Difference between revisions of "Pre-release protocol"

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(→‎Entity Look And Relative Move: fix move explanation)
(Updated to 1.21-pre2)
 
(984 intermediate revisions by 57 users not shown)
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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|1.9.1-pre2, protocol 108]]). 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 27: 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|0x23|Join Game}}
+
{{PacketList|0x7A|Clientbound Report Details (play)|rel=added}}
−
{{PacketList|0x25|Entity Relative Move}}
+
{{PacketList|0x7B|Clientbound Server Links (play)|rel=added}}
−
{{PacketList|0x26|Entity Look And Relative Move}}
 
−
{{PacketList|0x3A|Attach Entity}}
 
 
  |-
 
  |-
−
!colspan="4"| Play serverbound
+
|}
−
{{PacketList|0x00|Teleport Confirm|rel=added}}
 
−
{{PacketList|0x01|Tab-Complete|rel=Tab-Complete 2}}
 
−
{{PacketList|0x03|Client Status}}
 
−
{{PacketList|0x04|Client Settings}}
 
−
{{PacketList|0x0A|Use Entity}}
 
−
{{PacketList|0x10|Vehicle Move (serverbound)|rel=added}}
 
−
{{PacketList|0x11|Steer Boat|rel=added}}
 
−
{{PacketList|0x13|Player Digging}}
 
−
{{PacketList|0x14|Entity Action}}
 
−
{{PacketList|0x19|Update Sign|rel=Update Sign 2}}
 
−
{{PacketList|0x1A|Animation|rel=Animation 2}}
 
−
{{PacketList|0x1C|Player Block Placement}}
 
−
{{PacketList|0x1D|Use Item|rel=added}}
 
−
|}
 
  
−
== 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 ==
  
−
==== Handshake ====
+
No changes so far.
  
−
This causes the server to switch into the target state.
+
== Configuration ==
−
 
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
|rowspan="4"| 0x00
 
−
|rowspan="4"| Handshaking
 
−
|rowspan="4"| Server
 
−
| Protocol Version
 
−
| VarInt
 
−
| See [[protocol version numbers]] (currently {{Change|107|108}})
 
−
|-
 
−
| Server Address
 
−
| String
 
−
| hostname or IP, e.g. localhost or 127.0.0.1 (does this support IPv6?)
 
−
|-
 
−
| Server Port
 
−
| Unsigned Short
 
−
| default is 25565
 
−
|-
 
−
| Next State
 
−
| VarInt Enum
 
−
| 1 for [[#Status|status]], 2 for [[#Login|login]]
 
−
|}
 
−
 
 
−
== Play ==
 
  
 
=== Clientbound ===
 
=== Clientbound ===
  
−
==== Join Game ====
+
==== Clientbound Report Details (configuration) ====
  
−
See [[Protocol Encryption]] for information on logging in.
+
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="7"| 0x23
+
  | rowspan="3"| 0x0F
−
  |rowspan="7"| Play
+
  | rowspan="3"| Configuration
−
  |rowspan="7"| Client
+
  | rowspan="3"| Client
−
  | Entity ID
+
  | colspan="2"| Details Count
−
  | Int
+
  | colspan="2"| {{Type|VarInt}} (32)
−
  | The player's Entity ID (EID)
+
  | The number of details in the following array.
 
  |-
 
  |-
−
  | Gamemode
+
  | rowspan="2"| Details
−
  | Unsigned Byte
+
  | Title
−
  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. Bit 3 (0x8) is the hardcore flag.
+
  | rowspan="2"| {{Type|Array}}
 +
| {{Type|String}} (128)
 +
|
 
  |-
 
  |-
−
  | Dimension
+
  | Description
−
  | {{Change|Byte|Int}} Enum
+
  | {{Type|String}} (4096)
−
| -1: Nether, 0: Overworld, 1: End
+
  |
−
|-
+
|}
−
| Difficulty
 
−
| Unsigned Byte
 
−
| 0: peaceful, 1: easy, 2: normal, 3: hard
 
−
|-
 
−
  | Max Players
 
−
| Unsigned Byte
 
−
| Used by the client to draw the player list
 
−
|-
 
−
| Level Type
 
−
| String
 
−
| default, flat, largeBiomes, amplified, default_1_1
 
−
|-
 
−
| Reduced Debug Info
 
−
| Boolean
 
−
| If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}.
 
−
|}
 
  
−
==== Entity Relative Move ====
+
==== Clientbound Server Links (configuration) ====
  
−
This packet is sent by the server when an entity moves less then 8 blocks; if an entity moves more than 8 blocks [[#Entity Teleport|Entity Teleport]] should be sent instead.
+
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).
  
−
This packet allows at most 8 blocks movement in any direction, because short range is from -32768 to 32767. And 32768/(128*32)=8.
+
{| 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="5"| {{Change|0x15|0x25}}
+
  | rowspan="4"| 0x10
−
  |rowspan="5"| Play
+
  | rowspan="4"| Configuration
−
  |rowspan="5"| 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.
 
  |-
 
  |-
−
  | On Ground
+
  | URL
−
  | Boolean
+
  | {{Type|String}}
−
  |  
+
  | Valid URL.
−
|}
+
|}
  
−
==== Entity Look And Relative Move ====
 
  
−
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 8 blocks movement in any direction. (-32768/(32*128) == -8)
+
{| class="wikitable" {{added}}
−
 
+
  ! ID
−
{| class="wikitable"
+
  ! Name
−
  ! Packet ID
 
−
  ! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  |rowspan="7"| {{Change|0x17|0x26}}
+
  | 0
−
  |rowspan="7"| Play
+
| Bug Report
−
  |rowspan="7"| Client
+
  | Displayed on connection error screen; included as a comment in the disconnection report.
−
  | Entity ID
+
  |-
−
  | VarInt
+
  | 1
 +
  | Community Guidelines
 
  |  
 
  |  
 
  |-
 
  |-
−
  | Delta X
+
  | 2
−
  | {{Change|Byte|Short}}
+
  | Support
−
  | Change in X position as {{Change|a [[Data Types#Fixed-point numbers|Fixed-Point number]]|(currentX * 32 - prevX * 32) * 128}}
+
  |  
 
  |-
 
  |-
−
  | Delta Y
+
  | 3
−
  | {{Change|Byte|Short}}
+
  | Status
−
  | Change in Y position as {{Change|a [[Data Types#Fixed-point numbers|Fixed-Point number]]|(currentY * 32 - prevY * 32) * 128}}
+
  |  
 
  |-
 
  |-
−
  | Delta Z
+
  | 4
−
  | {{Change|Byte|Short}}
+
  | Feedback
−
  | Change in Z position as {{Change|a [[Data Types#Fixed-point numbers|Fixed-Point number]]|(currentZ * 32 - prevZ * 32) * 128}}
+
  |  
 
  |-
 
  |-
−
  | Yaw
+
  | 5
−
  | Angle
+
  | Community
−
  | New angle, not a delta
+
  |  
 
  |-
 
  |-
−
  | Pitch
+
  | 6
−
  | Angle
+
  | Website
−
  | New angle, not a delta
+
  |  
 
  |-
 
  |-
−
  | On Ground
+
  | 7
−
  | Boolean
+
  | Forums
 
  |  
 
  |  
−
|}
 
−
 
−
==== Attach Entity ====
 
−
 
−
This packet is sent when a player has been attached to an entity (e.g. Minecart).
 
−
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
 
  |-
 
  |-
−
  |rowspan="3"| {{change|0x1B|0x3A}}
+
  | 8
−
|rowspan="3"| Play
+
  | News
−
|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
+
  | 9
−
  | Boolean
+
  | Announcements
 
  |  
 
  |  
 
  |-
 
  |-
−
| Looked At Block
 
−
| Optional Position
 
−
| The position of the block being looked at. Only sent if Has Position is true.
 
 
  |}
 
  |}
  
−
==== Client Status ====
+
=== Serverbound ===
  
−
Sent when the client is ready to complete login and when the client is ready to respawn after death.
+
No changes so far.
  
−
{| class="wikitable"
+
== Play ==
−
! 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:
+
=== Clientbound ===
  
−
{| class="wikitable"
+
==== Clientbound Report Details (play) ====
−
|-
 
−
! Action ID
 
−
! Action
 
−
|-
 
−
| 0
 
−
| Perform respawn
 
−
|-
 
−
| 1
 
−
| Request stats
 
−
|-
 
−
| 2
 
−
| {{Change|''Taking Inventory'' achievement|Open Inventory}}
 
−
|}
 
−
 
 
−
==== 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}}
 
−
|rowspan="6"| Play
 
−
|rowspan="6"| Server
 
−
| Locale
 
−
| String
 
−
| e.g. en_GB
 
−
|-
 
−
| View Distance
 
−
| Byte
 
−
| Client-side render distance, in chunks
 
−
|-
 
−
| Chat Mode
 
−
| {{Change|Byte|VarInt}} Enum
 
−
| 0: enabled, 1: commands only, 2: hidden
 
−
|-
 
−
| Chat Colors
 
−
| Boolean
 
−
| “Colors” multiplayer setting
 
−
|-
 
−
| Displayed Skin Parts
 
−
| Unsigned Byte
 
−
| 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).
+
Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.
  
−
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.
+
{| class="wikitable" {{added}}
−
 
 
−
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
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
−
  ! Field Name
+
  ! colspan="2"| Field Name
−
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  |rowspan="6"| {{Change|0x02|0x0A}}
+
  | rowspan="3"| 0x7A
−
  |rowspan="6"| Play
+
  | rowspan="3"| Configuration
−
  |rowspan="6"| Server
+
  | rowspan="3"| Client
−
  | Target
+
  | colspan="2"| Details Count
−
| VarInt
+
  | colspan="2"| {{Type|VarInt}} (32)
−
|
+
| The number of details in the following array.
−
|-
 
−
| Type
 
−
| VarInt Enum
 
−
| 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)}} ====
 
−
 
 
−
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.
 
−
 
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
 
  |-
 
  |-
−
  |rowspan="7"| 0x10
+
  | rowspan="2"| Details
−
  |rowspan="7"| Play
+
  | Title
−
  |rowspan="7"| Server
+
  | rowspan="2"| {{Type|Array}}
−
| X
+
  | {{Type|String}} (128)
−
| 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}} ====
 
−
 
 
−
 
 
−
 
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
|rowspan="2"| 0x11
 
−
|rowspan="2"| Play
 
−
|rowspan="2"| Server
 
−
| Boolean
 
−
| Unknown
 
 
  |
 
  |
 
  |-
 
  |-
−
  | 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
+
  | rowspan="3"| Links
−
  | Position
+
| Is built-in
−
  | Block position
+
| rowspan="3"| {{Type|Array}}
 +
  | {{Type|Boolean}}
 +
  | Determines if the following label is built-in (from enum) or custom (text component).
 
  |-
 
  |-
−
  | Face
+
  | Label
−
  | Byte Enum
+
  | {{Type|VarInt}} {{Type|Enum}} / {{Type|Text Component}}
−
| The face being hit (see below)
+
  | 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
 
−
| Finished digging
 
−
| Sent when the client thinks it is finished
 
 
  |-
 
  |-
−
  | 3
+
  | URL
−
  | Drop item stack
+
  | {{Type|String}}
−
| 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.
+
  | Valid URL.
−
|-
+
|}
−
| 4
 
−
| Drop item
 
−
| Triggered by using the Drop Item key (default: Q). Location is always set to 0/0/0, Face is always set to -Y.
 
−
|-
 
−
| 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 804: 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"