| Configuration
−
No changes so far.
+
| rowspan="3"| Client
−
 
+
| colspan="2"| Details Count
−
== Play ==
+
| colspan="2"| {{Type|VarInt}} (32)
−
 
+
| The number of details in the following array.
−
=== Clientbound ===
+
|-
 +
| rowspan="2"| Details
 +
| Title
 +
| rowspan="2"| {{Type|Array}}
 +
| {{Type|String}} (128)
 +
|
 +
|-
 +
| Description
 +
| {{Type|String}} (4096)
 +
|
 +
|}
  
−
==== Game Event ====
+
==== Clientbound Server Links (play) ====
  
−
Used for a wide variety of game events, from weather to bed use to game mode to demo messages.
+
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"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
−
  ! Field Name
+
  ! colspan="2"| Field Name
−
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | rowspan="2"| 0x20
+
  | rowspan="4"| 0x7B
−
  | rowspan="2"| Play
+
| rowspan="4"| Configuration
−
  | rowspan="2"| Client
+
| rowspan="4"| Client
−
  | Event
+
| colspan="2"| Links Count
−
  | Unsigned Byte
+
| 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.
 
  | See below.
 
  |-
 
  |-
−
  | Value
+
  | URL
−
  | Float
+
  | {{Type|String}}
−
  | Depends on Event.
+
  | Valid URL.
−
|}
+
|}
  
−
''Events'':
+
{| class="wikitable" {{added}}
−
 
+
  ! ID
−
{| class="wikitable"
+
  ! Name
−
  ! Event
+
  ! Notes
−
  ! Effect
 
−
  ! Value
 
 
  |-
 
  |-
 
  | 0
 
  | 0
−
  | No respawn block available
+
  | Bug Report
−
  | Note: Displays message 'block.minecraft.spawn.not_valid' (You have no home bed or charged respawn anchor, or it was obstructed) to the player.
+
  | Displayed on connection error screen; included as a comment in the disconnection report.
 
  |-
 
  |-
 
  | 1
 
  | 1
−
  | Begin raining
+
  | Community Guidelines
−
  |
+
  |  
 
  |-
 
  |-
 
  | 2
 
  | 2
−
  | End raining
+
  | Support
−
  |
+
  |  
 
  |-
 
  |-
 
  | 3
 
  | 3
−
  | Change game mode
+
  | Status
−
  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
+
  |  
 
  |-
 
  |-
 
  | 4
 
  | 4
−
  | Win game
+
  | Feedback
−
  | 0: Just respawn player.<br>1: Roll the credits and respawn player.<br>Note that 1 is only sent by notchian server when player has not yet achieved advancement "The end?", else 0 is sent.
+
  |  
 
  |-
 
  |-
 
  | 5
 
  | 5
−
  | Demo event
+
  | Community
−
  | 0: Show welcome to demo screen.<br>101: Tell movement controls.<br>102: Tell jump control.<br>103: Tell inventory control.<br>104: Tell that the demo is over and print a message about how to take a screenshot.
+
  |  
 
  |-
 
  |-
 
  | 6
 
  | 6
−
  | Arrow hit player
+
  | Website
−
  | Note: Sent when any player is struck by an arrow.
+
  |  
 
  |-
 
  |-
 
  | 7
 
  | 7
−
  | Rain level change
+
  | Forums
−
  | Note: Seems to change both sky color and lighting.<br>Rain level ranging from 0 to 1.
+
  |  
 
  |-
 
  |-
 
  | 8
 
  | 8
−
  | Thunder level change
+
  | News
−
  | Note: Seems to change both sky color and lighting (same as Rain level change, but doesn't start rain). It also requires rain to render by notchian client.<br>Thunder level ranging from 0 to 1.
+
  |  
 
  |-
 
  |-
 
  | 9
 
  | 9
−
  | Play pufferfish sting sound
+
  | Announcements
−
  |-
+
  |  
−
| 10
 
−
| Play elder guardian mob appearance (effect and sound)
 
−
|
 
−
|-
 
−
| 11
 
−
| Enable respawn screen
 
−
|  0: Enable respawn screen.<br>1: Immediately respawn (sent when the <code>doImmediateRespawn</code> gamerule changes).
 
 
  |-
 
  |-
−
| 12
 
−
| Limited crafting
 
−
| 0: Disable limited crafting.<br>1: Enable limited crafting (sent when the <code>doLimitedCrafting</code> gamerule changes).
 
−
|- {{added}}
 
−
| 13
 
−
| Start waiting for level chunks
 
−
| Instructs the client to begin the waiting process for the level chunks.<br>Sent by the server after the level is cleared on the client and is being re-sent (either during the first, or subsequent reconfigurations).
 
 
  |}
 
  |}
  
Line 334: Line 278:
  
 
No changes so far.
 
No changes so far.
−
 
  
 
[[Category:Minecraft Modern]]
 
[[Category:Minecraft Modern]]

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"