Difference between revisions of "Pre-release protocol"

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(It was Acknowledge Player Digging (clientbound) that got shifted, not Player Digging (serverbound))
(Updated to 1.21-pre2)
 
(323 intermediate revisions by 35 users not shown)
Line 1: Line 1:
−
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.14.4, protocol 498]]) to the current pre-release (currently [[Protocol version numbers|1.15-pre2, protocol 566]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
+
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.20.6, protocol 766]]) to the current pre-release (currently [[Protocol version numbers|1.21-pre2, protocol {{Snapshot PVN|1073742024}}]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
  
 
One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
 
One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
Line 9: Line 9:
 
=== Data types ===
 
=== Data types ===
  
−
No changes so far.
+
No changes documented so far.
  
 
=== Packets ===
 
=== Packets ===
Line 18: Line 18:
 
  !colspan="2"| Documentation
 
  !colspan="2"| Documentation
 
  |-
 
  |-
−
!colspan="4"| 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|0x03|Spawn Mob}}
+
{{PacketList|0x7A|Clientbound Report Details (play)|rel=added}}
−
{{PacketList|0x05|Spawn Player}}
+
{{PacketList|0x7B|Clientbound Server Links (play)|rel=added}}
−
{{PacketList|{{change|0x5C|0x08}}|Acknowledge Player Digging|pre=unchanged}}
+
|-
−
{{PacketList|{{change|0x08|0x09}}|Block Break Animation|pre=unchanged}}
+
|}
−
{{PacketList|{{change|0x09|0x0A}}|Update Block Entity|pre=unchanged}}
 
−
{{PacketList|{{change|0x0A|0x0B}}|Block Action|pre=unchanged}}
 
−
{{PacketList|{{change|0x0B|0x0C}}|Block Change|pre=unchanged}}
 
−
{{PacketList|{{change|0x0C|0x0D}}|Boss Bar|pre=unchanged}}
 
−
{{PacketList|{{change|0x0D|0x0E}}|Server Difficulty|pre=unchanged}}
 
−
{{PacketList|{{change|0x0E|0x0F}}|Chat Message (clientbound)|pre=unchanged}}
 
−
{{PacketList|{{change|0x0F|0x10}}|Multi Block Change|pre=unchanged}}
 
−
{{PacketList|{{change|0x10|0x11}}|Tab-Complete (clientbound)|pre=unchanged}}
 
−
{{PacketList|{{change|0x11|0x12}}|Declare Commands|pre=unchanged}}
 
−
{{PacketList|{{change|0x12|0x13}}|Confirm Transaction (clientbound)|pre=unchanged}}
 
−
{{PacketList|{{change|0x13|0x14}}|Close Window (clientbound)|pre=unchanged}}
 
−
{{PacketList|{{change|0x14|0x15}}|Window Items|pre=unchanged}}
 
−
{{PacketList|{{change|0x15|0x16}}|Window Property|pre=unchanged}}
 
−
{{PacketList|{{change|0x16|0x17}}|Set Slot|pre=unchanged}}
 
−
{{PacketList|{{change|0x17|0x18}}|Set Cooldown|pre=unchanged}}
 
−
{{PacketList|{{change|0x18|0x19}}|Plugin Message (clientbound)|pre=unchanged}}
 
−
{{PacketList|{{change|0x19|0x1A}}|Named Sound Effect|pre=unchanged}}
 
−
{{PacketList|{{change|0x1A|0x1B}}|Disconnect (play)|pre=unchanged}}
 
−
{{PacketList|{{change|0x1B|0x1C}}|Entity Status|pre=unchanged}}
 
−
{{PacketList|{{change|0x1C|0x1D}}|Explosion|pre=unchanged}}
 
−
{{PacketList|{{change|0x1D|0x1E}}|Unload Chunk|pre=unchanged}}
 
−
{{PacketList|{{change|0x1E|0x1F}}|Change Game State|pre=unchanged}}
 
−
{{PacketList|{{change|0x1F|0x20}}|Open Horse Window|pre=unchanged}}
 
−
{{PacketList|{{change|0x20|0x21}}|Keep Alive (clientbound)|pre=unchanged}}
 
−
{{PacketList|{{change|0x21|0x22}}|Chunk Data}}
 
−
{{PacketList|{{change|0x22|0x23}}|Effect|pre=unchanged}}
 
−
{{PacketList|{{change|0x23|0x24}}|Particle|pre=unchanged}}
 
−
{{PacketList|{{change|0x24|0x25}}|Update Light|pre=unchanged}}
 
−
{{PacketList|{{change|0x25|0x26}}|Join Game}}
 
−
{{PacketList|{{change|0x26|0x27}}|Map Data|pre=unchanged}}
 
−
{{PacketList|{{change|0x27|0x28}}|Trade List|pre=unchanged}}
 
−
{{PacketList|{{change|0x28|0x29}}|Entity Relative Move|pre=unchanged}}
 
−
{{PacketList|{{change|0x29|0x2A}}|Entity Look And Relative Move|pre=unchanged}}
 
−
{{PacketList|{{change|0x2A|0x2B}}|Entity Look|pre=unchanged}}
 
−
{{PacketList|{{change|0x2B|0x2C}}|Entity|pre=unchanged}}
 
−
{{PacketList|{{change|0x2C|0x2D}}|Vehicle Move (clientbound)|pre=unchanged}}
 
−
{{PacketList|{{change|0x2D|0x2E}}|Open Book|pre=unchanged}}
 
−
{{PacketList|{{change|0x2E|0x2F}}|Open Window|pre=unchanged}}
 
−
{{PacketList|{{change|0x2F|0x30}}|Open Sign Editor|pre=unchanged}}
 
−
{{PacketList|{{change|0x30|0x31}}|Craft Recipe Response|pre=unchanged}}
 
−
{{PacketList|{{change|0x31|0x32}}|Player Abilities (clientbound)|pre=unchanged}}
 
−
{{PacketList|{{change|0x32|0x33}}|Combat Event|pre=unchanged}}
 
−
{{PacketList|{{change|0x33|0x34}}|Player Info|pre=unchanged}}
 
−
{{PacketList|{{change|0x34|0x35}}|Face Player|pre=unchanged}}
 
−
{{PacketList|{{change|0x35|0x36}}|Player Position And Look (clientbound)|pre=unchanged}}
 
−
{{PacketList|{{change|0x36|0x37}}|Unlock Recipes|pre=unchanged}}
 
−
{{PacketList|{{change|0x37|0x38}}|Destroy Entities|pre=unchanged}}
 
−
{{PacketList|{{change|0x38|0x39}}|Remove Entity Effect|pre=unchanged}}
 
−
{{PacketList|{{change|0x39|0x3A}}|Resource Pack Send|pre=unchanged}}
 
−
{{PacketList|{{change|0x3A|0x3B}}|Respawn}}
 
−
{{PacketList|{{change|0x3B|0x3C}}|Entity Head Look|pre=unchanged}}
 
−
{{PacketList|{{change|0x3C|0x3D}}|Select Advancement Tab|pre=unchanged}}
 
−
{{PacketList|{{change|0x3D|0x3E}}|World Border|pre=unchanged}}
 
−
{{PacketList|{{change|0x3E|0x3F}}|Camera|pre=unchanged}}
 
−
{{PacketList|{{change|0x3F|0x40}}|Held Item Change (clientbound)|pre=unchanged}}
 
−
{{PacketList|{{change|0x40|0x41}}|Update View Position|pre=unchanged}}
 
−
{{PacketList|{{change|0x41|0x42}}|Update View Distance|pre=unchanged}}
 
−
{{PacketList|{{change|0x42|0x43}}|Display Scoreboard|pre=unchanged}}
 
−
{{PacketList|{{change|0x43|0x44}}|Entity Metadata|pre=unchanged}}
 
−
{{PacketList|{{change|0x44|0x45}}|Attach Entity|pre=unchanged}}
 
−
{{PacketList|{{change|0x45|0x46}}|Entity Velocity|pre=unchanged}}
 
−
{{PacketList|{{change|0x46|0x47}}|Entity Equipment|pre=unchanged}}
 
−
{{PacketList|{{change|0x47|0x48}}|Set Experience|pre=unchanged}}
 
−
{{PacketList|{{change|0x48|0x49}}|Update Health|pre=unchanged}}
 
−
{{PacketList|{{change|0x49|0x4A}}|Scoreboard Objective|pre=unchanged}}
 
−
{{PacketList|{{change|0x4A|0x4B}}|Set Passengers|pre=unchanged}}
 
−
{{PacketList|{{change|0x4B|0x4C}}|Teams|pre=unchanged}}
 
−
{{PacketList|{{change|0x4C|0x4D}}|Update Score|pre=unchanged}}
 
−
{{PacketList|{{change|0x4D|0x4E}}|Spawn Position|pre=unchanged}}
 
−
{{PacketList|{{change|0x4E|0x4F}}|Time Update|pre=unchanged}}
 
−
{{PacketList|{{change|0x4F|0x50}}|Title|pre=unchanged}}
 
−
{{PacketList|{{change|0x50|0x51}}|Entity Sound Effect|pre=unchanged}}
 
−
{{PacketList|{{change|0x51|0x52}}|Sound Effect|pre=unchanged}}
 
−
{{PacketList|{{change|0x52|0x53}}|Stop Sound|pre=unchanged}}
 
−
{{PacketList|{{change|0x53|0x54}}|Player List Header And Footer|pre=unchanged}}
 
−
{{PacketList|{{change|0x54|0x55}}|NBT Query Response|pre=unchanged}}
 
−
{{PacketList|{{change|0x55|0x56}}|Collect Item|pre=unchanged}}
 
−
{{PacketList|{{change|0x56|0x57}}|Entity Teleport|pre=unchanged}}
 
−
{{PacketList|{{change|0x57|0x58}}|Advancements|pre=unchanged}}
 
−
{{PacketList|{{change|0x58|0x59}}|Entity Properties|pre=unchanged}}
 
−
{{PacketList|{{change|0x59|0x5A}}|Entity Effect|pre=unchanged}}
 
−
{{PacketList|{{change|0x5A|0x5B}}|Declare Recipes|pre=unchanged}}
 
−
{{PacketList|{{change|0x5B|0x5C}}|Tags|pre=unchanged}}
 
−
|}
 
  
−
== New/modified data types ==
+
== Handshake ==
  
 
No changes so far.
 
No changes so far.
  
−
== Entity Metadata ==
+
== Status ==
 +
 
 +
No changes so far.
  
−
{{warning2|Lots of shifts, of course}}
+
== Login ==
  
−
=== Living ===
+
No changes so far.
  
−
Extends [[#Entity|Entity]].
+
== Configuration ==
  
−
{| class="wikitable"
+
=== Clientbound ===
−
! Index
 
−
! Type
 
−
!style="width: 250px;" colspan="2"| Meaning
 
−
! Default
 
−
|-
 
−
|rowspan="5"| 7
 
−
|rowspan="5"| Byte
 
−
|colspan="2"| Hand states, used to trigger blocking/eating/drinking animation.
 
−
|rowspan="5"| 0
 
−
|-
 
−
! Bit mask
 
−
! Meaning
 
−
|-
 
−
| 0x01
 
−
| Is hand active
 
−
|-
 
−
| 0x02
 
−
| Active hand (0 = main hand, 1 = offhand)
 
−
|-
 
−
| 0x04
 
−
| In riptide spin attack
 
−
|-
 
−
| 8
 
−
| Float
 
−
|colspan="2"| Health
 
−
| 1.0
 
−
|-
 
−
| 9
 
−
| VarInt
 
−
|colspan="2"| Potion effect color (or 0 if there is no effect)
 
−
| 0
 
−
|-
 
−
| 10
 
−
| Boolean
 
−
|colspan="2"| Is potion effect ambient: reduces the number of particles generated by potions to 1/5 the normal amount
 
−
| false
 
−
|-
 
−
| 11
 
−
| VarInt
 
−
|colspan="2"| Number of arrows in entity
 
−
| 0
 
−
|- {{Added}}
 
−
| 12
 
−
| VarInt
 
−
|colspan="2"| Unknown
 
−
| 0
 
−
|-
 
−
| {{change|12|13}}
 
−
| OptBlockPos
 
−
|colspan="2"| Unknown (Bed location?)
 
−
| Absent
 
−
|}
 
  
−
=== Bee ===
+
==== Clientbound Report Details (configuration) ====
  
−
Extends [[#Insentient|Insentient]].
+
Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.
  
 
{| class="wikitable" {{added}}
 
{| class="wikitable" {{added}}
−
  ! Index
+
  ! Packet ID
−
  ! Type
+
  ! State
−
  !style="width: 250px;" colspan="2"| Meaning
+
  ! Bound To
−
  ! Default
+
  ! colspan="2"| Field Name
−
|-
+
  ! colspan="2"| Field Type
−
| 16
+
  ! Notes
−
| Byte
 
−
|colspan="2"| Unknown
 
−
  | 0
 
−
|-
 
−
| 17
 
−
| VarInt
 
−
|colspan="2"| Unknown
 
−
| 0
 
−
|}
 
−
 
 
−
=== Wolf ===
 
−
 
 
−
Extends [[#TameableAnimal|TameableAnimal]].
 
−
 
 
−
{| class="wikitable"
 
−
! Index
 
−
! Type
 
−
  !style="width: 250px;" colspan="2"| Meaning
 
−
! Default
 
−
|- {{removed}}
 
−
| {{change|17|18}}
 
−
| Float
 
−
|colspan="2"| Damage taken (used for tail rotation)
 
−
| Value of health field (1.0)
 
−
|-
 
−
| 18
 
−
| Boolean
 
−
|colspan="2"| Is begging
 
−
| false
 
 
  |-
 
  |-
−
  | 19
+
  | rowspan="3"| 0x0F
−
| VarInt
+
  | rowspan="3"| Configuration
−
  |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
+
  | rowspan="3"| Client
−
| 14 (Red)
+
| colspan="2"| Details Count
−
  |}
+
  | colspan="2"| {{Type|VarInt}} (32)
−
 
+
  | The number of details in the following array.
−
=== Enderman ===
 
−
 
 
−
Extends [[#Monster|Monster]].
 
−
 
 
−
{| class="wikitable"
 
−
  ! Index
 
−
! Type
 
−
!style="width: 250px;" colspan="2"| Meaning
 
−
  ! Default
 
 
  |-
 
  |-
−
  | 15
+
  | rowspan="2"| Details
−
  | Opt BlockID
+
  | Title
−
  |colspan="2"| Carried block
+
  | rowspan="2"| {{Type|Array}}
−
  | Absent
+
| {{Type|String}} (128)
 +
  |
 
  |-
 
  |-
−
  | 16
+
  | Description
−
  | Boolean
+
  | {{Type|String}} (4096)
−
|colspan="2"| Is screaming
+
  |
−
| false
+
|}
−
|- {{added}}
 
−
  | 17
 
−
| Boolean
 
−
|colspan="2"| Unknown
 
−
| false
 
−
|}
 
  
−
=== Trident ===
+
==== Clientbound Server Links (configuration) ====
  
−
Extends [[#Arrow|Arrow]].
+
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}}
−
! Index
 
−
! Type
 
−
!style="width: 250px;" colspan="2"| Meaning
 
−
! Default
 
−
|-
 
−
| 10
 
−
| VarInt
 
−
|colspan="2"| Loyalty level (enchantment)
 
−
| 0
 
−
|- {{Added}}
 
−
| 11
 
−
| Boolean
 
−
|colspan="2"| Unknown
 
−
| False
 
−
|}
 
−
 
 
−
 
 
−
== Block Actions ==
 
−
 
 
−
No changes so far.
 
−
 
 
−
== Inventories ==
 
−
 
 
−
No changes so far.
 
−
 
 
−
== Plugin Channels ==
 
−
 
 
−
No changes so far.
 
−
 
 
−
== Play ==
 
−
 
 
−
=== Clientbound ===
 
−
==== Spawn Mob ====
 
−
 
 
−
Sent by the server when a mob entity is spawned.
 
−
 
 
−
{| 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="13"| 0x03
+
  | rowspan="4"| 0x10
−
  |rowspan="13"| Play
+
  | rowspan="4"| Configuration
−
  |rowspan="13"| Client
+
  | rowspan="4"| Client
−
  | Entity ID
+
  | colspan="2"| Links Count
−
  | VarInt
+
  | colspan="2"| {{Type|VarInt}}
−
  |  
+
  | The number of links in the following array.
 
  |-
 
  |-
−
  | Entity UUID
+
  | rowspan="3"| Links
−
  | UUID
+
| Is built-in
−
  |  
+
| rowspan="3"| {{Type|Array}}
 +
  | {{Type|Boolean}}
 +
  | Determines if the following label is built-in (from enum) or custom (text component).
 
  |-
 
  |-
−
  | Type
+
  | Label
−
  | VarInt
+
  | {{Type|VarInt}} {{Type|Enum}} / {{Type|Text Component}}
−
  | The type of mob. See [[Entities#Mobs]]
+
  | See below.
 
  |-
 
  |-
−
  | X
+
  | URL
−
  | Double
+
  | {{Type|String}}
−
  |  
+
  | Valid URL.
 +
|}
 +
 
 +
 
 +
{| class="wikitable" {{added}}
 +
! ID
 +
! Name
 +
! Notes
 
  |-
 
  |-
−
  | Y
+
  | 0
−
  | Double
+
  | Bug Report
−
  |  
+
  | Displayed on connection error screen; included as a comment in the disconnection report.
 
  |-
 
  |-
−
  | Z
+
  | 1
−
  | Double
+
  | Community Guidelines
 
  |  
 
  |  
 
  |-
 
  |-
−
  | Yaw
+
  | 2
−
  | Angle
+
  | Support
 
  |  
 
  |  
 
  |-
 
  |-
−
  | Pitch
+
  | 3
−
  | Angle
+
  | Status
 
  |  
 
  |  
 
  |-
 
  |-
−
  | Head Pitch
+
  | 4
−
  | Angle
+
  | Feedback
 
  |  
 
  |  
 
  |-
 
  |-
−
  | Velocity X
+
  | 5
−
  | Short
+
  | Community
−
| Same units as [[#Entity Velocity|Entity Velocity]]
 
−
|-
 
−
| Velocity Y
 
−
| Short
 
−
| Same units as [[#Entity Velocity|Entity Velocity]]
 
−
|-
 
−
| Velocity Z
 
−
| Short
 
−
| Same units as [[#Entity Velocity|Entity Velocity]]
 
−
|- {{removed}}
 
−
| Metadata
 
−
| [[Entities#Entity Metadata Format|Entity Metadata]]
 
 
  |  
 
  |  
−
|}
 
−
 
−
==== Spawn Player ====
 
−
 
−
This packet is sent by the server when a player comes into visible range, ''not'' when a player joins.
 
−
 
−
This packet must be sent after the [[#Player Info|Player Info]] packet that adds the player data for the client to use when spawning a player. If the Player Info for the player spawned by this packet is not present when this packet arrives, Notchian clients will not spawn the player entity. The Player Info packet includes skin/cape data.
 
−
 
−
Servers can, however, safely spawn player entities for players not in visible range. The client appears to handle it correctly.
 
−
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
 
  |-
 
  |-
−
  |rowspan="8"| 0x05
+
  | 6
−
|rowspan="8"| Play
+
  | Website
−
|rowspan="8"| Client
 
−
| Entity ID
 
−
| VarInt
 
−
| Player's EID
 
−
|-
 
−
| Player UUID
 
−
| UUID
 
−
| See below for notes on {{Minecraft Wiki|Server.properties#online-mode|offline mode}} and NPCs
 
−
|-
 
−
| X
 
−
  | Double
 
 
  |  
 
  |  
 
  |-
 
  |-
−
  | Y
+
  | 7
−
  | Double
+
  | Forums
 
  |  
 
  |  
 
  |-
 
  |-
−
  | Z
+
  | 8
−
  | Double
+
  | News
 
  |  
 
  |  
 
  |-
 
  |-
−
  | Yaw
+
  | 9
−
  | Angle
+
  | Announcements
 
  |  
 
  |  
 
  |-
 
  |-
−
| Pitch
 
−
| Angle
 
−
|
 
−
|- {{removed}}
 
−
| Metadata
 
−
| [[Entities#Entity Metadata Format|Entity Metadata]]
 
−
|
 
 
  |}
 
  |}
  
−
When in {{Minecraft Wiki|Server.properties#online-mode|online mode}}, the UUIDs must be valid and have valid skin blobs.
+
=== Serverbound ===
  
−
In offline mode, [[Wikipedia:Universally unique identifier#Versions 3 and 5 (namespace name-based)|UUID v3]] is used with the String <code>OfflinePlayer:&lt;player name&gt;</code>, encoded in UTF-8 (and case-sensitive).
+
No changes so far.
  
−
For NPCs UUID v2 should be used. Note:
+
== Play ==
  
−
<+Grum> i will never confirm this as a feature you know that :)
+
=== Clientbound ===
  
−
In an example UUID, <code>xxxxxxxx-xxxx-Yxxx-xxxx-xxxxxxxxxxxx</code>, the UUID version is specified by <code>Y</code>. So, for UUID v3, <code>Y</code> will always be <code>3</code>, and for UUID v2, <code>Y</code> will always be <code>2</code>.
+
==== Clientbound Report Details (play) ====
  
−
==== Update Block Entity ====
+
Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.
  
−
Sets the block entity associated with the block at the given location.
+
{| 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="3"| {{change|0x09|0x0A}}
+
  | rowspan="3"| 0x7A
−
  |rowspan="3"| Play
+
  | rowspan="3"| Configuration
−
  |rowspan="3"| Client
+
  | rowspan="3"| Client
−
  | Location
+
  | colspan="2"| Details Count
−
  | Position
+
  | colspan="2"| {{Type|VarInt}} (32)
−
  |  
+
  | The number of details in the following array.
 
  |-
 
  |-
−
  | Action
+
  | rowspan="2"| Details
−
  | Unsigned Byte
+
| Title
−
  | The type of update to perform, see below
+
| rowspan="2"| {{Type|Array}}
 +
  | {{Type|String}} (128)
 +
  |
 
  |-
 
  |-
−
  | NBT Data
+
  | Description
−
  | [[NBT|NBT Tag]]
+
  | {{Type|String}} (4096)
−
  | Data to set.  May be a TAG_END (0), in which case the block entity at the given location is removed (though this is not required since the client will remove the block entity automatically on chunk unload or block removal)
+
  |
−
|}
+
|}
  
−
''Action'' field:
+
==== Clientbound Server Links (play) ====
  
−
* '''1''': Set data of a mob spawner (everything except for SpawnPotentials: current delay, min/max delay, mob to be spawned, spawn count, spawn range, etc.)
+
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).
−
* '''2''': Set command block text (command and last execution status)
 
−
* '''3''': Set the level, primary, and secondary powers of a beacon
 
−
* '''4''': Set rotation and skin of mob head
 
−
* '''5''': Declare a conduit
 
−
* '''6''': Set base color and patterns on a banner
 
−
* '''7''': Set the data for a Structure tile entity
 
−
* '''8''': Set the destination for a end gateway
 
−
* '''9''': Set the text on a sign
 
−
* '''10''': Unused
 
−
* '''11''': Declare a bed
 
−
* '''12''': Set data of a jigsaw block
 
−
* '''13''': Set items in a campfire
 
−
* {{change||'''14''': Beehive information}}
 
  
−
==== Chunk Data ====
+
{| class="wikitable" {{added}}
−
{{Main|Chunk Format}}
 
−
{{See also|#Unload Chunk}}
 
−
 
 
−
{{Need Info|How do biomes work now?  The biome change happened at the same time as the seed change, but it's not clear how/if biomes could be computed given that it's not the actual seed...}}
 
−
 
 
−
The server only sends skylight information for chunk pillars in the {{Minecraft Wiki|Overworld}}, it's up to the client to know in which dimenison the player is currently located. You can also infer this information from the primary bitmask and the amount of uncompressed bytes sent.  This packet also sends all block entities in the chunk (though sending them is not required; it is still legal to send them with [[#Update Block Entity|Update Block Entity]] later).
 
−
 
 
−
{| 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="10"| {{change|0x21|0x22}}
+
  | rowspan="4"| 0x7B
−
  |rowspan="10"| Play
+
  | rowspan="4"| Configuration
−
  |rowspan="10"| Client
+
  | rowspan="4"| Client
−
  | Chunk X
+
  | colspan="2"| Links Count
−
| Int
+
  | colspan="2"| {{Type|VarInt}}
−
  | Chunk coordinate (block coordinate divided by 16, rounded down)
+
  | The number of links in the following array.
−
|-
 
−
| Chunk Z
 
−
| Int
 
−
| Chunk coordinate (block coordinate divided by 16, rounded down)
 
−
|-
 
−
| Full chunk
 
−
| Boolean
 
−
| See [[Chunk Format#Full chunk|Chunk Format]]
 
−
|-
 
−
| Primary Bit Mask
 
−
| VarInt
 
−
  | Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
 
−
|-
 
−
| Heightmaps
 
−
| [[NBT]]
 
−
| Compound containing one long array named <code>MOTION_BLOCKING</code>, which is a heightmap for the highest solid block at each position in the chunk (as a compacted long array with 256 entries at 9 bits per entry totaling 36 longs). The Notchian server also adds a <code>WORLD_SURFACE</code> long array, the purpose of which is unknown, but it's not required for the chunk to be accepted.
 
−
|- {{Added}}
 
−
| Biomes
 
−
| Optional array of Integer
 
−
| 1024 biome IDs, ordered by x then z then d, in 4&times;4&times;4 blocks.  Not present if full chunk is false.
 
−
|-
 
−
| Size
 
−
| VarInt
 
−
| Size of Data in bytes
 
 
  |-
 
  |-
−
  | Data
+
  | rowspan="3"| Links
−
  | Byte array
+
| Is built-in
−
  | See [[Chunk Format#Data structure|data structure]] in Chunk Format
+
  | rowspan="3"| {{Type|Array}}
 +
  | {{Type|Boolean}}
 +
| Determines if the following label is built-in (from enum) or custom (text component).
 
  |-
 
  |-
−
  | Number of block entities
+
  | Label
−
  | VarInt
+
  | {{Type|VarInt}} {{Type|Enum}} / {{Type|Text Component}}
−
  | Number of elements in the following array
+
  | See below.
 
  |-
 
  |-
−
  | Block entities
+
  | URL
−
  | Array of [[NBT|NBT Tag]]
+
  | {{Type|String}}
−
  | All block entities in the chunk.  Use the x, y, and z tags in the NBT to determine their positions.
+
  | Valid URL.
−
|}
+
|}
  
−
Note that the Notchian client requires an [[#Update View Position|Update View Position]] packet when it crosses a chunk border, otherwise it'll only display render distance + 2 chunks around the chunk it spawned in.
+
{| class="wikitable" {{added}}
−
 
+
  ! ID
−
{{Change||To get the biome at a coordinate, use <code>biomes[((y >> 2) & 63) << 4 {{!}} ((z >> 2) & 3) << 2 {{!}} ((x >> 2) & 3)]</code>}}
+
  ! Name
−
 
 
−
==== Join Game ====
 
−
 
 
−
See [[Protocol Encryption]] for information on logging in.
 
−
 
 
−
{| class="wikitable"
 
−
  ! Packet ID
 
−
  ! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  |rowspan="9"| {{change|0x25|0x26}}
+
  | 0
−
|rowspan="9"| Play
+
  | Bug Report
−
|rowspan="9"| Client
+
  | Displayed on connection error screen; included as a comment in the disconnection report.
−
| Entity ID
 
−
  | Int
 
−
  | The player's Entity ID (EID)
 
 
  |-
 
  |-
−
  | Gamemode
+
  | 1
−
  | Unsigned Byte
+
  | Community Guidelines
−
  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. Bit 3 (0x8) is the hardcore flag.
+
  |  
 
  |-
 
  |-
−
  | Dimension
+
  | 2
−
  | Int Enum
+
  | Support
−
  | -1: Nether, 0: Overworld, 1: End; also, note that this is not a VarInt but instead a regular int.
+
  |  
−
|- {{Added}}
 
−
| Hashed seed
 
−
| Long
 
−
| First 8 bytes of the SHA-256 hash of the world's seed.
 
 
  |-
 
  |-
−
  | Max Players
+
  | 3
−
  | Unsigned Byte
+
  | Status
−
  | Was once used by the client to draw the player list, but now is ignored
+
  |  
 
  |-
 
  |-
−
  | Level Type
+
  | 4
−
  | String Enum (16)
+
  | Feedback
−
  | default, flat, largeBiomes, amplified, customized, buffet, default_1_1
+
  |  
 
  |-
 
  |-
−
  | View Distance
+
  | 5
−
  | VarInt
+
  | Community
−
  | Render distance (2-32)
+
  |  
 
  |-
 
  |-
−
  | Reduced Debug Info
+
  | 6
−
  | Boolean
+
  | Website
−
  | If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}.  For servers in development, this should almost always be false.
+
  |  
 
  |-
 
  |-
−
  | Unknown
+
  | 7
−
  | Boolean
+
  | Forums
−
  | Added
+
  |  
−
|}
 
−
 
 
−
==== Respawn ====
 
−
 
 
−
To change the player's dimension (overworld/nether/end), send them a respawn packet with the appropriate dimension, followed by prechunks/chunks for the new dimension, and finally a position and look packet. You do not need to unload chunks, the client will do it automatically.
 
−
 
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
 
  |-
 
  |-
−
  |rowspan="4"| {{change|0x3A|0x3B}}
+
  | 8
−
|rowspan="4"| Play
+
  | News
−
|rowspan="4"| Client
+
  |  
−
| Dimension
 
−
| Int Enum
 
−
| -1: The Nether, 0: The Overworld, 1: The End
 
−
|- {{Added}}
 
−
  | Hashed seed
 
−
  | Long
 
−
| First 8 bytes of the SHA-256 hash of the world's seed.
 
 
  |-
 
  |-
−
  | Gamemode
+
  | 9
−
  | Unsigned Byte
+
  | Announcements
−
  | 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included
+
  |  
 
  |-
 
  |-
−
| Level Type
 
−
| String (16)
 
−
| Same as [[#Join Game|Join Game]]
 
 
  |}
 
  |}
−
 
−
{{Warning2|Avoid changing player's dimension to same dimension they were already in unless they are dead. If you change the dimension to one they are already in, weird bugs can occur, such as the player being unable to attack other players in new world (until they die and respawn).
 
−
 
−
If you must respawn a player in the same dimension without killing them, send two respawn packets, one to a different world and then another to the world you want. You do not need to complete the first respawn; it only matters that you send two packets.}}
 
  
 
=== Serverbound ===
 
=== Serverbound ===
  
 
No changes so far.
 
No changes so far.
−
 
−
== Handshaking ==
 
−
 
−
=== Clientbound ===
 
−
 
−
There are no clientbound packets in the Handshaking state, since the protocol immediately switches to a different state after the client sends the first packet.
 
−
 
−
=== Serverbound ===
 
−
 
−
==== 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|498|566}})
 
−
|-
 
−
| Server Address
 
−
| String
 
−
| Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect. The Notchian server does not use this information. Note that SRV records are a complete redirect, e.g. if _minecraft._tcp.example.com points to mc.example.org, users connecting to example.com will provide mc.example.org as server address in addition to connecting to it.
 
−
|-
 
−
| Server Port
 
−
| Unsigned Short
 
−
| Default is 25565.  The Notchian server does not use this information.
 
−
|-
 
−
| Next State
 
−
| VarInt Enum
 
−
| 1 for [[#Status|status]], 2 for [[#Login|login]]
 
−
|}
 
−
 
−
== Status ==
 
−
 
−
=== Clientbound ===
 
−
 
−
No changes so far.
 
−
 
−
=== Serverbound ===
 
−
 
−
No changes so far.
 
−
 
−
== Login ==
 
−
 
−
=== Clientbound ===
 
−
 
−
No changes so far.
 
−
 
−
=== Serverbound ===
 
−
 
−
No changes so far.
 
−
 
  
 
[[Category:Minecraft Modern]]
 
[[Category:Minecraft Modern]]

Latest revision as of 10:40, 8 June 2024

This page documents the changes from the last stable Minecraft release (currently 1.20.6, protocol 766) to the current pre-release (currently 1.21-pre2, protocol Snapshot 200). Note that this page contains bleeding-edge information that may not be completely or correctly documented.

One who wishes to commandeer the merging of this into Protocol when an update is made must be sure to respect any changes that may have occurred to the respective packets there.

Contents

Data types

No changes documented so far.

Packets

ID Packet name Documentation
Configuration clientbound
0x0F Clientbound Report Details (configuration) Pre
0x10 Clientbound Server Links (configuration) Pre
Play clientbound
0x7A Clientbound Report Details (play) Pre
0x7B Clientbound Server Links (play) Pre

Handshake

No changes so far.

Status

No changes so far.

Login

No changes so far.

Configuration

Clientbound

Clientbound Report Details (configuration)

Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.

Packet ID State Bound To Field Name Field Type Notes
0x0F Configuration Client Details Count VarInt (32) The number of details in the following array.
Details Title Array String (128)
Description String (4096)

Clientbound Server Links (configuration)

This packet contains a list of links that the Notchian client will display in the menu available from the pause menu. Link labels can be built-in or custom (i.e., any text).

Packet ID State Bound To Field Name Field Type Notes
0x10 Configuration Client Links Count VarInt The number of links in the following array.
Links Is built-in Array Boolean Determines if the following label is built-in (from enum) or custom (text component).
Label VarInt Enum / Text Component See below.
URL String Valid URL.


ID Name Notes
0 Bug Report Displayed on connection error screen; included as a comment in the disconnection report.
1 Community Guidelines
2 Support
3 Status
4 Feedback
5 Community
6 Website
7 Forums
8 News
9 Announcements

Serverbound

No changes so far.

Play

Clientbound

Clientbound Report Details (play)

Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.

Packet ID State Bound To Field Name Field Type Notes
0x7A Configuration Client Details Count VarInt (32) The number of details in the following array.
Details Title Array String (128)
Description String (4096)

Clientbound Server Links (play)

This packet contains a list of links that the Notchian client will display in the menu available from the pause menu. Link labels can be built-in or custom (i.e., any text).

Packet ID State Bound To Field Name Field Type Notes
0x7B Configuration Client Links Count VarInt The number of links in the following array.
Links Is built-in Array Boolean Determines if the following label is built-in (from enum) or custom (text component).
Label VarInt Enum / Text Component See below.
URL String Valid URL.
ID Name Notes
0 Bug Report Displayed on connection error screen; included as a comment in the disconnection report.
1 Community Guidelines
2 Support
3 Status
4 Feedback
5 Community
6 Website
7 Forums
8 News
9 Announcements

Serverbound

No changes so far.

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