Difference between revisions of "Pre-release protocol"

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(Updated to 1.21-pre2)
 
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−
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently 1.5, protocol 60) to the current pre-release, 13w16b (protocol 63). 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.
  
−
== Protocol Version ==
+
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.
  
−
As of 13w16b the protocol version is 63.
+
== Contents ==
  
−
== New Packets ==
+
<div style="float:right;">__TOC__</div>
  
−
=== Steer Vehicle (0x1B) ===
+
=== Data types ===
  
−
''Client to Server''
+
No changes documented so far.
  
−
Sent by client to steer the horse, minecart and boats.
+
=== Packets ===
−
Horses listen to all directions, boats and minecarts only listen to the positive forward value in combination with the direction the player is looking in.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
−
|- class="row0"
+
! ID
−
| class="col0" | Packet ID
+
! Packet name
−
| class="col1" | Field Name
+
!colspan="2"| Documentation
−
| class="col2" | Field Type
+
|-
−
| class="col3" | Example
+
!colspan="4"| Configuration clientbound
−
| class="col4" | Notes
+
{{PacketList|0x0F|Clientbound Report Details (configuration)|rel=added}}
−
|- class="row1"
+
{{PacketList|0x10|Clientbound Server Links (configuration)|rel=added}}
−
| class="col0 centeralign" rowspan="4" | 0x1B
+
|-
−
| class="col1 centeralign" | Sideways
+
!colspan="4"| Play clientbound
−
| class="col2 centeralign" | float
+
{{PacketList|0x7A|Clientbound Report Details (play)|rel=added}}
−
| class="col3 centeralign" | 0.98
+
{{PacketList|0x7B|Clientbound Server Links (play)|rel=added}}
−
| class="col4" | Positive to the left of the player
+
|-
−
|- class="row2"
 
−
| class="col0 centeralign" | Forward
 
−
| class="col1 centeralign" | float
 
−
| class="col2 centeralign" | -0.98
 
−
| class="col3" | Positive forward
 
−
|- class="row3"
 
−
| class="col0 centeralign" | Jump
 
−
| class="col1 centeralign" | bool
 
−
| class="col2 centeralign" | true
 
−
| class="col3" |
 
−
|- class="row4"
 
−
| class="col0 centeralign" | Unmount
 
−
| class="col1 centeralign" | bool
 
−
| class="col2 centeralign" | false
 
−
| class="col3" | True when leaving the vehicle
 
−
|- class="row5"
 
−
| class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 11 bytes
 
 
|}
 
|}
  
−
== Changed Packets ==
+
== Handshake ==
  
−
=== Update Health (0x08) ===
+
No changes so far.
  
−
''Server to Client''
+
== Status ==
  
−
Sent by the server to update/set the health of the player it is sent to. Added in protocol version 5.
+
No changes so far.
  
−
Food saturation acts as a food "overcharge". Food values will not decrease while the saturation is over zero. Players logging in automatically get a saturation of 5.0. Eating food increases the saturation as well as the food bar.
+
== Login ==
  
−
{| class="wikitable"
+
No changes so far.
−
|- class="row0"
+
 
−
| class="col0" | Packet ID
+
== Configuration ==
−
| class="col1" | Field Name
 
−
| class="col2" | Field Type
 
−
| class="col3" | Example
 
−
| class="col4" | Notes
 
−
|- class="row1"
 
−
| class="col0 centeralign" rowspan="3" | 0x08
 
−
| class="col1 centeralign" | Health
 
−
| class="col2 centeralign" | '''float'''
 
−
| class="col3 centeralign" | '''20.0'''
 
−
| class="col4" | 0 or less = dead, 20 = full HP
 
−
|- class="row2"
 
−
| class="col0 centeralign" | Food
 
−
| class="col1 centeralign" | short
 
−
| class="col2 centeralign" | 20
 
−
| class="col3" | 0 - 20
 
−
|- class="row3"
 
−
| class="col0 centeralign" | Food Saturation
 
−
| class="col1 centeralign" | float
 
−
| class="col2 centeralign" | 5.0
 
−
| class="col3" | Seems to vary from 0.0 to 5.0 in integer increments
 
−
|- class="row4"
 
−
| class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 11 bytes
 
−
|}
 
  
−
=== Entity Action (0x13) ===
+
=== Clientbound ===
  
−
''Client to Server''
+
==== Clientbound Report Details (configuration) ====
  
−
Sent at least when crouching, leaving a bed, or sprinting.
+
Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.
−
To send action animation to client use 0x28.
 
−
The client will send this with Action ID = 3 when "Leave Bed" is clicked.
 
  
−
{| class="wikitable"
+
{| class="wikitable" {{added}}
−
|- class="row0"
+
! Packet ID
−
| class="col0" | Packet ID
+
! State
−
| class="col1" | Field Name
+
! Bound To
−
| class="col2" | Field Type
+
! colspan="2"| Field Name
−
| class="col3" | Example
+
! colspan="2"| Field Type
−
| class="col4" | Notes
+
! Notes
−
|- class="row1"
+
|-
−
| class="col0 centeralign" rowspan="3" | 0x13
+
| rowspan="3"| 0x0F
−
| class="col1 centeralign" | EID
+
| rowspan="3"| Configuration
−
| class="col2 centeralign" | int
+
| rowspan="3"| Client
−
| class="col3 centeralign" | <code>55534</code>
+
| colspan="2"| Details Count
−
| class="col4" | Player ID
+
| colspan="2"| {{Type|VarInt}} (32)
−
|- class="row2"
+
| The number of details in the following array.
−
| class="col0 centeralign" | Action ID
+
|-
−
| class="col1 centeralign" | byte
+
| rowspan="2"| Details
−
| class="col2 centeralign" | <code>1</code>
+
| Title
−
| class="col3" | The ID of the action, see below.
+
| rowspan="2"| {{Type|Array}}
−
|- class="row2"
+
| {{Type|String}} (128)
−
| class="col0 centeralign" | '''Unknown'''
+
|
−
| class="col1 centeralign" | int
+
|-
−
| class="col2 centeralign" | <code>0</code>
+
| Description
−
| class="col3" | Something to do with horses. Ranged from 0 -> 90
+
| {{Type|String}} (4096)
−
|- class="row3"
+
|
−
| class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 10 bytes
 
 
|}
 
|}
  
−
Action ID can be one of the following values:
+
==== Clientbound Server Links (configuration) ====
  
−
{| 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
+
{| class="wikitable" {{added}}
−
! Action
+
! Packet ID
−
|-
+
! State
−
| 1
+
! Bound To
−
| Crouch
+
! colspan="2"| Field Name
−
|-
+
! colspan="2"| Field Type
−
| 2
+
! Notes
−
| Uncrouch
+
|-
−
|-
+
| rowspan="4"| 0x10
−
| 3
+
| rowspan="4"| Configuration
−
| Leave bed
+
| rowspan="4"| Client
−
|-
+
| colspan="2"| Links Count
−
| 4
+
| colspan="2"| {{Type|VarInt}}
−
| Start sprinting
+
| The number of links in the following array.
−
|-
+
|-
−
| 5
+
| rowspan="3"| Links
−
| Stop sprinting
+
| 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.
 
|}
 
|}
  
−
=== Attach Entity (0x27) ===
 
  
−
''Server to Client''
+
{| 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 ===
  
−
This packet is sent when a player has been attached to an entity (e.g. Minecart)
+
No changes so far.
  
−
{| class="wikitable"
+
== Play ==
−
|- class="row0"
 
−
| class="col0" | Packet ID
 
−
| class="col1" | Field Name
 
−
| class="col2" | Field Type
 
−
| class="col3" | Example
 
−
| class="col4" | Notes
 
−
|- class="row1"
 
−
| class="col0 centeralign" rowspan="3" | 0x27
 
−
| class="col1 centeralign" | Entity ID
 
−
| class="col2 centeralign" | int
 
−
| class="col3 centeralign" | <code>1298</code>
 
−
| class="col4" | The player entity ID being attached
 
−
|- class="row2"
 
−
| class="col0 centeralign" | Vehicle ID
 
−
| class="col1 centeralign" | int
 
−
| class="col2 centeralign" | <code>1805</code>
 
−
| class="col3" | The vehicle entity ID attached to (-1 for unattaching)
 
−
|- class="row2"
 
−
| class="col0 centeralign" | '''Leash'''
 
−
| class="col1 centeralign" | boolean
 
−
| class="col2 centeralign" | <code>false</code>
 
−
| class="col3" | If set to true, leashes the entity to the vehicle
 
−
|- class="row3"
 
−
| class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 10 bytes
 
−
|}
 
  
−
=== Player Abilities (0xCA) ===
+
=== Clientbound ===
  
−
''Two-Way''
+
==== Clientbound Report Details (play) ====
  
−
The latter 2 bytes are used to indicate the walking and flying speeds respectively, while the first byte is used to determine the value of 4 booleans.
+
Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.
−
 
−
The flags are whether damage is disabled (god mode, 8, bit 3), whether the player can fly (4, bit 2), whether the player is flying (2, bit 1), and whether the player is in creative mode (1, bit 0).
 
−
 
−
To get the values of these booleans, simply AND (&) the byte with 1,2,4 and 8 respectively, to get the 0 or 1 bitwise value. To set them OR (|) them with their repspective masks.
 
−
The vanilla client sends this packet when the player starts/stops flying with the second parameter changed accordingly. All other parameters are ignored by the vanilla server.
 
  
−
{| class="wikitable"
+
{| class="wikitable" {{added}}
−
|- class="row0"
+
! Packet ID
−
| class="col0" | Packet ID
+
! State
−
| class="col1" | Field Name
+
! Bound To
−
| class="col2" | Field Type
+
! colspan="2"| Field Name
−
| class="col3" | Example
+
! colspan="2"| Field Type
−
| class="col4" | Notes
+
! Notes
−
|- class="row1"
+
|-
−
| class="col0 centeralign" rowspan=4 | 0xCA
+
| rowspan="3"| 0x7A
−
| class="col1 centeralign" | Flags
+
| rowspan="3"| Configuration
−
| class="col2 centeralign" | byte
+
| rowspan="3"| Client
−
| class="col3 centeralign" | 5
+
| colspan="2"| Details Count
−
| class="col4" |  
+
| colspan="2"| {{Type|VarInt}} (32)
−
|- class="row2"
+
| The number of details in the following array.
−
| class="col0 centeralign" | Flying speed
+
|-
−
| class="col1 centeralign" | '''float'''
+
| rowspan="2"| Details
−
| class="col2 centeralign" | '''0.05'''
+
| Title
−
| class="col3" | previous integer value divided by 250
+
| rowspan="2"| {{Type|Array}}
−
|- class="row3"
+
| {{Type|String}} (128)
−
| class="col0 centeralign" | Walking speed
+
|
−
| class="col1 centeralign" | '''float'''
+
|-
−
| class="col2 centeralign" | '''0.1'''
+
| Description
−
| class="col3" | previous integer value divided by 250
+
| {{Type|String}} (4096)
−
|- class="row2"
+
|
−
| class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 10 bytes
 
 
|}
 
|}
  
−
== Removed Packets ==
+
==== Clientbound Server Links (play) ====
  
−
-None-
+
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"| 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.
 +
|}
  
−
== Changed Data Types ==
+
{| 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
 +
|
 +
|-
 +
|}
  
−
-None-
+
=== Serverbound ===
  
−
== Protocol History ==
+
No changes so far.
  
−
-None-
+
[[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"