Difference between revisions of "Pre-release protocol"

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(Held Item Change uses a different packet id.)
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This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.8.8, protocol 47]]) to the current pre-release (currently [[Protocol version numbers|15w31a, protocol 49]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
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There are currently no pre-release versions available to document on this page. For the latest stable Minecraft release, see the [[Protocol|Protocol]] page. For previous pre-release pages, see the [[Protocol version numbers|Protocol version numbers]] page.
  
 
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.
  
== Protocol history ==
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== Contents ==
  
None so far.
+
<div style="float:right;">__TOC__</div>
  
== New/modified data types ==
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=== Data types ===
 
 
None so far.
 
 
 
== Handshaking ==
 
 
 
=== Clientbound ===
 
  
 
No changes so far.
 
No changes so far.
  
=== Serverbound ===
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=== Packets ===
 
 
==== Handshake ====
 
 
 
This causes the server to switch into the target state.
 
 
 
{| 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|47|49}})
 
|-
 
| 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
 
| 1 for [[#Status|status]], 2 for [[#Login|login]]
 
|}
 
 
 
== Play ==
 
 
 
=== Clientbound ===
 
  
 
No changes so far.
 
No changes so far.
  
=== Serverbound ===
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[[Category:Minecraft Modern]]
 
 
==== Player Digging ====
 
 
 
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.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| 0x07
 
|rowspan="3"| Play
 
|rowspan="3"| Server
 
| Status
 
| Byte
 
| The action the player is taking against the block (see below)
 
|-
 
| Location
 
| Position
 
| Block position
 
|-
 
| Face
 
| Byte
 
| The face being hit (see below)
 
|}
 
 
 
Status can (currently) be one of six values:
 
 
 
{| class="wikitable"
 
! Meaning
 
! Value
 
|-
 
| Started digging
 
| <code>0</code>
 
|-
 
| Cancelled digging
 
| <code>1</code>
 
|-
 
| Finished digging
 
| <code>2</code>
 
|-
 
| Drop item stack
 
| <code>3</code>
 
|-
 
| Drop item
 
| <code>4</code>
 
|-
 
| Shoot arrow / finish eating
 
| <code>5</code>
 
|-
 
| Swap item in Hand
 
| <code>6</code>
 
|}
 
 
 
Notchian clients send a 0 (started digging) when they start digging and a 2 (finished digging) once they think they are finished. If digging is aborted, the client simply send a 1 (cancel digging).
 
 
 
Status code 4 (drop item) is a special case. In-game, when you use the Drop Item command (keypress 'q'), a dig packet with a status of 4, and all other values set to 0, is sent from client to server. Status code 3 is similar, but drops the entire stack.
 
 
 
Status code 5 (shoot arrow / finish eating) is also a special case. The x, y and z fields are all set to 0 like above, with the exception of the face field, which is set to 255.
 
 
 
Status code 6 is another special case. Used to swap or assign an item to the second hand. The rest of the fields (x, y, z and face) are all set to 0.
 
 
 
The face can be one of six values, representing the face being hit:
 
 
 
{| class="wikitable"
 
|-
 
! Value
 
| 0
 
| 1
 
| 2
 
| 3
 
| 4
 
| 5
 
|-
 
! Offset
 
| -Y
 
| +Y
 
| -Z
 
| +Z
 
| -X
 
| +X
 
|}
 
 
 
 
 
==== Held Item Change ====
 
 
 
Sent when the player changes the slot selection
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| {{Change|0x09|0x0A}}
 
|rowspan="1"| Play
 
|rowspan="1"| Server
 
| Slot
 
| Short
 
| The slot which the player has selected (0–8)
 
|}
 
 
 
== Status ==
 
 
 
=== Clientbound ===
 
 
 
No changes so far.
 
 
 
=== Serverbound ===
 
 
 
No changes so far.
 
 
 
== Login ==
 
 
 
=== Clientbound ===
 
 
 
No changes so far.
 
 
 
=== Serverbound ===
 
 
 
No changes so far.
 

Latest revision as of 16:42, 29 June 2024

There are currently no pre-release versions available to document on this page. For the latest stable Minecraft release, see the Protocol page. For previous pre-release pages, see the Protocol version numbers page.

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 so far.

Packets

No changes so far.