Difference between revisions of "Pre-release protocol"

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(Plugin messages haven't actually changed)
(Updated to 1.21-pre2)
 
(66 intermediate revisions by 7 users not shown)
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−
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.20.1, protocol 763]]) to the current pre-release (currently [[Protocol version numbers|23w31a, protocol {{Snapshot PVN|1073741968}}]]). 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"| Login clientbound
+
!colspan="4"| Configuration clientbound
−
{{PacketList|0x02|Login Success}}
+
{{PacketList|0x0F|Clientbound Report Details (configuration)|rel=added}}
−
|-
+
{{PacketList|0x10|Clientbound Server Links (configuration)|rel=added}}
−
!colspan="4"| Login serverbound
 
−
{{PacketList|0x00|Login Start}}
 
−
{{PacketList|0x03|Login Acknowledged|rel=added}}
 
−
|-
 
−
!colspan="4"| Configuration clientbound
 
−
{{PacketList|0x00|Plugin Message (configuration)|rel=added}}
 
−
{{PacketList|0x01|Disconnect (configuration)|rel=added}}
 
−
{{PacketList|0x02|Finish Configuration|rel=added}}
 
−
{{PacketList|0x03|Keep Alive (configuration)|rel=added}}
 
−
{{PacketList|0x04|Ping (configuration)|rel=added}}
 
−
{{PacketList|0x05|Registry Data|rel=added}}
 
−
{{PacketList|0x06|Resource Pack (configuration)|rel=added}}
 
−
{{PacketList|0x07|Feature Flags|rel=added}}
 
−
{{PacketList|0x08|Update Tags|rel=added}}
 
−
|-
 
−
!colspan="4"| Configuration serverbound
 
−
{{PacketList|0x00|Plugin Message (configuration)|rel=added}}
 
−
{{PacketList|0x01|Finish Configuration|rel=added}}
 
−
{{PacketList|0x02|Keep Alive (configuration)|rel=added}}
 
−
{{PacketList|0x03|Pong (configuration)|rel=added}}
 
−
{{PacketList|0x04|Resource Pack|rel=added}}
 
−
|-
 
−
!colspan="4"| Play clientbound
 
−
{{PacketList|0x0D|Chunk Batch Finished|rel=added}}
 
−
{{PacketList|0x0E|Chunk Batch Start|rel=added}}
 
−
{{PacketList|{{change|0x28|0x2A}}|Login (play)}}
 
−
{{PacketList|{{change|0x41|0x43}}|Respawn}}
 
−
{{PacketList|{{change|0x51|0x53}}|Display Objective}}
 
−
{{PacketList|0x65|Start Configuration|rel=added}}
 
−
{{PacketList|0x68|Feature Flags|pre=removed}}
 
−
|-
 
−
!colspan="4"| Play serverbound
 
−
{{PacketList|0x08|Chunk Batch Received|rel=added}}
 
−
{{PacketList|0x0B|Configuration Acknowledged|rel=added}}
 
−
|}
 
−
 
 
−
== New/modified data types ==
 
−
 
 
−
No changes so far.
 
−
 
 
−
== Entity Metadata ==
 
−
 
 
−
=== Display ===
 
−
 
 
−
{{Metadata inherit|Display|inherits=Entity|start_at=8}}
 
−
 
 
−
{| class="wikitable"
 
−
! Index
 
−
! Type
 
−
!style="width: 250px;" colspan="2"| Meaning
 
−
! Default
 
 
  |-
 
  |-
−
  | {{Metadata id|}}
+
  !colspan="4"| Play clientbound
−
| VarInt
+
  {{PacketList|0x7A|Clientbound Report Details (play)|rel=added}}
−
|colspan="2"| Interpolation delay
+
  {{PacketList|0x7B|Clientbound Server Links (play)|rel=added}}
−
| 0
 
−
|- {{removed}}
 
−
  | {{Metadata id|}}
 
−
| VarInt
 
−
|colspan="2"| Interpolation Duration
 
−
| 0
 
−
|- {{added}}
 
−
  | 9
 
−
| VarInt
 
−
|colspan="2"| Transformation interpolation duration
 
−
| 0
 
−
|- {{added}}
 
−
| 10
 
−
| VarInt
 
−
|colspan="2"| Position/Rotation interpolation duration
 
−
| 0
 
 
  |-
 
  |-
−
| {{change|{{Metadata id|}}|11}}
+
|}
−
| Vector3
 
−
|colspan="2"| Translation
 
−
| (0.0, 0.0, 0.0)
 
−
|-
 
−
| {{change|{{Metadata id|}}|12}}
 
−
| Vector3
 
−
|colspan="2"| Scale
 
−
| (1.0, 1.0, 1.0)
 
−
|-
 
−
| {{change|{{Metadata id|}}|13}}
 
−
| Quaternion
 
−
|colspan="2"| Rotation left
 
−
| (0.0, 0.0, 0.0, 1.0)
 
−
|-
 
−
| {{change|{{Metadata id|}}|14}}
 
−
| Quaternion
 
−
|colspan="2"| Rotation right
 
−
| (0.0, 0.0, 0.0, 1.0)
 
−
|-
 
−
| {{change|{{Metadata id|}}|15}}
 
−
| Byte
 
−
|colspan="2"| Billboard Constraints (0 = FIXED, 1 = VERTICAL, 2 = HORIZONTAL, 3 = CENTER)
 
−
| 0
 
−
|-
 
−
| {{change|{{Metadata id|}}|16}}
 
−
| VarInt
 
−
|colspan="2"| Brightness override (<code>blockLight << 4 | skyLight << 20</code>)
 
−
| -1
 
−
|-
 
−
| {{change|{{Metadata id|}}|17}}
 
−
| Float
 
−
|colspan="2"| View range
 
−
| 1.0
 
−
|-
 
−
| {{change|{{Metadata id|}}|18}}
 
−
| Float
 
−
|colspan="2"| Shadow radius
 
−
| 0.0
 
−
|-
 
−
| {{change|{{Metadata id|}}|19}}
 
−
| Float
 
−
|colspan="2"| Shadow strength
 
−
| 1.0
 
−
|-
 
−
| {{change|{{Metadata id|}}|20}}
 
−
| Float
 
−
|colspan="2"| Width
 
−
| 0.0
 
−
|-
 
−
| {{change|{{Metadata id|}}|21}}
 
−
| Float
 
−
|colspan="2"| Height
 
−
| 0.0
 
−
|-
 
−
| {{change|{{Metadata id|}}|22}}
 
−
| VarInt
 
−
|colspan="2"| Glow color override
 
−
| -1
 
−
|}
 
−
 
 
−
=== Block Display ===
 
−
 
 
−
{{Metadata inherit|Block Display|inherits=Display}}
 
−
 
 
−
{| class="wikitable"
 
−
! Index
 
−
! Type
 
−
!style="width: 250px;" colspan="2"| Meaning
 
−
! Default
 
−
|-
 
−
| {{change|{{Metadata id|}}|23}}
 
−
| BlockID
 
−
|colspan="2"| Displayed block state
 
−
| 0 (Air)
 
−
|}
 
−
 
 
−
=== Item Display ===
 
−
 
 
−
{{Metadata inherit|Block Display|inherits=Display}}
 
−
 
 
−
{| class="wikitable"
 
−
! Index
 
−
! Type
 
−
!style="width: 250px;" colspan="2"| Meaning
 
−
! Default
 
−
|-
 
−
| {{change|{{Metadata id|}}|23}}
 
−
| Slot
 
−
|colspan="2"| Displayed item
 
−
| Empty
 
−
|-
 
−
| {{change|{{Metadata id|}}|24}}
 
−
| Byte
 
−
|colspan="2"| Display type:
 
−
* 0 = NONE
 
−
* 1 = THIRD_PERSON_LEFT_HAND
 
−
* 2 = THIRD_PERSON_RIGHT_HAND
 
−
* 3 = FIRST_PERSON_LEFT_HAND
 
−
* 4 = FIRST_PERSON_RIGHT_HAND
 
−
* 5 = HEAD
 
−
* 6 = GUI
 
−
* 7 = GROUND
 
−
* 8 = FIXED
 
−
| 0 (NONE)
 
−
|}
 
−
 
 
−
=== Text Display ===
 
  
−
{{Metadata inherit|Text Display|inherits=Display}}
+
== Handshake ==
−
 
 
−
{| class="wikitable"
 
−
! Index
 
−
! Type
 
−
!style="width: 250px;" colspan="2"| Meaning
 
−
! Default
 
−
|-
 
−
| {{change|{{Metadata id|}}|23}}
 
−
| Chat
 
−
|colspan="2"| Text
 
−
| Empty
 
−
|-
 
−
| {{change|{{Metadata id|}}|24}}
 
−
| VarInt
 
−
|colspan="2"| Line width
 
−
| 200
 
−
|-
 
−
| {{change|{{Metadata id|}}|25}}
 
−
| VarInt
 
−
|colspan="2"| Background color
 
−
| 1073741824 (0x40000000)
 
−
|-
 
−
| {{change|{{Metadata id|}}|26}}
 
−
| Byte
 
−
|colspan="2"| Text opacity
 
−
| -1 (fully opaque)
 
−
|-
 
−
| rowspan="5" | {{change|{{Metadata id|}}|27}}
 
−
| rowspan="5" | Byte
 
−
! Bit mask
 
−
! Meaning
 
−
| rowspan="5" | 0
 
−
|-
 
−
| 0x01 || Has shadow
 
−
|-
 
−
| 0x02 || Is see through
 
−
|-
 
−
| 0x04 || Use default background color
 
−
|-
 
−
| 0x08 || Alignment:
 
−
* 0 = CENTER
 
−
* 1 or 3 = LEFT
 
−
* 2 = RIGHT
 
−
|}
 
−
 
 
−
== Block Actions ==
 
  
 
No changes so far.
 
No changes so far.
  
−
== Inventories ==
+
== Status ==
  
 
No changes so far.
 
No changes so far.
  
−
== Plugin Channels ==
+
== Login ==
  
 
No changes so far.
 
No changes so far.
  
−
== Play ==
+
== Configuration ==
  
 
=== Clientbound ===
 
=== Clientbound ===
  
 +
==== Clientbound Report Details (configuration) ====
  
−
==== Chunk Batch Finished ====
+
Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.
−
 
 
−
{{Need Info|Why does the formula uses <code>25</code> instead of the normal tick duration of <code>50</code>?}}
 
−
 
 
−
Marks the end of a chunk batch. The Notchian client marks the time it receives this packet and calculates the ellapsed duration since the [[#Chunk Batch Start|beggining of the chunk batch]]. The server uses this duration and the batch size received in this packet to estimate the number of milliseconds ellapsed per chunk received. This value is then used to calculate the desired number of chunks per tick through the formula <code>25 / millisPerChunk</code>, which is reported to the server through [[#Chunk Batch Received|Chunk Batch Received]].
 
−
 
 
−
The Notchian client uses the samples from the latest 15 batches to estimate the milliseconds per chunk number.
 
  
 
{| class="wikitable" {{added}}
 
{| class="wikitable" {{added}}
Line 277: Line 52:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
−
  ! Field Name
+
  ! colspan="2"| Field Name
−
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | rowspan="1"| 0x0D
+
  | rowspan="3"| 0x0F
−
  | rowspan="1"| Play
+
  | rowspan="3"| Configuration
−
  | rowspan="1"| Client
+
  | rowspan="3"| Client
−
  | Batch size
+
  | colspan="2"| Details Count
−
| VarInt
+
  | colspan="2"| {{Type|VarInt}} (32)
−
| Number of chunks.
+
  | The number of details in the following array.
−
  |}
 
−
 
 
−
==== Chunk Batch Start ====
 
−
 
 
−
Marks the start of a chunk batch. The Notchian client marks and stores the time it receives this packet.
 
−
 
 
−
{| class="wikitable" {{added}}
 
−
  ! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
 
  |-
 
  |-
−
  | 0x0E
+
  | rowspan="2"| Details
−
| Play
+
  | Title
−
  | Client
+
  | rowspan="2"| {{Type|Array}}
−
  | colspan="3"| ''no fields''
+
  | {{Type|String}} (128)
−
|}
+
  |
−
 
 
−
==== Login (play) ====
 
−
 
 
−
{{Need Info|Although the number of portal cooldown ticks is included in this packet, the whole portal usage process is still dictated entirely by the server. What kind of effect does this value have on the client, if any?}}
 
−
 
 
−
See [[Protocol Encryption]] for information on logging in.
 
−
 
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
  |-
 
−
| rowspan="26"| {{change|0x28|0x2A}}
 
−
  | rowspan="26"| Play
 
−
| rowspan="26"| Client
 
−
| Entity ID
 
−
| Int
 
−
| The player's Entity ID (EID).
 
 
  |-
 
  |-
−
  | Is hardcore
+
  | Description
−
  | Boolean
+
  | {{Type|String}} (4096)
 
  |
 
  |
−
|- {{removed}}
+
|}
−
| Game mode
 
−
| Unsigned Byte
 
−
| 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
 
−
|- {{removed}}
 
−
| Previous Game mode
 
−
| Byte
 
−
| -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
 
−
|-
 
−
| Dimension Count
 
−
| VarInt
 
−
| Size of the following array.
 
−
|-
 
−
| Dimension Names
 
−
| Array of Identifier
 
−
| Identifiers for all dimensions on the server.
 
−
|- {{removed}}
 
−
| Registry Codec
 
−
| [[NBT|NBT Tag Compound]]
 
−
| Represents certain registries that are sent from the server and are applied on the client.
 
−
|- {{removed}}
 
−
| Dimension Type
 
−
| Identifier
 
−
| Name of the dimension type being spawned into.
 
−
|- {{removed}}
 
−
| Dimension Name
 
−
| Identifier
 
−
| Name of the dimension being spawned into.
 
−
|- {{removed}}
 
−
| Hashed seed
 
−
| Long
 
−
| First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
 
−
|-
 
−
| Max Players
 
−
| VarInt
 
−
| Was once used by the client to draw the player list, but now is ignored.
 
−
|-
 
−
| View Distance
 
−
| VarInt
 
−
| Render distance (2-32).
 
−
|-
 
−
| Simulation Distance
 
−
| VarInt
 
−
| The distance that the client will process specific things, such as entities.
 
−
|-
 
−
| Reduced Debug Info
 
−
| Boolean
 
−
| If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}.  For servers in development, this should almost always be false.
 
−
|-
 
−
| Enable respawn screen
 
−
| Boolean
 
−
| Set to false when the doImmediateRespawn gamerule is true.
 
−
|- {{added}}
 
−
| Dimension Type
 
−
| Identifier
 
−
| Name of the dimension type being spawned into.
 
−
|- {{added}}
 
−
| Dimension Name
 
−
| Identifier
 
−
| Name of the dimension being spawned into.
 
−
|- {{added}}
 
−
| Hashed seed
 
−
| Long
 
−
| First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
 
−
|- {{added}}
 
−
| Game mode
 
−
| Unsigned Byte
 
−
| 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
 
−
|- {{added}}
 
−
| Previous Game mode
 
−
| Byte
 
−
| -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
 
−
|-
 
−
| Is Debug
 
−
| Boolean
 
−
| True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
 
−
|-
 
−
| Is Flat
 
−
| Boolean
 
−
| True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
 
−
|-
 
−
| Has death location
 
−
| Boolean
 
−
| If true, then the next two fields are present.
 
−
|-
 
−
| Death dimension name
 
−
| Optional Identifier
 
−
| Name of the dimension the player died in.
 
−
|-
 
−
| Death location
 
−
| Optional Position
 
−
| The location that the player died at.
 
−
|-
 
−
| Portal cooldown
 
−
| VarInt
 
−
| The number of ticks until the player can use the portal again.
 
−
|}
 
  
−
==== Respawn ====
+
==== Clientbound Server Links (configuration) ====
  
−
{{Need Info|Although the number of portal cooldown ticks is included in this packet, the whole portal usage process is still dictated entirely by the server. What kind of effect does this value have on the client, if any?}}
+
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).
  
−
To change the player's dimension (overworld/nether/end), send them a respawn packet with the appropriate dimension, followed by prechunks/chunks for the new dimension, and finally a position and look packet. You do not need to unload chunks, the client will do it automatically.
+
{| class="wikitable" {{added}}
−
 
 
−
{| class="wikitable"
 
 
  ! 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="12"| {{change|0x41|0x43}}
+
  | rowspan="4"| 0x10
−
  | rowspan="12"| Play
+
  | rowspan="4"| Configuration
−
  | rowspan="12"| Client
+
  | rowspan="4"| Client
−
  | Dimension Type
+
  | colspan="2"| Links Count
−
  | Identifier
+
  | colspan="2"| {{Type|VarInt}}
−
  | Valid dimensions are defined per dimension registry sent in [[#Login (play)|Login (play)]]
+
  | The number of links in the following array.
 
  |-
 
  |-
−
  | Dimension Name
+
  | rowspan="3"| Links
−
  | Identifier
+
| Is built-in
−
  | Name of the dimension being spawned into.
+
| rowspan="3"| {{Type|Array}}
 +
  | {{Type|Boolean}}
 +
  | Determines if the following label is built-in (from enum) or custom (text component).
 
  |-
 
  |-
−
  | Hashed seed
+
  | Label
−
  | Long
+
  | {{Type|VarInt}} {{Type|Enum}} / {{Type|Text Component}}
−
  | First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
+
  | See below.
 
  |-
 
  |-
−
  | Game mode
+
  | URL
−
  | Unsigned Byte
+
  | {{Type|String}}
−
| 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
+
  | Valid URL.
−
|-
+
|}
−
| Previous Game mode
 
−
| Byte
 
−
| -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
 
−
|-
 
−
| Is Debug
 
−
| Boolean
 
−
| True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
 
−
|-
 
−
| Is Flat
 
−
| Boolean
 
−
| True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
 
−
|- {{removed}}
 
−
| Data kept
 
−
| Byte
 
−
| Bit mask. 0x01: Keep attributes, 0x02: Keep metadata. Tells which data should be kept on the client side once the player has respawned.
 
−
In the Notchian implementation, this is context dependent:
 
−
* normal respawns (after death) keep no data;
 
−
* exiting the end poem/credits keeps the attributes;
 
−
* other dimension changes (portals or teleports) keep all data.
 
−
|-
 
−
| Has death location
 
−
| Boolean
 
−
| If true, then the next two fields are present.
 
−
|-
 
−
| Death dimension Name
 
−
| Optional Identifier
 
−
| Name of the dimension the player died in.
 
−
|-
 
−
| Death location
 
−
| Optional Position
 
−
| The location that the player died at.
 
−
|-
 
−
| Portal cooldown
 
−
| VarInt
 
−
| The number of ticks until the player can use the portal again.
 
−
|}
 
−
 
 
−
{{Warning2|Avoid changing player's dimension to same dimension they were already in unless they are dead. If you change the dimension to one they are already in, weird bugs can occur, such as the player being unable to attack other players in new world (until they die and respawn).
 
−
 
 
−
Before 1.16, if you must respawn a player in the same dimension without killing them, send two respawn packets, one to a different world and then another to the world you want. You do not need to complete the first respawn; it only matters that you send two packets.}}
 
−
 
 
−
==== Display Objective ====
 
−
 
 
−
This is sent to the client when it should display a scoreboard.
 
−
 
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
| rowspan="2"| {{change|0x51|0x53}}
 
−
| rowspan="2"| Play
 
−
| rowspan="2"| Client
 
−
| Position
 
−
| {{change|Byte|VarInt}}
 
−
  | The position of the scoreboard. 0: list, 1: sidebar, 2: below name, 3 - 18: team specific sidebar, indexed as 3 + team color.
 
−
|-
 
−
| Score Name
 
−
| String (32767)
 
−
| The unique name for the scoreboard to be displayed.
 
−
|}
 
−
 
 
−
==== Start Configuration ====
 
  
−
Sent during gameplay in order to redo the configuration process. The client must respond with [[#Configuration Acknowledged|Configuration Acknowledged]] for the process to start.
 
  
 
{| class="wikitable" {{added}}
 
{| class="wikitable" {{added}}
−
  ! Packet ID
+
  ! ID
−
  ! State
+
  ! Name
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | rowspan="1"| 0x65
+
  | 0
−
  | rowspan="1"| Play
+
  | Bug Report
−
  | rowspan="1"| Client
+
  | Displayed on connection error screen; included as a comment in the disconnection report.
−
| colspan="3"| ''no fields''
 
−
|}
 
−
 
 
−
This packet switches the connection state to [[#Configuration|configuration]].
 
−
 
 
−
==== Feature Flags ====
 
−
 
 
−
Used to enable and disable features, generally experimental ones, on the client.
 
−
 
 
−
{| class="wikitable" {{removed}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
 
  |-
 
  |-
−
  | rowspan="2"| 0x6B
+
  | 1
−
| rowspan="2"| Play
+
  | Community Guidelines
−
| rowspan="2"| Client
+
  |  
−
| Total Features
 
−
  | VarInt
 
−
  | Number of features that appear in the array below.
 
 
  |-
 
  |-
−
  | Feature Flags
+
  | 2
−
  | Identifier Array
+
  | Support
−
  |
+
  |  
−
|}
 
−
 
 
−
=== Serverbound ===
 
−
 
 
−
==== Chunk Batch Received ====
 
−
 
 
−
Notifies the server that the chunk batch has been received by the client. The server uses the value sent in this packet to adjust the number of chunks to be sent in a batch.
 
−
 
 
−
The Notchian server will stop sending further chunk data until the client acknowledges the sent chunk batch. After the first acknowledgement, the server adjusts this number to allow up to 10 unacknowledged batches.
 
−
 
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
 
  |-
 
  |-
−
  | rowspan="1"| 0x07
+
  | 3
−
| rowspan="1"| Play
+
  | Status
−
| rowspan="1"| Server
+
  |  
−
  | Chunks per tick
 
−
  | Float
 
−
| Desired chunks per tick.
 
−
|}
 
−
 
 
−
==== Configuration Acknowledged ====
 
−
 
 
−
Sent by the client upon receiving a [[#Start Configuration|Start Configuration]] packet from the server.
 
−
 
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
 
  |-
 
  |-
−
  | rowspan="1"| 0x0B
+
  | 4
−
| rowspan="1"| Play
+
  | Feedback
−
| rowspan="1"| Server
+
  |  
−
| colspan="3"| ''no fields''
 
−
|}
 
−
 
 
−
This packet switches the connection state to [[#Configuration|configuration]].
 
−
 
 
−
== Status ==
 
−
 
 
−
=== Clientbound ===
 
−
 
 
−
No changes so far.
 
−
 
 
−
=== Serverbound ===
 
−
 
 
−
No changes so far.
 
−
 
 
−
== Login ==
 
−
 
 
−
=== Clientbound ===
 
−
 
 
−
==== Login Success ====
 
−
 
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
  ! State
 
−
! Bound To
 
−
! colspan="2"| Field Name
 
−
  ! colspan="2"| Field Type
 
−
! Notes
 
 
  |-
 
  |-
−
  | rowspan="7"| 0x02
+
  | 5
−
| rowspan="7"| Login
+
  | Community
−
  | rowspan="7"| Client
+
  |  
−
  | colspan="2"| UUID
 
−
| colspan="2"| UUID
 
−
| colspan="2"|
 
 
  |-
 
  |-
−
  | colspan="2"| Username
+
  | 6
−
  | colspan="2"| String (16)
+
  | Website
−
  | colspan="2"|
+
  |  
 
  |-
 
  |-
−
  | colspan="2"| Number Of Properties
+
  | 7
−
  | colspan="2"| VarInt
+
  | Forums
−
  | Number of elements in the following array.
+
  |  
 
  |-
 
  |-
−
  | rowspan="4"| Property
+
  | 8
−
  | Name
+
  | News
−
  | rowspan="4"| Array
+
  |  
−
| String (32767)
 
−
| colspan="2"|
 
 
  |-
 
  |-
−
  | Value
+
  | 9
−
  | String (32767)
+
  | Announcements
−
  | colspan="1"|
+
  |  
−
|-
 
−
| Is Signed
 
−
| Boolean
 
−
| colspan="2"|
 
 
  |-
 
  |-
−
| Signature
 
−
| Optional String (32767)
 
−
| Only if Is Signed is true.
 
 
  |}
 
  |}
−
 
−
This packet switches the connection state to {{change|[[#Play|play]]|[[#Configuration|configuration]]}}.
 
  
 
=== Serverbound ===
 
=== Serverbound ===
  
−
==== Login Start  ====
+
No changes so far.
  
−
{| class="wikitable"
+
== Play ==
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
| rowspan="3"| 0x00
 
−
| rowspan="3"| Login
 
−
| rowspan="3"| Server
 
−
| Name
 
−
| String (16)
 
−
| Player's Username.
 
−
|- {{removed}}
 
−
| Has Player UUID
 
−
| Boolean
 
−
| Whether or not the next field should be sent.
 
−
|-
 
−
| Player UUID
 
−
| {{change|Optional}} UUID
 
−
| The UUID of the player logging in. {{change|Only sent if Has Player UUID is true.}}
 
−
|}
 
−
 
 
−
==== Login Acknowledged ====
 
−
 
 
−
Acknowledgement to the [[Protocol#Login_Success|Login Success]] packet sent by the server.
 
−
 
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
| 0x03
 
−
| Login
 
−
| Server
 
−
| colspan="3"| ''no fields''
 
−
|}
 
−
 
 
−
== Configuration ==
 
  
 
=== Clientbound ===
 
=== Clientbound ===
  
−
==== Plugin Message (configuration) ====
+
==== Clientbound Report Details (play) ====
−
 
 
−
{{Main|Plugin channels}}
 
−
 
 
−
Mods and plugins can use this to send their data. Minecraft itself uses several [[plugin channel]]s. These internal channels are in the <code>minecraft</code> namespace.
 
  
−
More information on how it works on [https://dinnerbone.com/blog/2012/01/13/minecraft-plugin-channels-messaging/ Dinnerbone's blog]. More documentation about internal and popular registered channels are [[plugin channel|here]].
+
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}}
 
{| class="wikitable" {{added}}
Line 737: Line 172:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
−
  ! Field Name
+
  ! colspan="2"| Field Name
−
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | rowspan="2"| 0x00
+
  | rowspan="3"| 0x7A
−
  | rowspan="2"| Configuration
+
  | rowspan="3"| Configuration
−
  | rowspan="2"| Client
+
  | rowspan="3"| Client
−
  | Channel
+
  | colspan="2"| Details Count
−
  | Identifier
+
  | colspan="2"| {{Type|VarInt}} (32)
−
  | Name of the [[plugin channel]] used to send the data.
+
  | The number of details in the following array.
 
  |-
 
  |-
−
| Data
+
  | rowspan="2"| Details
−
| Byte Array (1048576)
+
  | Title
−
| Any data. The length of this array must be inferred from the packet length.
+
  | rowspan="2"| {{Type|Array}}
−
|}
+
  | {{Type|String}} (128)
−
 
 
−
In Notchian client, the maximum data length is 1048576 bytes.
 
−
 
 
−
==== Disconnect (configuration) ====
 
−
 
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
| 0x01
 
−
| Configuration
 
−
| Client
 
−
| Reason
 
−
| [[Chat]]
 
−
| The reason why the player was disconnected.
 
−
|}
 
−
 
 
−
==== Finish Configuration ====
 
−
 
 
−
Sent by the server to notify the client that the configuration process has finished. The client answers with its own [[#Finish_Configuration_2|Finish Configuration]] whenever it is ready to continue.
 
−
 
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
  | rowspan="1"| 0x02
 
−
  | rowspan="1"| Configuration
 
−
  | rowspan="1"| Client
 
−
| colspan="3"| ''no fields''
 
−
|}
 
−
 
 
−
This packet switches the connection state to [[#Play|play]].
 
−
 
 
−
==== Keep Alive (configuration) ====
 
−
 
 
−
The server will frequently send out a keep-alive, each containing a random ID. The client must respond with the same payload (see [[#Keep Alive (configuration) 2|serverbound Keep Alive]]). 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.
 
−
 
 
−
The Notchian server uses a system-dependent time in milliseconds to generate the keep alive ID value.
 
−
 
 
−
{| class="wikitable" {{added}}
 
−
  ! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
| 0x03
 
−
| Configuration
 
−
| Client
 
−
| Keep Alive ID
 
−
| Long
 
 
  |
 
  |
−
|}
 
−
 
−
==== Ping (configuration) ====
 
−
 
−
Packet is not used by the Notchian server. When sent to the client, client responds with a [[#Pong (configuration)|Pong]] packet with the same id.
 
−
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
 
  |-
 
  |-
−
  | 0x04
+
  | Description
−
  | Configuration
+
  | {{Type|String}} (4096)
−
| Client
 
−
| ID
 
−
| Int
 
 
  |
 
  |
−
|}
+
|}
  
−
==== Registry Data ====
+
==== Clientbound Server Links (play) ====
  
−
Represents certain registries that are sent from the server and are applied on the client.
+
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}}
 
{| class="wikitable" {{added}}
Line 843: Line 202:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
−
  ! Field Name
+
  ! colspan="2"| Field Name
−
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | rowspan="1"| 0x05
+
  | rowspan="4"| 0x7B
−
  | rowspan="1"| Configuration
+
  | rowspan="4"| Configuration
−
  | rowspan="1"| Client
+
  | rowspan="4"| Client
−
  | Registry Codec
+
  | colspan="2"| Links Count
−
  | [[NBT|NBT Tag Compound]]
+
  | colspan="2"| {{Type|VarInt}}
−
| Information included below.
+
  | The number of links in the following array.
−
  |}
 
−
 
 
−
 
 
−
The '''Registry Codec''' NBT Tag Compound ([https://gist.github.com/rj00a/f2970a8ce4d09477ec8f16003b9dce86 Default value in JSON as of 1.19], [https://gist.github.com/nikes/aff59b758a807858da131a1881525b14 1.19.2], [https://pastebin.com/guryvw56 1.20.1]) includes three registries: "minecraft:dimension_type", "minecraft:worldgen/biome", and "minecraft:chat_type".
 
−
 
 
−
{| class="wikitable"
 
−
!Name
 
−
!Type
 
−
!style="width: 250px;" colspan="2"| Notes
 
 
  |-
 
  |-
−
  | minecraft:dimension_type
+
  | rowspan="3"| Links
−
  | TAG_Compound
+
| Is built-in
−
  | The dimension type registry (see below).
+
  | rowspan="3"| {{Type|Array}}
 +
  | {{Type|Boolean}}
 +
| Determines if the following label is built-in (from enum) or custom (text component).
 
  |-
 
  |-
−
  | minecraft:worldgen/biome
+
  | Label
−
  | TAG_Compound
+
  | {{Type|VarInt}} {{Type|Enum}} / {{Type|Text Component}}
−
  | The biome registry (see below).
+
  | See below.
 
  |-
 
  |-
−
  | minecraft:chat_type
+
  | URL
−
  | TAG_Compound
+
  | {{Type|String}}
−
  | The chat type registry (see below).
+
  | Valid URL.
−
|}
+
|}
  
−
Dimension type registry:
+
{| class="wikitable" {{added}}
−
 
+
  ! ID
−
{| class="wikitable"
 
−
!Name
 
−
!Type
 
−
!style="width: 250px;" colspan="2"| Notes
 
−
|-
 
−
| type
 
−
| TAG_String
 
−
| The name of the registry. Always "minecraft:dimension_type".
 
−
|-
 
−
| value
 
−
| TAG_List
 
−
| List of dimension types registry entries (see below).
 
−
|}
 
−
 
 
−
Dimension type registry entry:
 
−
 
 
−
{| class="wikitable"
 
−
!Name
 
−
  !Type
 
−
!style="width: 250px;" colspan="2"| Notes
 
−
|-
 
−
| name
 
−
| TAG_String
 
−
| The name of the dimension type (for example, "minecraft:overworld").
 
−
|-
 
−
| id
 
−
| TAG_Int
 
−
| The protocol ID of the dimension (matches the index of the element in the registry list).
 
−
|-
 
−
| element
 
−
| TAG_Compound
 
−
| The dimension type (see below).
 
−
|}
 
−
 
 
−
Dimension type:
 
−
 
 
−
{| class="wikitable"
 
 
  ! Name
 
  ! Name
−
  ! Type
+
  ! Notes
−
!style="width: 250px;" colspan="2"| Meaning
 
−
! Values
 
 
  |-
 
  |-
−
  | piglin_safe
+
  | 0
−
| TAG_Byte
+
  | Bug Report
−
  | colspan="2"| Whether piglins shake and transform to zombified piglins.
+
  | Displayed on connection error screen; included as a comment in the disconnection report.
−
  | 1: true, 0: false.
 
 
  |-
 
  |-
−
  | has_raids
+
  | 1
−
| TAG_Byte
+
  | Community Guidelines
−
  | colspan="2"| Whether players with the Bad Omen effect can cause a raid.
+
  |  
−
  | 1: true, 0: false.
 
 
  |-
 
  |-
−
  | monster_spawn_light_level
+
  | 2
−
| TAG_Int or TAG_Compound
+
  | Support
−
  | Possibly the light level(s) at which monsters can spawn.
+
  |  
−
  | colspan="2"| When TAG_Int, 0 - 15. When TAG_Compound, contains the fields: type (TAG_String), appears to be always "minecraft:uniform", and value (TAG_Compound), which contains the fields: max_inclusive (TAG_Int), min_inclusive (TAG_Int).
 
 
  |-
 
  |-
−
  | monster_spawn_block_light_limit
+
  | 3
−
  | TAG_Int
+
  | Status
−
| colspan="2"|
+
  |  
−
  |
 
 
  |-
 
  |-
−
  | natural
+
  | 4
−
  | TAG_Byte
+
  | Feedback
−
  | colspan="2"| When false, compasses spin randomly. When true, nether portals can spawn zombified piglins.
+
  |  
−
| 1: true, 0: false.
 
 
  |-
 
  |-
−
  | ambient_light
+
  | 5
−
  | TAG_Float
+
  | Community
−
  | colspan="2"| How much light the dimension has.
+
  |  
−
| 0.0 to 1.0.
 
 
  |-
 
  |-
−
  | fixed_time
+
  | 6
−
  | Optional TAG_Long
+
  | Website
−
  | colspan="2"| If set, the time of the day is the specified value.
+
  |  
−
| If set, 0 to 24000.
 
 
  |-
 
  |-
−
  | infiniburn
+
  | 7
−
  | TAG_String
+
  | Forums
−
  | colspan="2"| A resource location defining what block tag to use for infiniburn.
+
  |  
−
| "#" or minecraft resource "#minecraft:...".
 
−
|-
 
−
| respawn_anchor_works
 
−
| TAG_Byte
 
−
| colspan="2"| Whether players can charge and use respawn anchors.
 
−
| 1: true, 0: false.
 
−
|-
 
−
| has_skylight
 
−
| TAG_Byte
 
−
| colspan="2"| Whether the dimension has skylight access or not.
 
−
| 1: true, 0: false.
 
−
|-
 
−
| bed_works
 
−
| TAG_Byte
 
−
| colspan="2"| Whether players can use a bed to sleep.
 
−
| 1: true, 0: false.
 
−
|-
 
−
| effects
 
−
| TAG_String
 
−
| colspan="2"| ?
 
−
| "minecraft:overworld", "minecraft:the_nether", "minecraft:the_end" or something else.
 
−
|-
 
−
| min_y
 
−
| TAG_Int
 
−
| colspan="2"| The minimum Y level.
 
−
| A multiple of 16. Example: -64
 
−
|-
 
−
| height
 
−
| TAG_Int
 
−
| colspan="2"| The maximum height.
 
−
| A multiple of 16. Example: 256
 
−
|-
 
−
| logical_height
 
−
| TAG_Int
 
−
| colspan="2"| The maximum height to which chorus fruits and nether portals can bring players within this dimension. (Must be lower than height)
 
−
| 0-384.
 
−
|-
 
−
| coordinate_scale
 
−
| TAG_Double
 
−
| colspan="2"| The multiplier applied to coordinates when traveling to the dimension.
 
−
| 0.00001 - 30000000.0
 
−
|-
 
−
| ultrawarm
 
−
| TAG_Byte
 
−
| colspan="2"| Whether the dimensions behaves like the nether (water evaporates and sponges dry) or not. Also causes lava to spread thinner.
 
−
| 1: true, 0: false.
 
−
|-
 
−
| has_ceiling
 
−
| TAG_Byte
 
−
| colspan="2"| Whether the dimension has a bedrock ceiling or not. When true, causes lava to spread faster.
 
−
| 1: true, 0: false.
 
−
|}
 
−
 
 
−
Biome registry:
 
−
 
 
−
{| class="wikitable"
 
−
!Name
 
−
!Type
 
−
!style="width: 250px;" colspan="2"| Notes
 
−
|-
 
−
| type
 
−
| TAG_String
 
−
| The name of the registry. Always "minecraft:worldgen/biome".
 
−
|-
 
−
| value
 
−
| TAG_List
 
−
| List of biome registry entries (see below).
 
−
|}
 
−
 
 
−
Biome registry entry:
 
−
 
 
−
{| class="wikitable"
 
−
!Name
 
−
!Type
 
−
!style="width: 250px;" colspan="2"| Notes
 
−
|-
 
−
| name
 
−
| TAG_String
 
−
| The name of the biome (for example, "minecraft:ocean").
 
−
|-
 
−
| id
 
−
| TAG_Int
 
−
| The protocol ID of the biome (matches the index of the element in the registry list).
 
−
|-
 
−
| element
 
−
| TAG_Compound
 
−
| The biome properties (see below).
 
−
|}
 
−
 
 
−
Biome properties:
 
−
 
 
−
{| class="wikitable"
 
−
! colspan="3"|Name
 
−
! colspan="2"|Type
 
−
!style="width: 250px;" colspan="2"| Meaning
 
−
! colspan="2"|Values
 
−
|-
 
−
| colspan="3"|has_precipitation
 
−
| colspan="2"|TAG_Byte
 
−
| colspan="2"| Determines whether or not the biome has precipitation.
 
−
| colspan="2"| 1: true, 0: false.
 
−
|-
 
−
| colspan="3"| depth
 
−
| colspan="2"| Optional TAG_Float
 
−
| colspan="2"| The depth factor of the biome.
 
−
| colspan="2"| The default values vary between 1.5 and -1.8.
 
−
|-
 
−
| colspan="3"| temperature
 
−
| colspan="2"| TAG_Float
 
−
| colspan="2"| The temperature factor of the biome.
 
−
| colspan="2"| The default values vary between 2.0 and -0.5.
 
−
|-
 
−
| colspan="3"| scale
 
−
| colspan="2"| Optional TAG_Float
 
−
| colspan="2"| ?
 
−
| colspan="2"| The default values vary between 1.225 and 0.0.
 
−
|-
 
−
| colspan="3"| downfall
 
−
| colspan="2"| TAG_Float
 
−
| colspan="2"| ?
 
−
| colspan="2"| The default values vary between 1.0 and 0.0.
 
−
|-
 
−
| colspan="3"| category
 
−
| colspan="2"| Optional TAG_String
 
−
| colspan="2"| The category of the biome.
 
−
| colspan="2"| Known values are "ocean", "plains", "desert", "forest", "extreme_hills", "taiga", "swamp", "river", "nether", "the_end", "icy", "mushroom", "beach", "jungle", "mesa", "savanna", and "none".
 
−
|-
 
−
| colspan="3"| temperature_modifier
 
−
| colspan="2"| Optional TAG_String
 
−
| colspan="2"| ?
 
−
| colspan="2"| The only known value is "frozen".
 
−
|-
 
−
| rowspan="13"| effects
 
−
| colspan="2"| sky_color
 
−
| rowspan="11"| TAG_Compound
 
−
| TAG_Int
 
−
| colspan="2"| The color of the sky.
 
−
| Example: 8364543, which is #7FA1FF in RGB.
 
−
|-
 
−
| colspan="2"| water_fog_color
 
−
| TAG_Int
 
−
| colspan="2"| Possibly the tint color when swimming.
 
−
| Example: 8364543, which is #7FA1FF in RGB.
 
−
|-
 
−
| colspan="2"| fog_color
 
−
| TAG_Int
 
−
| colspan="2"| Possibly the color of the fog effect when looking past the view distance.
 
−
| Example: 8364543, which is #7FA1FF in RGB.
 
−
|-
 
−
| colspan="2"| water_color
 
−
| TAG_Int
 
−
| colspan="2"| The tint color of the water blocks.
 
−
| Example: 8364543, which is #7FA1FF in RGB.
 
−
|-
 
−
| colspan="2"| foliage_color
 
−
| Optional TAG_Int
 
−
| colspan="2"| The tint color of the grass.
 
−
| Example: 8364543, which is #7FA1FF in RGB.
 
−
|-
 
−
| colspan="2"| grass_color
 
−
| Optional TAG_Int
 
−
| colspan="2"| ?
 
−
| Example: 8364543, which is #7FA1FF in RGB.
 
−
|-
 
−
| colspan="2"| grass_color_modifier
 
−
| Optional TAG_String
 
−
| colspan="2"| Unknown, likely affects foliage color.
 
−
| If set, known values are "swamp" and "dark_forest".
 
−
|-
 
−
| colspan="2"| music
 
−
| Optional TAG_Compound
 
−
| colspan="2"| Music properties for the biome.
 
−
| If present, contains the fields: replace_current_music (TAG_Byte), sound (TAG_String), max_delay (TAG_Int), min_delay (TAG_Int).
 
 
  |-
 
  |-
−
  | colspan="2"| ambient_sound
+
  | 8
−
| Optional TAG_String
+
  | News
−
| colspan="2"| Ambient soundtrack.
 
−
| If present, the ID of a soundtrack. Example: "minecraft:ambient.basalt_deltas.loop".
 
−
|-
 
−
| colspan="2"| additions_sound
 
−
| Optional TAG_Compound
 
−
| colspan="2"| Additional ambient sound that plays randomly.
 
−
| If present, contains the fields: sound (TAG_String), tick_chance (TAG_Double).
 
−
|-
 
−
| colspan="2"| mood_sound
 
−
| Optional TAG_Compound
 
−
| colspan="2"| Additional ambient sound that plays at an interval.
 
−
| If present, contains the fields: sound (TAG_String), tick_delay (TAG_Int), offset (TAG_Double), block_search_extent (TAG_Int).
 
−
|-
 
−
| rowspan="2"| particle
 
−
| probability
 
−
| rowspan="2"| Optional TAG_Compound
 
−
| TAG_FLOAT
 
−
| rowspan="2"| Particles that appear randomly in the biome.
 
−
| Possibly the probability of spawning the particle.
 
−
| ?
 
−
|-
 
−
| options
 
−
| TAG_COMPOUND
 
−
| The properties of the particle to spawn.
 
−
| Contains the field "type" (TAG_String), which identifies the particle type.
 
−
|}
 
−
 
 
−
Chat registry:
 
−
 
 
−
{| class="wikitable"
 
−
!Name
 
−
!Type
 
−
!style="width: 250px;" colspan="2"| Notes
 
−
|-
 
−
| type
 
−
| TAG_String
 
−
| The name of the registry. Always "minecraft:chat_type".
 
−
|-
 
−
| value
 
−
| TAG_List
 
−
| List of chat type registry entries (see below).
 
−
|}
 
−
 
 
−
Chat type:
 
−
 
 
−
{| class="wikitable"
 
−
!Name
 
−
!Type
 
−
!style="width: 250px;" colspan="2"| Notes
 
−
|-
 
−
| name
 
−
| TAG_String
 
−
| The type's name (eg "minecraft:chat")
 
−
|-
 
−
| id
 
−
  | TAG_Int
 
 
  |  
 
  |  
 
  |-
 
  |-
−
  | elements
+
  | 9
−
  | TAG_Compound
+
  | Announcements
−
| "chat" and "narration" TAG_Compound's (see below)
 
−
|}
 
−
 
 
−
Chat type "chat" and "narration":
 
−
 
 
−
{| class="wikitable"
 
−
!Name
 
−
!Type
 
−
!style="width: 250px;" colspan="2"| Notes
 
−
|-
 
−
| translation_key
 
−
| TAG_String
 
 
  |  
 
  |  
 
  |-
 
  |-
−
| style
 
−
| TAG_Compound
 
−
| Similar to Chat JSON (only present in "chat" TAG_Compound)
 
−
|-
 
−
| parameters
 
−
| TAG_List of TAG_String
 
−
| Values can be "sender", "target" and "content"
 
−
|}
 
−
 
−
==== Resource Pack ====
 
−
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
| rowspan="5"| 0x06
 
−
| rowspan="5"| Configuration
 
−
| rowspan="5"| Client
 
−
| URL
 
−
| String (32767)
 
−
| The URL to the resource pack.
 
−
|-
 
−
| Hash
 
−
| String (40)
 
−
| A 40 character hexadecimal and lowercase [[wikipedia:SHA-1|SHA-1]] hash of the resource pack file.<br />If it's not a 40 character hexadecimal string, the client will not use it for hash verification and likely waste bandwidth — but it will still treat it as a unique id
 
−
|-
 
−
| Forced
 
−
| Boolean
 
−
| The notchian client will be forced to use the resource pack from the server. If they decline they will be kicked from the server.
 
−
|-
 
−
| Has Prompt Message
 
−
| Boolean
 
−
| <code>true</code> If the next field will be sent <code>false</code> otherwise. When <code>false</code>, this is the end of the packet
 
−
|-
 
−
| Prompt Message
 
−
| Optional [[Chat]]
 
−
| This is shown in the prompt making the client accept or decline the resource pack.
 
−
|}
 
−
 
−
==== Feature Flags ====
 
−
 
−
Used to enable and disable features, generally experimental ones, on the client.
 
−
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
| rowspan="2"| 0x07
 
−
| rowspan="2"| Configuration
 
−
| rowspan="2"| Client
 
−
| Total Features
 
−
| VarInt
 
−
| Number of features that appear in the array below.
 
−
|-
 
−
| Feature Flags
 
−
| Identifier Array
 
−
|
 
 
  |}
 
  |}
−
 
−
As of 23w31a, the following feature flags are available:
 
−
 
−
* minecraft:vanilla - enables vanilla features</li>
 
−
* minecraft:bundle - enables support for the bundle</li>
 
−
* minecraft:trade_rebalance - enables support for the rebalanced villager trades</li>
 
−
 
−
==== Update Tags ====
 
−
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! colspan="2"| Field Name
 
−
! colspan="2"| Field Type
 
−
! Notes
 
−
|-
 
−
| rowspan="3"| 0x08
 
−
| rowspan="3"| Configuration
 
−
| rowspan="3"| Client
 
−
| colspan="2"| Length of the array
 
−
| colspan="2"| VarInt
 
−
|
 
−
|-
 
−
| rowspan="2"| Array of tags
 
−
| Tag type
 
−
| rowspan="2"| Array
 
−
| Identifier
 
−
| Tag identifier (Vanilla required tags are <code>minecraft:block</code>, <code>minecraft:item</code>, <code>minecraft:fluid</code>, <code>minecraft:entity_type</code>, and <code>minecraft:game_event</code>)
 
−
|-
 
−
| Array of Tag
 
−
| (See below)
 
−
|
 
−
|}
 
−
 
−
Tags look like:
 
−
 
−
{| class="wikitable"
 
−
! colspan="2"| Field Name
 
−
! colspan="2"| Field Type
 
−
! Notes
 
−
|-
 
−
| colspan="2"| Length
 
−
| colspan="2"| VarInt
 
−
| Number of elements in the following array
 
−
|-
 
−
| rowspan="3"| Tags
 
−
| Tag name
 
−
| rowspan="3"| Array
 
−
| Identifier
 
−
|
 
−
|-
 
−
| Count
 
−
| VarInt
 
−
| Number of elements in the following array
 
−
|-
 
−
| Entries
 
−
| Array of VarInt
 
−
| Numeric ID of the given type (block, item, etc.).
 
−
|}
 
−
 
−
More information on tags is available at: https://minecraft.gamepedia.com/Tag
 
−
 
−
And a list of all tags is here: https://minecraft.gamepedia.com/Tag#List_of_tags
 
  
 
=== Serverbound ===
 
=== Serverbound ===
  
−
==== Plugin Message (configuration) ====
+
No changes so far.
−
 
 
−
{{Main|Plugin channels}}
 
−
 
 
−
Mods and plugins can use this to send their data. Minecraft itself uses some [[plugin channel]]s. These internal channels are in the <code>minecraft</code> namespace.
 
−
 
 
−
More documentation on this: [https://dinnerbone.com/blog/2012/01/13/minecraft-plugin-channels-messaging/ https://dinnerbone.com/blog/2012/01/13/minecraft-plugin-channels-messaging/]
 
−
 
 
−
Note that the length of Data is known only from the packet length, since the packet has no length field of any kind.
 
−
 
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
| rowspan="2"| 0x00
 
−
| rowspan="2"| Configuration
 
−
| rowspan="2"| Server
 
−
| Channel
 
−
| Identifier
 
−
| Name of the [[plugin channel]] used to send the data.
 
−
|-
 
−
| Data
 
−
| Byte Array (32767)
 
−
| Any data, depending on the channel. <code>minecraft:</code> channels are documented [[plugin channel|here]]. The length of this array must be inferred from the packet length.
 
−
|}
 
−
 
 
−
In Notchian server, the maximum data length is 32767 bytes.
 
−
 
 
−
==== Finish Configuration ====
 
−
 
 
−
Sent by the client to notify the client that the configuration process has finished. It is sent in response to the server's [[#Finish_Configuration|Finish Configuration]].
 
−
 
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
| rowspan="1"| 0x01
 
−
| rowspan="1"| Configuration
 
−
| rowspan="1"| Server
 
−
| colspan="3"| ''no fields''
 
−
|}
 
−
 
 
−
This packet switches the connection state to [[#Play|play]].
 
−
 
 
−
==== Keep Alive (configuration) ====
 
−
 
 
−
The server will frequently send out a keep-alive (see [[#Keep Alive (configuration)|clientbound Keep Alive]]), each containing a random ID. The client must respond with the same packet.
 
−
 
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
| 0x02
 
−
| Configuration
 
−
| Server
 
−
| Keep Alive ID
 
−
| Long
 
−
|
 
−
|}
 
−
 
 
−
==== Pong (configuration) ====
 
−
 
 
−
Response to the clientbound packet ([[#Ping (configuration)|Ping]]) with the same id.
 
−
 
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
| 0x03
 
−
| Configuration
 
−
| Server
 
−
| ID
 
−
| Int
 
−
| id is the same as the ping packet
 
−
|}
 
−
 
 
−
==== Resource Pack (configuration) ====
 
−
 
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
| 0x04
 
−
| Configuration
 
−
| Server
 
−
| Result
 
−
| VarInt Enum
 
−
| 0: successfully loaded, 1: declined, 2: failed download, 3: accepted.
 
−
|}
 
−
 
 
  
 
[[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"