Pre-release protocol

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Revision as of 11:06, 11 March 2016 by Fenhl (talk | contribs) (1.9.1-pre3 is compatible with pre2)
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This page documents the changes from the last stable Minecraft release (currently 1.9, protocol 107) to the current pre-release (currently 1.9.1-pre3, protocol 108). 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 Current Pre
Play clientbound
0x23 Join Game Current Pre

New/modified data types

None so far.

Handshaking

Clientbound

No changes so far.

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 107 108)
Server Address String hostname or IP, e.g. localhost or 127.0.0.1 (does this support IPv6?)
Server Port Unsigned Short default is 25565
Next State VarInt Enum 1 for status, 2 for login

Play

Clientbound

Join Game

See Protocol Encryption for information on logging in.

Packet ID State Bound To Field Name Field Type Notes
0x23 Play Client Entity ID Int The player's Entity ID (EID)
Gamemode Unsigned Byte 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. Bit 3 (0x8) is the hardcore flag.
Dimension Byte Int Enum -1: Nether, 0: Overworld, 1: End
Difficulty Unsigned Byte 0: peaceful, 1: easy, 2: normal, 3: hard
Max Players Unsigned Byte Used by the client to draw the player list
Level Type String default, flat, largeBiomes, amplified, default_1_1
Reduced Debug Info Boolean If true, a Notchian client shows reduced information on the debug screen.

Serverbound

No changes so far.

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

No changes so far.

Serverbound

No changes so far.