Pre-release protocol
This page documents the changes from the last stable Minecraft release (currently 1.15.2, protocol 578) to the current pre-release (currently 20w07a, protocol 702). 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 | |||
|---|---|---|---|---|---|
| Handshaking serverbound | |||||
| 0x00 | Handshake | added | Current }} | removed | unchanged | (unchanged) | Pre }} }} |
New/modified data types
No changes so far.
Entity Metadata
{{#vardefine:meta_prerelease|1}}No changes so far.
Hoglin
{{#if:Pig||Must specify the current entity ID for Template:Metadata inherit}} {{#vardefine:meta_current_entity|Pig}}
{{#if:{{#var:meta_prerelease}}|
{{#if:Animal
| {{#if:
| Extends {{#if:[[{{#varexists:meta_Animal|Entity metadata}}#Animal|Animal]]|[[{{#varexists:meta_Animal|Entity metadata}}#Animal|Animal]]}}{{#if:[[{{#varexists:meta_{{{pre_inherits}}}|Entity metadata}}#{{{pre_inherits}}}|{{{pre_inherits}}}]]|{{#if:[[{{#varexists:meta_Animal|Entity metadata}}#Animal|Animal]]| }}[[{{#varexists:meta_{{{pre_inherits}}}|Entity metadata}}#{{{pre_inherits}}}|{{{pre_inherits}}}]]}}.
| Extends [[{{#varexists:meta_Animal|Entity metadata}}#Animal|Animal]].
}}{{#if:16
| {{#vardefine:meta_Pig|16}}
{{#if:{{#varexists:meta_Animal}}|start_at in use when inherited entity Animal exists}}
| {{#vardefine:meta_Pig|{{#var:meta_Animal|0}}}}
{{#if:{{#varexists:meta_Animal}}||Inherited entity Animal does not exist}}
}}{{#if:16
| {{#vardefine:meta_pre_Pig|16}}
{{#if:{{#varexists:meta_Animal}}|start_at in use when inherited entity Animal exists}}
| {{#vardefine:meta_pre_Pig|{{#var:meta_pre_Animal|0}}}}
{{#if:{{#varexists:meta_Animal}}||Inherited entity Animal does not exist}}
}}
| The base class.
{{#vardefine:meta_Pig|16}}
{{#vardefine:meta_pre_Pig|16}}
}}
|
{{#if:Animal
| Extends Animal.
{{#if:16
| {{#vardefine:meta_Pig|16}}
{{#if:{{#varexists:meta_Animal}}|start_at in use when inherited entity Animal exists}}
| {{#vardefine:meta_Pig|{{#var:meta_Animal|0}}}}
{{#if:{{#varexists:meta_Animal}}||Inherited entity Animal does not exist}}
}}
| The base class.
{{#vardefine:meta_Pig|16}}
}}
}}
No additional metadata.
Piglin
{{#if:Pig||Must specify the current entity ID for Template:Metadata inherit}} {{#vardefine:meta_current_entity|Pig}}
{{#if:{{#var:meta_prerelease}}|
{{#if:Monster
| {{#if:
| Extends {{#if:[[{{#varexists:meta_Monster|Entity metadata}}#Monster|Monster]]|[[{{#varexists:meta_Monster|Entity metadata}}#Monster|Monster]]}}{{#if:[[{{#varexists:meta_{{{pre_inherits}}}|Entity metadata}}#{{{pre_inherits}}}|{{{pre_inherits}}}]]|{{#if:[[{{#varexists:meta_Monster|Entity metadata}}#Monster|Monster]]| }}[[{{#varexists:meta_{{{pre_inherits}}}|Entity metadata}}#{{{pre_inherits}}}|{{{pre_inherits}}}]]}}.
| Extends [[{{#varexists:meta_Monster|Entity metadata}}#Monster|Monster]].
}}{{#if:15
| {{#vardefine:meta_Pig|15}}
{{#if:{{#varexists:meta_Monster}}|start_at in use when inherited entity Monster exists}}
| {{#vardefine:meta_Pig|{{#var:meta_Monster|0}}}}
{{#if:{{#varexists:meta_Monster}}||Inherited entity Monster does not exist}}
}}{{#if:15
| {{#vardefine:meta_pre_Pig|15}}
{{#if:{{#varexists:meta_Monster}}|start_at in use when inherited entity Monster exists}}
| {{#vardefine:meta_pre_Pig|{{#var:meta_pre_Monster|0}}}}
{{#if:{{#varexists:meta_Monster}}||Inherited entity Monster does not exist}}
}}
| The base class.
{{#vardefine:meta_Pig|15}}
{{#vardefine:meta_pre_Pig|15}}
}}
|
{{#if:Monster
| Extends Monster.
{{#if:15
| {{#vardefine:meta_Pig|15}}
{{#if:{{#varexists:meta_Monster}}|start_at in use when inherited entity Monster exists}}
| {{#vardefine:meta_Pig|{{#var:meta_Monster|0}}}}
{{#if:{{#varexists:meta_Monster}}||Inherited entity Monster does not exist}}
}}
| The base class.
{{#vardefine:meta_Pig|15}}
}}
}}
| Index | Type | Meaning | Default | ||||||
|---|---|---|---|---|---|---|---|---|---|
{{#vardefine:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
{{#vardefine:pre_meta|{{#var:meta_pre_{{#var:meta_current_entity}}}}}}
{{#switch:
|
added =
{{#if:|
|
removed =
{{#if:{{#var:cur_meta}}|
|
=
{{#ifeq: {{#var:cur_meta}}|{{#var:pre_meta}} | {{#var:cur_meta}} | {{#if:{{#var:cur_meta}}|
|
#default =
Invalid parameter to Template:Metadata id }} |
{{#vardefineecho:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
{{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
{{#ifeq: |||Template:Metadata id must be used as
}} |
Boolean | Is baby | false | |
{{#vardefine:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
{{#vardefine:pre_meta|{{#var:meta_pre_{{#var:meta_current_entity}}}}}}
{{#switch:
|
added =
{{#if:|
|
removed =
{{#if:{{#var:cur_meta}}|
|
=
{{#ifeq: {{#var:cur_meta}}|{{#var:pre_meta}} | {{#var:cur_meta}} | {{#if:{{#var:cur_meta}}|
|
#default =
Invalid parameter to Template:Metadata id }} |
{{#vardefineecho:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}}
{{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}
{{#ifeq: |||Template:Metadata id must be used as
}} |
Boolean | Is charging crossbow | false | |
Block Actions
No changes so far.
Inventories
No changes so far.
Plugin Channels
No changes so far.
Play
Clientbound
No changes so far.
Serverbound
No changes so far.
Handshaking
Clientbound
There are no clientbound packets in the Handshaking state, since the protocol immediately switches to a different state after the client sends the first packet.
Serverbound
Handshake
This causes the server to switch into the target state.
| Packet ID | State | Bound To | Field Name | Field Type | Notes |
|---|---|---|---|---|---|
| 0x00 | Handshaking | Server | Protocol Version | VarInt | See protocol version numbers (currently {{#if:578| |
| Server Address | String | Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect. The Notchian server does not use this information. Note that SRV records are a complete redirect, e.g. if _minecraft._tcp.example.com points to mc.example.org, users connecting to example.com will provide mc.example.org as server address in addition to connecting to it. | |||
| Server Port | Unsigned Short | Default is 25565. The Notchian server does not use this information. | |||
| Next State | VarInt Enum | 1 for status, 2 for login |
Status
Clientbound
No changes so far.
Serverbound
No changes so far.
Login
Clientbound
No changes so far.
Serverbound
No changes so far.