Difference between revisions of "Pre-release protocol"

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(→‎Clientbound: removed merged packets)
(Updated to 1.21-pre2)
 
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−
{{Box
+
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.
−
  |BORDER = #FF9999
 
−
  |BACKGROUND = #FFCC99
 
−
  |WIDTH = 100%
 
−
  |ICON =
 
−
  |HEADING = Under construction
 
−
  |CONTENT = In light of the recent release of Minecraft 1.9, this article still contains some changes between 1.8.9 and 1.9, which are currently being merged into [[Protocol]]. If you want to contribute, please coordinate with us in [irc://irc.freenode.net/mcdevs #mcdevs], and ping [[User:Fenhl|Fenhl]] before making any edits.
 
−
}}
 
−
 
 
−
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.9, protocol 107]]) to the current pre-release (currently [[Protocol version numbers|1.9, protocol 107]]). 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 18: Line 9:
 
=== Data types ===
 
=== Data types ===
  
−
No changes so far.
+
No changes documented so far.
  
 
=== Packets ===
 
=== Packets ===
Line 25: Line 16:
 
  ! ID
 
  ! ID
 
  ! Packet name
 
  ! Packet name
−
  ! colspan=2 | Documentation
+
  !colspan="2"| Documentation
 
  |-
 
  |-
−
  ! colspan=4 | Play clientbound
+
  !colspan="4"| Configuration clientbound
−
{{PacketList|0x25|Entity Relative Move}}
+
{{PacketList|0x0F|Clientbound Report Details (configuration)|rel=added}}
−
{{PacketList|0x26|Entity Look And Relative Move}}
+
{{PacketList|0x10|Clientbound Server Links (configuration)|rel=added}}
−
{{PacketList|0x3A|Attach Entity}}
 
−
{{PacketList|0x47|Sound Effect}}
 
−
{{PacketList|0x4A|Entity Teleport}}
 
−
{{PacketList|0x4B|Entity Properties}}
 
−
{{PacketList|0x4C|Entity Effect}}
 
 
  |-
 
  |-
−
  ! colspan=4 | Play serverbound
+
  !colspan="4"| Play clientbound
−
{{PacketList|0x00|Teleport Confirm|rel=added}}
+
{{PacketList|0x7A|Clientbound Report Details (play)|rel=added}}
−
{{PacketList|{{Change|0x14|0x01}}|Tab-Complete|rel=Tab-Complete 2}}
+
{{PacketList|0x7B|Clientbound Server Links (play)|rel=added}}
−
{{PacketList|{{Change|0x01|0x02}}|Chat Message|rel=Chat Message 2|pre=unchanged}}
 
−
{{PacketList|{{Change|0x16|0x03}}|Client Status}}
 
−
{{PacketList|{{Change|0x15|0x04}}|Client Settings}}
 
−
{{PacketList|{{Change|0x0F|0x05}}|Confirm Transaction|rel=Confirm Transaction 2|pre=unchanged}}
 
−
{{PacketList|{{Change|0x11|0x06}}|Enchant Item|pre=unchanged}}
 
−
{{PacketList|{{Change|0x0E|0x07}}|Click Window|pre=unchanged}}
 
−
{{PacketList|{{Change|0x0D|0x08}}|Close Window|rel=Close Window 2|pre=unchanged}}
 
−
{{PacketList|{{Change|0x17|0x09}}|Plugin Message|rel=Plugin Message 2|pre=unchanged}}
 
−
{{PacketList|{{Change|0x02|0x0A}}|Use Entity}}
 
−
{{PacketList|{{Change|0x00|0x0B}}|Keep Alive|rel=Keep Alive 2|pre=unchanged}}
 
−
{{PacketList|{{Change|0x04|0x0C}}|Player Position|pre=unchanged}}
 
−
{{PacketList|{{Change|0x06|0x0D}}|Player Position And Look|rel=Player Position And Look 2|pre=unchanged}}
 
−
{{PacketList|{{Change|0x05|0x0E}}|Player Look|pre=unchanged}}
 
−
{{PacketList|{{Change|0x03|0x0F}}|Player|pre=unchanged}}
 
−
{{PacketList|0x10|Vehicle Move (serverbound)|rel=added}}
 
−
{{PacketList|0x11|Steer Boat|rel=added}}
 
−
{{PacketList|{{Change|0x13|0x12}}|Player Abilities|rel=Player Abilities 2|pre=unchanged}}
 
−
{{PacketList|{{Change|0x07|0x13}}|Player Digging}}
 
−
{{PacketList|{{Change|0x0B|0x14}}|Entity Action}}
 
−
{{PacketList|{{Change|0x0C|0x15}}|Steer Vehicle|pre=unchanged}}
 
−
{{PacketList|{{Change|0x19|0x16}}|Resource Pack Status|pre=unchanged}}
 
−
{{PacketList|{{Change|0x09|0x17}}|Held Item Change|rel=Held Item Change 2|pre=unchanged}}
 
−
{{PacketList|{{Change|0x10|0x18}}|Creative Inventory Action|pre=unchanged}}
 
−
{{PacketList|{{Change|0x12|0x19}}|Update Sign|rel=Update Sign 2}}
 
−
{{PacketList|{{Change|0x0A|0x1A}}|Animation|rel=Animation 2}}
 
−
{{PacketList|{{Change|0x18|0x1B}}|Spectate|pre=unchanged}}
 
−
{{PacketList|{{Change|0x08|0x1C}}|Player Block Placement}}
 
−
{{PacketList|0x1D|Use Item|rel=added}}
 
 
  |-
 
  |-
−
! colspan=4 | Status clientbound
+
|}
−
{{PacketList|0x00|Response|pre=unchanged}}
 
−
{{PacketList|0x01|Pong|pre=unchanged}}
 
−
|-
 
−
! colspan=4 | Status serverbound
 
−
{{PacketList|0x00|Request|pre=unchanged}}
 
−
{{PacketList|0x01|Ping|pre=unchanged}}
 
−
|-
 
−
! colspan=4 | Login clientbound
 
−
{{PacketList|0x00|Disconnect|rel=Disconnect 2|pre=unchanged}}
 
−
{{PacketList|0x01|Encryption Request|pre=unchanged}}
 
−
{{PacketList|0x02|Login Success|pre=unchanged}}
 
−
{{PacketList|0x03|Set Compression|rel=Set Compression 2|pre=unchanged}}
 
−
|-
 
−
! colspan=4 | Login serverbound
 
−
{{PacketList|0x00|Login Start|pre=unchanged}}
 
−
{{PacketList|0x01|Encryption Response|pre=unchanged}}
 
−
|}
 
  
−
== New/modified data types ==
+
== Handshake ==
  
−
None so far.
+
No changes so far.
  
−
== Handshaking ==
+
== Status ==
−
 
 
−
=== Clientbound ===
 
  
 
No changes so far.
 
No changes so far.
  
−
=== Serverbound ===
+
== Login ==
  
 
No changes so far.
 
No changes so far.
  
−
== Play ==
+
== Configuration ==
  
 
=== Clientbound ===
 
=== Clientbound ===
  
−
==== Entity Relative Move ====
+
==== Clientbound Report Details (configuration) ====
−
 
 
−
This packet is sent by the server when an entity moves less then 1024 blocks; if an entity moves more than 1024 blocks [[#Entity Teleport|Entity Teleport]] should be sent instead.
 
−
 
 
−
This packet allows at most 1024 blocks movement in any direction, because short range is from -32768 to -32767.
 
  
 +
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="5"| {{Change|0x15|0x25}}
+
  | rowspan="3"| 0x0F
−
  |rowspan="5"| Play
+
  | rowspan="3"| Configuration
−
  |rowspan="5"| Client
+
  | rowspan="3"| Client
−
  | Entity ID
+
  | colspan="2"| Details Count
−
| VarInt
+
  | colspan="2"| {{Type|VarInt}} (32)
−
  |  
+
  | The number of details in the following array.
−
|-
 
−
| Delta X
 
−
| {{Change|Byte|Short}}
 
−
  | Change in X position as {{Change|a [[Data Types#Fixed-point numbers|Fixed-Point number]]|(currentX * 32 - prevX * 32) * 128}}
 
 
  |-
 
  |-
−
  | Delta Y
+
  | rowspan="2"| Details
−
  | {{Change|Byte|Short}}
+
  | Title
−
  | Change in Y position as {{Change|a [[Data Types#Fixed-point numbers|Fixed-Point number]]|(currentY * 32 - prevY * 32) * 128}}
+
| rowspan="2"| {{Type|Array}}
 +
  | {{Type|String}} (128)
 +
|
 
  |-
 
  |-
−
  | Delta Z
+
  | Description
−
  | {{Change|Byte|Short}}
+
  | {{Type|String}} (4096)
−
| Change in Z position as {{Change|a [[Data Types#Fixed-point numbers|Fixed-Point number]]|(currentZ * 32 - prevZ * 32) * 128}}
+
  |
−
  |-
+
|}
−
| On Ground
 
−
| Boolean
 
−
|
 
−
|}
 
  
−
==== Entity Look And Relative Move ====
+
==== Clientbound Server Links (configuration) ====
  
−
This packet is sent by the server when an entity rotates and moves. Since a short range is limited from -32768 to 32767, and movement is offset of fixed-point numbers, this packet allows at most 1024 blocks movement in any direction. (-32768/32 == -1024)
+
This packet contains a list of links that the Notchian client will display in the menu available from the pause menu. Link labels can be built-in or custom (i.e., any text).
  
−
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
−
  ! Field Name
+
  ! colspan="2"| Field Name
−
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  |rowspan="7"| {{Change|0x17|0x26}}
+
  | rowspan="4"| 0x10
−
  |rowspan="7"| Play
+
  | rowspan="4"| Configuration
−
  |rowspan="7"| Client
+
  | rowspan="4"| Client
−
  | Entity ID
+
  | colspan="2"| Links Count
−
| VarInt
+
  | colspan="2"| {{Type|VarInt}}
−
  |  
+
  | The number of links in the following array.
−
|-
 
−
| Delta X
 
−
| {{Change|Byte|Short}}
 
−
  | Change in X position as {{Change|a [[Data Types#Fixed-point numbers|Fixed-Point number]]|(currentX * 32 - prevX * 32) * 128}}
 
 
  |-
 
  |-
−
  | Delta Y
+
  | rowspan="3"| Links
−
  | {{Change|Byte|Short}}
+
| Is built-in
−
  | Change in Y position as {{Change|a [[Data Types#Fixed-point numbers|Fixed-Point number]]|(currentY * 32 - prevY * 32) * 128}}
+
  | rowspan="3"| {{Type|Array}}
 +
  | {{Type|Boolean}}
 +
| Determines if the following label is built-in (from enum) or custom (text component).
 
  |-
 
  |-
−
  | Delta Z
+
  | Label
−
  | {{Change|Byte|Short}}
+
  | {{Type|VarInt}} {{Type|Enum}} / {{Type|Text Component}}
−
| Change in Z position as {{Change|a [[Data Types#Fixed-point numbers|Fixed-Point number]]|(currentZ * 32 - prevZ * 32) * 128}}
+
| See below.
 
  |-
 
  |-
−
  | Yaw
+
  | URL
−
  | Angle
+
  | {{Type|String}}
−
| New angle, not a delta
+
  | Valid URL.
−
|-
+
|}
−
| Pitch
 
−
| Angle
 
−
| New angle, not a delta
 
−
|-
 
−
| On Ground
 
−
| Boolean
 
−
  |  
 
−
|}
 
  
−
==== Attach Entity ====
 
  
−
This packet is sent when a player has been attached to an entity (e.g. Minecart).
+
{| class="wikitable" {{added}}
−
 
+
  ! ID
−
{| class="wikitable"
+
  ! Name
−
  ! Packet ID
 
−
  ! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
 
  ! Notes
 
  ! Notes
−
|-
 
−
|rowspan="3"| {{change|0x1B|0x3A}}
 
−
|rowspan="3"| Play
 
−
|rowspan="3"| Client
 
−
| Entity ID
 
−
| Int
 
−
| Attached entity's EID
 
−
|-
 
−
| Vehicle ID
 
−
| Int
 
−
| Vechicle's Entity ID. Set to -1 to detach
 
−
|-style="background-color: #f4cccc; text-decoration: line-through;"
 
−
| Leash
 
−
| Boolean
 
−
| If true leashes the entity to the vehicle
 
−
|}
 
−
 
−
=== Serverbound ===
 
−
 
−
==== {{Change||Teleport Confirm}} ====
 
−
 
−
Sent by client as confirmation of [[#Player Position And Look|Player Position And Look]] packet.
 
−
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
|rowspan="1"| 0x00
 
−
|rowspan="1"| Play
 
−
|rowspan="1"| Server
 
−
| Teleport ID
 
−
| VarInt
 
−
|
 
−
|}
 
−
 
−
==== Tab-Complete ====
 
−
 
−
Sent when the user presses ''tab'' while writing text.
 
−
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
|rowspan="4"| {{Change|0x14|0x01}}
 
−
|rowspan="4"| Play
 
−
|rowspan="4"| Server
 
−
| Text
 
−
| String
 
−
| All text behind the cursor (e.g. to the left of the cursor in left-to-right languages like English)
 
−
|- style="background-color: #d9ead3;"
 
−
| Assume Command
 
−
| Boolean
 
−
| If true, the server will parse Text as a command even if it doesn't start with a <code>/</code>. Used in the command block GUI.
 
−
|-
 
−
| Has Position
 
−
| Boolean
 
−
|
 
−
|-
 
−
| Looked At Block
 
−
| Optional Position
 
−
| The position of the block being looked at. Only sent if Has Position is true.
 
−
|}
 
−
 
−
==== Client Status ====
 
−
 
−
Sent when the client is ready to complete login and when the client is ready to respawn after death.
 
−
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
|rowspan="1"| {{Change|0x16|0x03}}
 
−
|rowspan="1"| Play
 
−
|rowspan="1"| Server
 
−
| Action ID
 
−
| VarInt Enum
 
−
| See below
 
−
|}
 
−
 
−
''Action ID'' values:
 
−
 
−
{| class="wikitable"
 
−
|-
 
−
! Action ID
 
−
! Action
 
 
  |-
 
  |-
 
  | 0
 
  | 0
−
  | Perform respawn
+
  | Bug Report
 +
| Displayed on connection error screen; included as a comment in the disconnection report.
 
  |-
 
  |-
 
  | 1
 
  | 1
−
  | Request stats
+
  | Community Guidelines
 +
|
 
  |-
 
  |-
 
  | 2
 
  | 2
−
  | {{Change|''Taking Inventory'' achievement|Open Inventory}}
+
  | Support
−
  |}
+
  |  
−
 
 
−
==== Client Settings ====
 
−
 
 
−
Sent when the player connects, or when settings are changed.
 
−
 
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
 
  |-
 
  |-
−
  |rowspan="6"| {{Change|0x15|0x04}}
+
  | 3
−
|rowspan="6"| Play
+
  | Status
−
|rowspan="6"| Server
+
  |  
−
| Locale
 
−
  | String
 
−
  | e.g. en_GB
 
 
  |-
 
  |-
−
  | View Distance
+
  | 4
−
  | Byte
+
  | Feedback
−
  | Client-side render distance, in chunks
+
  |  
 
  |-
 
  |-
−
  | Chat Mode
+
  | 5
−
  | {{Change|Byte|VarInt}} Enum
+
  | Community
−
  | 0: enabled, 1: commands only, 2: hidden
+
  |  
 
  |-
 
  |-
−
  | Chat Colors
+
  | 6
−
  | Boolean
+
  | Website
−
  | “Colors” multiplayer setting
+
  |  
 
  |-
 
  |-
−
  | Displayed Skin Parts
+
  | 7
−
| Unsigned Byte
+
  | Forums
−
| Skin parts, see note below
+
  |  
−
|- style="background-color: #d9ead3;"
 
−
  | Main Hand
 
−
  | VarInt Enum
 
−
| 0: Left, 1: Right
 
−
|}
 
−
 
 
−
''Displayed Skin Parts'' flags:
 
−
 
 
−
* Bit 0 (0x01): Cape enabled
 
−
* Bit 1 (0x02): Jacket enabled
 
−
* Bit 2 (0x04): Left Sleeve enabled
 
−
* Bit 3 (0x08): Right Sleeve enabled
 
−
* Bit 4 (0x10): Left Pants Leg enabled
 
−
* Bit 5 (0x20): Right Pants Leg enabled
 
−
* Bit 6 (0x40): Hat enabled
 
−
 
 
−
The most significant bit (bit 7, 0x80) appears to be unused.
 
−
 
 
−
==== Use Entity ====
 
−
 
 
−
This packet is sent from the client to the server when the client attacks or right-clicks another entity (a player, minecart, etc).
 
−
 
 
−
A Notchian server only accepts this packet if the entity being attacked/used is visible without obstruction and within a 4-unit radius of the player's position.
 
−
 
 
−
Note that middle-click in creative mode is interpreted by the client and sent as a [[#Creative Inventory Action|Creative Inventory Action]] packet instead.
 
−
 
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
 
  |-
 
  |-
−
  |rowspan="6"| {{Change|0x02|0x0A}}
+
  | 8
−
|rowspan="6"| Play
+
  | News
−
|rowspan="6"| Server
 
−
| Target
 
−
  | VarInt
 
 
  |  
 
  |  
 
  |-
 
  |-
−
  | Type
+
  | 9
−
  | VarInt Enum
+
  | Announcements
−
  | 0: interact, 1: attack, 2: interact at
+
  |  
 
  |-
 
  |-
−
| Target X
 
−
| Optional Float
 
−
| Only if Type is interact at
 
−
|-
 
−
| Target Y
 
−
| Optional Float
 
−
| Only if Type is interact at
 
−
|-
 
−
| Target Z
 
−
| Optional Float
 
−
| Only if Type is interact at
 
−
|- style="background-color: #d9ead3;"
 
−
| Hand
 
−
| Optional VarInt Enum
 
−
| Only if Type is interact or interact at; 0: main hand, 1: off hand
 
 
  |}
 
  |}
  
−
==== {{Change||Vehicle Move (serverbound)}} ====
+
=== Serverbound ===
  
−
Sent when a player moves in a vehicle. Fields are the same as in [[#Player Position And Look|Player Position And Look]]. Note that all fields use absolute positioning and do not allow for relative positioning.
+
No changes so far.
  
−
{| class="wikitable"
+
== Play ==
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
|rowspan="7"| 0x10
 
−
|rowspan="7"| Play
 
−
|rowspan="7"| Server
 
−
| X
 
−
| Double
 
−
| Absolute position (X coordinate)
 
−
|-
 
−
| Y
 
−
| Double
 
−
| Absolute position (Y coordinate)
 
−
|-
 
−
| Z
 
−
| Double
 
−
| Absolute position (Z coordinate)
 
−
|-
 
−
| Yaw
 
−
| Float
 
−
| Absolute rotation on the vertical Axis, in degrees
 
−
|-
 
−
| Pitch
 
−
| Float
 
−
| Absolute rotation on the horizontal Axis, in degrees
 
−
|}
 
  
−
==== {{Change||Steer Boat}} ====
+
=== 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.
  
−
{| 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="2"| 0x11
+
  | rowspan="3"| 0x7A
−
  |rowspan="2"| Play
+
| rowspan="3"| Configuration
−
  |rowspan="2"| Server
+
| rowspan="3"| Client
−
  | Boolean
+
| colspan="2"| Details Count
−
  | Unknown
+
  | colspan="2"| {{Type|VarInt}} (32)
 +
| The number of details in the following array.
 +
|-
 +
  | rowspan="2"| Details
 +
  | Title
 +
  | rowspan="2"| {{Type|Array}}
 +
| {{Type|String}} (128)
 
  |
 
  |
 
  |-
 
  |-
−
  | Boolean
+
  | Description
−
  | Unknown 2
+
  | {{Type|String}} (4096)
 
  |
 
  |
−
|}
+
|}
  
−
==== Player Digging ====
+
==== Clientbound Server Links (play) ====
  
−
Sent when the player mines a block. A Notchian server only accepts digging packets with coordinates within a 6-unit radius of the player's position.
+
This packet contains a list of links that the Notchian client will display in the menu available from the pause menu. Link labels can be built-in or custom (i.e., any text).
  
−
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
−
  ! Field Name
+
  ! colspan="2"| Field Name
−
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  |rowspan="3"| {{Change|0x07|0x13}}
+
  | rowspan="4"| 0x7B
−
  |rowspan="3"| Play
+
  | rowspan="4"| Configuration
−
  |rowspan="3"| Server
+
  | rowspan="4"| Client
−
  | Status
+
  | colspan="2"| Links Count
−
| Byte Enum
+
  | colspan="2"| {{Type|VarInt}}
−
  | The action the player is taking against the block (see below)
+
  | The number of links in the following array.
−
|-
 
−
| Location
 
−
| Position
 
−
| Block position
 
−
|-
 
−
| Face
 
−
| Byte Enum
 
−
| The face being hit (see below)
 
−
|}
 
−
 
 
−
Status can be one of seven values:
 
−
 
 
−
{| class="wikitable"
 
−
! Value
 
−
! Meaning
 
−
! Notes
 
−
|-
 
−
| 0
 
−
  | Started digging
 
−
|
 
−
|-
 
−
| 1
 
−
| Cancelled digging
 
−
| Sent when the player lets go of the Mine Block key (default: left click)
 
 
  |-
 
  |-
−
  | 2
+
  | rowspan="3"| Links
−
  | Finished digging
+
| Is built-in
−
  | Sent when the client thinks it is finished
+
| rowspan="3"| {{Type|Array}}
 +
  | {{Type|Boolean}}
 +
  | Determines if the following label is built-in (from enum) or custom (text component).
 
  |-
 
  |-
−
  | 3
+
  | Label
−
  | Drop item stack
+
  | {{Type|VarInt}} {{Type|Enum}} / {{Type|Text Component}}
−
  | Triggered by using the Drop Item key (default: Q) with the modifier to drop the entire selected stack (default: depends on OS). Location is always set to 0/0/0, Face is always set to -Y.
+
  | See below.
 
  |-
 
  |-
−
  | 4
+
  | URL
−
  | Drop item
+
  | {{Type|String}}
−
| Triggered by using the Drop Item key (default: Q). Location is always set to 0/0/0, Face is always set to -Y.
+
  | Valid URL.
−
|-
+
|}
−
| 5
 
−
| Shoot arrow / finish eating
 
−
| Location is always set to 0/0/0, Face is always set to Special.
 
−
|- style="background-color: #d9ead3;"
 
−
| 6
 
−
  | Swap item in hand
 
−
| Used to swap or assign an item to the second hand. Location is always set to 0/0/0, Face is always set to -Y.
 
−
|}
 
  
−
The Face field can be one of the following values, representing the face being hit (or the Special value used for “shoot arrow / finish eating”):
+
{| class="wikitable" {{added}}
−
 
+
  ! ID
−
{| class="wikitable"
+
  ! Name
−
|-
 
−
! Value
 
−
! Offset
 
−
! Face
 
−
|-
 
−
| 0
 
−
| -Y
 
−
| Bottom
 
−
|-
 
−
| 1
 
−
| +Y
 
−
| Top
 
−
|-
 
−
| 2
 
−
| -Z
 
−
| North
 
−
|-
 
−
| 3
 
−
| +Z
 
−
| South
 
−
|-
 
−
| 4
 
−
| -X
 
−
| West
 
−
|-
 
−
| 5
 
−
| +X
 
−
| East
 
−
|-
 
−
| 255
 
−
| —
 
−
| Special
 
−
|}
 
−
 
 
−
==== Entity Action ====
 
−
 
 
−
Sent at least when crouching, leaving a bed, or sprinting. To send action animation to client use 0x28. The client will send this with Action ID = 3 when “Leave Bed” is clicked.
 
−
 
 
−
{| class="wikitable"
 
−
  ! Packet ID
 
−
  ! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
 
  ! Notes
 
  ! Notes
−
|-
 
−
|rowspan="3"| {{Change|0x0B|0x14}}
 
−
|rowspan="3"| Play
 
−
|rowspan="3"| Server
 
−
| Entity ID
 
−
| VarInt
 
−
| Player ID
 
−
|-
 
−
| Action ID
 
−
| VarInt Enum
 
−
| The ID of the action, see below
 
−
|-
 
−
| Jump Boost
 
−
| VarInt
 
−
| Horse jump boost. Ranged from 0 to 100.
 
−
|}
 
−
 
−
Action ID can be one of the following values:
 
−
 
−
{| class="wikitable"
 
−
! ID
 
−
! Action
 
 
  |-
 
  |-
 
  | 0
 
  | 0
−
  | Crouch
+
  | Bug Report
 +
| Displayed on connection error screen; included as a comment in the disconnection report.
 
  |-
 
  |-
 
  | 1
 
  | 1
−
  | Uncrouch
+
  | Community Guidelines
 +
|
 
  |-
 
  |-
 
  | 2
 
  | 2
−
  | Leave bed
+
  | Support
 +
|
 
  |-
 
  |-
 
  | 3
 
  | 3
−
  | Start sprinting
+
  | Status
 +
|
 
  |-
 
  |-
 
  | 4
 
  | 4
−
  | Stop sprinting
+
  | Feedback
 +
|
 
  |-
 
  |-
 
  | 5
 
  | 5
−
  | Start Jump with horse
+
  | Community
 +
|
 
  |-
 
  |-
 
  | 6
 
  | 6
−
  | Stop Jump with horse
+
  | Website
 +
|
 
  |-
 
  |-
 
  | 7
 
  | 7
−
  | Open ridden horse inventory
+
  | Forums
 +
|
 
  |-
 
  |-
 
  | 8
 
  | 8
−
  | Start Elytra Flying
+
  | News
−
  |}
+
  |  
−
 
 
−
“Open inventory” is now sent via the [[#Client Status|Client Status]] packet.
 
−
 
 
−
==== Update Sign ====
 
−
 
 
−
This message is sent from the client to the server when the “Done” button is pushed after placing a sign.
 
−
 
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
|rowspan="5"| {{Change|0x12|0x19}}
 
−
|rowspan="5"| Play
 
−
|rowspan="5"| Server
 
−
| Location
 
−
| Position
 
−
| Block Coordinates
 
−
|-
 
−
| Line 1
 
−
| {{Change|[[Chat]]|String}}
 
−
| First line of text in the sign
 
−
|-
 
−
| Line 2
 
−
| {{Change|[[Chat]]|String}}
 
−
| Second line of text in the sign
 
−
|-
 
−
| Line 3
 
−
| {{Change|[[Chat]]|String}}
 
−
| Third line of text in the sign
 
−
|-
 
−
| Line 4
 
−
| {{Change|[[Chat]]|String}}
 
−
| Fourth line of text in the sign
 
−
|}
 
−
 
 
−
==== Animation ====
 
−
 
 
−
Sent when the player's arm swings.
 
−
 
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
|rowspan="1"| {{Change|0x0A|0x1A}}
 
−
|rowspan="1"| Play
 
−
|rowspan="1"| Server
 
−
|style="background-color: #d9ead3;"| Hand
 
−
|style="background-color: #d9ead3;"| VarInt Enum
 
−
|style="background-color: #d9ead3;"| Hand used for the animation
 
−
|}
 
−
 
 
−
==== Player Block Placement ====
 
−
 
 
−
{| class="wikitable"
 
−
|-
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
 
  |-
 
  |-
−
  |rowspan="7"| {{Change|0x08|0x1C}}
+
  | 9
−
|rowspan="7"| Play
+
  | Announcements
−
|rowspan="7"| Server
 
−
| Location
 
−
| Position
 
−
| Block position
 
−
|-
 
−
| Face
 
−
  | {{Change|Byte|VarInt}} Enum
 
−
| The face on which the block is placed (as documented at [[#Player Digging|Player Digging]])
 
−
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
−
| Held Item
 
−
| [[Slot Data|Slot]]
 
 
  |  
 
  |  
−
|- style="background-color: #d9ead3;"
 
−
| Hand
 
−
| VarInt Enum
 
−
| The hand from which the block is placed; 0: main hand, 1: off hand
 
 
  |-
 
  |-
−
| Cursor Position X
 
−
| Unsigned Byte
 
−
| The position of the crosshair on the block, from 0 to 15 increasing from west to east
 
−
|-
 
−
| Cursor Position Y
 
−
| Unsigned Byte
 
−
| The position of the crosshair on the block, from 0 to 15 increasing from bottom to top
 
−
|-
 
−
| Cursor Position Z
 
−
| Unsigned Byte
 
−
| The position of the crosshair on the block, from 0 to 15 increasing from north to south
 
 
  |}
 
  |}
−
 
−
In normal operation (i.e. placing a block), this packet is sent once, with the values set normally.
 
−
 
−
The Cursor Position X/Y/Z fields (also known as in-block coordinates) are calculated using raytracing. The unit corresponds to one pixel in the default resource pack. For example, let's say a slab is being placed against the south face of a full block. The Cursor Position X will be higher if the player was pointing near the right (east) edge of the face, lower if pointing near the left. The Cursor Position Y will be used to determine whether it will appear as a bottom slab (values 0–7) or as a top slab (values 8–15). The Cursor Position Z should be 15 since the player was looking at the southernmost part of the block.
 
−
 
−
This packet has a special case where X, Y, Z, and Direction are all -1. (Note that Y is unsigned so set to 255.) This special packet indicates that the currently held item for the player should have its state updated such as eating food, pulling back bows, using buckets, etc.
 
−
 
−
Special note on using buckets: When using buckets, the Notchian client might send two packets: first a normal and then a special case. The first normal packet is sent when you're looking at a block (e.g. the water you want to scoop up). This normal packet does not appear to do anything with a Notchian server. The second, special case packet appears to perform the action — based on current position/orientation and with a distance check — it appears that buckets can only be used within a radius of 6 units.
 
−
 
−
==== {{Change||Use Item}} ====
 
−
 
−
Sent when pressing the Use Item key (default: right click) with an item in hand.
 
−
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
|rowspan="1"| 0x1D
 
−
|rowspan="1"| Play
 
−
|rowspan="1"| Server
 
−
| Hand
 
−
| VarInt Enum
 
−
| Hand used for the animation
 
−
|}
 
−
 
−
== Status ==
 
−
 
−
=== Clientbound ===
 
−
 
−
No changes so far.
 
  
 
=== Serverbound ===
 
=== Serverbound ===
Line 765: Line 279:
 
No changes so far.
 
No changes so far.
  
−
== Login ==
+
[[Category:Minecraft Modern]]
−
 
 
−
=== 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.

Retrieved from "https://wiki.vg/index.php?title=Pre-release_protocol&oldid=19307"