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|1.9.2, protocol 109]]) to the current pre-release (currently [[Protocol version numbers|1.9.3-pre3, protocol 110]]). 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|0x09|Update Block Entity}}
+
{{PacketList|0x7A|Clientbound Report Details (play)|rel=added}}
−
{{PacketList|0x20|Chunk data}}
+
{{PacketList|0x7B|Clientbound Server Links (play)|rel=added}}
−
{{PacketList|0x46|Update Sign (clientbound)|pre=removed}}
+
|-
−
{{PacketList|{{Change|0x47|0x46}}|Sound Effect|pre=unchanged}}
+
|}
−
{{PacketList|{{Change|0x48|0x47}}|Player List Header And Footer|pre=unchanged}}
 
−
{{PacketList|{{Change|0x49|0x48}}|Collect Item|pre=unchanged}}
 
−
{{PacketList|{{Change|0x4A|0x49}}|Entity Teleport|pre=unchanged}}
 
−
{{PacketList|{{Change|0x4B|0x4A}}|Entity Properties|pre=unchanged}}
 
−
{{PacketList|{{Change|0x4C|0x4B}}|Entity effect|pre=unchanged}}
 
−
|}
 
  
−
== New/modified data types ==
+
== Handshake ==
  
−
None so far.
+
No changes so far.
  
−
== <code>MC|StopSound</code> plugin channel ==
+
== Status ==
  
−
Used to implement {{Minecraft Wiki|Commands#StopSound|the <code>/stopsound</code> command}}.  Stops a sound that is currently playing on the client.
+
No changes so far.
  
−
{| class="wikitable"
+
== Login ==
−
! Field name
 
−
! Field type
 
−
! Notes
 
−
|-
 
−
| Sound name
 
−
| String
 
−
| A [http://pokechu22.github.io/Burger/1.9.html#sounds sound effect name].  If left empty, ''all'' sounds are stopped.
 
−
|-
 
−
| Sound category
 
−
| String
 
−
| Should be one of the sound categories used in [[Protocol#Named Sound Effect|Named Sound Effect]], but if it's invalid or empty then it is (intentionally) treated as ''all'' sound categories.
 
−
|}
 
  
−
Emptiness of sound category or sound name can be combined, IE a empty sound name but a set sound category will stop all sounds in the given category.
+
No changes so far.
  
−
== Handshaking ==
+
== Configuration ==
  
 
=== Clientbound ===
 
=== Clientbound ===
  
−
No changes so far.
+
==== Clientbound Report Details (configuration) ====
  
−
=== 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
 +
! 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)
 +
|
 +
|}
  
−
==== Handshake ====
+
==== Clientbound Server Links (configuration) ====
  
−
This causes the server to switch into the target state.
+
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
 +
|-
 +
| 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.
 +
|}
 +
 
 +
 
 +
{| class="wikitable" {{added}}
 +
! ID
 +
! Name
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  |rowspan="4"| 0x00
+
  | 0
−
  |rowspan="4"| Handshaking
+
| Bug Report
−
  |rowspan="4"| Server
+
| Displayed on connection error screen; included as a comment in the disconnection report.
−
  | Protocol Version
+
|-
−
  | VarInt
+
| 1
−
  | See [[protocol version numbers]] (currently {{change|109|110}})
+
| Community Guidelines
 +
|
 +
|-
 +
| 2
 +
| Support
 +
|
 +
|-
 +
| 3
 +
| Status
 +
|
 +
|-
 +
| 4
 +
| Feedback
 +
|
 +
|-
 +
| 5
 +
| Community
 +
|
 +
|-
 +
  | 6
 +
| Website
 +
|
 +
|-
 +
  | 7
 +
| Forums
 +
  |  
 +
  |-
 +
  | 8
 +
| News
 +
|  
 
  |-
 
  |-
−
  | Server Address
+
  | 9
−
  | String
+
  | Announcements
−
  | Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect.  The Notchian server does not use this information.
+
  |  
−
|-
 
−
| Server Port
 
−
| Unsigned Short
 
−
| Default is 25565.  The Notchian server does not use this information.
 
 
  |-
 
  |-
−
| Next State
 
−
| VarInt Enum
 
−
| 1 for [[#Status|status]], 2 for [[#Login|login]]
 
 
  |}
 
  |}
  
 +
=== Serverbound ===
 +
 +
No changes so far.
  
 
== Play ==
 
== Play ==
Line 104: Line 164:
 
=== Clientbound ===
 
=== Clientbound ===
  
−
==== Update Block Entity ====
+
==== Clientbound Report Details (play) ====
  
−
Essentially a block update on a block entity.
+
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="3"| 0x09
+
  | rowspan="3"| 0x7A
−
  |rowspan="3"| Play
+
  | rowspan="3"| Configuration
−
  |rowspan="3"| Client
+
  | rowspan="3"| Client
−
  | Location
+
  | colspan="2"| Details Count
−
  | Position
+
  | colspan="2"| {{Type|VarInt}} (32)
−
  |  
+
  | The number of details in the following array.
 
  |-
 
  |-
−
  | Action
+
  | rowspan="2"| Details
−
  | Unsigned Byte
+
| Title
−
  | The type of update to perform, see below
+
| rowspan="2"| {{Type|Array}}
 +
  | {{Type|String}} (128)
 +
  |
 
  |-
 
  |-
−
  | NBT Data
+
  | Description
−
  | Optional [[NBT|NBT Tag]]
+
  | {{Type|String}} (4096)
−
| If not present then it's a TAG_END (0)
+
  |
−
  |}
+
|}
−
 
 
−
''Action'' field:
 
−
 
 
−
* '''1''': Set SpawnPotentials of a mob spawner
 
−
* '''2''': Set command block text (command and last execution status)
 
−
* '''3''': Set the level, primary, and secondary powers of a beacon
 
−
* '''4''': Set rotation and skin of mob head
 
−
* '''5''': Set type of flower in flower pot
 
−
* '''6''': Set base color and patterns on a banner
 
−
* '''7''': Set the data for a Structure tile entity
 
−
* '''8''': Set the destination for a end gateway
 
−
* {{Change||'''9''': Set the text for a sign}}
 
  
−
==== Chunk Data ====
+
==== Clientbound Server Links (play) ====
−
{{See also|#Unload Chunk}}
 
  
−
The server only sends skylight information for chunk pillars in the {{Minecraft Wiki|Overworld}}, it's up to the client to know in which dimenison the player is currently located. You can also infer this information from the primary bitmask and the amount of uncompressed bytes sent. {{change||This also sends all tile entities in the chunk.}}
+
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
 +
|-
 +
| 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.
 +
|}
 +
 
 +
{| class="wikitable" {{added}}
 +
! ID
 +
! Name
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  |rowspan="9"| 0x20
+
  | 0
−
  |rowspan="9"| Play
+
| Bug Report
−
  |rowspan="9"| Client
+
| Displayed on connection error screen; included as a comment in the disconnection report.
−
  | Chunk X
+
|-
−
  | Int
+
| 1
−
  | Block coordinate divided by 16, rounded down
+
| Community Guidelines
 +
|
 +
|-
 +
  | 2
 +
| Support
 +
  |  
 +
|-
 +
  | 3
 +
  | Status
 +
  |  
 
  |-
 
  |-
−
  | Chunk Z
+
  | 4
−
  | Int
+
  | Feedback
−
  | Block coordinate divided by 16, rounded down
+
  |  
 
  |-
 
  |-
−
  | Ground-Up Continuous
+
  | 5
−
  | Boolean
+
  | Community
−
  | This is true if the packet represents all chunk sections in this vertical chunk column, where the Primary Bit Mask specifies exactly which chunk sections are included, and which are air.
+
  |  
 
  |-
 
  |-
−
  | Primary Bit Mask
+
  | 6
−
  | VarInt
+
  | Website
−
  | Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
+
  |  
−
|-
 
−
| Size
 
−
| VarInt
 
−
| Size of Data in bytes, plus size of Biomes in bytes if present
 
 
  |-
 
  |-
−
  | Data
+
  | 7
−
  | Array of [[SMP Map Format|Chunk Section]]
+
  | Forums
−
  | The length of the array is equal to the number of bits set in Primary Bit Mask. Chunks are sent bottom-to-top, i.e. the first chunk, if sent, extends from Y=0 to Y=15.
+
  |  
 
  |-
 
  |-
−
  | Biomes
+
  | 8
−
  | Optional Byte Array
+
  | News
−
  | Only if Ground-Up Continuous: biome array, byte per XZ coordinate, 256 bytes total.
+
  |  
 
  |-
 
  |-
−
  |style="background-color: #d9ead3;"| Number of tile entities
+
  | 9
−
  |style="background-color: #d9ead3;"| VarInt
+
  | Announcements
−
  |style="background-color: #d9ead3;"| Length of the following array
+
  |  
 
  |-
 
  |-
−
|style="background-color: #d9ead3;"| Tile entities
 
−
|style="background-color: #d9ead3;"| Array of [[NBT|NBT Tag]]
 
−
|style="background-color: #d9ead3;"| All tile entities in the chunk.  Use the x, y, and z tags in the NBT to determine their positions.
 
 
  |}
 
  |}
  
Line 201: Line 279:
 
No changes so far.
 
No changes so far.
  
−
== Status ==
+
[[Category:Minecraft Modern]]
−
 
 
−
=== Clientbound ===
 
−
 
 
−
No changes so far.
 
−
 
 
−
=== Serverbound ===
 
−
 
 
−
No changes so far.
 
−
 
 
−
== Login ==
 
−
 
 
−
=== Clientbound ===
 
−
 
 
−
No changes so far.
 
−
 
 
−
=== Serverbound ===
 
−
 
 
−
No changes so far.
 

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.

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