Difference between revisions of "Pre-release protocol"

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(→‎Maps: clarified packet description)
(→‎Entity Metadata: Merge changes from stable docs to incorporate new metadata type templates. Fix my earlier mistake on Pose in the process.)
 
Line 1: Line 1:
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|15w36c, protocol 69]]). 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|1.20.4, protocol 765]]) to the current pre-release (currently [[Protocol version numbers|24w03b, protocol {{Snapshot PVN|1073741996}}]]). 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.
__NOTOC__
+
 
 
== Contents ==
 
== Contents ==
 +
 +
<div style="float:right;">__TOC__</div>
  
 
=== Data types ===
 
=== Data types ===
  
* [[#Chunk Section|Chunk Section]]
+
No changes so far.
* [[#Entity Metadata|Entity Metadata]]
 
  
 
=== Packets ===
 
=== Packets ===
Line 15: Line 16:
 
  ! ID
 
  ! ID
 
  ! Packet name
 
  ! Packet name
  ! colspan=2 | Documentation
+
  !colspan="2"| Documentation
 
  |-
 
  |-
  ! colspan=4 | Handshaking serverbound
+
  !colspan="4"| Handshake serverbound
{{PacketList|0x00|Handshake}}
+
{{PacketList|0x00|Handshake}}
 
  |-
 
  |-
  ! colspan=4 | Play clientbound
+
  !colspan="4"| Login clientbound
{{PacketList|0x00|Keep Alive|pre=unchanged}}
+
{{PacketList|0x05|Cookie Request (login)|rel=added}}
{{PacketList|0x01|Join Game|pre=unchanged}}
 
{{PacketList|0x02|Chat Message|pre=unchanged}}
 
{{PacketList|0x03|Time Update|pre=unchanged}}
 
{{PacketList|0x04|Entity Equipment}}
 
{{PacketList|0x05|Spawn Position|pre=unchanged}}
 
{{PacketList|0x06|Update Health|pre=unchanged}}
 
{{PacketList|0x07|Respawn|pre=unchanged}}
 
{{PacketList|0x08|Player Position And Look|pre=unchanged}}
 
{{PacketList|0x09|Held Item Change|pre=unchanged}}
 
{{PacketList|0x0A|Use Bed|pre=unchanged}}
 
{{PacketList|0x0B|Animation|pre=unchanged}}
 
{{PacketList|0x0C|Spawn Player}}
 
{{PacketList|0x0D|Collect Item|pre=unchanged}}
 
{{PacketList|0x0E|Spawn Object}}
 
{{PacketList|0x0F|Spawn Mob}}
 
{{PacketList|0x10|Spawn Painting|pre=unchanged}}
 
{{PacketList|0x11|Spawn Experience Orb|pre=unchanged}}
 
{{PacketList|0x12|Entity Velocity|pre=unchanged}}
 
{{PacketList|0x13|Destroy Entities|pre=unchanged}}
 
{{PacketList|0x14|Entity|pre=unchanged}}
 
{{PacketList|0x15|Entity Relative Move|pre=unchanged}}
 
{{PacketList|0x16|Entity Look|pre=unchanged}}
 
{{PacketList|0x17|Entity Look And Relative Move|pre=unchanged}}
 
{{PacketList|0x18|Entity Teleport|pre=unchanged}}
 
{{PacketList|0x19|Entity Head Look|pre=unchanged}}
 
{{PacketList|0x1A|Entity Status}}
 
{{PacketList|0x1B|Attach Entity|pre=unchanged}}
 
{{PacketList|0x1C|Entity Metadata|pre=unchanged}}
 
{{PacketList|0x1D|Entity Effect|pre=unchanged}}
 
{{PacketList|0x1E|Remove Entity Effect|pre=unchanged}}
 
{{PacketList|0x1F|Set Experience|pre=unchanged}}
 
{{PacketList|0x20|Entity Properties}}
 
{{PacketList|0x21|Chunk Data}}
 
{{PacketList|0x22|Unload Chunk|rel=added}}
 
{{PacketList|{{Change|0x22|0x23}}|Multi Block Change|pre=unchanged}}
 
{{PacketList|{{Change|0x23|0x24}}|Block Change|pre=unchanged}}
 
{{PacketList|{{Change|0x24|0x25}}|Block Action|pre=unchanged}}
 
{{PacketList|{{Change|0x25|0x26}}|Block Break Animation|pre=unchanged}}
 
{{PacketList|0x26|Map Chunk Bulk|pre=removed}}
 
{{PacketList|0x27|Explosion|pre=unchanged}}
 
{{PacketList|0x28|Effect|pre=unchanged}}
 
{{PacketList|0x29|Sound Effect|pre=unchanged}}
 
{{PacketList|0x2A|Particle|pre=unchanged}}
 
{{PacketList|0x2B|Change Game State|pre=unchanged}}
 
{{PacketList|0x2C|Spawn Global Entity|pre=unchanged}}
 
{{PacketList|0x2D|Open Window|pre=unchanged}}
 
{{PacketList|0x2E|Close Window|pre=unchanged}}
 
{{PacketList|0x2F|Set Slot|pre=unchanged}}
 
{{PacketList|0x30|Window Items|pre=unchanged}}
 
{{PacketList|0x31|Window Property|pre=unchanged}}
 
{{PacketList|0x32|Confirm Transaction|pre=unchanged}}
 
{{PacketList|0x33|Update Sign|pre=unchanged}}
 
{{PacketList|0x34|Maps}}
 
{{PacketList|0x35|Update Block Entity|pre=unchanged}}
 
{{PacketList|0x36|Sign Editor Open|pre=unchanged}}
 
{{PacketList|0x37|Statistics|pre=unchanged}}
 
{{PacketList|0x38|Player List Item|pre=unchanged}}
 
{{PacketList|0x39|Player Abilities|pre=unchanged}}
 
{{PacketList|0x3A|Tab-Complete|pre=unchanged}}
 
{{PacketList|0x3B|Scoreboard Objective|pre=unchanged}}
 
{{PacketList|0x3C|Update Score|pre=unchanged}}
 
{{PacketList|0x3D|Display Scoreboard|pre=unchanged}}
 
{{PacketList|0x3E|Teams|pre=unchanged}}
 
{{PacketList|0x3F|Plugin Message|pre=unchanged}}
 
{{PacketList|0x40|Disconnect|pre=unchanged}}
 
{{PacketList|0x41|Server Difficulty|pre=unchanged}}
 
{{PacketList|0x42|Combat Event}}
 
{{PacketList|0x43|Camera|pre=unchanged}}
 
{{PacketList|0x44|World Border|pre=unchanged}}
 
{{PacketList|0x45|Title|pre=unchanged}}
 
{{PacketList|0x46|Set Compression|pre=unchanged}}
 
{{PacketList|0x47|Player List Header/Footer|pre=unchanged}}
 
{{PacketList|0x48|Resource Pack Send|pre=unchanged}}
 
{{PacketList|0x49|Update Entity NBT|pre=removed}}
 
{{PacketList|0x49|Boss Bar|rel=added}}
 
{{PacketList|0x4A|Set Cooldown|rel=added}}
 
 
  |-
 
  |-
  ! colspan=4 | Play serverbound
+
  !colspan="4"| Login serverbound
{{PacketList|0x00|Keep Alive|rel=Keep Alive 2|pre=unchanged}}
+
{{PacketList|0x04|Cookie Response (login)|rel=added}}
{{PacketList|0x01|Chat Message|rel=Chat Message 2|pre=unchanged}}
 
{{PacketList|0x02|Use Entity}}
 
{{PacketList|0x03|Player|pre=unchanged}}
 
{{PacketList|0x04|Player Position|pre=unchanged}}
 
{{PacketList|0x05|Player Look|pre=unchanged}}
 
{{PacketList|0x06|Player Position And Look|rel=Player Position And Look 2|pre=unchanged}}
 
{{PacketList|0x07|Player Digging}}
 
{{PacketList|0x08|Use Item|rel=added}}
 
{{PacketList|{{Change|0x08|0x09}}|Player Block Placement}}
 
{{PacketList|{{Change|0x09|0x0A}}|Held Item Change|rel=Held Item Change 2|pre=unchanged}}
 
{{PacketList|{{Change|0x0A|0x0B}}|Animation|rel=Animation 2}}
 
{{PacketList|{{Change|0x0B|0x0C}}|Entity Action}}
 
{{PacketList|{{Change|0x0C|0x0D}}|Steer Vehicle|pre=unchanged}}
 
{{PacketList|{{Change|0x0D|0x0E}}|Close Window|rel=Close Window 2|pre=unchanged}}
 
{{PacketList|{{Change|0x0E|0x0F}}|Click Window|pre=unchanged}}
 
{{PacketList|{{Change|0x0F|0x10}}|Confirm Transaction|rel=Confirm Transaction 2|pre=unchanged}}
 
{{PacketList|{{Change|0x10|0x11}}|Creative Inventory Action|pre=unchanged}}
 
{{PacketList|{{Change|0x11|0x12}}|Enchant Item|pre=unchanged}}
 
{{PacketList|{{Change|0x12|0x13}}|Update Sign|rel=Update Sign 2}}
 
{{PacketList|{{Change|0x13|0x14}}|Player Abilities|rel=Player Abilities 2|pre=unchanged}}
 
{{PacketList|{{Change|0x14|0x15}}|Tab-Complete|rel=Tab-Complete 2|pre=unchanged}}
 
{{PacketList|{{Change|0x15|0x16}}|Client Settings}}
 
{{PacketList|{{Change|0x16|0x17}}|Client Status}}
 
{{PacketList|{{Change|0x17|0x18}}|Plugin Message|rel=Plugin Message 2|pre=unchanged}}
 
{{PacketList|{{Change|0x18|0x19}}|Spectate|pre=unchanged}}
 
{{PacketList|{{Change|0x19|0x1A}}|Resource Pack Status|pre=unchanged}}
 
 
  |-
 
  |-
  ! colspan=4 | Status clientbound
+
  !colspan="4"| Configuration clientbound
{{PacketList|0x00|Response|pre=unchanged}}
+
{{PacketList|0x00|Cookie Request (configuration)|rel=added}}
{{PacketList|0x01|Pong|pre=unchanged}}
+
{{PacketList|{{change|0x00|0x01}}|Clientbound Plugin Message (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x01|0x02}}|Disconnect (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x03|0x04}}|Clientbound Keep Alive (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x04|0x05}}|Ping (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x05|0x06}}|Registry Data|pre=unchanged}}
 +
{{PacketList|{{change|0x06|0x07}}|Remove Resource Pack (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x07|0x08}}|Add Resource Pack (configuration)|pre=unchanged}}
 +
{{PacketList|0x09|Store Cookie (configuration)|rel=added}}
 +
{{PacketList|0x0A|Transfer (configuration)|rel=added}}
 +
{{PacketList|{{change|0x08|0x0B}}|Feature Flags|pre=unchanged}}
 +
{{PacketList|{{change|0x09|0x0C}}|Update Tags (configuration)|pre=unchanged}}
 +
 
 
  |-
 
  |-
  ! colspan=4 | Status serverbound
+
  !colspan="4"| Configuration serverbound
{{PacketList|0x00|Request|pre=unchanged}}
+
{{PacketList|0x01|Cookie Response (configuration)|rel=added}}
{{PacketList|0x01|Ping|pre=unchanged}}
+
{{PacketList|{{change|0x01|0x02}}|Serverbound Plugin Message (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x03|0x04}}|Serverbound Keep Alive (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x04|0x05}}|Pong (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x05|0x06}}|Resource Pack Response (configuration)|pre=unchanged}}
 
  |-
 
  |-
  ! colspan=4 | Login clientbound
+
  !colspan="4"| Play clientbound
{{PacketList|0x00|Disconnect|rel=Disconnect 2|pre=unchanged}}
+
{{PacketList|0x16|Cookie Request (Play)|rel=added}}
{{PacketList|0x01|Encryption Request|pre=unchanged}}
+
{{PacketList|{{change|0x16|0x17}}|Set Cooldown|pre=unchanged}}
{{PacketList|0x02|Login Success|pre=unchanged}}
+
{{PacketList|{{change|0x17|0x18}}|Chat Suggestions|pre=unchanged}}
{{PacketList|0x03|Set Compression|rel=Set Compression 2|pre=unchanged}}
+
{{PacketList|{{change|0x18|0x19}}|Clientbound Plugin Message (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x19|0x1A}}|Damage Event|pre=unchanged}}
 +
{{PacketList|{{change|0x1A|0x1B}}|Delete Message|pre=unchanged}}
 +
{{PacketList|{{change|0x1B|0x1C}}|Disconnect (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x1C|0x1D}}|Disguised Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x1D|0x1E}}|Entity Event|pre=unchanged}}
 +
{{PacketList|{{change|0x1E|0x1F}}|Explosion|pre=unchanged}}
 +
{{PacketList|{{change|0x1F|0x20}}|Unload Chunk|pre=unchanged}}
 +
{{PacketList|{{change|0x20|0x21}}|Game Event|pre=unchanged}}
 +
{{PacketList|{{change|0x21|0x22}}|Open Horse Screen|pre=unchanged}}
 +
{{PacketList|{{change|0x22|0x23}}|Hurt Animation|pre=unchanged}}
 +
{{PacketList|{{change|0x23|0x24}}|Initialize World Border|pre=unchanged}}
 +
{{PacketList|{{change|0x24|0x25}}|Clientbound Keep Alive (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x25|0x26}}|Chunk Data and Update Light|pre=unchanged}}
 +
{{PacketList|{{change|0x26|0x27}}|World Event|pre=unchanged}}
 +
{{PacketList|{{change|0x27|0x28}}|Particle|pre=unchanged}}
 +
{{PacketList|{{change|0x28|0x29}}|Update Light|pre=unchanged}}
 +
{{PacketList|{{change|0x29|0x2A}}|Login (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x2A|0x2B}}|Map Data|pre=unchanged}}
 +
{{PacketList|{{change|0x2B|0x2C}}|Merchant Offers|pre=unchanged}}
 +
{{PacketList|{{change|0x2C|0x2D}}|Update Entity Position|pre=unchanged}}
 +
{{PacketList|{{change|0x2D|0x2E}}|Update Entity Position and Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x2E|0x2F}}|Update Entity Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x2F|0x30}}|Move Vehicle|pre=unchanged}}
 +
{{PacketList|{{change|0x30|0x31}}|Open Book|pre=unchanged}}
 +
{{PacketList|{{change|0x31|0x32}}|Open Screen|pre=unchanged}}
 +
{{PacketList|{{change|0x32|0x33}}|Open Sign Editor|pre=unchanged}}
 +
{{PacketList|{{change|0x33|0x34}}|Ping (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x34|0x35}}|Ping Response (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x35|0x36}}|Place Ghost Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x36|0x37}}|Player Abilities|pre=unchanged}}
 +
{{PacketList|{{change|0x37|0x38}}|Player Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x38|0x39}}|End Combat|pre=unchanged}}
 +
{{PacketList|{{change|0x39|0x3A}}|Enter Combat|pre=unchanged}}
 +
{{PacketList|{{change|0x3A|0x3B}}|Combat Death|pre=unchanged}}
 +
{{PacketList|{{change|0x3B|0x3C}}|Player Info Remove|pre=unchanged}}
 +
{{PacketList|{{change|0x3C|0x3D}}|Player Info Update|pre=unchanged}}
 +
{{PacketList|{{change|0x3D|0x3E}}|Look At|pre=unchanged}}
 +
{{PacketList|{{change|0x3E|0x3F}}|Synchronize Player Position|pre=unchanged}}
 +
{{PacketList|{{change|0x3F|0x40}}|Update Recipe Book|pre=unchanged}}
 +
{{PacketList|{{change|0x40|0x41}}|Remove Entities|pre=unchanged}}
 +
{{PacketList|{{change|0x41|0x42}}|Remove Entity Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x42|0x43}}|Reset Score|pre=unchanged}}
 +
{{PacketList|{{change|0x43|0x44}}|Remove Resource Pack (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x44|0x45}}|Add Resource Pack (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x45|0x46}}|Respawn|pre=unchanged}}
 +
{{PacketList|{{change|0x46|0x47}}|Set Head Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x47|0x48}}|Update Section Blocks|pre=unchanged}}
 +
{{PacketList|{{change|0x48|0x49}}|Select Advancements Tab|pre=unchanged}}
 +
{{PacketList|{{change|0x49|0x4A}}|Server Data|pre=unchanged}}
 +
{{PacketList|{{change|0x4A|0x4B}}|Set Action Bar Text|pre=unchanged}}
 +
{{PacketList|{{change|0x4B|0x4C}}|Set Border Center|pre=unchanged}}
 +
{{PacketList|{{change|0x4C|0x4D}}|Set Border Lerp Size|pre=unchanged}}
 +
{{PacketList|{{change|0x4D|0x4E}}|Set Border Size|pre=unchanged}}
 +
{{PacketList|{{change|0x4E|0x4F}}|Set Border Warning Delay|pre=unchanged}}
 +
{{PacketList|{{change|0x4F|0x50}}|Set Border Warning Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x50|0x51}}|Set Camera|pre=unchanged}}
 +
{{PacketList|{{change|0x51|0x52}}|Set Held Item|pre=unchanged}}
 +
{{PacketList|{{change|0x52|0x53}}|Set Center Chunk|pre=unchanged}}
 +
{{PacketList|{{change|0x53|0x54}}|Set Render Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x54|0x55}}|Set Default Spawn Position|pre=unchanged}}
 +
{{PacketList|{{change|0x55|0x56}}|Display Objective|pre=unchanged}}
 +
{{PacketList|{{change|0x56|0x57}}|Set Entity Metadata|pre=unchanged}}
 +
{{PacketList|{{change|0x57|0x58}}|Link Entities|pre=unchanged}}
 +
{{PacketList|{{change|0x58|0x59}}|Set Entity Velocity|pre=unchanged}}
 +
{{PacketList|{{change|0x59|0x5A}}|Set Equipment|pre=unchanged}}
 +
{{PacketList|{{change|0x5A|0x5B}}|Set Experience|pre=unchanged}}
 +
{{PacketList|{{change|0x5B|0x5C}}|Set Health|pre=unchanged}}
 +
{{PacketList|{{change|0x5C|0x5D}}|Update Objectives|pre=unchanged}}
 +
{{PacketList|{{change|0x5D|0x5E}}|Set Passengers|pre=unchanged}}
 +
{{PacketList|{{change|0x5E|0x5F}}|Update Teams|pre=unchanged}}
 +
{{PacketList|{{change|0x5F|0x60}}|Update Score|pre=unchanged}}
 +
{{PacketList|{{change|0x60|0x61}}|Set Simulation Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x61|0x62}}|Set Subtitle Text|pre=unchanged}}
 +
{{PacketList|{{change|0x62|0x63}}|Update Time|pre=unchanged}}
 +
{{PacketList|{{change|0x63|0x64}}|Set Title Text|pre=unchanged}}
 +
{{PacketList|{{change|0x64|0x65}}|Set Title Animation Times|pre=unchanged}}
 +
{{PacketList|{{change|0x65|0x66}}|Entity Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x66|0x67}}|Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x67|0x68}}|Start Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x68|0x69}}|Stop Sound|pre=unchanged}}
 +
{{PacketList|0x6A|Store Cookie (Play)|rel=added}}
 +
{{PacketList|{{change|0x69|0x6B}}|System Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x6A|0x6C}}|Set Tab List Header And Footer|pre=unchanged}}
 +
{{PacketList|{{change|0x6B|0x6D}}|Tag Query Response|pre=unchanged}}
 +
{{PacketList|{{change|0x6C|0x6E}}|Pickup Item|pre=unchanged}}
 +
{{PacketList|{{change|0x6D|0x6F}}|Teleport Entity|pre=unchanged}}
 +
{{PacketList|{{change|0x6E|0x70}}|Set Ticking State|pre=unchanged}}
 +
{{PacketList|{{change|0x6F|0x71}}|Step Tick|pre=unchanged}}
 +
{{PacketList|0x72|Transfer (Play)|rel=added}}
 +
{{PacketList|{{change|0x70|0x73}}|Update Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x71|0x74}}|Update Attributes}}
 +
{{PacketList|{{change|0x72|0x75}}|Entity Effect}}
 +
{{PacketList|{{change|0x73|0x76}}|Update Recipes|pre=unchanged}}
 +
{{PacketList|{{change|0x74|0x77}}|Update Tags (play)|pre=unchanged}}
 
  |-
 
  |-
  ! colspan=4 | Login serverbound
+
  !colspan="4"| Play serverbound
{{PacketList|0x00|Login Start|pre=unchanged}}
+
{{PacketList|0x10|Cookie Response (play)|rel=added}}
{{PacketList|0x01|Encryption Response|pre=unchanged}}
+
{{PacketList|{{change|0x10|0x11}}|Serverbound Plugin Message (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x11|0x12}}|Edit Book|pre=unchanged}}
 +
{{PacketList|{{change|0x12|0x13}}|Query Entity Tag|pre=unchanged}}
 +
{{PacketList|{{change|0x13|0x14}}|Interact|pre=unchanged}}
 +
{{PacketList|{{change|0x14|0x15}}|Jigsaw Generate|pre=unchanged}}
 +
{{PacketList|{{change|0x15|0x16}}|Serverbound Keep Alive (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x16|0x17}}|Lock Difficulty|pre=unchanged}}
 +
{{PacketList|{{change|0x17|0x18}}|Set Player Position|pre=unchanged}}
 +
{{PacketList|{{change|0x18|0x19}}|Set Player Position and Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x19|0x1A}}|Set Player Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x1A|0x1B}}|Set Player On Ground|pre=unchanged}}
 +
{{PacketList|{{change|0x1B|0x1C}}|Move Vehicle|pre=unchanged}}
 +
{{PacketList|{{change|0x1C|0x1D}}|Paddle Boat|pre=unchanged}}
 +
{{PacketList|{{change|0x1D|0x1E}}|Pick Item|pre=unchanged}}
 +
{{PacketList|{{change|0x1E|0x1F}}|Ping Request (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x1F|0x20}}|Place Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x20|0x21}}|Player Abilities|pre=unchanged}}
 +
{{PacketList|{{change|0x21|0x22}}|Player Action|pre=unchanged}}
 +
{{PacketList|{{change|0x22|0x23}}|Player Command|pre=unchanged}}
 +
{{PacketList|{{change|0x23|0x24}}|Player Input|pre=unchanged}}
 +
{{PacketList|{{change|0x24|0x25}}|Pong (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x25|0x26}}|Change Recipe Book Settings|pre=unchanged}}
 +
{{PacketList|{{change|0x26|0x27}}|Set Seen Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x27|0x28}}|Rename Item|pre=unchanged}}
 +
{{PacketList|{{change|0x28|0x29}}|Resource Pack Response (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x29|0x2A}}|Seen Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x2A|0x2B}}|Select Trade|pre=unchanged}}
 +
{{PacketList|{{change|0x2B|0x2C}}|Set Beacon Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x2C|0x2D}}|Set Held Item|pre=unchanged}}
 +
{{PacketList|{{change|0x2D|0x2E}}|Program Command Block|pre=unchanged}}
 +
{{PacketList|{{change|0x2E|0x2F}}|Program Command Block Minecart|pre=unchanged}}
 +
{{PacketList|{{change|0x2F|0x30}}|Set Creative Mode Slot|pre=unchanged}}
 +
{{PacketList|{{change|0x30|0x31}}|Program Jigsaw Block|pre=unchanged}}
 +
{{PacketList|{{change|0x31|0x32}}|Program Structure Block|pre=unchanged}}
 +
{{PacketList|{{change|0x32|0x33}}|Update Sign|pre=unchanged}}
 +
{{PacketList|{{change|0x33|0x34}}|Swing Arm|pre=unchanged}}
 +
{{PacketList|{{change|0x34|0x35}}|Teleport To Entity|pre=unchanged}}
 +
{{PacketList|{{change|0x35|0x36}}|Use Item On|pre=unchanged}}
 +
{{PacketList|{{change|0x36|0x37}}|Use Item|pre=unchanged}}
 
  |}
 
  |}
  
 
== New/modified data types ==
 
== New/modified data types ==
  
=== Chunk Section ===
+
No changes so far.
  
Format is now:
+
== Entity Metadata ==
  
{| class="wikitable"
+
{{#vardefine: meta_prerelease | 1}}
|-
+
 
! Field Name
+
{{Metadata type definition/begin}}
  ! Field Type
+
  ! Value
 
  ! Notes
 
  ! Notes
  |-
+
{{Metadata type definition|Byte}}
  | Bits Per Block
+
| {{Type|Byte}}
  | Unsigned Byte
+
|
  | How many bits per block in Data Array. If greater than 8 (will be changed to “if 0” in the next snapshot), the Palette Length and Palette fields are omitted and the global palette is used.
+
{{Metadata type definition|VarInt}}
  |-
+
| {{Type|VarInt}}
  | Palette Length
+
|
  | Optional Unsigned Byte
+
{{Metadata type definition|VarLong}}
  | Length of the following array
+
| {{Type|VarLong}}
  |-
+
|
  | Palette
+
{{Metadata type definition|Float}}
  | Optional Array of VarInt
+
  | {{Type|Float}}
  | Mapping of block state IDs in the {{Minecraft Wiki|Data values#Block IDs|global palette}} (<code>type = x >> 4</code>, <code>meta = x & 15</code>) to indices of this array
+
  |
|-
+
{{Metadata type definition|String}}
  | Data Array Length
+
| {{Type|String}}
| VarInt
+
|
  | Number of bytes in the following array, divided by 8
+
{{Metadata type definition|Text Component}}
  |-
+
| {{Type|Text Component}}
| Data Array
+
  |
  | Byte Array
+
{{Metadata type definition|Optional Text Component}}
  | List of indices pointing to state IDs in the Palette
+
  | ({{Type|Boolean}}, {{Type|Optional}} {{Type|Text Component}})
  |-
+
| Text Component is present if the Boolean is set to true.
  | Block Light
+
{{Metadata type definition|Slot}}
  | Byte Array
+
| {{Type|Slot}}
  | Half byte per block
+
|
  |-
+
{{Metadata type definition|Boolean}}
  | Sky Light
+
| {{Type|Boolean}}
  | Optional Byte Array
+
|
  | Only if in the Overworld; half byte per block
+
{{Metadata type definition|Rotations}}
 +
| ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
 +
  | rotation on x, rotation on y, rotation on z
 +
{{Metadata type definition|Position}}
 +
  | {{Type|Position}}
 +
  |
 +
{{Metadata type definition|Optional Position}}
 +
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|Position}})
 +
  | Position is present if the Boolean is set to true.
 +
{{Metadata type definition|Direction}}
 +
  | {{Type|VarInt}} {{Type|Enum}}
 +
  | Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5
 +
{{Metadata type definition|Optional UUID}}
 +
  | ({{Type|Boolean}}, {{Type|Optional}} {{Type|UUID}})
 +
| UUID is present if the Boolean is set to true.
 +
{{Metadata type definition|Block State}}
 +
| {{Type|VarInt}}
 +
  | An ID in the block state registry.
 +
{{Metadata type definition|Optional Block State}}
 +
| {{Type|VarInt}}
 +
| 0 for absent (air is unrepresentable); otherwise, an ID in the block state registry.
 +
{{Metadata type definition|NBT}}
 +
| {{Type|NBT}}
 +
|
 +
{{Metadata type definition|Particle}}
 +
| ({{Type|VarInt}}, Varies)
 +
| particle type (an ID in the <code>minecraft:particle_type</code> registry), particle data (See [[Particles]].)
 +
{{Metadata type definition|Villager Data}}
 +
| ({{Type|VarInt}}, {{Type|VarInt}}, {{Type|VarInt}})
 +
| villager type, villager profession, level (See below.)
 +
{{Metadata type definition|Optional VarInt}}
 +
| {{Type|VarInt}}
 +
| 0 for absent; 1 + actual value otherwise. Used for entity IDs.
 +
{{Metadata type definition|Pose}}
 +
| {{Type|VarInt}} {{Type|Enum}}
 +
| STANDING = 0, FALL_FLYING = 1, SLEEPING = 2, SWIMMING = 3, SPIN_ATTACK = 4, SNEAKING = 5, LONG_JUMPING = 6, DYING = 7, CROAKING = 8, USING_TONGUE = 9, SITTING = 10, ROARING = 11, SNIFFING = 12, EMERGING = 13, DIGGING = 14{{change||2=, SLIDING = 15, SHOOTING = 16, INHALING = 17}}
 +
{{Metadata type definition|Cat Variant}}
 +
| {{Type|VarInt}}
 +
| An ID in the <code>minecraft:cat_variant</code> registry.
 +
{{Metadata type definition|Frog Variant}}
 +
  | {{Type|VarInt}}
 +
  | An ID in the <code>minecraft:frog_variant</code> registry.
 +
{{Metadata type definition|Optional Global Position}}
 +
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|Identifier}}, {{Type|Optional}} {{Type|Position}})
 +
  | dimension identifier, position; only if the Boolean is set to true.
 +
{{Metadata type definition|Painting Variant}}
 +
  | {{Type|VarInt}}
 +
  | An ID in the <code>minecraft:painting_variant</code> registry.
 +
{{Metadata type definition|Sniffer State}}
 +
  | {{Type|VarInt}} {{Type|Enum}}
 +
  | IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
 +
{{Metadata type definition|Armadillo State|rel=added}}
 +
  | {{Type|VarInt}} {{Type|Enum}}
 +
  | IDLE = 0, ROLLING = 1, SCARED = 2
 +
{{Metadata type definition|Vector3}}
 +
  | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
 +
  | x, y, z
 +
{{Metadata type definition|Quaternion}}
 +
  | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}}, {{Type|Float}})
 +
  | x, y, z, w
 
  |}
 
  |}
  
=== Entity Metadata ===
+
=== Armadillo ===
  
Format is now an array of entries, each of which looks like the following:
+
{{Metadata inherit|Armadillo|inherits=Animal|start_at=17}}
 
+
{| class="wikitable" {{added}}
{| class="wikitable"
+
  ! Index
  ! Name
 
 
  ! Type
 
  ! Type
  ! Meaning
+
  !style="width: 250px;" colspan="2"| Meaning
  |-
+
  ! Default
| Index
 
| Unsigned Byte
 
| Unique index key determining the meaning of the following value, see the table below. If this is <code>0xff</code> then the it is the end of the Entity Metadata array and no more is read.
 
|-
 
| Type
 
| Optional Unsigned Byte
 
| Only if Index is not <code>0xff</code>; the type of the index, see the table below
 
 
  |-
 
  |-
  | Value
+
  | {{Metadata id|added}}
  | Optional ''value of Type''
+
| {{Metadata type|Armadillo State}}
  | Only if Index is not <code>0xff</code>: the value of the metadata field
+
  |colspan="2"| Armadillo State
 +
  | IDLE
 
  |}
 
  |}
  
{| class="wikitable"
+
== Block Actions ==
! Value of Type field
 
! Type of Value field
 
! Notes
 
|-
 
| 0
 
| Byte
 
|
 
|-
 
| 1
 
| VarInt
 
|
 
|-
 
| 2
 
| Float
 
|
 
|-
 
| 3
 
| String
 
|
 
|-
 
| 4
 
| [[Chat]]
 
|
 
|-
 
| 5
 
| [[Slot]]
 
|
 
|-
 
| 6
 
| Boolean
 
|
 
|-
 
| 7
 
| Vector3F (Array of Float)
 
| 3 elements
 
|-
 
| 8
 
| Position
 
|
 
|-
 
| 9
 
| OptPosition (Boolean + Optional Position)
 
| Position is present if the Boolean is set to true
 
|-
 
| 10
 
| Direction (VarInt)
 
| ???
 
|-
 
| 11
 
| OptUUID (Boolean + Optional UUID)
 
| UUID is present if the Boolean is set to true
 
|}
 
  
{| class="wikitable"
+
No changes so far.
! Entity class
 
! Index
 
! Type
 
! Meaning
 
|-
 
|rowspan="5"| Entity
 
| 0
 
| Byte
 
| ''Unknown''
 
|-
 
| 1
 
| VarInt
 
| ''Unknown''
 
|-
 
| 2
 
| String
 
| ''Unknown''
 
|-
 
| 3
 
| Boolean
 
| ''Unknown''
 
|-
 
| 4
 
| Boolean
 
| ''Unknown''
 
|-
 
|rowspan="4"| AreaEffectCloud <sup>extends Entity</sup>
 
| 5
 
| Float
 
| ''Unknown''
 
|-
 
| 6
 
| VarInt
 
| ''Unknown''
 
|-
 
| 7
 
| Boolean
 
| ''Unknown''
 
|-
 
| 8
 
| VarInt
 
| ''Unknown''
 
|-
 
| Arrow <sup>extends Entity</sup>
 
| 5
 
| Byte
 
| ''Unknown''
 
|-
 
| TippedArrow <sup>extends Arrow</sup>
 
| 6
 
| VarInt
 
| ''Unknown''
 
|-
 
|rowspan="3"| Boat <sup>extends Entity</sup>
 
| 5
 
| VarInt
 
| ''Unknown''
 
|-
 
| 6
 
| VarInt
 
| ''Unknown''
 
|-
 
| 7
 
| Float
 
| ''Unknown''
 
|-
 
| EnderCrystal <sup>extends Entity</sup>
 
| 5
 
| OptPosition
 
| ''Unknown''
 
|-
 
| Fireball <sup>extends Entity</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
| WitherSkull <sup>extends Fireball</sup>
 
| 5
 
| Boolean
 
| ''Unknown''
 
|-
 
| Fireworks <sup>extends Entity</sup>
 
| 5
 
| [[Slot]]
 
| ''Unknown''
 
|-
 
| Hanging <sup>extends Entity</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
|rowspan="2"| ItemFrame <sup>extends Hanging</sup>
 
| 5
 
| [[Slot]]
 
| ''Unknown''
 
|-
 
| 6
 
| VarInt
 
| ''Unknown''
 
|-
 
| Item <sup>extends Entity</sup>
 
| 5
 
| [[Slot]]
 
| ''Unknown''
 
|-
 
|rowspan="5"| Living <sup>extends Entity</sup>
 
| 5
 
| Byte
 
| ''Unknown''
 
|-
 
| 6
 
| Float
 
| ''Unknown''
 
|-
 
| 7
 
| VarInt
 
| ''Unknown''
 
|-
 
| 8
 
| Boolean
 
| ''Unknown''
 
|-
 
| 9
 
| VarInt
 
| ''Unknown''
 
|-
 
|rowspan="7"| ArmorStand <sup>extends Living</sup>
 
| 10
 
| Byte
 
| ''Unknown''
 
|-
 
| 11
 
| Vector3F
 
| ''Unknown''
 
|-
 
| 12
 
| Vector3F
 
| ''Unknown''
 
|-
 
| 13
 
| Vector3F
 
| ''Unknown''
 
|-
 
| 14
 
| Vector3F
 
| ''Unknown''
 
|-
 
| 15
 
| Vector3F
 
| ''Unknown''
 
|-
 
| 16
 
| Vector3F
 
| ''Unknown''
 
|-
 
| Insentient <sup>extends Living</sup>
 
| 10
 
| Byte
 
| ''Unknown''
 
|-
 
| Ambient <sup>extends Insentient</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
| Bat <sup>extends Ambient</sup>
 
| 11
 
| Byte
 
| ''Unknown''
 
|-
 
| Creature <sup>extends Insentient</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
| Ageable <sup>extends Creature</sup>
 
| 11
 
| Boolean
 
| ''Unknown''
 
|-
 
| Animal <sup>extends Ageable</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
|rowspan="5"| Horse <sup>extends Animal</sup>
 
| 12
 
| Byte
 
| ''Unknown''
 
|-
 
| 13
 
| VarInt
 
| ''Unknown''
 
|-
 
| 14
 
| VarInt
 
| ''Unknown''
 
|-
 
| 15
 
| OptUUID
 
| ''Unknown''
 
|-
 
| 16
 
| VarInt
 
| ''Unknown''
 
|-
 
| Pig <sup>extends Animal</sup>
 
| 12
 
| Boolean
 
| ''Unknown''
 
|-
 
| Rabbit <sup>extends Animal</sup>
 
| 12
 
| VarInt
 
| ''Unknown''
 
|-
 
| Sheep <sup>extends Animal</sup>
 
| 12
 
| Byte
 
| ''Unknown''
 
|-
 
|rowspan="2"| TameableAnimal <sup>extends Animal</sup>
 
| 12
 
| Byte
 
| ''Unknown''
 
|-
 
| 13
 
| OptUUID
 
| ''Unknown''
 
|-
 
| Ocelot <sup>extends TameableAnimal</sup>
 
| 14
 
| VarInt
 
| ''Unknown''
 
|-
 
|rowspan="3"| Wolf <sup>extends TameableAnimal</sup>
 
| 14
 
| Float
 
| ''Unknown''
 
|-
 
| 15
 
| Boolean
 
| ''Unknown''
 
|-
 
| 16
 
| VarInt
 
| ''Unknown''
 
|-
 
| Villager <sup>extends Ageable</sup>
 
| 12
 
| VarInt
 
| ''Unknown''
 
|-
 
| Golem <sup>extends Creature</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
| IronGolem <sup>extends Golem</sup>
 
| 11
 
| Byte
 
| ''Unknown''
 
|-
 
|rowspan="3"| Shulker <sup>extends Golem</sup>
 
| 11
 
| Direction
 
| ''Unknown''
 
|-
 
| 12
 
| OptPosition
 
| ''Unknown''
 
|-
 
| 13
 
| Byte
 
| ''Unknown''
 
|-
 
| Monster <sup>extends Creature</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
| Blaze <sup>extends Monster</sup>
 
| 11
 
| Byte
 
| ''Unknown''
 
|-
 
|rowspan="3"| Creeper <sup>extends Monster</sup>
 
| 11
 
| VarInt
 
| ''Unknown''
 
|-
 
| 12
 
| Boolean
 
| ''Unknown''
 
|-
 
| 13
 
| Boolean
 
| ''Unknown''
 
|-
 
|rowspan="2"| Guardian <sup>extends Monster</sup>
 
| 11
 
| Byte
 
| ''Unknown''
 
|-
 
| 12
 
| VarInt
 
| ''Unknown''
 
|-
 
|rowspan="2"| Skeleton <sup>extends Monster</sup>
 
| 11
 
| VarInt
 
| ''Unknown''
 
|-
 
| 12
 
| Boolean
 
| ''Unknown''
 
|-
 
| Spider <sup>extends Monster</sup>
 
| 11
 
| Byte
 
| ''Unknown''
 
|-
 
| Witch <sup>extends Monster</sup>
 
| 11
 
| Boolean
 
| ''Unknown''
 
|-
 
|rowspan="4"| Wither <sup>extends Monster</sup>
 
| 11
 
| VarInt
 
| ''Unknown''
 
|-
 
| 12
 
| VarInt
 
| ''Unknown''
 
|-
 
| 13
 
| VarInt
 
| ''Unknown''
 
|-
 
| 14
 
| VarInt
 
| ''Unknown''
 
|-
 
|rowspan="3"| Zombie <sup>extends Monster</sup>
 
| 11
 
| Boolean
 
| ''Unknown''
 
|-
 
| 12
 
| Boolean
 
| ''Unknown''
 
|-
 
| 13
 
| Boolean
 
| ''Unknown''
 
|-
 
| EnderDragon <sup>extends Insentient</sup>
 
| 11
 
| VarInt
 
| ''Unknown''
 
|-
 
| Flying <sup>extends Insentient</sup>
 
|colspan="3"| ''no additional metadata''
 
|-
 
| Ghast <sup>extends Flying</sup>
 
| 11
 
| Boolean
 
| ''Unknown''
 
|-
 
| Slime <sup>extends Insentient</sup>
 
| 11
 
| VarInt
 
| ''Unknown''
 
|-
 
|rowspan="6"| Minecart <sup>extends Entity</sup>
 
| 5
 
| VarInt
 
| ''Unknown''
 
|-
 
| 6
 
| VarInt
 
| ''Unknown''
 
|-
 
| 7
 
| Float
 
| ''Unknown''
 
|-
 
| 8
 
| VarInt
 
| ''Unknown''
 
|-
 
| 9
 
| VarInt
 
| ''Unknown''
 
|-
 
| 10
 
| Boolean
 
| ''Unknown''
 
|-
 
|rowspan="2"| MinecartCommandBlock <sup>extends Minecart</sup>
 
| 11
 
| String
 
| ''Unknown''
 
|-
 
| 12
 
| [[Chat]]
 
| ''Unknown''
 
|-
 
| MinecartFurnace <sup>extends Minecart</sup>
 
| 11
 
| Boolean
 
| ''Unknown''
 
|-
 
| TNTPrimed <sup>extends Entity</sup>
 
| 5
 
| VarInt
 
| ''Unknown''
 
|}
 
  
Entity classes also recursively use fields from classes they extend.
+
== Inventories ==
  
== Handshaking ==
+
No changes so far.
  
=== Clientbound ===
+
== Plugin Channels ==
  
 
No changes so far.
 
No changes so far.
 +
 +
== Handshake ==
  
 
=== Serverbound ===
 
=== Serverbound ===
Line 693: Line 337:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| 0x00
+
  | rowspan="4"| 0x00
  |rowspan="4"| Handshaking
+
  | rowspan="4"| Handshaking
  |rowspan="4"| Server
+
  | rowspan="4"| Server
 
  | Protocol Version
 
  | Protocol Version
  | VarInt
+
  | [[#Definitions:varint|VarInt]]
  | See [[protocol version numbers]] (currently {{Change|47|69}})
+
  | See [[protocol version numbers]] (currently 765 in Minecraft 1.20.4).
 
  |-
 
  |-
 
  | Server Address
 
  | Server Address
  | String
+
  | [[#Definitions:string|String]] (255)
  | hostname or IP, e.g. localhost or 127.0.0.1<!-- does this support IPv6? -->
+
  | 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
 
  | Server Port
  | Unsigned Short
+
  | [[#Definitions:unsigned-short|Unsigned Short]]
  | default is 25565
+
  | Default is 25565. The Notchian server does not use this information.
 
  |-
 
  |-
 
  | Next State
 
  | Next State
  | VarInt
+
  | [[#Definitions:varint|VarInt]] [[#Definitions:enum|Enum]]
  | 1 for [[#Status|status]], 2 for [[#Login|login]]
+
  | 1 for [[#Status|Status]], 2 for [[#Login|Login]]{{change||, 3 for [[#Login|Transfer]]}}.
 
  |}
 
  |}
  
== Play ==
+
== Status ==
  
 
=== Clientbound ===
 
=== Clientbound ===
  
==== Entity Equipment ====
+
No changes so far.
  
{| class="wikitable"
+
=== Serverbound ===
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| 0x04
 
|rowspan="3"| Play
 
|rowspan="3"| Client
 
| Entity ID
 
| VarInt
 
| Entity's EID
 
|-
 
| Slot
 
| {{Change|Short|VarInt}}
 
| Equipment slot. 0: main hand, {{Change||1: off hand}}, {{Change|1–4|2–5}}: armor slot (2: boots, 3: leggings, 4: chestplate, 5: helmet)
 
|-
 
| Item
 
| [[Slot Data|Slot]]
 
| Item in slot format
 
|}
 
  
==== Spawn Player ====
+
No changes so far.
  
This packet is sent by the server when a player comes into visible range, ''not'' when a player joins.
+
== Login ==
  
This packet must be sent after the [[Protocol#Player List Item|Player List Item]] ([[#Play|Play]], 0x38, clientbound) packet that adds the player data for the client to use when spawning a player. The tab includes skin/cape data.
+
=== Clientbound ===
  
Servers can, however, safely spawn player entities for players not in visible range. The client appears to handle it correctly.
+
==== Cookie Request (login) ====
  
When in online-mode the UUIDs must be valid and have valid skin blobs, in offline-mode UUID v3 is used.
+
Requests a cookie that was previously stored.
  
For NPCs UUID v2 should be used. Note:
+
{| class="wikitable" {{added}}
 
 
<+Grum> i will never confirm this as a feature you know that :)
 
 
 
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>.
 
 
 
{| 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="9"| 0x0C
+
  | rowspan="1"| 0x05
  |rowspan="9"| Play
+
  | rowspan="1"| Login
  |rowspan="9"| Client
+
  | rowspan="1"| Client
  | Entity ID
+
  | colspan="2"| Key
| VarInt
+
  | colspan="2"| Identifier
| Player's EID
+
  | The identifier of the cookie.
|-
 
| Player UUID
 
| UUID
 
|
 
|-
 
| X
 
| Int
 
| Player X as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
 
|-
 
| Y
 
| Int
 
| Player Y as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
 
|-
 
| Z
 
| Int
 
| Player Z as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
 
  |-
 
| Yaw
 
| Angle
 
|
 
|-
 
| Pitch
 
| Angle
 
|
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Current Item
 
| Short
 
  | The item the player is currently holding. Note that this should be 0 for “no item”, unlike -1 used in other packets.
 
|-
 
| Metadata
 
| [[#Entity Metadata|Entity Metadata]]
 
|
 
 
  |}
 
  |}
  
==== Spawn Object ====
+
=== Serverbound ===
  
Sent by the server when an object/vehicle is created.
+
==== Cookie Response (login) ====
  
{| class="wikitable"
+
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.
 +
 
 +
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="13"| 0x0E
+
  | rowspan="3"| 0x04
  |rowspan="13"| Play
+
  | rowspan="3"| Login
  |rowspan="13"| Client
+
  | rowspan="3"| Server
  | Entity ID
+
  | colspan="2"| Key
| VarInt
+
  | colspan="2"| Identifier
| EID of the object
+
  | The identifier of the cookie.
  |- style="background-color: #d9ead3;"
 
| Object UUID
 
| UUID
 
|
 
|-
 
| Type
 
| Byte
 
  | The type of object (See [[Entities#Objects]])
 
 
  |-
 
  |-
  | X
+
  | colspan="2"| Has Payload
  | Int
+
  | colspan="2"| Boolean
  | X position as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
+
  | The payload is only present if the cookie exists on the client.
 
  |-
 
  |-
  | Y
+
  | colspan="2"| Payload
| Int
+
  | colspan="2"| Optional ByteArray(5120)
| Y position as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
+
  | The data of the cookie, if any.
|-
 
| Z
 
| Int
 
| Z position as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
 
|-
 
| Pitch
 
| Angle
 
|
 
|-
 
| Yaw
 
| Angle
 
|
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Data
 
| [[Object Data]]
 
|  
 
  |-  style="background-color: #d9ead3;"
 
| Info
 
  | Int
 
| Depends on Type; see [[Object Data#Meaning of int field]]
 
|-  style="background-color: #d9ead3;"
 
| Velocity X
 
| Short
 
|
 
|-  style="background-color: #d9ead3;"
 
| Velocity Y
 
| Short
 
|
 
|-  style="background-color: #d9ead3;"
 
| Velocity Z
 
| Short
 
 
 
  |}
 
  |}
  
==== Spawn Mob ====
+
== Configuration ==
  
Sent by the server when a mob entity is spawned.
+
=== Clientbound ===
  
{| class="wikitable"
+
==== Cookie Request (configuration) ====
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="13"| 0x0F
 
|rowspan="13"| Play
 
|rowspan="13"| Client
 
| Entity ID
 
| VarInt
 
|
 
|- style="background-color: #d9ead3;"
 
| Entity UUID
 
| UUID
 
|
 
|-
 
| Type
 
| Unsigned Byte
 
| The type of mob. See [[Entities#Mobs]]
 
|-
 
| X
 
| Int
 
| X position as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
 
|-
 
| Y
 
| Int
 
| Y position as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
 
|-
 
| Z
 
| Int
 
| Z position as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
 
|-
 
| Yaw
 
| Angle
 
|
 
|-
 
| Pitch
 
| Angle
 
|
 
|-
 
| Head Pitch
 
| Angle
 
|
 
|-
 
| Velocity X
 
| Short
 
| Same units as [[Protocol#Entity Velocity|Entity Velocity]]
 
|-
 
| Velocity Y
 
| Short
 
| Same units as [[Protocol#Entity Velocity|Entity Velocity]]
 
|-
 
| Velocity Z
 
| Short
 
| Same units as [[Protocol#Entity Velocity|Entity Velocity]]
 
|-
 
| Metadata
 
| [[#Entity Metadata|Entity Metadata]]
 
|
 
|}
 
  
==== Entity Status ====
+
Requests a cookie that was previously stored.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="2"| 0x1A
+
  | rowspan="1"| 0x00
  |rowspan="2"| Play
+
  | rowspan="1"| Configuration
  |rowspan="2"| Client
+
  | rowspan="1"| Client
  | Entity ID
+
  | colspan="2"| Key
| Int
+
  | colspan="2"| Identifier
  |  
+
  | The identifier of the cookie.
|-
 
| Entity Status
 
| Byte
 
  | See below
 
 
  |}
 
  |}
  
{| class="wikitable"
+
==== Store Cookie (configuration) ====
|-
 
! Entity Status
 
! Meaning
 
|-
 
| 1
 
| Sent when resetting a mob spawn minecart's timer — appears to be unused by the client
 
|-
 
| 2
 
| Living Entity hurt
 
|-
 
| 3
 
| Living Entity dead
 
|-
 
| 4
 
| Iron Golem throwing up arms
 
|-
 
| 6
 
| Wolf/Ocelot/Horse taming — Spawn “heart” particles
 
|-
 
| 7
 
| Wolf/Ocelot/Horse tamed — Spawn “smoke” particles
 
|-
 
| 8
 
| Wolf shaking water — Trigger the shaking animation
 
|-
 
| 9
 
| (of self) Eating accepted by server
 
|-
 
| 10
 
| Sheep eating grass
 
|-
 
| 10
 
| Play TNT ignite sound
 
|-
 
| 11
 
| Iron Golem handing over a rose
 
|-
 
| 12
 
| Villager mating — Spawn “heart” particles
 
|-
 
| 13
 
| Spawn particles indicating that a villager is angry and seeking revenge
 
|-
 
| 14
 
| Spawn happy particles near a villager
 
|-
 
| 15
 
| Witch animation — Spawn “magic” particles
 
|-
 
| 16
 
| Play zombie converting into a villager sound
 
|-
 
| 17
 
| Firework exploding
 
|-
 
| 18
 
| Animal in love (ready to mate) — Spawn “heart” particles
 
|-
 
| 19
 
| Reset squid rotation
 
|-
 
| 20
 
| Spawn explosion particle — works for some living entities
 
|-
 
| 21
 
| Play guardian sound — works for every entity
 
|-
 
| 22
 
| Enables reduced {{Minecraft Wiki|Debug screen|debug}} for players
 
|-
 
| 23
 
| Disables reduced {{Minecraft Wiki|Debug screen|debug}} for players
 
|- style="background-color: #d9ead3;"
 
| 24–28
 
| Sets {{Minecraft Wiki|Server.properties#op-permission-level|op permission level}} 0–4 for players
 
|}
 
  
==== Entity Properties ====
+
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"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  !colspan="2"| Field Name
+
  ! colspan="2"| Field Name
  !colspan="2"| Field Type
+
  ! colspan="2"| Field Type
! Notes
 
|-
 
|rowspan="6"| 0x20
 
|rowspan="6"| Play
 
|rowspan="6"| Client
 
|colspan="2"| Entity ID
 
|colspan="2"| VarInt
 
|
 
|-
 
|colspan="2"| Number Of Properties
 
|colspan="2"| Int
 
| Number of elements in the following array
 
|-
 
|rowspan="4"| Property
 
| Key
 
|rowspan="4"| Array
 
| String
 
| See below
 
|-
 
| Value
 
| Double
 
| See below
 
|-
 
| Number Of Modifiers
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Modifiers
 
| Array of Modifier Data
 
| See {{Minecraft Wiki|Attribute#Modifiers}}
 
|}
 
 
 
Known Key values:
 
 
 
{| class="wikitable"
 
|-
 
! Key
 
! Default
 
! Min
 
! Max
 
! Label
 
|-
 
| generic.maxHealth
 
| 20.0
 
| 0.0
 
| {{Change|Double.MaxValue|1024.0}}
 
| Max Health
 
|-
 
| generic.followRange
 
| 32.0
 
| 0.0
 
| 2048.0
 
| Follow Range
 
|-
 
| generic.knockbackResistance
 
| 0.0
 
| 0.0
 
| 1.0
 
| Knockback Resistance
 
|-
 
| generic.movementSpeed
 
| 0.699999988079071
 
| 0.0
 
| {{Change|Double.MaxValue|1024.0}}
 
| Movement Speed
 
|-
 
| generic.attackDamage
 
| 2.0
 
| 0.0
 
| {{Change|Double.MaxValue|2048.0}}
 
| {{Change||Attack Damage}}
 
|- style="background-color: #d9ead3;"
 
| generic.attackSpeed
 
| 4.0
 
| 0.0
 
| 1024.0
 
| Attack Speed
 
|-
 
| horse.jumpStrength
 
| 0.7
 
| 0.0
 
| 2.0
 
| Jump Strength
 
|-
 
| zombie.spawnReinforcements
 
| 0.0
 
| 0.0
 
| 1.0
 
| Spawn Reinforcements Chance
 
|}
 
 
 
''Modifier Data'' structure:
 
 
 
{| class="wikitable"
 
|-
 
! Field Name
 
! Field Type
 
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | UUID
+
  | rowspan="2"| 0x09
  | UUID
+
  | rowspan="2"| Configuration
  |  
+
  | rowspan="2"| Client
  |-
+
  | colspan="2"| Key
  | Amount
+
  | colspan="2"| Identifier
| Double
+
  | The identifier of the cookie.
  |  
 
 
  |-
 
  |-
  | Operation
+
  | colspan="2"| Payload
  | Byte
+
  | colspan="2"| ByteArray(5120)
  |  
+
  | The data of the cookie.
 
  |}
 
  |}
  
==== Chunk Data ====
+
==== Transfer (configuration) ====
  
Chunk pillars are not unloaded by the client automatically. To unload chunk pillars, {{Change|send this packet with Ground-Up Continuous{{=}}true and no 16^3 chunks (eg. Primary Bit Mask{{=}}0)|send an [[#Unload Chunk|Unload Chunk]] packet with the chunk's X and Z coordinates}}. The server only sends skylight information for chunk pillars in the 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.
+
Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="7"| 0x21
+
  | rowspan="2"| 0x0A
  |rowspan="7"| Play
+
  | rowspan="2"| Configuration
  |rowspan="7"| Client
+
  | rowspan="2"| Client
  | Chunk X
+
  | colspan="2"| Host
  | Int
+
  | colspan="2"| String
  | Chunk X coordinate
+
  | The hostname of IP of the server.
 
  |-
 
  |-
  | Chunk Z
+
  | colspan="2"| Port
| Int
+
  | colspan="2"| VarInt
| Chunk Z coordinate
+
  | The port of the server.
|-
 
| Ground-Up Continuous
 
| Boolean
 
  | This is true if the packet represents all chunk sections in this vertical chunk column, where the Primary Bit Mask specifies exactly which chunk sections are included, and which are air.
 
|-
 
| Primary Bit Mask
 
| {{Change|Unsigned Short|Unsigned Int}}
 
| Bitmask with bits set to 1 for every 16×16×16 chunk section whose data follows in the compressed data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15). Will change to a VarInt in the next snapshot.
 
|-
 
| Size
 
| VarInt
 
| Size of Data in bytes
 
|-
 
| Data
 
| Array of [[#Chunk Section|Chunk Section]]
 
  | The length of the array is equal to the number of bits set in Primary Bit Mask.
 
|-
 
| Biomes
 
| Optional Byte Array
 
| Only if Ground-Up Continuous: biome array, byte per XZ coordinate, 256 bytes total.
 
 
  |}
 
  |}
  
==== {{Change||Unload Chunk}} ====
+
=== Serverbound ===
  
Tells the client to unload a chunk.
+
==== Cookie Response (configuration) ====
  
{| class="wikitable"
+
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.
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| 0x22
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Chunk X
 
| Int
 
| Chunk X coordinate
 
|-
 
| Chunk Z
 
| Int
 
| Chunk Z coordinate
 
|}
 
  
==== Multi Block Change ====
+
{| class="wikitable" {{added}}
Fired whenever 2 or more blocks are changed within the render distance.
 
{| class="wikitable"
 
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  !colspan="2"| Field Name
+
  ! colspan="2"| Field Name
  !colspan="2"| Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="6"| {{Change|0x22|0x23}}
+
  | rowspan="3"| 0x01
  |rowspan="6"| Play
+
  | rowspan="3"| Configuration
  |rowspan="6"| Client
+
  | rowspan="3"| Server
  |colspan="2"| Chunk X
+
  | colspan="2"| Key
  |colspan="2"| Int
+
  | colspan="2"| Identifier
| Chunk X coordinate
+
  | The identifier of the cookie.
|-
 
  |colspan="2"| Chunk Z
 
|colspan="2"| Int
 
| Chunk Z coordinate
 
|-
 
|colspan="2"| Record Count
 
|colspan="2"| VarInt
 
| Number of elements in the following array, i.e. the number of blocks affected
 
 
  |-
 
  |-
  |rowspan="3"| Record
+
  | colspan="2"| Has Payload
  | Horizontal Position
+
  | colspan="2"| Boolean
|rowspan="3"| Array
+
  | The payload is only present if the cookie exists on the client.
  | Unsigned Byte
 
| The 4 most significant bits (<code>0xF0</code>) encode the X coordinate, relative to the chunk. The 4 least significant bits (<code>0x0F</code>) encode the Z coordinate, relative to the chunk.
 
 
  |-
 
  |-
  | Y Coordinate
+
  | colspan="2"| Payload
| Unsigned Byte
+
  | colspan="2"| Optional ByteArray(5120)
  |  
+
  | The data of the cookie, if any.
|-
 
| Block ID
 
| VarInt
 
  | The new block ID for the block. <code><nowiki>id &lt;&lt; 4 | data</nowiki></code>
 
 
  |}
 
  |}
  
==== Block Change ====
+
== Play ==
Fired whenever a block is changed within the render distance.
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| {{Change|0x23|0x24}}
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| Location
 
| Position
 
| Block Coordinates
 
|-
 
| Block ID
 
| VarInt
 
| The new block ID for the block. <code><nowiki>id &lt;&lt; 4 | data</nowiki></code>
 
|}
 
  
==== Block Action ====
+
=== Clientbound ===
 
 
This packet is used for a number of things:
 
  
* Chests opening and closing
+
==== Cookie Request (play) ====
* Pistons pushing and pulling
 
* Note blocks playing
 
* Updating beacons
 
  
See Also: [[Block Actions]]
+
Requests a cookie that was previously stored.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| {{Change|0x24|0x25}}
+
  | rowspan="1"| 0x16
  |rowspan="4"| Play
+
  | rowspan="1"| Play
  |rowspan="4"| Client
+
  | rowspan="1"| Client
  | Location
+
  | colspan="2"| Key
| Position
+
  | colspan="2"| Identifier
  | Block Coordinates
+
  | The identifier of the cookie.
|-
 
| Byte 1
 
| Unsigned Byte
 
| Varies depending on block — see [[Block Actions]]
 
|-
 
| Byte 2
 
| Unsigned Byte
 
| Varies depending on block — see [[Block Actions]]
 
|-
 
| Block Type
 
| VarInt
 
  | The block type for the block
 
 
  |}
 
  |}
  
==== Block Break Animation ====
+
==== Store Cookie (play) ====
 
 
0–9 are the displayable destroy stages and each other number means that there is no animation on this coordinate.
 
 
 
You can also set an animation to air! The animation will still be visible.
 
 
 
If you need to display several break animations at the same time you have to give each of them a unique Entity ID.
 
  
Also if you set the coordinates to a special block like water etc. it won't show the actual break animation but some other interesting effects. (Water will lose it's transparency)
+
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"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="3"| {{Change|0x25|0x26}}
+
  | rowspan="2"| 0x6A
  |rowspan="3"| Play
+
  | rowspan="2"| Play
  |rowspan="3"| Client
+
  | rowspan="2"| Client
  | Entity ID
+
  | colspan="2"| Key
  | VarInt
+
  | colspan="2"| Identifier
  | EID for the animation
+
  | The identifier of the cookie.
 
  |-
 
  |-
  | Location
+
  | colspan="2"| Payload
| Position
+
  | colspan="2"| ByteArray(5120)
| Block Position
+
  | The data of the cookie.
  |-
 
| Destroy Stage
 
| Byte
 
  | 0–9 to set it, any other value to remove it
 
 
  |}
 
  |}
  
==== {{Change|Map Chunk Bulk|}} ====
+
==== Transfer (play) ====
 
 
Replaced by multiple [[#Chunk Data|Chunk Data]] packets.
 
 
 
==== Maps ====
 
  
Updates a rectangular area on a {{Minecraft Wiki|map}} item.
+
Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  !colspan="2"| Field Name
+
  ! colspan="2"| Field Name
  !colspan="2"| Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="13"| 0x34
+
  | rowspan="2"| 0x72
  |rowspan="13"| Play
+
  | rowspan="2"| Play
  |rowspan="13"| Client
+
  | rowspan="2"| Client
  |colspan="2"| Item Damage
+
  | colspan="2"| Host
  |colspan="2"| VarInt
+
  | colspan="2"| String
  | The damage value (map ID) of the map being modified
+
  | The hostname of IP of the server.
 
  |-
 
  |-
  |colspan="2"| Scale
+
  | colspan="2"| Port
|colspan="2"| Byte
+
  | colspan="2"| VarInt
| From 0 for a fully zoomed-in map (1 block per pixel) to 4 for a fully zoomed-out map (16 blocks per pixel)
+
  | The port of the server.
|- style="background-color: #d9ead3;"
 
|colspan="2" | Tracking Position
 
|colspan="2" | Boolean
 
| Specifies whether the icons are shown
 
|-
 
|colspan="2"| Icon Count
 
  |colspan="2"| VarInt
 
  | Number of elements in the following array
 
|-
 
|rowspan="3"| Icon
 
| Direction And Type
 
|rowspan="3"| Array
 
| Byte
 
| 0xF0 = Direction, 0x0F = Type
 
|-
 
| X
 
| Byte
 
|
 
|-
 
| Z
 
| Byte
 
|
 
|-
 
|colspan="2"| Columns
 
|colspan="2"| Byte
 
| Number of columns updated
 
|-
 
|colspan="2"| Rows
 
|colspan="2"| Optional Byte
 
| Only if Columns is more than 0; number of rows updated
 
|-
 
|colspan="2"| X
 
|colspan="2"| Optional Byte
 
| Only if Columns is more than 0; x offset of the westernmost column
 
|-
 
|colspan="2"| Z
 
|colspan="2"| Optional Byte
 
| Only if Columns is more than 0; z offset of the northernmost row
 
|-
 
|colspan="2"| Length
 
|colspan="2"| Optional VarInt
 
| Only if Columns is more than 0; length of the following array
 
|-
 
|colspan="2"| Data
 
|colspan="2"| Optional Array of Unsigned Byte
 
| Only if Columns is more than 0; see {{Minecraft Wiki|Map item format}}
 
 
  |}
 
  |}
  
==== Combat Event ====
+
==== Update Attributes ====
 +
 
 +
Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,446: Line 603:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  !colspan="2"| Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="8"| 0x42
+
  | rowspan="6"| 0x71
  |rowspan="8"| Play
+
  | rowspan="6"| Play
  |rowspan="8"| Client
+
  | rowspan="6"| Client
  |colspan="2"| Event
+
  | colspan="2"| Entity ID
  | VarInt
+
  | colspan="2"| VarInt
  | Determines the layout of the remaining packet
+
  |
 
  |-
 
  |-
  ! Event
+
  | colspan="2"| Number Of Properties
  ! Field Name
+
  | colspan="2"| VarInt
  !
+
  | Number of elements in the following array.
!
 
 
  |-
 
  |-
  | 0: enter combat
+
  | rowspan="4"| Property
  | ''no fields''
+
  | {{change|Key|Id}}
  | ''no fields''
+
  | rowspan="4"| Array
  |  
+
| {{change|Identifier|VarInt Enum}}
 +
  | See below.
 
  |-
 
  |-
  |rowspan="2"| 1: end combat
+
  | Value
| Duration
+
  | Double
  | VarInt
+
  | See below.
  |  
 
 
  |-
 
  |-
  | Entity ID
+
  | Number Of Modifiers
| Int
 
|
 
|-
 
|rowspan="3"| 2: entity dead
 
| Player ID
 
 
  | VarInt
 
  | VarInt
  |  
+
  | Number of elements in the following array.
 
  |-
 
  |-
  | Entity ID
+
  | Modifiers
  | Int
+
  | Array of Modifier Data
|
+
  | See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
|-
 
| Message
 
  | {{Change|String|[[Chat]]}}
 
|
 
 
  |}
 
  |}
  
==== {{Change|Update Entity NBT|}} ====
+
Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
 
 
Was only used to update boss bars, replaced by [[#Boss Bar|Boss Bar]] accordingly.
 
 
 
==== {{Change||Boss Bar}} ====
 
 
 
This packet replaces Update Entity NBT packet which has been removed.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
|rowspan="15"| 0x49
+
  ! Id
|rowspan="15"| Play
+
  ! Key
|rowspan="15"| Client
+
  ! Default
|colspan="2"| UUID
+
  ! Min
| UUID
+
  ! Max
| Unique ID for this bar
+
  ! Label
|-
 
|colspan="2"| Action
 
| VarInt
 
| Determines the layout of the remaining packet
 
|-
 
  ! Action
 
  ! Field Name
 
  !  
 
  !  
 
|-
 
|rowspan="5"| 0: add
 
| Title
 
| [[Chat]]
 
|
 
|-
 
| Health
 
| Float
 
| From 0 to 1. Values greater than 1 do not crash the client, and start [https://i.johni0702.de/nA.png rendering part of a second health bar] at around 1.5
 
|-
 
| Color
 
| VarInt
 
| Color ID (see below)
 
|-
 
| Dividers
 
| VarInt
 
| Number of dividers rendered in the bar
 
|-
 
| Flags
 
| Unsigned Byte
 
| Bit mask: 0x1 should darken sky, 0x2: is dragon bar
 
|-
 
| 1: remove
 
| ''no fields''
 
| ''no fields''
 
| Removes this boss bar
 
|-
 
| 2: update health
 
| Health
 
| Float
 
| as above
 
|-
 
| 3: update title
 
| Title
 
| [[Chat]]
 
|
 
|-
 
|rowspan="2"| 4: update style
 
| Color
 
| VarInt
 
| Color ID (see below)
 
|-
 
| Dividers
 
| VarInt
 
| as above
 
|-
 
| 5: update flags
 
| Flags
 
| Unsigned Byte
 
| as above
 
|-
 
|}
 
 
 
{| class="wikitable"
 
  ! ID
 
  ! Color
 
 
  |-
 
  |-
 
  | 0
 
  | 0
  | Pink(ish)
+
  | generic.armor
 +
| 0.0
 +
| 0.0
 +
| 30.0
 +
| Armor.
 
  |-
 
  |-
 
  | 1
 
  | 1
  | Cyan
+
  | generic.armor_toughness
 +
| 0.0
 +
| 0.0
 +
| 20.0
 +
| Armor Toughness.
 
  |-
 
  |-
 
  | 2
 
  | 2
  | Red
+
  | generic.attack_damage
 +
| 2.0
 +
| 0.0
 +
| 2048.0
 +
| Attack Damage.
 
  |-
 
  |-
 
  | 3
 
  | 3
  | Lime
+
  | generic.attack_knockback
 +
| 0.0
 +
| 0.0
 +
| 5.0
 +
| Attack Knockback.
 
  |-
 
  |-
 
  | 4
 
  | 4
  | Yellow
+
  | generic.attack_speed
  |-
+
| 4.0
 +
| 0.0
 +
| 1024.0
 +
| Attack Speed.
 +
  |- {{added}}
 
  | 5
 
  | 5
  | Purple
+
  | generic.block_interaction_range
  |-
+
| 4.5
 +
| 0.0
 +
| 64.0
 +
| Block Interaction Range.
 +
  |- {{added}}
 
  | 6
 
  | 6
  | White
+
  | generic.entity_interaction_range
  |}
+
  | 3.0
 
+
| 0.0
==== {{Change||Set Cooldown}} ====
+
| 64.0
 
+
  | Entity Interaction Range.
Applies a cooldown period to an item type.
 
 
 
{| class="wikitable"
 
  ! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="2"| 0x4A
+
  | 7
  |rowspan="2"| Play
+
  | generic.flying_speed
  |rowspan="2"| Client
+
  | 0.4
  | Item ID
+
  | 0.0
  | VarInt
+
  | 1024.0
  | ID of the item to apply a cooldown to.
+
  | Flying Speed.
 
  |-
 
  |-
  | Cooldown Ticks
+
  | 8
  | VarInt
+
  | generic.follow_range
  | Number of ticks to apply a cooldown for.
+
  | 32.0
  |}
+
  | 0.0
 
+
| 2048.0
=== Serverbound ===
+
| Follow Range.
 
 
==== Use Entity ====
 
 
 
This packet is sent from the client to the server when the client attacks or right-clicks another entity (a player, minecart, etc).
 
 
 
A Notchian server only accepts this packet if the entity being attacked/used is visible without obstruction and within a 4-unit radius of the player's position.
 
 
 
Note that middle-click in creative mode is interpreted by the client and sent as a [[#Creative Inventory Action|Creative Inventory Action]] packet instead.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="6"| 0x02
+
  | 9
  |rowspan="6"| Play
+
  | horse.jump_strength
  |rowspan="6"| Server
+
  | 0.7
  | Target
+
  | 0.0
  | VarInt
+
  | 2.0
  |  
+
  | Jump Strength.
 
  |-
 
  |-
  | Type
+
  | 10
  | VarInt
+
  | generic.knockback_resistance
  | 0: interact, 1: attack, 2: interact at
+
  | 0.0
 +
| 0.0
 +
| 1.0
 +
| Knockback Resistance.
 
  |-
 
  |-
  | Target X
+
  | 11
  | Optional Float
+
  | generic.luck
  | Only if Type is interact at
+
  | 0.0
 +
| -1024.0
 +
| 1024.0
 +
| Luck.
 
  |-
 
  |-
  | Target Y
+
  | 12
  | Optional Float
+
  | generic.max_absorption
  | Only if Type is interact at
+
  | 0.0
 +
| 0.0
 +
| 2048.0
 +
| Max Absorption.
 
  |-
 
  |-
  | Target Z
+
  | 13
  | Optional Float
+
  | generic.max_health
  | Only if Type is interact at
+
  | 20.0
  |- style="background-color: #d9ead3;"
+
  | 1.0
  | Hand
+
  | 1024.0
| Optional VarInt
+
  | Max Health.
| Only if Type is interact or interact at; 0: main hand, 1: off hand
 
  |}
 
 
 
==== 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
+
  | 14
  |rowspan="3"| Play
+
| generic.movement_speed
  |rowspan="3"| Server
+
| 0.7
  | Status
+
| 0.0
  | Byte
+
| 1024.0
  | The action the player is taking against the block (see below)
+
  | Movement Speed.
 +
|- {{added}}
 +
  | 15
 +
| generic.scale
 +
| 1.0
 +
  | 0.0625
 +
  | 16.0
 +
  | Scale.
 
  |-
 
  |-
  | Location
+
  | 16
  | Position
+
  | zombie.spawn_reinforcements
  | Block position
+
  | 0.0
  |-
+
| 0.0
  | Face
+
| 1.0
  | Byte
+
| Spawn Reinforcements Chance.
  | The face being hit (see below)
+
  |- {{added}}
 +
| 17
 +
| generic.step_height
 +
| 0.6
 +
  | 0.0
 +
  | 10.0
 +
  | Step Height.
 
  |}
 
  |}
  
Status can be one of seven values:
+
''Modifier Data'' structure:
 
 
{| 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>
 
|- style="background-color: #d9ead3;"
 
| 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 sends 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, Location set to 0/0/0, and Face 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. Location is set to 0/0/0 like above, but the face field is set to 255.
 
 
 
Status code 6 is another special case. Used to swap or assign an item to the second hand. Location is set to 0/0/0 and Face is set to 0.
 
 
 
The Face field 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
 
|}
 
 
 
==== {{Change||Use Item}} ====
 
 
 
Sent when pressing the Use Item key (default: right click) with an item in hand.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| 0x08
 
|rowspan="1"| Play
 
|rowspan="1"| Server
 
| Hand
 
| VarInt
 
| Hand used for the animation
 
|}
 
 
 
==== Player Block Placement ====
 
  
 
{| class="wikitable"
 
{| class="wikitable"
 
  |-
 
  |-
! Packet ID
 
! State
 
! Bound To
 
 
  ! Field Name
 
  ! Field Name
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="7"| {{Change|0x08|0x09}}
+
  | UUID
|rowspan="7"| Play
+
  | UUID
|rowspan="7"| Server
+
  |
| Location
 
  | Position
 
  | Block position
 
 
  |-
 
  |-
  | Face
+
  | Amount
  | {{Change|Byte|VarInt}}
+
  | Double
| The face on which the block is placed (see above)
+
  | May be positive or negative.
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Held Item
 
| [[Slot Data|Slot]]
 
|
 
|- style="background-color: #d9ead3;"
 
| Hand
 
| VarInt
 
  | The hand from which the block is placed; 0: main hand, 1: off hand
 
 
  |-
 
  |-
  | Cursor Position X
+
  | Operation
 
  | Byte
 
  | Byte
  | The position of the crosshair on the block
+
  | See below.
|-
 
| Cursor Position Y
 
| Byte
 
|
 
|-
 
| Cursor Position Z
 
| Byte
 
|
 
 
  |}
 
  |}
  
In normal operation (i.e. placing a block), this packet is sent once, with the values set normally.
+
The operation controls how the base value of the modifier is changed.
 
 
This packet has a special case where X, Y, Z, and Direction are all -1. (Note that Y is unsigned so set to 255.) This special packet indicates that the currently held item for the player should have its state updated such as eating food, pulling back bows, using buckets, etc.
 
  
Special note on using buckets: When using buckets, the Notchian client might send two packets: first a normal and then a special case. The first normal packet is sent when you're looking at a block (e.g. the water you want to scoop up). This normal packet does not appear to do anything with a Notchian server. The second, special case packet appears to perform the action — based on current position/orientation and with a distance check — it appears that buckets can only be used within a radius of 6 units.
+
* 0: Add/subtract amount
 +
* 1: Add/subtract amount percent of the current value
 +
* 2: Multiply by amount percent
  
==== Held Item Change ====
+
All of the 0's are applied first, and then the 1's, and then the 2's.
  
Sent when the player changes the slot selection.
+
==== Entity Effect ====
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,836: Line 814:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="1"| {{Change|0x09|0x0A}}
+
  | rowspan="7"| 0x72
|rowspan="1"| Play
+
  | rowspan="7"| Play
|rowspan="1"| Server
+
  | rowspan="7"| Client
| Slot
 
| Short
 
| The slot which the player has selected (0–8)
 
|}
 
 
 
==== Animation ====
 
 
 
Sent when the player's arm swings
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| {{Change|0x0A|0x0B}}
 
|rowspan="1"| Play
 
|rowspan="1"| Server
 
|style="background-color: #d9ead3;"| Hand
 
|style="background-color: #d9ead3;"| VarInt
 
|style="background-color: #d9ead3;"| Hand used for the animation
 
|}
 
 
 
==== Entity Action ====
 
 
 
Sent at least when crouching, leaving a bed, or sprinting. To send action animation to client use 0x28. The client will send this with Action ID = 3 when “Leave Bed” is clicked.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| {{Change|0x0B|0x0C}}
 
  |rowspan="3"| Play
 
  |rowspan="3"| Server
 
 
  | Entity ID
 
  | Entity ID
 
  | VarInt
 
  | VarInt
  | Player ID
+
  |
 
  |-
 
  |-
  | Action ID
+
  | Effect ID
 
  | VarInt
 
  | VarInt
  | The ID of the action, see below
+
  | See {{Minecraft Wiki|Status effect#Effect list|this table}}.
 +
|-
 +
| Amplifier
 +
| Byte
 +
| Notchian client displays effect level as Amplifier + 1.
 
  |-
 
  |-
  | Jump Boost
+
  | Duration
 
  | VarInt
 
  | VarInt
  | Horse jump boost. Ranged from 0 -> 100.
+
  | Duration in ticks. (-1 for infinite)
|}
 
 
 
Action ID can be one of the following values:
 
 
 
{| class="wikitable"
 
! ID
 
! Action
 
|-
 
| 0
 
| Crouch
 
|-
 
| 1
 
| Uncrouch
 
|-
 
| 2
 
| Leave bed
 
|-
 
| 3
 
| Start sprinting
 
|-
 
| 4
 
| Stop sprinting
 
|-
 
| 5
 
| Jump with horse
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| 6
 
| Open inventory
 
|}
 
 
 
“Open inventory” is now sent via the [[#Client Status|Client Status]] packet.
 
 
 
==== Steer Vehicle ====
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| {{Change|0x0C|0x0D}}
 
|rowspan="3"| Play
 
|rowspan="3"| Server
 
| Sideways
 
| Float
 
| Positive to the left of the player
 
|-
 
| Forward
 
| Float
 
| Positive forward
 
 
  |-
 
  |-
 
  | Flags
 
  | Flags
| Unsigned Byte
 
| Bit mask. 0x1: jump, 0x2: unmount
 
|}
 
 
==== Close Window ====
 
 
This packet is sent by the client when closing a window.
 
 
Note, Notchian clients send a close window message with Window ID 0 to close their inventory even though there is never an Open Window message for the inventory.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
| {{Change|0x0D|0x0E}}
 
|rowspan="1"| Play
 
|rowspan="1"| Server
 
| Window ID
 
| Unsigned Byte
 
| This is the ID of the window that was closed. 0 for inventory.
 
|}
 
 
==== Click Window ====
 
 
This packet is sent by the player when it clicks on a slot in a window.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="6"| {{Change|0x0E|0x0F}}
 
|rowspan="6"| Play
 
|rowspan="6"| Server
 
| Window ID
 
| Unsigned Byte
 
| The ID of the window which was clicked. 0 for player inventory.
 
|-
 
| Slot
 
| Short
 
| The clicked slot number, see below
 
|-
 
| Button
 
| Byte
 
| The button used in the click, see below
 
|-
 
| Action Number
 
| Short
 
| A unique number for the action, implemented by Notchian as a counter, starting at 1. Used by the server to send back a [[Protocol#Confirm Transaction|Confirm Transaction]].
 
|-
 
| Mode
 
 
  | Byte
 
  | Byte
  | Inventory operation mode, see below
+
  | Bit field, see below.
|-
+
  |- {{removed}}
| Clicked item
+
  | Has Factor Data
| [[Slot Data|Slot]]
 
| The clicked slot. Has to be empty (item ID = -1) for drop mode.
 
|}
 
 
 
See [[Inventory#Windows]] for further information about how slots are indexed.
 
 
 
When right-clicking on a stack of items, half the stack will be picked up and half left in the slot. If the stack is an odd number, the half left in the slot will be smaller of the amounts.
 
 
 
The distinct type of click performed by the client is determined by the combination of the Mode and Button fields.
 
 
 
{| class="wikitable"
 
! Mode
 
! Button
 
! Slot
 
! Trigger
 
|-
 
!rowspan="2"| 0
 
| 0
 
| Normal
 
| Left mouse click
 
|-
 
| 1
 
| Normal
 
| Right mouse click
 
|-
 
!rowspan="2"| 1
 
| 0
 
| Normal
 
| Shift + left mouse click
 
|-
 
| 1
 
| Normal
 
| Shift + right mouse click ''(identical behavior)''
 
|-
 
!rowspan="5"| 2
 
| 0
 
| Normal
 
| Number key 1
 
|-
 
| 1
 
| Normal
 
| Number key 2
 
|-
 
| 2
 
| Normal
 
| Number key 3
 
|-
 
| ⋮
 
| ⋮
 
| ⋮
 
|-
 
| 8
 
| Normal
 
| Number key 9
 
|-
 
!rowspan="1"| 3
 
| 2
 
| Normal
 
| Middle click
 
|-
 
!rowspan="4"| 4
 
| 0
 
| Normal*
 
| Drop key (Q) (* Clicked item is different, see above)
 
|-
 
| 1
 
| Normal*
 
| Ctrl + Drop key (Ctrl-Q) ''(drops full stack)''
 
|-
 
| 0
 
| -999
 
| Left click outside inventory holding nothing ''(no-op)''
 
|-
 
| 1
 
| -999
 
| Right click outside inventory holding nothing ''(no-op)''
 
|-
 
!rowspan="6"| 5
 
| 0
 
| -999
 
| Starting left mouse drag ''(or middle mouse)''
 
|-
 
| 4
 
| -999
 
| Starting right mouse drag
 
|-
 
| 1
 
| Normal
 
| Add slot for left-mouse drag
 
|-
 
| 5
 
| Normal
 
| Add slot for right-mouse drag
 
|-
 
| 2
 
| -999
 
| Ending left mouse drag
 
|-
 
| 6
 
| -999
 
| Ending right mouse drag
 
|-
 
! 6
 
| 0
 
| Normal
 
| Double click
 
|}
 
 
 
Starting from version 1.5, “painting mode” is available for use in inventory windows. It is done by picking up stack of something (more than 1 item), then holding mouse button (left, right or middle) and dragging held stack over empty (or same type in case of right button) slots. In that case client sends the following to server after mouse button release (omitting first pickup packet which is sent as usual):
 
 
 
# packet with mode 5, slot -999, button (0 for left | 4 for right);
 
# packet for every slot painted on, mode is still 5, button (1 | 5);
 
# packet with mode 5, slot -999, button (2 | 6);
 
 
 
If any of the painting packets other than the “progress” ones are sent out of order (for example, a start, some slots, then another start; or a left-click in the middle) the painting status will be reset.
 
 
 
The server will send back a [[#Confirm Transaction|Confirm Transaction]]<!-- note that the anchor should be changed to #Confirm Transaction 2 when merging with [[Protocol]] --> packet. If the click was not accepted, the client must reflect that packet before sending more [[#Click Window|Click Window]] packets, otherwise the server will reject them silently. The Notchian server also sends a [[Protocol#Window Items|Window Items]] packet for the open window and [[Protocol#Set Slot|Set Slot]] packets for the clicked and cursor slot, but only when the click was not accepted, probably to resynchronize client and server.
 
 
 
==== Confirm Transaction ====
 
 
 
<SpaceManiac> noooo idea why the serverbound confirm transaction packet exists
 
<SpaceManiac> I think it's sent as a response to the clientbound confirm transaction in some situations, but it's fuzzy
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
  |-
 
|rowspan="3"| {{Change|0x0F|0x10}}
 
  |rowspan="3"| Play
 
|rowspan="3"| Server
 
| Window ID
 
| Byte
 
| The ID of the window that the action occurred in
 
|-
 
| Action Number
 
| Short
 
| Every action that is to be accepted has a unique number. This field corresponds to that number.
 
|-
 
| Accepted
 
 
  | Boolean
 
  | Boolean
  | Whether the action was accepted
+
  | Used in DARKNESS effect
 +
|- {{removed}}
 +
| Factor Codec
 +
| NBT Tag
 +
| See below
 
  |}
 
  |}
  
==== Creative Inventory Action ====
+
{{Need Info|What exact effect does the blend bit flag have on the client? What happens if it is used on effects besides DARKNESS?}}
  
While the user is in the standard inventory (i.e., not a crafting bench) in Creative mode, the player will send this packet.
+
Within flags:
  
Clicking in the creative inventory menu is quite different from non-creative inventory management. Picking up an item with the mouse actually deletes the item from the server, and placing an item into a slot or dropping it out of the inventory actually tells the server to create the item from scratch. (This can be verified by clicking an item that you don't mind deleting, then severing the connection to the server; the item will be nowhere to be found when you log back in.) As a result of this implementation strategy, the "Destroy Item" slot is just a client-side implementation detail that means "I don't intend to recreate this item.". Additionally, the long listings of items (by category, etc.) are a client-side interface for choosing which item to create. Picking up an item from such listings sends no packets to the server; only when you put it somewhere does it tell the server to create the item in that location.
+
* 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.}}
  
This action can be described as “set inventory slot”. Picking up an item sets the slot to item ID -1. Placing an item into an inventory slot sets the slot to the specified item. Dropping an item (by clicking outside the window) effectively sets slot -1 to the specified item, which causes the server to spawn the item entity, etc.. All other inventory slots are numbered the same as the non-creative inventory (including slots for the 2×2 crafting menu, even though they aren't visible in the vanilla client).
+
{{change|Factor Data|}}
 
+
{| class="wikitable" {{removed}}
{| class="wikitable"
+
  !Name
  ! Packet ID
+
  !Type
! State
+
  !style="width: 250px;" colspan="2"| Notes
! Bound To
 
! Field Name
 
  ! Field Type
 
  ! Notes
 
 
  |-
 
  |-
  |rowspan="2"| {{Change|0x10|0x11}}
+
  | padding_duration
|rowspan="2"| Play
+
  | TAG_INT
|rowspan="2"| Server
+
  |
| Slot
 
  | Short
 
  | Inventory slot
 
 
  |-
 
  |-
  | Clicked Item
+
  | factor_start
| [[Slot Data|Slot]]
+
  | TAG_FLOAT
  |  
+
  |
  |}
 
 
 
==== Enchant Item ====
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="2"| {{Change|0x11|0x12}}
+
  | factor_target
|rowspan="2"| Play
+
  | TAG_FLOAT
  |rowspan="2"| Server
+
  |
  | Window ID
 
| Byte
 
| The ID of the enchantment table window sent by [[Protocol#Open Window|Open Window]]
 
 
  |-
 
  |-
  | Enchantment
+
  | factor_current
  | Byte
+
  | TAG_FLOAT
  | The position of the enchantment on the enchantment table window, starting with 0 as the topmost one
+
  |
|}
 
 
 
==== Update Sign ====
 
 
 
This message is sent from the client to the server when the “Done” button is pushed after placing a sign.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="5"| {{Change|0x12|0x13}}
 
|rowspan="5"| Play
 
|rowspan="5"| Server
 
| Location
 
| Position
 
| Block Coordinates
 
 
  |-
 
  |-
  | Line 1
+
  | effect_changed_timestamp
  | {{Change|[[Chat]]|String}}
+
  | TAG_INT
| First line of text in the sign
 
 
  |-
 
  |-
  | Line 2
+
  | factor_previous_frame
  | {{Change|[[Chat]]|String}}
+
  | TAG_FLOAT
| Second line of text in the sign
 
 
  |-
 
  |-
  | Line 3
+
  | had_effect_last_tick
  | {{Change|[[Chat]]|String}}
+
  | TAG_BOOLEAN
| Third line of text in the sign
 
|-
 
| Line 4
 
| {{Change|[[Chat]]|String}}
 
| Fourth line of text in the sign
 
 
  |}
 
  |}
  
==== Player Abilities ====
+
=== Serverbound ===
 
 
The latter 2 bytes are used to indicate the walking and flying speeds respectively, while the first byte is used to determine the value of 4 booleans.
 
 
 
The vanilla client sends this packet when the player starts/stops flying with the second parameter changed accordingly. All other parameters are ignored by the vanilla server.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| {{Change|0x13|0x14}}
 
|rowspan="3"| Play
 
|rowspan="3"| Server
 
| Flags
 
| Byte
 
| Bit mask. 0x08: damage disabled (god mode), 0x04: can fly, 0x02: is flying, 0x01: is Creative
 
|-
 
| Flying Speed
 
| Float
 
|
 
|-
 
| Walking Speed
 
| Float
 
|
 
|}
 
 
 
==== Tab-Complete ====
 
 
 
Sent when the user presses ''tab'' while writing text.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| {{Change|0x14|0x15}}
 
|rowspan="3"| Play
 
|rowspan="3"| Server
 
| Text
 
| String
 
| All text behind the cursor
 
|-
 
| Has Position
 
| Boolean
 
|
 
|-
 
| Looked At Block
 
| Optional Position
 
| The position of the block being looked at. Only sent if Has Position is true
 
|}
 
 
 
==== Client Settings ====
 
 
 
Sent when the player connects, or when settings are changed.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="6"| {{Change|0x15|0x16}}
 
|rowspan="6"| Play
 
|rowspan="6"| Server
 
| Locale
 
| String
 
| e.g. en_GB
 
|-
 
| View Distance
 
| Byte
 
| Client-side render distance, in chunks
 
|-
 
| Chat Mode
 
| {{Change|Byte|VarInt}}
 
| 0: enabled, 1: commands only, 2: hidden
 
|-
 
| Chat Colors
 
| Boolean
 
| “Colors” multiplayer setting
 
|-
 
| Displayed Skin Parts
 
| Unsigned Byte
 
| Skin parts, see note below
 
|- style="background-color: #d9ead3;"
 
| Main Hand
 
| VarInt
 
| 0: Left, 1: Right
 
|}
 
 
 
''Displayed Skin Parts'' flags:
 
 
 
* Bit 0 (0x01): Cape enabled
 
* Bit 1 (0x02): Jacket enabled
 
* Bit 2 (0x04): Left Sleeve enabled
 
* Bit 3 (0x08): Right Sleeve enabled
 
* Bit 4 (0x10): Left Pants Leg enabled
 
* Bit 5 (0x20): Right Pants Leg enabled
 
* Bit 6 (0x40): Hat enabled
 
 
 
The most significant bit (bit 7, 0x80) appears to be unused.
 
 
 
==== Client Status ====
 
 
 
Sent when the client is ready to complete login and when the client is ready to respawn after death.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| {{Change|0x16|0x17}}
 
|rowspan="1"| Play
 
|rowspan="1"| Server
 
| Action ID
 
| VarInt
 
| See below
 
|}
 
  
''Action ID'' values:
+
==== Cookie Response (play) ====
  
{| class="wikitable"
+
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.
|-
 
! Action ID
 
! Action
 
|-
 
| 0
 
| Perform respawn
 
|-
 
| 1
 
| Request stats
 
|-
 
| 2
 
| {{Change|''Taking Inventory'' achievement|Open Inventory}}
 
|}
 
  
==== Plugin Message ====
+
{| class="wikitable" {{added}}
 
 
Mods and plugins can use this to send their data. Minecraft itself uses a number of [[plugin channel]]s. These internal channels are prefixed with <code>MC|</code>.
 
 
 
More documentation on this: [http://dinnerbone.com/blog/2012/01/13/minecraft-plugin-channels-messaging/ http://dinnerbone.com/blog/2012/01/13/minecraft-plugin-channels-messaging/]
 
 
 
Note that the data length is known from the packet length, so there is no need for a length member being sent.
 
 
 
{| 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="2"| {{Change|0x17|0x18}}
+
  | rowspan="3"| 0x6A
  |rowspan="2"| Play
+
  | rowspan="3"| Play
  |rowspan="2"| Server
+
  | rowspan="3"| Server
  | Channel
+
  | colspan="2"| Key
  | String
+
  | colspan="2"| Identifier
  | Name of the [[plugin channel]] used to send the data
+
  | The identifier of the cookie.
 
  |-
 
  |-
  | Data
+
  | colspan="2"| Has Payload
  | Byte Array
+
  | colspan="2"| Boolean
  | Any data, depending on the channel. <code><nowiki>MC|</nowiki></code> channels are documented [[plugin channel|here]].
+
  | The payload is only present if the cookie exists on the client.
|}
 
 
 
==== Spectate ====
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="1"| {{Change|0x18|0x19}}
+
  | colspan="2"| Payload
  |rowspan="1"| Play
+
  | colspan="2"| Optional ByteArray(5120)
|rowspan="1"| Server
+
  | The data of the cookie, if any.
| Target Player
 
| UUID
 
  |  
 
 
  |}
 
  |}
  
==== Resource Pack Status ====
+
[[Category:Minecraft Modern]]
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| {{Change|0x19|0x1A}}
 
|rowspan="2"| Play
 
|rowspan="2"| Server
 
| Hash
 
| String
 
| The hash sent in the [[Protocol#Resource Pack Send|Resource Pack Send]] packet.
 
|-
 
| Result
 
| VarInt
 
| 0: successfully loaded, 1: declined, 2: failed download, 3: accepted
 
|}
 
 
 
== 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 05:25, 26 February 2024

This page documents the changes from the last stable Minecraft release (currently 1.20.4, protocol 765) to the current pre-release (currently 24w03b, protocol Snapshot 172). 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 so far.

Packets

ID Packet name Documentation
Handshake serverbound
0x00 Handshake Current Pre
Login clientbound
0x05 Cookie Request (login) Pre
Login serverbound
0x04 Cookie Response (login) Pre
Configuration clientbound
0x00 Cookie Request (configuration) Pre
0x00 0x01 Clientbound Plugin Message (configuration) Current (unchanged)
0x01 0x02 Disconnect (configuration) Current (unchanged)
0x02 0x03 Finish Configuration Current (unchanged)
0x03 0x04 Clientbound Keep Alive (configuration) Current (unchanged)
0x04 0x05 Ping (configuration) Current (unchanged)
0x05 0x06 Registry Data Current (unchanged)
0x06 0x07 Remove Resource Pack (configuration) Current (unchanged)
0x07 0x08 Add Resource Pack (configuration) Current (unchanged)
0x09 Store Cookie (configuration) Pre
0x0A Transfer (configuration) Pre
0x08 0x0B Feature Flags Current (unchanged)
0x09 0x0C Update Tags (configuration) Current (unchanged)
Configuration serverbound
0x01 Cookie Response (configuration) Pre
0x01 0x02 Serverbound Plugin Message (configuration) Current (unchanged)
0x02 0x03 Finish Configuration Current (unchanged)
0x03 0x04 Serverbound Keep Alive (configuration) Current (unchanged)
0x04 0x05 Pong (configuration) Current (unchanged)
0x05 0x06 Resource Pack Response (configuration) Current (unchanged)
Play clientbound
0x16 Cookie Request (Play) Pre
0x16 0x17 Set Cooldown Current (unchanged)
0x17 0x18 Chat Suggestions Current (unchanged)
0x18 0x19 Clientbound Plugin Message (play) Current (unchanged)
0x19 0x1A Damage Event Current (unchanged)
0x1A 0x1B Delete Message Current (unchanged)
0x1B 0x1C Disconnect (play) Current (unchanged)
0x1C 0x1D Disguised Chat Message Current (unchanged)
0x1D 0x1E Entity Event Current (unchanged)
0x1E 0x1F Explosion Current (unchanged)
0x1F 0x20 Unload Chunk Current (unchanged)
0x20 0x21 Game Event Current (unchanged)
0x21 0x22 Open Horse Screen Current (unchanged)
0x22 0x23 Hurt Animation Current (unchanged)
0x23 0x24 Initialize World Border Current (unchanged)
0x24 0x25 Clientbound Keep Alive (play) Current (unchanged)
0x25 0x26 Chunk Data and Update Light Current (unchanged)
0x26 0x27 World Event Current (unchanged)
0x27 0x28 Particle Current (unchanged)
0x28 0x29 Update Light Current (unchanged)
0x29 0x2A Login (play) Current (unchanged)
0x2A 0x2B Map Data Current (unchanged)
0x2B 0x2C Merchant Offers Current (unchanged)
0x2C 0x2D Update Entity Position Current (unchanged)
0x2D 0x2E Update Entity Position and Rotation Current (unchanged)
0x2E 0x2F Update Entity Rotation Current (unchanged)
0x2F 0x30 Move Vehicle Current (unchanged)
0x30 0x31 Open Book Current (unchanged)
0x31 0x32 Open Screen Current (unchanged)
0x32 0x33 Open Sign Editor Current (unchanged)
0x33 0x34 Ping (play) Current (unchanged)
0x34 0x35 Ping Response (play) Current (unchanged)
0x35 0x36 Place Ghost Recipe Current (unchanged)
0x36 0x37 Player Abilities Current (unchanged)
0x37 0x38 Player Chat Message Current (unchanged)
0x38 0x39 End Combat Current (unchanged)
0x39 0x3A Enter Combat Current (unchanged)
0x3A 0x3B Combat Death Current (unchanged)
0x3B 0x3C Player Info Remove Current (unchanged)
0x3C 0x3D Player Info Update Current (unchanged)
0x3D 0x3E Look At Current (unchanged)
0x3E 0x3F Synchronize Player Position Current (unchanged)
0x3F 0x40 Update Recipe Book Current (unchanged)
0x40 0x41 Remove Entities Current (unchanged)
0x41 0x42 Remove Entity Effect Current (unchanged)
0x42 0x43 Reset Score Current (unchanged)
0x43 0x44 Remove Resource Pack (play) Current (unchanged)
0x44 0x45 Add Resource Pack (play) Current (unchanged)
0x45 0x46 Respawn Current (unchanged)
0x46 0x47 Set Head Rotation Current (unchanged)
0x47 0x48 Update Section Blocks Current (unchanged)
0x48 0x49 Select Advancements Tab Current (unchanged)
0x49 0x4A Server Data Current (unchanged)
0x4A 0x4B Set Action Bar Text Current (unchanged)
0x4B 0x4C Set Border Center Current (unchanged)
0x4C 0x4D Set Border Lerp Size Current (unchanged)
0x4D 0x4E Set Border Size Current (unchanged)
0x4E 0x4F Set Border Warning Delay Current (unchanged)
0x4F 0x50 Set Border Warning Distance Current (unchanged)
0x50 0x51 Set Camera Current (unchanged)
0x51 0x52 Set Held Item Current (unchanged)
0x52 0x53 Set Center Chunk Current (unchanged)
0x53 0x54 Set Render Distance Current (unchanged)
0x54 0x55 Set Default Spawn Position Current (unchanged)
0x55 0x56 Display Objective Current (unchanged)
0x56 0x57 Set Entity Metadata Current (unchanged)
0x57 0x58 Link Entities Current (unchanged)
0x58 0x59 Set Entity Velocity Current (unchanged)
0x59 0x5A Set Equipment Current (unchanged)
0x5A 0x5B Set Experience Current (unchanged)
0x5B 0x5C Set Health Current (unchanged)
0x5C 0x5D Update Objectives Current (unchanged)
0x5D 0x5E Set Passengers Current (unchanged)
0x5E 0x5F Update Teams Current (unchanged)
0x5F 0x60 Update Score Current (unchanged)
0x60 0x61 Set Simulation Distance Current (unchanged)
0x61 0x62 Set Subtitle Text Current (unchanged)
0x62 0x63 Update Time Current (unchanged)
0x63 0x64 Set Title Text Current (unchanged)
0x64 0x65 Set Title Animation Times Current (unchanged)
0x65 0x66 Entity Sound Effect Current (unchanged)
0x66 0x67 Sound Effect Current (unchanged)
0x67 0x68 Start Configuration Current (unchanged)
0x68 0x69 Stop Sound Current (unchanged)
0x6A Store Cookie (Play) Pre
0x69 0x6B System Chat Message Current (unchanged)
0x6A 0x6C Set Tab List Header And Footer Current (unchanged)
0x6B 0x6D Tag Query Response Current (unchanged)
0x6C 0x6E Pickup Item Current (unchanged)
0x6D 0x6F Teleport Entity Current (unchanged)
0x6E 0x70 Set Ticking State Current (unchanged)
0x6F 0x71 Step Tick Current (unchanged)
0x72 Transfer (Play) Pre
0x70 0x73 Update Advancements Current (unchanged)
0x71 0x74 Update Attributes Current Pre
0x72 0x75 Entity Effect Current Pre
0x73 0x76 Update Recipes Current (unchanged)
0x74 0x77 Update Tags (play) Current (unchanged)
Play serverbound
0x10 Cookie Response (play) Pre
0x10 0x11 Serverbound Plugin Message (play) Current (unchanged)
0x11 0x12 Edit Book Current (unchanged)
0x12 0x13 Query Entity Tag Current (unchanged)
0x13 0x14 Interact Current (unchanged)
0x14 0x15 Jigsaw Generate Current (unchanged)
0x15 0x16 Serverbound Keep Alive (play) Current (unchanged)
0x16 0x17 Lock Difficulty Current (unchanged)
0x17 0x18 Set Player Position Current (unchanged)
0x18 0x19 Set Player Position and Rotation Current (unchanged)
0x19 0x1A Set Player Rotation Current (unchanged)
0x1A 0x1B Set Player On Ground Current (unchanged)
0x1B 0x1C Move Vehicle Current (unchanged)
0x1C 0x1D Paddle Boat Current (unchanged)
0x1D 0x1E Pick Item Current (unchanged)
0x1E 0x1F Ping Request (play) Current (unchanged)
0x1F 0x20 Place Recipe Current (unchanged)
0x20 0x21 Player Abilities Current (unchanged)
0x21 0x22 Player Action Current (unchanged)
0x22 0x23 Player Command Current (unchanged)
0x23 0x24 Player Input Current (unchanged)
0x24 0x25 Pong (play) Current (unchanged)
0x25 0x26 Change Recipe Book Settings Current (unchanged)
0x26 0x27 Set Seen Recipe Current (unchanged)
0x27 0x28 Rename Item Current (unchanged)
0x28 0x29 Resource Pack Response (play) Current (unchanged)
0x29 0x2A Seen Advancements Current (unchanged)
0x2A 0x2B Select Trade Current (unchanged)
0x2B 0x2C Set Beacon Effect Current (unchanged)
0x2C 0x2D Set Held Item Current (unchanged)
0x2D 0x2E Program Command Block Current (unchanged)
0x2E 0x2F Program Command Block Minecart Current (unchanged)
0x2F 0x30 Set Creative Mode Slot Current (unchanged)
0x30 0x31 Program Jigsaw Block Current (unchanged)
0x31 0x32 Program Structure Block Current (unchanged)
0x32 0x33 Update Sign Current (unchanged)
0x33 0x34 Swing Arm Current (unchanged)
0x34 0x35 Teleport To Entity Current (unchanged)
0x35 0x36 Use Item On Current (unchanged)
0x36 0x37 Use Item Current (unchanged)

New/modified data types

No changes so far.

Entity Metadata

Type Name Value Notes
0 Byte Byte
1 VarInt VarInt
2 VarLong VarLong
3 Float Float
4 String String
5 Text Component Text Component
6 Optional Text Component (Boolean, Optional Text Component) Text Component is present if the Boolean is set to true.
7 Slot Slot
8 Boolean Boolean
9 Rotations (Float, Float, Float) rotation on x, rotation on y, rotation on z
10 Position Position
11 Optional Position (Boolean, Optional Position) Position is present if the Boolean is set to true.
12 Direction VarInt Enum Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5
13 Optional UUID (Boolean, Optional UUID) UUID is present if the Boolean is set to true.
14 Block State VarInt An ID in the block state registry.
15 Optional Block State VarInt 0 for absent (air is unrepresentable); otherwise, an ID in the block state registry.
16 NBT NBT
17 Particle (VarInt, Varies) particle type (an ID in the minecraft:particle_type registry), particle data (See Particles.)
18 Villager Data (VarInt, VarInt, VarInt) villager type, villager profession, level (See below.)
19 Optional VarInt VarInt 0 for absent; 1 + actual value otherwise. Used for entity IDs.
20 Pose VarInt Enum STANDING = 0, FALL_FLYING = 1, SLEEPING = 2, SWIMMING = 3, SPIN_ATTACK = 4, SNEAKING = 5, LONG_JUMPING = 6, DYING = 7, CROAKING = 8, USING_TONGUE = 9, SITTING = 10, ROARING = 11, SNIFFING = 12, EMERGING = 13, DIGGING = 14, SLIDING = 15, SHOOTING = 16, INHALING = 17
21 Cat Variant VarInt An ID in the minecraft:cat_variant registry.
22 Frog Variant VarInt An ID in the minecraft:frog_variant registry.
23 Optional Global Position (Boolean, Optional Identifier, Optional Position) dimension identifier, position; only if the Boolean is set to true.
24 Painting Variant VarInt An ID in the minecraft:painting_variant registry.
25 Sniffer State VarInt Enum IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
26 Armadillo State VarInt Enum IDLE = 0, ROLLING = 1, SCARED = 2
26 27 Vector3 (Float, Float, Float) x, y, z
27 28 Quaternion (Float, Float, Float, Float) x, y, z, w

Armadillo

Extends Animal.

Index Type Meaning Default
17 Armadillo State (26) Armadillo State IDLE

Block Actions

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.

Packet ID State Bound To Field Name Field Type Notes
0x00 Handshaking Server Protocol Version VarInt See protocol version numbers (currently 765 in Minecraft 1.20.4).
Server Address 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 Unsigned Short Default is 25565. The Notchian server does not use this information.
Next State VarInt Enum 1 for Status, 2 for Login, 3 for Transfer.

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

Cookie Request (login)

Requests a cookie that was previously stored.

Packet ID State Bound To Field Name Field Type Notes
0x05 Login Client Key Identifier The identifier of the cookie.

Serverbound

Cookie Response (login)

Response to a Cookie Request (login) from the server. The Notchian server only accepts responses of up to 5 kiB in size.

Packet ID State Bound To Field Name Field Type Notes
0x04 Login Server Key Identifier The identifier of the cookie.
Has Payload Boolean The payload is only present if the cookie exists on the client.
Payload Optional ByteArray(5120) The data of the cookie, if any.

Configuration

Clientbound

Cookie Request (configuration)

Requests a cookie that was previously stored.

Packet ID State Bound To Field Name Field Type Notes
0x00 Configuration Client Key Identifier The identifier of the cookie.

Store Cookie (configuration)

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.

Packet ID State Bound To Field Name Field Type Notes
0x09 Configuration Client Key Identifier The identifier of the cookie.
Payload ByteArray(5120) The data of the cookie.

Transfer (configuration)

Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.

Packet ID State Bound To Field Name Field Type Notes
0x0A Configuration Client Host String The hostname of IP of the server.
Port VarInt The port of the server.

Serverbound

Cookie Response (configuration)

Response to a Cookie Request (configuration) from the server. The Notchian server only accepts responses of up to 5 kiB in size.

Packet ID State Bound To Field Name Field Type Notes
0x01 Configuration Server Key Identifier The identifier of the cookie.
Has Payload Boolean The payload is only present if the cookie exists on the client.
Payload Optional ByteArray(5120) The data of the cookie, if any.

Play

Clientbound

Cookie Request (play)

Requests a cookie that was previously stored.

Packet ID State Bound To Field Name Field Type Notes
0x16 Play Client Key Identifier The identifier of the cookie.

Store Cookie (play)

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.

Packet ID State Bound To Field Name Field Type Notes
0x6A Play Client Key Identifier The identifier of the cookie.
Payload ByteArray(5120) The data of the cookie.

Transfer (play)

Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.

Packet ID State Bound To Field Name Field Type Notes
0x72 Play Client Host String The hostname of IP of the server.
Port VarInt The port of the server.

Update Attributes

Sets attributes on the given entity.

Packet ID State Bound To Field Name Field Type Notes
0x71 Play Client Entity ID VarInt
Number Of Properties VarInt Number of elements in the following array.
Property Key Id Array Identifier VarInt Enum See below.
Value Double See below.
Number Of Modifiers VarInt Number of elements in the following array.
Modifiers Array of Modifier Data See Attribute#Modifiers. Modifier Data defined below.

Known Key values (see also Attribute#Modifiers):

Id Key Default Min Max Label
0 generic.armor 0.0 0.0 30.0 Armor.
1 generic.armor_toughness 0.0 0.0 20.0 Armor Toughness.
2 generic.attack_damage 2.0 0.0 2048.0 Attack Damage.
3 generic.attack_knockback 0.0 0.0 5.0 Attack Knockback.
4 generic.attack_speed 4.0 0.0 1024.0 Attack Speed.
5 generic.block_interaction_range 4.5 0.0 64.0 Block Interaction Range.
6 generic.entity_interaction_range 3.0 0.0 64.0 Entity Interaction Range.
7 generic.flying_speed 0.4 0.0 1024.0 Flying Speed.
8 generic.follow_range 32.0 0.0 2048.0 Follow Range.
9 horse.jump_strength 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.
15 generic.scale 1.0 0.0625 16.0 Scale.
16 zombie.spawn_reinforcements 0.0 0.0 1.0 Spawn Reinforcements Chance.
17 generic.step_height 0.6 0.0 10.0 Step Height.

Modifier Data structure:

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

Packet ID State Bound To Field Name Field Type Notes
0x72 Play Client Entity ID VarInt
Effect ID VarInt See 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.
Has Factor Data Boolean Used in DARKNESS effect
Factor Codec NBT Tag See below
Huh.png The following information needs to be added to this page:
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 "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.
  • 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.

Factor Data

Name Type 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

Cookie Response (play)

Response to a Cookie Request (play) from the server. The Notchian server only accepts responses of up to 5 kiB in size.

Packet ID State Bound To Field Name Field Type Notes
0x6A Play Server Key Identifier The identifier of the cookie.
Has Payload Boolean The payload is only present if the cookie exists on the client.
Payload Optional ByteArray(5120) The data of the cookie, if any.