Difference between revisions of "Pre-release protocol"

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(24w03a)
(Updated to 1.21-pre2)
 
(20 intermediate revisions by 6 users not shown)
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−
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.20.4, protocol 765]]) to the current pre-release (currently [[Protocol version numbers|24w03a, protocol {{Snapshot PVN|1073741995}}]]). 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 17: Line 17:
 
  ! Packet name
 
  ! Packet name
 
  !colspan="2"| Documentation
 
  !colspan="2"| Documentation
−
|-
 
−
!colspan="4"| Handshake serverbound
 
−
{{PacketList|0x00|Handshake}}
 
−
|-
 
−
!colspan="4"| Login clientbound
 
−
{{PacketList|0x05|Cookie Request (Login)|rel=added}}
 
−
|-
 
−
!colspan="4"| Login serverbound
 
−
{{PacketList|0x04|Cookie Response (Login)|rel=added}}
 
 
  |-
 
  |-
 
  !colspan="4"| Configuration clientbound
 
  !colspan="4"| Configuration clientbound
−
  {{PacketList|0x00|Cookie Request (Configuration)|rel=added}}
+
  {{PacketList|0x0F|Clientbound Report Details (configuration)|rel=added}}
−
|-
+
  {{PacketList|0x10|Clientbound Server Links (configuration)|rel=added}}
−
!colspan="4"| Configuration serverbound
 
−
  {{PacketList|0x01|Cookie Response (Configuration)|rel=added}}
 
 
  |-
 
  |-
 
  !colspan="4"| Play clientbound
 
  !colspan="4"| Play clientbound
−
  {{PacketList|0x16|Cookie Request (Play)|rel=added}}
+
  {{PacketList|0x7A|Clientbound Report Details (play)|rel=added}}
−
  {{PacketList|0x6A|Store Cookie|rel=added}}
+
  {{PacketList|0x7B|Clientbound Server Links (play)|rel=added}}
−
{{PacketList|0x72|Transfer|rel=added}}
 
−
{{PacketList|0x74|Update Attributes}}
 
−
{{PacketList|0x75|Entity Effect}}
 
 
  |-
 
  |-
−
!colspan="4"| Play serverbound
+
|}
−
{{PacketList|0x10|Cookie Response (Play)|rel=added}}
 
−
|}
 
  
−
== New/modified data types ==
+
== Handshake ==
−
 
 
−
No changes so far.
 
−
 
 
−
== Entity Metadata ==
 
−
 
 
−
{| class="wikitable"
 
−
! Type ([[Data Types#Definitions:varint|VarInt]] Enum)
 
−
! Value (Varies)
 
−
! Notes
 
−
|-
 
−
| 0
 
−
| [[Data Types#Definitions:byte|Byte]]
 
−
|
 
−
|-
 
−
| 1
 
−
| [[Data Types#Definitions:varint|VarInt]]
 
−
|
 
−
|-
 
−
| 2
 
−
| [[Data Types#Definitions:varlong|VarLong]]
 
−
|
 
−
|-
 
−
| 3
 
−
| [[Data Types#Definitions:float|Float]]
 
−
|
 
−
|-
 
−
| 4
 
−
| [[Data Types#Definitions:string|String]]
 
−
|
 
−
|-
 
−
| 5
 
−
| [[Data Types#Definitions:chat|Chat]]
 
−
|
 
−
|-
 
−
| 6
 
−
| OptChat (Boolean + [[Data Types#Definitions:chat|Chat]])
 
−
| [[Data Types#Definitions:chat|Chat]] is present if the Boolean is set to true
 
−
|-
 
−
| 7
 
−
| [[Data Types#Definitions:slot|Slot]]
 
−
|
 
−
|-
 
−
| 8
 
−
| [[Data Types#Definitions:boolean|Boolean]]
 
−
|
 
−
|-
 
−
| 9
 
−
| [[Data Types#Definitions:rotation|Rotation]]
 
−
| 3 [[Data Types#Definitions:float|Floats]]: rotation on x, rotation on y, rotation on z
 
−
|-
 
−
| 10
 
−
| [[Data Types#Position|Position]]
 
−
|
 
−
|-
 
−
| 11
 
−
| OptPosition (Boolean + Position)
 
−
| Position is present if the Boolean is set to true
 
−
|-
 
−
| 12
 
−
| Direction ([[Data Types#Definitions:varint|VarInt]])
 
−
| (Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5)
 
−
|-
 
−
| 13
 
−
| OptUUID (Boolean + UUID)
 
−
| UUID is present if the Boolean is set to true
 
−
|-
 
−
| 14
 
−
| BlockID ([[Data Types#Definitions:varint|VarInt]])
 
−
|-
 
−
| 15
 
−
| OptBlockID ([[Data Types#Definitions:varint|VarInt]])
 
−
| 0 for absent (implies air); otherwise, a block state ID as per the block state registry
 
−
|-
 
−
| 16
 
−
| [[Data_types#Definitions:nbt|NBT]]
 
−
|
 
−
|-
 
−
| 17
 
−
| [[Data Types#Particle|Particle]]
 
−
|
 
−
|-
 
−
| 18
 
−
| Villager Data
 
−
| 3 [[Data Types#Definitions:varint|VarInts]]: villager type, villager profession, level
 
−
|-
 
−
| 19
 
−
| OptVarInt
 
−
| 0 for absent; 1 + actual value otherwise.  Used for entity IDs.
 
−
|-
 
−
| 20
 
−
| Pose
 
−
| A [[Data Types#Definitions:varint|VarInt]] enum: 0: STANDING, 1: FALL_FLYING, 2: SLEEPING, 3: SWIMMING, 4: SPIN_ATTACK, 5: SNEAKING, 6: LONG_JUMPING, 7: DYING, 8: CROAKING, 9: USING_TONGUE, 10: SITTING, 11: ROARING, 12: SNIFFING, 13: EMERGING, 14: DIGGING
 
−
|-
 
−
| 21
 
−
| Cat Variant
 
−
| A [[Data Types#Definitions:varint|VarInt]] that points towards the CAT_VARIANT registry.
 
−
|-
 
−
| 22
 
−
| Frog Variant
 
−
| A [[Data Types#Definitions:varint|VarInt]] that points towards the FROG_VARIANT registry.
 
−
|-
 
−
| 23
 
−
| OptGlobalPos (Boolean + GlobalPos)
 
−
| GlobalPos consists of a dimension identifier and [[Data Types#Position|Position]].
 
−
|-
 
−
| 24
 
−
| Painting Variant
 
−
| A [[Data Types#Definitions:varint|VarInt]] that points towards the PAINTING_VARIANT registry.
 
−
|-
 
−
| 25
 
−
| Sniffer State
 
−
| A [[Data Types#Definitions:varint|VarInt]] enum: IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
 
−
|- {{added}}
 
−
| 26
 
−
| Armadillo State
 
−
| A [[Data Types#Definitions:varint|VarInt]] enum: IDLE = 0, ROLLING = 1, SCARED = 2
 
−
|-
 
−
| {{change|26|27}}
 
−
| Vector3
 
−
| 3 [[Data Types#Definitions:float|Floats]]: x, y, z
 
−
|-
 
−
| {{change|27|28}}
 
−
| Quaternion
 
−
| 4 [[Data Types#Definitions:float|Floats]]: x, y, z, w
 
−
|-
 
−
|}
 
−
 
 
−
=== Armadillo ===
 
−
 
 
−
{{Metadata inherit|Armadillo|inherits=Animal|start_at=17}}
 
−
{| class="wikitable" {{added}}
 
−
! Index
 
−
! Type
 
−
!style="width: 250px;" colspan="2"| Meaning
 
−
! Default
 
−
|-
 
−
| {{Metadata id|}}
 
−
| Armadillo State
 
−
|colspan="2"| Armadillo State
 
−
| IDLE
 
−
|}
 
−
 
 
−
== Block Actions ==
 
  
 
No changes so far.
 
No changes so far.
−
 
−
== Inventories ==
 
−
 
−
No changes so far.
 
−
 
−
== Plugin Channels ==
 
−
 
−
No changes so far.
 
−
 
−
== Handshake ==
 
−
 
−
=== 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
 
−
| [[#Definitions:varint|VarInt]]
 
−
| See [[protocol version numbers]] (currently 765 in Minecraft 1.20.4).
 
−
|-
 
−
| Server Address
 
−
| [[#Definitions:string|String]] (255)
 
−
| 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 simple redirect, e.g. if _minecraft._tcp.example.com points to mc.example.org, users connecting to example.com will provide example.org as server address in addition to connecting to it.
 
−
|-
 
−
| Server Port
 
−
| [[#Definitions:unsigned-short|Unsigned Short]]
 
−
| Default is 25565. The Notchian server does not use this information.
 
−
|-
 
−
| Next State
 
−
| [[#Definitions:varint|VarInt]] [[#Definitions:enum|Enum]]
 
−
| 1 for [[#Status|Status]], 2 for [[#Login|Login]]{{change||, 3 for [[#Login|Transfer]]}}.
 
−
|}
 
  
 
== Status ==
 
== Status ==
−
 
−
=== Clientbound ===
 
  
 
No changes so far.
 
No changes so far.
  
−
=== Serverbound ===
+
== Login ==
  
 
No changes so far.
 
No changes so far.
  
−
== Login ==
+
== Configuration ==
  
 
=== Clientbound ===
 
=== Clientbound ===
  
−
==== Cookie Request (Login) ====
+
==== Clientbound Report Details (configuration) ====
  
−
Requests a cookie that was previously stored.
+
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}}
Line 261: Line 56:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | rowspan="1"| 0x05
+
  | rowspan="3"| 0x0F
−
  | rowspan="1"| Login
+
  | rowspan="3"| Configuration
−
  | rowspan="1"| Client
+
  | rowspan="3"| Client
−
  | colspan="2"| Key
+
  | colspan="2"| Details Count
−
  | colspan="2"| Identifier
+
  | colspan="2"| {{Type|VarInt}} (32)
−
  | The identifier of the cookie.
+
  | The number of details in the following array.
−
  |}
+
  |-
−
 
+
| rowspan="2"| Details
−
=== Serverbound ===
+
| Title
 +
| rowspan="2"| {{Type|Array}}
 +
| {{Type|String}} (128)
 +
|
 +
|-
 +
| Description
 +
| {{Type|String}} (4096)
 +
|
 +
|}
  
−
==== Cookie Response (Login) ====
+
==== Clientbound Server Links (configuration) ====
  
−
Response to a [[#Cookie_Request_(Login)|Cookie Request (Login)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
+
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" {{added}}
 
{| class="wikitable" {{added}}
Line 283: Line 86:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | rowspan="3"| 0x04
+
  | rowspan="4"| 0x10
−
  | rowspan="3"| Login
+
  | rowspan="4"| Configuration
−
  | rowspan="3"| Server
+
  | rowspan="4"| Client
−
  | colspan="2"| Key
+
  | colspan="2"| Links Count
−
  | colspan="2"| Identifier
+
  | colspan="2"| {{Type|VarInt}}
−
  | The identifier of the cookie.
+
  | The number of links in the following array.
 +
|-
 +
| rowspan="3"| Links
 +
| Is built-in
 +
| rowspan="3"| {{Type|Array}}
 +
| {{Type|Boolean}}
 +
| Determines if the following label is built-in (from enum) or custom (text component).
 
  |-
 
  |-
−
  | colspan="2"| Has Payload
+
  | Label
−
  | colspan="2"| Boolean
+
  | {{Type|VarInt}} {{Type|Enum}} / {{Type|Text Component}}
−
  | The payload is only present if the cookie exists on the client.
+
  | See below.
 
  |-
 
  |-
−
  | colspan="2"| Payload
+
  | URL
−
  | colspan="2"| Optional ByteArray(5120)
+
  | {{Type|String}}
−
  | The data of the cookie, if any.
+
  | Valid URL.
−
|}
+
|}
−
 
 
−
== Configuration ==
 
−
 
 
−
=== Clientbound ===
 
−
 
 
−
==== Cookie Request (Configuration) ====
 
  
−
Requests a cookie that was previously stored.
 
  
 
{| class="wikitable" {{added}}
 
{| class="wikitable" {{added}}
−
  ! Packet ID
+
  ! ID
−
  ! State
+
  ! Name
−
! Bound To
 
−
! colspan="2"| Field Name
 
−
! colspan="2"| Field Type
 
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | rowspan="1"| 0x00
+
  | 0
−
  | rowspan="1"| Configuration
+
| Bug Report
−
  | rowspan="1"| Client
+
| Displayed on connection error screen; included as a comment in the disconnection report.
−
  | colspan="2"| Key
+
|-
−
  | colspan="2"| Identifier
+
  | 1
−
  | The identifier of the cookie.
+
| Community Guidelines
 +
  |  
 +
|-
 +
  | 2
 +
| Support
 +
|
 +
|-
 +
| 3
 +
| Status
 +
|
 +
|-
 +
| 4
 +
| Feedback
 +
|
 +
|-
 +
| 5
 +
| Community
 +
|
 +
|-
 +
| 6
 +
| Website
 +
|
 +
|-
 +
| 7
 +
| Forums
 +
|
 +
|-
 +
| 8
 +
| News
 +
|  
 +
  |-
 +
| 9
 +
| Announcements
 +
|  
 +
  |-
 
  |}
 
  |}
  
 
=== Serverbound ===
 
=== Serverbound ===
  
−
==== Cookie Response (Configuration) ====
+
No changes so far.
−
 
 
−
Response to a [[#Cookie_Request_(Configuration)|Cookie Request (Configuration)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
 
−
 
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! colspan="2"| Field Name
 
−
! colspan="2"| Field Type
 
−
! Notes
 
−
|-
 
−
| rowspan="3"| 0x01
 
−
| rowspan="3"| Configuration
 
−
| rowspan="3"| Server
 
−
| colspan="2"| Key
 
−
| colspan="2"| Identifier
 
−
| The identifier of the cookie.
 
−
|-
 
−
| colspan="2"| Has Payload
 
−
| colspan="2"| Boolean
 
−
| The payload is only present if the cookie exists on the client.
 
−
|-
 
−
| colspan="2"| Payload
 
−
| colspan="2"| Optional ByteArray(5120)
 
−
| The data of the cookie, if any.
 
−
|}
 
  
 
== Play ==
 
== Play ==
Line 357: Line 164:
 
=== Clientbound ===
 
=== Clientbound ===
  
−
==== Cookie Request (Play) ====
+
==== Clientbound Report Details (play) ====
  
−
Requests a cookie that was previously stored.
+
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}}
Line 369: Line 176:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | rowspan="1"| 0x16
+
  | rowspan="3"| 0x7A
−
  | rowspan="1"| Play
+
  | rowspan="3"| Configuration
−
  | rowspan="1"| Client
+
  | rowspan="3"| Client
−
  | colspan="2"| Key
+
  | colspan="2"| Details Count
−
  | colspan="2"| Identifier
+
  | colspan="2"| {{Type|VarInt}} (32)
−
| The identifier of the cookie.
+
  | The number of details in the following array.
−
  |}
 
−
 
 
−
==== Store Cookie ====
 
−
 
 
−
Stores some arbitrary data on the client, which persists between server transfers. The Notchian client only accepts cookies of up to 5 kiB in size.
 
−
 
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! colspan="2"| Field Name
 
−
! colspan="2"| Field Type
 
−
! Notes
 
 
  |-
 
  |-
−
  | rowspan="2"| 0x6A
+
  | rowspan="2"| Details
−
  | rowspan="2"| Play
+
  | Title
−
  | rowspan="2"| Client
+
  | rowspan="2"| {{Type|Array}}
−
| colspan="2"| Key
+
  | {{Type|String}} (128)
−
  | colspan="2"| Identifier
+
  |
−
  | The identifier of the cookie.
 
 
  |-
 
  |-
−
  | colspan="2"| Payload
+
  | Description
−
  | colspan="2"| ByteArray(5120)
+
  | {{Type|String}} (4096)
−
  | The data of the cookie.
+
  |
−
|}
+
|}
  
−
==== Transfer ====
+
==== Clientbound Server Links (play) ====
  
−
Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
+
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" {{added}}
 
{| class="wikitable" {{added}}
Line 413: Line 206:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | rowspan="2"| 0x72
+
  | rowspan="4"| 0x7B
−
  | rowspan="2"| Play
+
  | rowspan="4"| Configuration
−
  | rowspan="2"| Client
+
  | rowspan="4"| Client
−
  | colspan="2"| Host
+
  | colspan="2"| Links Count
−
| colspan="2"| String
+
  | colspan="2"| {{Type|VarInt}}
−
| The hostname of IP of the server.
+
  | The number of links in the following array.
−
|-
 
−
| colspan="2"| Port
 
−
  | colspan="2"| VarInt
 
−
| The port of the server.
 
−
|}
 
−
 
 
−
==== Update Attributes ====
 
−
 
 
−
Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
 
−
 
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
  ! Bound To
 
−
! colspan="2"| Field Name
 
−
! colspan="2"| Field Type
 
−
! Notes
 
−
|-
 
−
| rowspan="6"| 0x71
 
−
| rowspan="6"| Play
 
−
| rowspan="6"| Client
 
−
| colspan="2"| Entity ID
 
−
| colspan="2"| VarInt
 
−
|
 
−
|-
 
−
| colspan="2"| Number Of Properties
 
−
| colspan="2"| VarInt
 
−
| Number of elements in the following array.
 
 
  |-
 
  |-
−
  | rowspan="4"| Property
+
  | rowspan="3"| Links
−
  | {{change|Key|Id}}
+
  | Is built-in
−
  | rowspan="4"| Array
+
  | rowspan="3"| {{Type|Array}}
−
  | {{change|Identifier|VarInt Enum}}
+
  | {{Type|Boolean}}
−
  | See below.
+
  | Determines if the following label is built-in (from enum) or custom (text component).
 
  |-
 
  |-
−
  | Value
+
  | Label
−
  | Double
+
  | {{Type|VarInt}} {{Type|Enum}} / {{Type|Text Component}}
 
  | See below.
 
  | See below.
 
  |-
 
  |-
−
  | Number Of Modifiers
+
  | URL
−
  | VarInt
+
  | {{Type|String}}
−
| Number of elements in the following array.
+
| Valid URL.
−
|-
+
|}
−
| Modifiers
 
−
| Array of Modifier Data
 
−
| See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
 
−
|}
 
  
−
Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
+
{| class="wikitable" {{added}}
−
 
+
  ! ID
−
{| class="wikitable"
+
  ! Name
−
|-
+
  ! Notes
−
! Id
 
−
! Key
 
−
! Default
 
−
  ! Min
 
−
  ! Max
 
−
  ! Label
 
 
  |-
 
  |-
 
  | 0
 
  | 0
−
  | generic.armor
+
  | Bug Report
−
  | 0.0
+
  | Displayed on connection error screen; included as a comment in the disconnection report.
−
| 0.0
 
−
| 30.0
 
−
| Armor.
 
 
  |-
 
  |-
 
  | 1
 
  | 1
−
  | generic.armor_toughness
+
  | Community Guidelines
−
  | 0.0
+
  |  
−
| 0.0
 
−
| 20.0
 
−
| Armor Toughness.
 
 
  |-
 
  |-
 
  | 2
 
  | 2
−
  | generic.attack_damage
+
  | Support
−
  | 2.0
+
  |  
−
| 0.0
 
−
| 2048.0
 
−
| Attack Damage.
 
 
  |-
 
  |-
 
  | 3
 
  | 3
−
  | generic.attack_knockback
+
  | Status
−
  | 0.0
+
  |  
−
| 0.0
 
−
| 5.0
 
−
| Attack Knockback.
 
 
  |-
 
  |-
 
  | 4
 
  | 4
−
  | generic.attack_speed
+
  | Feedback
−
  | 4.0
+
  |  
−
| 0.0
+
  |-
−
| 1024.0
 
−
| Attack Speed.
 
−
  |- {{added}}
 
 
  | 5
 
  | 5
−
  | generic.block_interaction_range
+
  | Community
−
  | 4.5
+
  |  
−
| 0.0
+
  |-
−
| 64.0
 
−
| Block Interaction Range.
 
−
  |- {{added}}
 
 
  | 6
 
  | 6
−
  | generic.entity_interaction_range
+
  | Website
−
  | 3.0
+
  |  
−
| 0.0
 
−
| 64.0
 
−
| Entity Interaction Range.
 
 
  |-
 
  |-
 
  | 7
 
  | 7
−
  | generic.flying_speed
+
  | Forums
−
  | 0.4
+
  |  
−
| 0.0
 
−
| 1024.0
 
−
| Flying Speed.
 
 
  |-
 
  |-
 
  | 8
 
  | 8
−
  | generic.follow_range
+
  | News
−
  | 32.0
+
  |  
−
| 0.0
 
−
| 2048.0
 
−
| Follow Range.
 
 
  |-
 
  |-
 
  | 9
 
  | 9
−
  | horse.jump_strength
+
  | Announcements
−
  | 0.7
+
  |  
−
| 0.0
 
−
| 2.0
 
−
| Jump Strength.
 
 
  |-
 
  |-
−
| 10
 
−
| generic.knockback_resistance
 
−
| 0.0
 
−
| 0.0
 
−
| 1.0
 
−
| Knockback Resistance.
 
−
|-
 
−
| 11
 
−
| generic.luck
 
−
| 0.0
 
−
| -1024.0
 
−
| 1024.0
 
−
| Luck.
 
−
|-
 
−
| 12
 
−
| generic.max_absorption
 
−
| 0.0
 
−
| 0.0
 
−
| 2048.0
 
−
| Max Absorption.
 
−
|-
 
−
| 13
 
−
| generic.max_health
 
−
| 20.0
 
−
| 1.0
 
−
| 1024.0
 
−
| Max Health.
 
−
|-
 
−
| 14
 
−
| generic.movement_speed
 
−
| 0.7
 
−
| 0.0
 
−
| 1024.0
 
−
| Movement Speed.
 
−
|- {{added}}
 
−
| 15
 
−
| generic.scale
 
−
| 1.0
 
−
| 0.0625
 
−
| 16.0
 
−
| Scale.
 
−
|-
 
−
| 16
 
−
| zombie.spawn_reinforcements
 
−
| 0.0
 
−
| 0.0
 
−
| 1.0
 
−
| Spawn Reinforcements Chance.
 
−
|- {{added}}
 
−
| 17
 
−
| generic.step_height
 
−
| 0.6
 
−
| 0.0
 
−
| 10.0
 
−
| Step Height.
 
−
|}
 
−
 
−
''Modifier Data'' structure:
 
−
 
−
{| class="wikitable"
 
−
|-
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
| UUID
 
−
| UUID
 
−
|
 
−
|-
 
−
| Amount
 
−
| Double
 
−
| May be positive or negative.
 
−
|-
 
−
| Operation
 
−
| Byte
 
−
| See below.
 
−
|}
 
−
 
−
The operation controls how the base value of the modifier is changed.
 
−
 
−
* 0: Add/subtract amount
 
−
* 1: Add/subtract amount percent of the current value
 
−
* 2: Multiply by amount percent
 
−
 
−
All of the 0's are applied first, and then the 1's, and then the 2's.
 
−
 
−
==== Entity Effect ====
 
−
 
−
{| class="wikitable"
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! Field Name
 
−
! Field Type
 
−
! Notes
 
−
|-
 
−
| rowspan="7"| 0x72
 
−
| rowspan="7"| Play
 
−
| rowspan="7"| Client
 
−
| Entity ID
 
−
| VarInt
 
−
|
 
−
|-
 
−
| Effect ID
 
−
| VarInt
 
−
| See {{Minecraft Wiki|Status effect#Effect list|this table}}.
 
−
|-
 
−
| Amplifier
 
−
| Byte
 
−
| Notchian client displays effect level as Amplifier + 1.
 
−
|-
 
−
| Duration
 
−
| VarInt
 
−
| Duration in ticks. (-1 for infinite)
 
−
|-
 
−
| Flags
 
−
| Byte
 
−
| Bit field, see below.
 
−
|- {{removed}}
 
−
| Has Factor Data
 
−
| Boolean
 
−
| Used in DARKNESS effect
 
−
|- {{removed}}
 
−
| Factor Codec
 
−
| NBT Tag
 
−
| See below
 
−
|}
 
−
 
−
{{Need Info|What exact effect does the blend bit flag have on the client? What happens if it is used on effects besides DARKNESS?}}
 
−
 
−
Within flags:
 
−
 
−
* 0x01: Is ambient - was the effect spawned from a beacon?  All beacon-generated effects are ambient.  Ambient effects use a different icon in the HUD (blue border rather than gray).  If all effects on an entity are ambient, the [[Entity_metadata#Living Entity|"Is potion effect ambient" living metadata field]] should be set to true.  Usually should not be enabled.
 
−
* 0x02: Show particles - should all particles from this effect be hidden?  Effects with particles hidden are not included in the calculation of the effect color, and are not rendered on the HUD (but are still rendered within the inventory).  Usually should be enabled.
 
−
* 0x04: Show icon - should the icon be displayed on the client?  Usually should be enabled.
 
−
* {{change||0x08: Blend - should the effect's hard-coded blending be applied?  Currently only used in the DARKNESS effect to apply extra void fog and adjust the gamma value for lighting.}}
 
−
 
−
{{change|Factor Data|}}
 
−
{| class="wikitable" {{removed}}
 
−
!Name
 
−
!Type
 
−
!style="width: 250px;" colspan="2"| Notes
 
−
|-
 
−
| padding_duration
 
−
| TAG_INT
 
−
|
 
−
|-
 
−
| factor_start
 
−
| TAG_FLOAT
 
−
|
 
−
|-
 
−
| factor_target
 
−
| TAG_FLOAT
 
−
|
 
−
|-
 
−
| factor_current
 
−
| TAG_FLOAT
 
−
|
 
−
|-
 
−
| effect_changed_timestamp
 
−
| TAG_INT
 
−
|-
 
−
| factor_previous_frame
 
−
| TAG_FLOAT
 
−
|-
 
−
| had_effect_last_tick
 
−
| TAG_BOOLEAN
 
 
  |}
 
  |}
  
 
=== Serverbound ===
 
=== Serverbound ===
  
−
==== Cookie Response (Play) ====
+
No changes so far.
−
 
 
−
Response to a [[#Cookie_Request_(Play)|Cookie Request (Play)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
 
−
 
 
−
{| class="wikitable" {{added}}
 
−
! Packet ID
 
−
! State
 
−
! Bound To
 
−
! colspan="2"| Field Name
 
−
! colspan="2"| Field Type
 
−
! Notes
 
−
|-
 
−
| rowspan="3"| 0x6A
 
−
| rowspan="3"| Play
 
−
| rowspan="3"| Server
 
−
| colspan="2"| Key
 
−
| colspan="2"| Identifier
 
−
| The identifier of the cookie.
 
−
|-
 
−
| colspan="2"| Has Payload
 
−
| colspan="2"| Boolean
 
−
| The payload is only present if the cookie exists on the client.
 
−
|-
 
−
| colspan="2"| Payload
 
−
| colspan="2"| Optional ByteArray(5120)
 
−
| The data of the cookie, if any.
 
−
|}
 
  
 
[[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"