Difference between revisions of "Pre-release protocol"

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(added 0x85)
(Updated to 1.21-pre2)
 
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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.
None
 
  
== Protocol Version ==
+
== Contents ==
1.6.2 (74)
 
  
== New Packets ==
+
<div style="float:right;">__TOC__</div>
{{anchor|0x85}}
 
=== Sign Placement? (0x85) ===
 
''Server to Client''
 
  
Sent on placement of sign. Initial byte seems to always be 0.
+
=== Data types ===
 +
 
 +
No changes documented so far.
 +
 
 +
=== Packets ===
  
 
{| class="wikitable"
 
{| class="wikitable"
|-
+
! ID
| Packet ID
+
! Packet name
| Field Name
+
!colspan="2"| Documentation
| Field Type
+
|-
| Example
+
!colspan="4"| Configuration clientbound
| Notes
+
{{PacketList|0x0F|Clientbound Report Details (configuration)|rel=added}}
|-
+
{{PacketList|0x10|Clientbound Server Links (configuration)|rel=added}}
| rowspan="4" | 0x85
+
|-
| Unknown
+
!colspan="4"| Play clientbound
| byte
+
{{PacketList|0x7A|Clientbound Report Details (play)|rel=added}}
| <code>0</code>
+
{{PacketList|0x7B|Clientbound Server Links (play)|rel=added}}
| Unknown, always seems to be 0.
+
|-
|-
+
|}
| X
+
 
| int
+
== Handshake ==
| <code>70</code>
+
 
| X in block coordinates
+
No changes so far.
|-
+
 
| Y
+
== Status ==
| int
+
 
| <code>70</code>
+
No changes so far.
| Y in block coordinates
+
 
|-
+
== Login ==
| Z
+
 
| int
+
No changes so far.
| <code>-46</code>
+
 
| Z in block coordinates
+
== Configuration ==
|-
+
 
| Total Size:
+
=== Clientbound ===
| colspan="4" | 14 bytes
+
 
 +
==== 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.
 +
 
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
| rowspan="3"| 0x0F
 +
| 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)
 +
|
 +
|}
 +
 
 +
==== 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).
 +
 
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
| rowspan="4"| 0x10
 +
| 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.
 
|}
 
|}
  
== Changed Packets ==
 
  
{{anchor|0x2C}}
+
{| class="wikitable" {{added}}
=== Entity Properties (0x2C) ===
+
! ID
''Server to Client''
+
! 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) ====
  
'''Note''': The server sends this packet to inform the user of its movement speed. Users move far too fast when this packet is not sent.
+
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
| Field Name
+
! Bound To
| Field Type
+
! colspan="2"| Field Name
| Example
+
! colspan="2"| Field Type
| Notes
+
! Notes
|-
+
|-
| rowspan="6" | 0x2C
+
| rowspan="3"| 0x7A
| EntityID
+
| rowspan="3"| Configuration
| int
+
| rowspan="3"| Client
| 195
+
| colspan="2"| Details Count
| ?
+
| colspan="2"| {{Type|VarInt}} (32)
|-
+
| The number of details in the following array.
| Properties Count
+
|-
| int
+
| rowspan="2"| Details
| 3
+
| Title
| Number of string/data (including these lists) pairs that follow. The remaining fields here are repeated this number of times.
+
| rowspan="2"| {{Type|Array}}
|-
+
| {{Type|String}} (128)
| Key
+
|
| string16
+
|-
| "generic.Maxhealth"
+
| Description
|  
+
| {{Type|String}} (4096)
|-
+
|
| Value
 
| double
 
| 20.0
 
|  
 
|-
 
| ListLength
 
| short
 
| 1
 
| Number of list elements that follow.
 
|-
 
| ListElement
 
| {long, long, double, byte}
 
|  
 
|
 
|-
 
| Total Size:
 
| colspan="4" | ? bytes
 
 
|}
 
|}
  
Known 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).
| Key
+
 
| Default
+
{| class="wikitable" {{added}}
| Min
+
! Packet ID
| Max
+
! State
| Label
+
! Bound To
|-
+
! colspan="2"| Field Name
| generic.maxHealth
+
! colspan="2"| Field Type
| 20.0
+
! Notes
| 0.0
+
|-
| Double.MaxValue
+
| rowspan="4"| 0x7B
| Max Health
+
| rowspan="4"| Configuration
|-
+
| rowspan="4"| Client
| generic.followRange
+
| colspan="2"| Links Count
| 32.0
+
| colspan="2"| {{Type|VarInt}}
| 0.0
+
| The number of links in the following array.
| 2048.0
+
|-
| Follow Range
+
| rowspan="3"| Links
|-
+
| Is built-in
| generic.knockbackResistance
+
| rowspan="3"| {{Type|Array}}
| 0.0
+
| {{Type|Boolean}}
| 0.0
+
| Determines if the following label is built-in (from enum) or custom (text component).
| 1.0
+
|-
| Knockback Resistance
+
| Label
|-
+
| {{Type|VarInt}} {{Type|Enum}} / {{Type|Text Component}}
| generic.movementSpeed
+
| See below.
| 0.699999988079071
+
|-
| 0.0
+
| URL
| Double.MaxValue
+
| {{Type|String}}
| Movement Speed
+
| Valid URL.
|-
 
| generic.attackDamage
 
| 2.0
 
| 0.0
 
| Double.MaxValue
 
|  
 
|-
 
| horse.jumpStrength
 
| 0.7
 
| 0.0
 
| 2.0
 
| Jump Strength
 
|-
 
| zombie.spawnReinforcements
 
| 0.0
 
| 0.0
 
| 1.0
 
| Spawn Reinforcements Chance
 
 
|}
 
|}
  
 +
{| 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 ===
  
== Removed Packets ==
+
No changes so far.
None
 
  
== Changed Data Types ==
+
[[Category:Minecraft Modern]]
None
 

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.