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|1.12.1, protocol 338]]) to the current pre-release (currently [[Protocol version numbers|1.12.2-pre2, protocol 339]]). 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 ===
  
No changes so far.
+
No changes documented so far.
  
 
=== Packets ===
 
=== Packets ===
Line 18: Line 18:
 
  !colspan="2"| Documentation
 
  !colspan="2"| Documentation
 
  |-
 
  |-
!colspan="4"| Handshaking serverbound
+
!colspan="4"| Configuration clientbound
{{PacketList|0x00|Handshake}}
+
{{PacketList|0x0F|Clientbound Report Details (configuration)|rel=added}}
 +
{{PacketList|0x10|Clientbound Server Links (configuration)|rel=added}}
 
  |-
 
  |-
!colspan="4"| Play clientbound
+
!colspan="4"| Play clientbound
{{PacketList|0x1F|Keep Alive (clientbound)}}
+
{{PacketList|0x7A|Clientbound Report Details (play)|rel=added}}
 +
{{PacketList|0x7B|Clientbound Server Links (play)|rel=added}}
 
  |-
 
  |-
!colspan="4"| Play serverbound
+
|}
{{PacketList|0x0B|Keep Alive (serverbound)}}
 
|}
 
  
== New/modified data types ==
+
== Handshake ==
  
 
No changes so far.
 
No changes so far.
  
== Block Actions ==
+
== Status ==
  
No changes so far.  
+
No changes so far.
  
== Play ==
+
== Login ==
 +
 
 +
No changes so far.
 +
 
 +
== Configuration ==
  
 
=== Clientbound ===
 
=== Clientbound ===
  
==== Keep Alive (clientbound) ====
+
==== Clientbound Report Details (configuration) ====
 
 
{{Need Info|"random ID" and such seem to no longer actually be the case.  For the client, this doesn't matter (just parrot back the same data), but what the numbers actually mean and how the server uses them seem to be different now.}}
 
  
The server will frequently send out a keep-alive, each containing a random ID. The client must respond with the same packet. If the client does not respond to them for over 30 seconds, the server kicks the client. Vice versa, if the server does not send any keep-alives for 20 seconds, the client will disconnect and yields a "Timed out" exception.
+
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}}
 
  ! 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="1"| 0x1F
+
  | rowspan="3"| 0x0F
  |rowspan="1"| Play
+
  | rowspan="3"| Configuration
  |rowspan="1"| Client
+
  | rowspan="3"| Client
  | Keep Alive ID
+
  | colspan="2"| Details Count
  | {{Change|VarInt|Long}}
+
  | colspan="2"| {{Type|VarInt}} (32)
  |  
+
| The number of details in the following array.
  |}
+
|-
 
+
| rowspan="2"| Details
=== Serverbound ===
+
| Title
 +
| rowspan="2"| {{Type|Array}}
 +
| {{Type|String}} (128)
 +
|
 +
|-
 +
  | Description
 +
  | {{Type|String}} (4096)
 +
|
 +
|}
  
==== Keep Alive (serverbound) ====
+
==== Clientbound Server Links (configuration) ====
  
The server will frequently send out a keep-alive, each containing a random ID. The client must respond with the same packet.
+
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
 
  |-
 
  |-
  | 0x0B
+
  | rowspan="4"| 0x10
  | Play
+
| rowspan="4"| Configuration
  | Server
+
| rowspan="4"| Client
  | Keep Alive ID
+
| colspan="2"| Links Count
  | {{Change|VarInt|Long}}
+
| 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.
 +
|}
 +
 
 +
 
 +
{| 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
 
  |  
 
  |  
 +
|-
 
  |}
 
  |}
  
 +
=== Serverbound ===
 +
 +
No changes so far.
  
== Handshaking ==
+
== Play ==
  
 
=== Clientbound ===
 
=== Clientbound ===
  
No changes so far.
+
==== Clientbound Report Details (play) ====
 
 
=== Serverbound ===
 
 
 
==== Handshake ====
 
  
This causes the server to switch into the target state.
+
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}}
 
  ! 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="4"| 0x00
+
  | rowspan="3"| 0x7A
  |rowspan="4"| Handshaking
+
  | rowspan="3"| Configuration
  |rowspan="4"| Server
+
  | rowspan="3"| Client
  | Protocol Version
+
  | colspan="2"| Details Count
  | VarInt
+
  | colspan="2"| {{Type|VarInt}} (32)
| See [[protocol version numbers]] (currently {{change|338|339}})
+
| The number of details in the following array.
 
  |-
 
  |-
  | Server Address
+
  | rowspan="2"| Details
  | String
+
  | Title
  | Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect.  The Notchian server does not use this information.
+
  | rowspan="2"| {{Type|Array}}
|-
+
  | {{Type|String}} (128)
  | Server Port
+
  |
| Unsigned Short
 
  | Default is 25565.  The Notchian server does not use this information.
 
 
  |-
 
  |-
  | Next State
+
  | Description
  | VarInt Enum
+
  | {{Type|String}} (4096)
  | 1 for [[#Status|status]], 2 for [[#Login|login]]
+
  |
|}
+
|}
  
== Status ==
+
==== Clientbound Server Links (play) ====
  
=== Clientbound ===
+
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).
  
No changes so far.
+
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
| rowspan="4"| 0x7B
 +
| 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.
 +
|}
  
=== Serverbound ===
+
{| class="wikitable" {{added}}
 
+
! ID
No changes so far.
+
! Name
 
+
! Notes
== Login ==
+
|-
 
+
| 0
=== Clientbound ===
+
| Bug Report
 
+
| Displayed on connection error screen; included as a comment in the disconnection report.
No changes so far.
+
|-
 +
| 1
 +
| Community Guidelines
 +
|
 +
|-
 +
| 2
 +
| Support
 +
|
 +
|-
 +
| 3
 +
| Status
 +
|
 +
|-
 +
| 4
 +
| Feedback
 +
|
 +
|-
 +
| 5
 +
| Community
 +
|
 +
|-
 +
| 6
 +
| Website
 +
|
 +
|-
 +
| 7
 +
| Forums
 +
|
 +
|-
 +
| 8
 +
| News
 +
|
 +
|-
 +
| 9
 +
| Announcements
 +
|
 +
|-
 +
|}
  
 
=== Serverbound ===
 
=== Serverbound ===
  
 
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.