Difference between revisions of "Pre-release protocol"

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(Updated to 1.21-pre2)
 
Line 1: Line 1:
−
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently 1.2.5) to the current pre-release (or weekly release).
+
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.
  
−
== New packets ==
+
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.
  
−
=== Tab-complete (0xCB) ===
+
== Contents ==
  
−
''Two-way''
+
<div style="float:right;">__TOC__</div>
  
−
Sent C->S when the user presses [tab] while writing text. The payload contains all text behind the cursor.
+
=== Data types ===
  
−
The server responds with an auto-completion of the last word sent to it. In the case of regular chat, this is a player username. Command names and parameters are also supported.
+
No changes documented so far.
  
−
In the event of more than one possible completion, the server responds with the options packed into the single string field, separated by a null character. Note that as strings are UTF-16, this is two bytes wide.
+
=== Packets ===
  
 
{| class="wikitable"
 
{| class="wikitable"
−
|- class="row0"
+
! ID
−
! class="col0" | Packet ID
+
! Packet name
−
! class="col1" | Field Name
+
!colspan="2"| Documentation
−
! class="col2" | Field Type
+
|-
−
! class="col3" | Example
+
!colspan="4"| Configuration clientbound
−
! class="col4" | Notes
+
{{PacketList|0x0F|Clientbound Report Details (configuration)|rel=added}}
−
|- class="row1"
+
{{PacketList|0x10|Clientbound Server Links (configuration)|rel=added}}
−
| class="col0 centeralign" | 0xCB
+
|-
−
| class="col1 centeralign" | Text
+
!colspan="4"| Play clientbound
−
| class="col2 centeralign" | string
+
{{PacketList|0x7A|Clientbound Report Details (play)|rel=added}}
−
| class="col3 centeralign" |  
+
{{PacketList|0x7B|Clientbound Server Links (play)|rel=added}}
−
| class="col4" |
+
|-
−
|- class="row3"
 
−
! class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 3 bytes + length of string
 
 
|}
 
|}
  
−
=== Locale and View Distance (0xCC) ===
+
== Handshake ==
  
−
''Client to server''
+
No changes so far.
  
−
Sent when the player connects, or when settings are changed.
+
== Status ==
  
−
{| class="wikitable"
+
No changes so far.
−
|- class="row0"
 
−
! class="col0" | Packet ID
 
−
! class="col1" | Field Name
 
−
! class="col2" | Field Type
 
−
! class="col3" | Example
 
−
! class="col4" | Notes
 
−
|- class="row1"
 
−
| class="col0 centeralign" rowspan="4" | 0xCC
 
−
| class="col1 centeralign" | Locale
 
−
| class="col2 centeralign" | string
 
−
| class="col3 centeralign" | en_GB
 
−
|- class="row2"
 
−
| class="col1 centeralign" | View distance
 
−
| class="col2 centeralign" | byte
 
−
| class="col3 centeralign" | 0
 
−
| class="col4" | 0-3 for 'far', 'normal', 'short', 'tiny'.
 
−
|- class="row3"
 
−
| class="col1 centeralign" | Chat flags
 
−
| class="col2 centeralign" | byte
 
−
| class="col3 centeralign" | 8
 
−
| class="col4" | Bit field. 0: chat enabled, 2: colors enabled
 
−
|- class="row4"
 
−
| class="col1 centeralign" | Unknown
 
−
| class="col2 centeralign" | byte
 
−
| class="col3 centeralign" | 0
 
−
| class="col4 centeralign" | First three bits(bitmask 0x7) are used as a number, bit four(bitmask 0x8) is used as bool
 
−
|- class="row5"
 
−
! class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 8 bytes + length of string
 
−
|}
 
−
 
 
−
=== Encryption Key Response (0xFC) ===
 
−
 
 
−
''Two-Way''
 
−
 
 
−
See [[Protocol Encryption]] for information on this packet.
 
−
 
 
−
{| class="wikitable"
 
−
|- class="row0"
 
−
! class="col0" | Packet ID
 
−
! class="col1" | Field Name
 
−
! class="col2" | Field Type
 
−
! class="col3" | Example
 
−
! class="col4" | Notes
 
−
|- class="row1"
 
−
| class="col0 centeralign" rowspan="4" | 0xFC
 
−
| class="col1 centeralign" | Shared secret length
 
−
| class="col2 centeralign" | short
 
−
| class="col3 centeralign" |
 
−
| class="col4 centeralign" |
 
−
|- class="row2"
 
−
| class="col1 centeralign" | Shared secret
 
−
| class="col2 centeralign" | byte array
 
−
| class="col3 centeralign" |
 
−
| class="col4 centeralign" |
 
−
|- class="row3"
 
−
| class="col1 centeralign" | Verify token length
 
−
| class="col2 centeralign" | short
 
−
| class="col3 centeralign" |
 
−
| class="col4 centeralign" | 
 
−
|- class="row4"
 
−
| class="col1 centeralign" | Verify token response
 
−
| class="col2 centeralign" | byte array
 
−
| class="col3 centeralign" |
 
−
| class="col4 centeralign" |
 
−
|- class="row5"
 
−
! class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 5 bytes + length of shared secret + length of token
 
−
|}
 
−
 
 
−
=== Encryption Key Request (0xFD) ===
 
−
 
 
−
''Server to client''
 
−
 
 
−
See [[Protocol Encryption]] for information on this packet.
 
−
 
 
−
{| class="wikitable"
 
−
|- class="row0"
 
−
! class="col0" | Packet ID
 
−
! class="col1" | Field Name
 
−
! class="col2" | Field Type
 
−
! class="col3" | Example
 
−
! class="col4" | Notes
 
−
|- class="row1"
 
−
| class="col0 centeralign" rowspan="5" | 0xFD
 
−
| class="col1 centeralign" | Server id
 
−
| class="col2 centeralign" | string
 
−
| class="col3 centeralign" |
 
−
| class="col4 centeralign" |
 
−
|- class="row2"
 
−
| class="col1 centeralign" | Public key length
 
−
| class="col2 centeralign" | short
 
−
| class="col3 centeralign" |
 
−
| class="col4 centeralign" |
 
−
|- class="row3"
 
−
| class="col1 centeralign" | Public key
 
−
| class="col2 centeralign" | byte array
 
−
| class="col3 centeralign" |
 
−
| class="col4 centeralign" |
 
−
|- class="row4"
 
−
| class="col1 centeralign" | Verify token length
 
−
| class="col2 centeralign" | short
 
−
| class="col3 centeralign" |
 
−
| class="col4 centeralign" |
 
−
|- class="row4"
 
−
| class="col1 centeralign" | Verify token
 
−
| class="col2 centeralign" | byte array
 
−
| class="col3 centeralign" |
 
−
| class="col4 centeralign" |
 
−
|- class="row5"
 
−
! class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 7 bytes + length of string + length of key + length of token
 
−
|}
 
−
 
 
−
=== Named Sound Effect (0x3E) ===
 
−
 
 
−
''Server to client''
 
−
 
 
−
Used to play a sound effect on the client.
 
−
 
 
−
{| class="wikitable"
 
−
|- class="row0"
 
−
! class="col0" | Packet ID
 
−
! class="col1" | Field Name
 
−
! class="col2" | Field Type
 
−
! class="col3" | Example
 
−
! class="col4" | Notes
 
−
|- class="row1"
 
−
| class="col0 centeralign" rowspan="6" | 0x3E
 
−
| class="col1 centeralign" | Sound name
 
−
| class="col2 centeralign" | string
 
−
| class="col3 centeralign" | step.grass
 
−
| class="col4 centeralign" | 250
 
−
|- class="row2"
 
−
| class="col1 centeralign" | Effect position X
 
−
| class="col2 centeralign" | int
 
−
| class="col3 centeralign" | 250
 
−
| class="col4 centeralign" | effect X multiplied by 8
 
−
|- class="row3"
 
−
| class="col1 centeralign" | Effect position Y
 
−
| class="col2 centeralign" | int
 
−
| class="col3 centeralign" | 250
 
−
| class="col4 centeralign" | effect Y multiplied with 8
 
−
|- class="row4"
 
−
| class="col1 centeralign" | Effect position Z
 
−
| class="col2 centeralign" | int
 
−
| class="col3 centeralign" | 250
 
−
| class="col4 centeralign" | effect Z multiplied with 8
 
−
|- class="row5"
 
−
| class="col1 centeralign" | Volume
 
−
| class="col2 centeralign" | float
 
−
| class="col3 centeralign" | 9
 
−
| class="col4 centeralign" | 63 is 100%, can be more
 
−
|- class="row6"
 
−
| class="col1 centeralign" | Pitch
 
−
| class="col2 centeralign" | byte
 
−
| class="col3 centeralign" | 63
 
−
| class="col4 centeralign" | 63 is 100%, can be more
 
−
|- class="row7"
 
−
! class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 20 bytes + length of string
 
−
|}
 
−
 
 
−
=== Block Break Animation (0x37) ===
 
−
 
 
−
{| class="wikitable"
 
−
|- class="row0"
 
−
! class="col0" | Packet ID
 
−
! class="col1" | Field Name
 
−
! class="col2" | Field Type
 
−
! class="col3" | Example
 
−
! class="col4" | Notes
 
−
|- class="row1"
 
−
| class="col0 centeralign" rowspan=5 | 0x37
 
−
| class="col1 centeralign" | EID?
 
−
| class="col2 centeralign" | int
 
−
| class="col3 centeralign" |
 
−
| class="col4" | Entity breaking the block?
 
−
|- class="row2"
 
−
| class="col1 centeralign" | X
 
−
| class="col2 centeralign" | int
 
−
| class="col3 centeralign" |
 
−
| class="col4" rowspan=3 | Block position
 
−
|- class="row2"
 
−
| class="col1 centeralign" | Y
 
−
| class="col2 centeralign" | int
 
−
| class="col3 centeralign" |
 
−
|- class="row2"
 
−
| class="col1 centeralign" | Z
 
−
| class="col2 centeralign" | int
 
−
| class="col3 centeralign" |
 
−
|- class="row3"
 
−
| class="col1 centeralign" | Unknown
 
−
| class="col2 centeralign" | byte
 
−
| class="col3 centeralign" | 1
 
−
| class="col4" | ?
 
−
|- class="row2"
 
−
! class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 4 bytes
 
−
|}
 
−
 
 
−
== Changed packets ==
 
−
 
 
−
=== Login Request (0x01) ===
 
−
 
 
−
''Two-Way''
 
−
 
 
−
See [[Protocol Encryption]] for information on logging in.
 
  
−
'''Client to Server'''
+
== Login ==
  
−
Just 1 byte C->S
+
No changes so far.
  
−
{| class="wikitable"
+
== Configuration ==
−
|- class="row0"
 
−
! class="col0" | Packet ID
 
−
|- class="row1"
 
−
| class="col0 centeralign" | 0x01
 
−
|}
 
  
−
'''Server to Client'''
+
=== Clientbound ===
  
−
{| class="wikitable"
+
==== Clientbound Report Details (configuration) ====
−
|- class="row0"
 
−
! class="col0" | Packet ID
 
−
! class="col1" | Field Name
 
−
! class="col2" | Field Type
 
−
! class="col3" | Example
 
−
! class="col4" | Notes
 
−
|- class="row1"
 
−
| class="col0 centeralign" rowspan="7" | 0x01
 
−
| class="col1 centeralign" | Entity ID
 
−
| class="col2 centeralign" | int
 
−
| class="col3 centeralign" | <code>1298</code>
 
−
| class="col4" | The Players Entity ID
 
−
|- class="row2"
 
−
| class="col0 centeralign" | Level Type
 
−
| class="col1 centeralign" | string
 
−
| class="col2 centeralign" | default
 
−
| class="col3" | default or SUPERFLAT; level-type in server.properties
 
−
|- class="row3"
 
−
| class="col0 centeralign" | Server mode
 
−
| class="col1 centeralign" | byte
 
−
| class="col2 centeralign" | <code>0</code>
 
−
| class="col3" | 0 for survival, 1 for creative
 
−
|- class="row4"
 
−
| class="col0 centeralign" | Dimension
 
−
| class="col1 centeralign" | byte
 
−
| class="col2 centeralign" | <code>0</code>
 
−
| class="col3" | <code>-1</code>: The Nether, <code>0</code>: The Overworld, <code>1</code>: The End
 
−
|- class="row5"
 
−
| class="col0 centeralign" | Difficulty
 
−
| class="col1 centeralign" | byte
 
−
| class="col2 centeralign" | <code>1</code>
 
−
| class="col3" | <code>0</code> thru <code>3</code> for Peaceful, Easy, Normal, Hard
 
−
|- class="row6"
 
−
| class="col0 centeralign" | Not used
 
−
| class="col1 centeralign" | unsigned byte
 
−
| class="col2 centeralign" | <code>0</code>
 
−
| class="col3" | Only 0 observed from vanilla server, was previously world height
 
−
|- class="row7"
 
−
| class="col0 centeralign" | Max players
 
−
| class="col1 centeralign" | unsigned byte
 
−
| class="col2 centeralign" | <code>8</code>
 
−
| class="col3" | Used by the client to draw the player list
 
−
|- class="row8"
 
−
! class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 12 bytes + length of strings
 
−
|}
 
  
−
=== Handshake (0x02) ===
+
Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.
  
−
''Client to server''
+
{| class="wikitable" {{added}}
−
 
+
! Packet ID
−
See [[Protocol Encryption]] for information on logging in.
+
! State
−
 
+
! Bound To
−
{| class="wikitable"
+
! colspan="2"| Field Name
−
|- class="row0"
+
! colspan="2"| Field Type
−
! class="col0" | Packet ID
+
! Notes
−
! class="col1" | Field Name
+
|-
−
! class="col2" | Field Type
+
| rowspan="3"| 0x0F
−
! class="col3" | Example
+
| rowspan="3"| Configuration
−
! class="col4" | Notes
+
| rowspan="3"| Client
−
|- class="row1"
+
| colspan="2"| Details Count
−
| class="col0 centeralign" rowspan="4" | 0x02
+
| colspan="2"| {{Type|VarInt}} (32)
−
| class="col1 centeralign" | Protocol Version
+
| The number of details in the following array.
−
| class="col2 centeralign" | byte
+
|-
−
| class="col3 centeralign" | <code>32</code>
+
| rowspan="2"| Details
−
| class="col4" |  
+
| Title
−
|- class="row2"
+
| rowspan="2"| {{Type|Array}}
−
| class="col1 centeralign" | Username
+
| {{Type|String}} (128)
−
| class="col2 centeralign" | string
+
|
−
| class="col3 centeralign" | <code>TkTech</code>
+
|-
−
| class="col4" | The username of the player attempting to connect
+
| Description
−
|- class="row3"
+
| {{Type|String}} (4096)
−
| class="col1 centeralign" | Server Host
+
|
−
| class="col2 centeralign" | string
 
−
| class="col3 centeralign" | <code>localhost</code>
 
−
| class="col4" |  
 
−
|- class="row4"
 
−
| class="col1 centeralign" | Server Port
 
−
| class="col2 centeralign" | int
 
−
| class="col3 centeralign" | <code>25565</code>
 
−
| class="col4" |
 
−
|- class="row5"
 
−
! class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 10 bytes + length of strings
 
 
|}
 
|}
  
−
=== Entity Equipment (0x05) ===
+
==== Clientbound Server Links (configuration) ====
  
−
''Server to 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"
+
{| class="wikitable" {{added}}
−
|- class="row0"
+
! Packet ID
−
! class="col0" | Packet ID
+
! State
−
! class="col1" | Field Name
+
! Bound To
−
! class="col2" | Field Type
+
! colspan="2"| Field Name
−
! class="col3" | Example
+
! colspan="2"| Field Type
−
! class="col4" | Notes
+
! Notes
−
|- class="row1"
+
|-
−
| class="col0 centeralign" rowspan="3" | 0x05
+
| rowspan="4"| 0x10
−
| class="col1 centeralign" | Entity ID
+
| rowspan="4"| Configuration
−
| class="col2 centeralign" | int
+
| rowspan="4"| Client
−
| class="col3 centeralign" | 0x00010643
+
| colspan="2"| Links Count
−
| class="col4" | Named Entity ID
+
| colspan="2"| {{Type|VarInt}}
−
|- class="row2"
+
| The number of links in the following array.
−
| class="col0 centeralign" | Slot
+
|-
−
| class="col1 centeralign" | short
+
| rowspan="3"| Links
−
| class="col2 centeralign" | 4
+
| Is built-in
−
| class="col3" | Equipment slot: 0=held, 1-4=armor slot
+
| rowspan="3"| {{Type|Array}}
−
|- class="row3"
+
| {{Type|Boolean}}
−
| class="col0 centeralign" | Item
+
| Determines if the following label is built-in (from enum) or custom (text component).
−
| class="col1 centeralign" | slot
+
|-
−
| class="col2 centeralign" |  
+
| Label
−
| class="col3" | Item in slot format
+
| {{Type|VarInt}} {{Type|Enum}} / {{Type|Text Component}}
−
|- class="row5"
+
| See below.
−
! class="col0" | Total Size:
+
|-
−
| class="col1 rightalign" colspan="4" | 11 bytes
+
| URL
 +
| {{Type|String}}
 +
| Valid URL.
 
|}
 
|}
  
−
=== Respawn (0x09) ===
 
−
 
−
''Two-Way''
 
  
−
Sent by the client when the player presses the "Respawn" button after dying. The server then teleports the user to the spawn point, and sends a respawn packet in response.  The client will not leave the respawn screen until it receives a respawn packet.
+
{| class="wikitable" {{added}}
 +
! ID
 +
! Name
 +
! Notes
 +
|-
 +
| 0
 +
| Bug Report
 +
| Displayed on connection error screen; included as a comment in the disconnection report.
 +
|-
 +
| 1
 +
| Community Guidelines
 +
|
 +
|-
 +
| 2
 +
| Support
 +
|
 +
|-
 +
| 3
 +
| Status
 +
|
 +
|-
 +
| 4
 +
| Feedback
 +
|
 +
|-
 +
| 5
 +
| Community
 +
|
 +
|-
 +
| 6
 +
| Website
 +
|
 +
|-
 +
| 7
 +
| Forums
 +
|
 +
|-
 +
| 8
 +
| News
 +
|
 +
|-
 +
| 9
 +
| Announcements
 +
|
 +
|-
 +
  |}
  
−
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.
+
=== Serverbound ===
  
−
'''Client to Server'''
+
No changes so far.
  
−
{| class="wikitable"
+
== Play ==
−
|- class="row0"
 
−
! class="col0" | Packet ID
 
−
|- class="row1"
 
−
| class="col0 centeralign" | 0x09
 
−
|}
 
−
 
 
−
'''Server to Client'''
 
−
 
 
−
{| class="wikitable"
 
−
|- class="row0"
 
−
! class="col0" | Packet ID
 
−
! class="col1" | Field Name
 
−
! class="col2" | Field Type
 
−
! class="col3" | Example
 
−
! class="col4" | Notes
 
−
|- class="row1"
 
−
| class="col0 centeralign" rowspan="5" | 0x09
 
−
| class="col1 centeralign" | Dimension
 
−
| class="col2 centeralign" | int
 
−
| class="col3 centeralign" | <code>1</code>
 
−
| class="col4" | <code>-1</code>: The Nether, <code>0</code>: The Overworld, <code>1</code>: The End
 
−
|- class="row2"
 
−
| class="col1 centeralign" | Difficulty
 
−
| class="col2 centeralign" | byte
 
−
| class="col3 centeralign" | <code>1</code>
 
−
| class="col4" | <code>0</code> thru <code>3</code> for Peaceful, Easy, Normal, Hard. <code>1</code> is always sent c->s
 
−
|- class="row3"
 
−
| class="col1 centeralign" | Creative mode
 
−
| class="col2 centeralign" | byte
 
−
| class="col3 centeralign" | <code>1</code>
 
−
| class="col4" | <code>0</code> for survival, <code>1</code> for creative.
 
−
|- class="row4"
 
−
| class="col1 centeralign" | World height
 
−
| class="col2 centeralign" | short
 
−
| class="col3 centeralign" | <code>256</code>
 
−
| class="col4" | Defaults to <code>256</code>
 
−
|- class="row5"
 
−
| class="col1 centeralign" | Level Type
 
−
| class="col2 centeralign" | string
 
−
| class="col3 centeralign" | default
 
−
| class="col4" | See [[#0x01|0x01 login]]
 
−
|- class="row6"
 
−
! class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 11 bytes + length of string
 
−
|}
 
  
−
=== Spawn Object/Vehicle (0x17) ===
+
=== Clientbound ===
  
−
''Server to Client''
+
==== Clientbound Report Details (play) ====
  
−
Sent by the server when an Object/Vehicle is created. The throwers entity id is now used for fishing floats too.
+
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}}
−
|- class="row0"
+
! Packet ID
−
! class="col0" | Packet ID
+
! State
−
! class="col1" | Field Name
+
! Bound To
−
! class="col2" | Field Type
+
! colspan="2"| Field Name
−
! class="col3" | Example
+
! colspan="2"| Field Type
−
! class="col4" | Notes
+
! Notes
−
|- class="row1"
+
|-
−
| class="col0 centeralign" rowspan="9" | 0x17
+
| rowspan="3"| 0x7A
−
| class="col1 centeralign" | EID
+
| rowspan="3"| Configuration
−
| class="col2 centeralign" | int
+
| rowspan="3"| Client
−
| class="col3 centeralign" | <code>62</code>
+
| colspan="2"| Details Count
−
| class="col4" | Entity ID of the Object
+
| colspan="2"| {{Type|VarInt}} (32)
−
|- class="row2"
+
| The number of details in the following array.
−
| class="col0 centeralign" | Type
+
|-
−
| class="col1 centeralign" | byte
+
| rowspan="2"| Details
−
| class="col2 centeralign" | <code>11</code>
+
| Title
−
| class="col3" | The type of object (see [[Entities#Objects]])
+
| rowspan="2"| {{Type|Array}}
−
|- class="row3"
+
| {{Type|String}} (128)
−
| class="col0 centeralign" | X
+
|
−
| class="col1 centeralign" | int
+
|-
−
| class="col2 centeralign" | <code>16080</code>
+
| Description
−
| class="col3" | The Absolute Integer X Position of the object
+
| {{Type|String}} (4096)
−
|- class="row4"
+
|
−
| class="col0 centeralign" | Y
 
−
| class="col1 centeralign" | int
 
−
| class="col2 centeralign" | <code>2299</code>
 
−
| class="col3" | The Absolute Integer Y Position of the object
 
−
|- class="row5"
 
−
| class="col0 centeralign" | Z
 
−
| class="col1 centeralign" | int
 
−
| class="col2 centeralign" | <code>592</code>
 
−
| class="col3" | The Absolute Integer Z Position of the object
 
−
|- class="row6"
 
−
| class="col0 centeralign" | thrower's entity ID
 
−
| class="col1 centeralign" | int
 
−
| class="col2 centeralign" | <code>0</code>
 
−
| class="col3" | If this is bigger than 0, this is a entity trown by a other entity and the next 3 fields are sent.
 
−
|- class="row7"
 
−
| class="col0 centeralign" | Speed X
 
−
| class="col1 centeralign" | short
 
−
| class="col2 centeralign" | <code>0</code>
 
−
| class="col3" | Not sent if the thrower entity ID is 0. The speed of this entity along the X axis.
 
−
|- class="row5"
 
−
| class="col0 centeralign" | Speed Y
 
−
| class="col1 centeralign" | short
 
−
| class="col2 centeralign" | <code>0</code>
 
−
| class="col3" | Not sent if the thrower entity ID is 0. The speed of this entity along the Y axis.
 
−
|- class="row5"
 
−
| class="col0 centeralign" | Speed Z
 
−
| class="col1 centeralign" | short
 
−
| class="col2 centeralign" | <code>0</code>
 
−
| class="col3" | Not sent if the thrower entity ID is 0. The speed of this entity along the Z axis.
 
−
|- class="row6"
 
−
! class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 22 or 28 bytes
 
 
|}
 
|}
  
 +
==== Clientbound Server Links (play) ====
  
−
{{anchor|0x18}}
+
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).
−
 
 
−
 
 
−
=== Player Abilities (0xCA) ===
 
−
This packet changed with 12w17a. It now contains 3 booleans but the values of these 3 booleans are not currently known.
 
−
 
 
−
{| class="wikitable"
 
−
|- class="row0"
 
−
! class="col0" | Packet ID
 
−
! class="col1" | Field Name
 
−
! class="col2" | Field Type
 
−
! class="col3" | Example
 
−
! class="col4" | Notes
 
−
|- class="row1"
 
−
| class="col0 centeralign" rowspan=4 | 0xCA
 
−
| class="col1 centeralign" | Flags
 
−
| class="col2 centeralign" | byte
 
−
| class="col3 centeralign" | 5
 
−
| class="col4" |
 
−
|- class="row2"
 
−
| class="col1 centeralign" | Walking speed
 
−
| class="col2 centeralign" | byte
 
−
| class="col3 centeralign" | 12
 
−
| class="col4" |
 
−
|- class="row3"
 
−
| class="col1 centeralign" | Flying speed
 
−
| class="col2 centeralign" | byte
 
−
| class="col3 centeralign" | 25
 
−
| class="col4" |
 
−
|- class="row2"
 
−
! class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 4 bytes
 
−
|}
 
−
 
 
−
=== Player Block Placement (0x0F) ===
 
  
−
{| class="wikitable"
+
{| class="wikitable" {{added}}
−
|- class="row0"
+
! Packet ID
−
! class="col0" | Packet ID
+
! State
−
! class="col1" | Field Name
+
! Bound To
−
! class="col2" | Field Type
+
! colspan="2"| Field Name
−
! class="col3" | Example
+
! colspan="2"| Field Type
−
! class="col4" | Notes
+
! Notes
−
|- class="row1"
+
|-
−
| class="col0 centeralign" rowspan="8" | 0x0F
+
| rowspan="4"| 0x7B
−
| class="col1 centeralign" | X
+
| rowspan="4"| Configuration
−
| class="col2 centeralign" | int
+
| rowspan="4"| Client
−
| class="col3 centeralign" | <code>32</code>
+
| colspan="2"| Links Count
−
| class="col4" | Block position
+
| colspan="2"| {{Type|VarInt}}
−
|- class="row2"
+
| The number of links in the following array.
−
| class="col0 centeralign" | Y
+
|-
−
| class="col1 centeralign" | unsigned byte
+
| rowspan="3"| Links
−
| class="col2 centeralign" | <code>64</code>
+
| Is built-in
−
| class="col3" | Block position
+
| rowspan="3"| {{Type|Array}}
−
|- class="row3"
+
| {{Type|Boolean}}
−
| class="col0 centeralign" | Z
+
| Determines if the following label is built-in (from enum) or custom (text component).
−
| class="col1 centeralign" | int
+
|-
−
| class="col2 centeralign" | <code>32</code>
+
| Label
−
| class="col3 leftalign" | Block position
+
| {{Type|VarInt}} {{Type|Enum}} / {{Type|Text Component}}
−
|- class="row4"
+
| See below.
−
| class="col0 centeralign" | Direction
+
|-
−
| class="col1 centeralign" | byte
+
| URL
−
| class="col2 centeralign" | <code>3</code>
+
| {{Type|String}}
−
| class="col3" | The offset to use for block/item placement (see below)
+
| Valid URL.
−
|- class="row5"
 
−
| class="col0 centeralign" | Held item
 
−
| class="col1 centeralign" | [[Slot_Data|slot]]
 
−
| class="col2 centeralign" |
 
−
| class="col3" |
 
−
|- class="row6"
 
−
| class="col0 centeralign" | Unknown
 
−
| class="col1 centeralign" | byte
 
−
| class="col2 centeralign" | <code>0 - 0x0B</code> (or more)
 
−
| class="col3" | ?
 
−
|- class="row6"
 
−
| class="col0 centeralign" | Unknown
 
−
| class="col1 centeralign" | byte
 
−
| class="col2 centeralign" | <code>0 - 0x10</code>
 
−
| class="col3" | ?
 
−
|- class="row6"
 
−
| class="col0 centeralign" | Unknown
 
−
| class="col1 centeralign" | byte
 
−
| class="col2 centeralign" | <code>0 - 0x10</code>
 
−
| class="col3" | ?
 
−
|- class="row9"
 
−
! class="col0" | Total Size:
 
−
| class="col1 rightalign" colspan="4" | 11 bytes + slot data
 
 
|}
 
|}
  
−
== Protocol History ==
+
{| class="wikitable" {{added}}
−
 
+
! ID
−
=== 2012-06-21 ===
+
! Name
−
* 12w25a
+
! Notes
−
* Packet 0xFC and 0xFD include a 4 byte long byte array. This is hashed with the public RSA key and sent back. See [[Protocol Encryption]] for further info.
+
|-
−
* Packet 0x3E changed to include float rather than byte.
+
| 0
−
 
+
| Bug Report
−
=== 2012-06-14 ===
+
| Displayed on connection error screen; included as a comment in the disconnection report.
−
* 12w24a
+
|-
−
* Protocol version is now 36
+
| 1
−
* Changed Packet 0x01(Login Request), only used as Login Reply
+
| Community Guidelines
−
* New Packet 0xCD used for Login Request and Respawn (1 byte payload)
+
|
−
* All items (except the empty hand) now send enchantment data
+
|-
−
 
+
| 2
−
=== 2012-06-07 ===
+
| Support
−
* 12w23b
+
|
−
* Protocol version is now 35
+
|-
−
* Change packet: Player Block Placement
+
| 3
−
* New Packet: Block breaking animation
+
| Status
−
 
+
|
−
=== 2012-05-24 ===
+
|-
−
* 12w21a
+
| 4
−
* No packet changes but the algorithm was changed to AES128 with the shared key as the IV, will be described in [[Protocol Encryption]]
+
| Feedback
−
 
+
|
−
=== 2012-05-10 ===
+
|-
−
* 12w19a
+
| 5
−
* No packet changes, but an other encryption algorythm is used, described in [[Protocol Encryption]]
+
| Community
−
* The items which are not enchantable in 12w18a are now readded
+
|
−
* Fishing floats, spawned by a 0x17 packet do now use the extra fields
+
|-
 +
| 6
 +
| Website
 +
|
 +
|-
 +
| 7
 +
| Forums
 +
|
 +
|-
 +
| 8
 +
| News
 +
|
 +
|-
 +
| 9
 +
| Announcements
 +
|
 +
|-
 +
|}
  
−
=== 2012-05-03 ===
+
=== Serverbound ===
−
* 12w18a
 
−
* Protocol version is now 32
 
−
* New packet: 0x3D Name Sound Effect
 
−
* Changed packet: 0x01 Login Request
 
−
* Changed packet: 0x02 Handshake
 
−
* Changed packet: 0xCA Player Abilities
 
−
* Changed packet: 0xCC Locale and View Distance
 
−
* Changed packet: 0x09 Respawn
 
−
* Removed packet: 0x32 Map Column Allocation
 
−
* This items are not enchantable in this version: 0x103, 0x105, 0x15A, 0x167, 0x10C, 0x10D, 0x10E, 0x10F, 0x122, 0x110, 0x111, 0x112, 0x113, 0x123, 0x10B, 0x100, 0x101, 0x102, 0x124, 0x114, 0x115, 0x116, 0x117, 0x125, 0x11B, 0x11C, 0x11D, 0x11E, 0x126
 
  
−
=== 2012-04-26 ===
+
No changes so far.
−
* 12w17a
 
−
* Protocol version is now 31
 
−
* RC4 based encryption, described in [[Protocol Encryption]]
 
−
* Changed packet: 0x01 Login Request
 
−
* Changed packet: 0x02 Handshake
 
−
* Changed packet: 0xCC Locale and View Distance
 
−
* Changed packet: 0xCA Player Abilities
 
−
* New packet: 0xFC Encryption Key Response
 
−
* New packet: 0xFD Encryption Key Request
 
−
* New Item: Book & Quills (0x182) is enchantable
 
−
* New Item: Written Book (0x183) is enchantable
 
  
−
=== 2012-04-19 ===
+
[[Category:Minecraft Modern]]
−
* 12w16a
 
−
* Protocol version is now 30
 
−
* New packet: 0xCB Tab-complete
 
−
* New packet: 0xCC Locale and View Distance
 

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"