Pre-release protocol
This page documents the changes from the last stable Minecraft release (currently 1.10.2, protocol 210) to the current pre-release (currently 16w39a, protocol 307). 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
Contents
- 1 Contents
- 2 New/modified data types
- 2.1 Mobs
- 2.2 Entity Metadata
- 2.3 EvocationIllager
- 2.4 Vex
- 2.5 VindicationIllager
- 2.6 AbstractSkeleton
- 2.7 Skeleton
- 2.8 Wither Skeleton
- 2.9 Stray
- 2.10 Zombie
- 2.11 Zombie Villager
- 2.12 Husk
- 2.13 Guardian
- 2.14 ElderGuardian
- 2.15 AbstractHorse
- 2.16 Horse
- 2.17 ZombieHorse
- 2.18 SkeletonHorse
- 2.19 ChestedHorse
- 2.20 Donkey
- 2.21 Liama
- 2.22 Mule
- 2.23 Shulker
- 3 Handshaking
- 4 Play
- 5 Status
- 6 Login
Data types
No changes so far.
Packets
No changes so far.
ID | Packet name | Documentation | |
---|---|---|---|
Handshaking serverbound | |||
0x00 | Handshake | Current | Pre |
Play clientbound | |||
0x03 | Spawn Mob | Current | Pre |
0x48 | Collect Item | Current | Pre |
Play serverbound | |||
0x02 | Chat Message (serverbound) | Current | Pre |
New/modified data types
Mobs
Mobs are spawned via Spawn Mob. There are two extra mob types in the code that refer to mobs classes that can never spawn: Mob and Monster (they are always subclasses, aka another more specific type).
Type | Name | x, z | y | ID |
---|---|---|---|---|
4 | ElderGuardian | 0.85 | 0.85 | minecraft:elder_guardian
|
5 | WitherSkeleton | 0.7 | 2.4 | minecraft:wither_skeleton
|
6 | Stray | 0.6 | 1.99 | minecraft:stray
|
23 | Husk | 0.6 | 1.95 | minecraft:husk
|
27 | ZombieVillager | 0.6 | 1.95 | minecraft:zombie_villager
|
28 | SkeletonHorse | 1.396484 | 1.6 | minecraft:skeleton_horse
|
29 | ZombieHorse | 1.396484 | 1.6 | minecraft:zombie_horse
|
31 | Donkey | 1.396484 | 1.6 | minecraft:donkey
|
32 | Mule | 1.396484 | 1.6 | minecraft:mule
|
33 | EvocationFangs | 0.5 | 0.8 | minecraft:evocation_fangs
|
34 | EvocationIllager | 0.6 | 1.95 | minecraft:evocation_illager
|
35 | Vex | 0.4 | 0.8 | minecraft:vex
|
36 | VindicationIllager | 0.6 | 1.95 | minecraft:vindication_illager
|
48 | Mob | N/A | N/A | |
49 | Monster | N/A | N/A | |
50 | Creeper | 0.6 | 1.7 | minecraft:creeper
|
51 | Skeleton | 0.6 | 1.99 | minecraft:skeleton
|
52 | Spider | 1.4 | 0.9 | minecraft:spider
|
53 | 0.6 * 6 | 1.8 * 6 | minecraft:giant
| |
54 | Zombie | 0.6 | 1.8 | minecraft:zombie
|
55 | Slime | 0.51000005 * size | 0.51000005 * size | minecraft:slime
|
56 | Ghast | 4 | 4 | minecraft:ghast
|
57 | 0.6 | 1.8 | minecraft:zombie_pigman
| |
58 | Enderman | 0.6 | 2.9 | minecraft:enderman
|
59 | 0.7 | 0.5 | minecraft:cave_spider
| |
60 | Silverfish | 0.4 | 0.3 | minecraft:silverfish
|
61 | Blaze | 0.6 | 1.8 | minecraft:blaze
|
62 | 0.51000005 * size | 0.51000005 * size | minecraft:magma_cube
| |
63 | 16.0 | 8.0 | minecraft:ender_dragon
| |
64 | 0.9 | 3.5 | minecraft:wither
| |
65 | Bat | 0.5 | 0.9 | minecraft:bat
|
66 | Witch | 0.6 | 1.8 | minecraft:witch
|
67 | Endermite | 0.4 | 0.3 | minecraft:endermite
|
68 | Guardian | 0.85 | 0.85 | minecraft:guardian
|
69 | Shulker | 1 | 1 | minecraft:shulker
|
90 | Pig | 0.9 | 0.9 | minecraft:pig
|
91 | Sheep | 0.9 | 1.3 | minecraft:sheep
|
92 | Cow | 0.9 | 1.4 | minecraft:cow
|
93 | Chicken | 0.4 | 0.7 | minecraft:chicken
|
94 | Squid | 0.8 | 0.8 | minecraft:squid
|
95 | Wolf | 0.6 | 0.85 | minecraft:wolf
|
96 | 0.9 | 1.3 | minecraft:mooshroom
| |
97 | 0.7 | 1.9 | minecraft:snowman
| |
98 | 0.6 | 0.8 | minecraft:ocelot
| |
99 | 1.4 | 2.7 | minecraft:villager_golem
| |
100 | 1.396484 | 1.6 | minecraft:horse
| |
101 | Rabbit | 0.4 | 0.5 | minecraft:rabbit
|
102 | 1.3 | 1.4 | minecraft:polar_bear
| |
120 | Villager | 0.6 | 1.95 | minecraft:villager
|
Entity Metadata
EvocationIllager
Extends Monster.
Index | Type | Meaning | |
---|---|---|---|
12 | Byte | Unknown (Probably hands up animation) |
Vex
Extends Monster.
Index | Type | Meaning | |
---|---|---|---|
12 | Byte | Unknown (Probably the attack animation) |
VindicationIllager
Extends Monster.
Index | Type | Meaning | |
---|---|---|---|
12 | Byte | Unknown |
AbstractSkeleton
Extends Monster.
Index | Type | Meaning | |
---|---|---|---|
12 | Boolean | Is swinging arms |
Skeleton
Extends AbstractSkeleton.
Index | Type | Meaning | |
---|---|---|---|
12 | VarInt | Type (Normal = 0, Wither = 1, Stray = 2) | |
13 | Boolean | Is swinging arms (Used to animate arms for melee attacks; only used when the skeleton does not have a bow in its hand) |
Wither Skeleton
Extends AbstractSkeleton.
Stray
Extends AbstractSkeleton.
Zombie
Extends Monster.
Index | Type | Meaning | |
---|---|---|---|
12 | Boolean | Is baby | |
13 | VarInt | ||
14 | Boolean | Is converting | |
Boolean | Are hands held up |
Zombie Villager
Extends Zombie.
Index | Type | Meaning | |
---|---|---|---|
15 | Boolean | Is converting | |
16 | VarInt | Profession |
Husk
Extends Zombie.
Guardian
Extends Monster.
Index | Type | Meaning | |
---|---|---|---|
12 | Byte | Bit mask | Meaning |
0x02 | is retracting spikes | ||
0x04 | is elderly | ||
12 | Boolean | Is retracting spikes | |
13 | VarInt | Target EID |
ElderGuardian
Extends Guardian.
AbstractHorse
Extends Animal.
Index | Type | Meaning | |
---|---|---|---|
13 | Byte | Bit mask | Meaning |
0x01 | Unused | ||
0x02 | Is Tame | ||
0x04 | Is saddled | ||
0x08 | Has Chest | ||
0x10 | Is Bred (not used on the Notchian server; controlled via the unused Bred NBT flag) | ||
0x20 | Is eating | ||
0x40 | Is rearing (on hind legs) | ||
0x80 | Is mouth open | ||
14 | OptUUID | Owner |
Horse
Extends AbstractHorse.
Index | Type | Meaning | |
---|---|---|---|
15 | VarInt | Variant (Color & Style) | |
16 | VarInt | Armor |
ZombieHorse
Extends AbstractHorse.
SkeletonHorse
Extends AbstractHorse.
ChestedHorse
Extends AbstractHorse.
Index | Type | Meaning | |
---|---|---|---|
15 | Boolean | Has Chest |
Donkey
Extends ChestedHorse.
Liama
Extends ChestedHorse.
Index | Type | Meaning | |
---|---|---|---|
16 | Integer | Unknown | |
17 | Integer | Unknown | |
18 | Integer | Unknown |
Mule
Extends ChestedHorse.
Shulker
Extends Golem.
Index | Type | Meaning | |
---|---|---|---|
12 | Direction | Facing direction | |
13 | OptPosition | Attachment position | |
14 | Byte | Shield height | |
15 | Byte | Unknown |
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 |
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. | |||
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 |
Play
Clientbound
Spawn Mob
Sent by the server when a mob entity is spawned.
Packet ID | State | Bound To | Field Name | Field Type | Notes |
---|---|---|---|---|---|
0x03 | Play | Client | Entity ID | VarInt | |
Entity UUID | UUID | ||||
Type | The type of mob. See Entities#Mobs | ||||
X | Double | ||||
Y | Double | ||||
Z | Double | ||||
Yaw | Angle | ||||
Pitch | Angle | ||||
Head Pitch | Angle | ||||
Velocity X | Short | Same units as Entity Velocity | |||
Velocity Y | Short | Same units as Entity Velocity | |||
Velocity Z | Short | Same units as Entity Velocity | |||
Metadata | Entity Metadata |
Collect Item
Sent by the server when someone picks up an item lying on the ground — its sole purpose appears to be the animation of the item flying towards you. It doesn't destroy the entity in the client memory, and it doesn't add it to your inventory. The server only checks for items to be picked up after each Player Position (and Player Position And Look) packet sent by the client.
Packet ID | State | Bound To | Field Name | Field Type | Notes |
---|---|---|---|---|---|
0x48 | Play | Client | Collected Entity ID | VarInt | |
Collector Entity ID | VarInt | ||||
Pickup Item Count | VarInt | Seems to be 1 for XP orbs, otherwise the number of items in the stack. |
Serverbound
Chat Message (serverbound)
Used to send a chat message to the server. The message may not be longer than 100 256 characters or else the server will kick the client.
If the message starts with a /
, the server will attempt to interpret it as a command. Otherwise, the server will broadcast the same chat message to all players on the server (including the player that sent the message), prepended with player's name. Specifically, it will respond with a translate chat component, "chat.type.text
" with the first parameter set to the display name of the player (including some chat component logic to support clicking the name to send a PM) and the second parameter set to the message.
Packet ID | State | Bound To | Field Name | Field Type | Notes |
---|---|---|---|---|---|
0x02 | Play | Server | Message | String | The client sends the raw input, not a Chat component |
Status
Clientbound
No changes so far.
Serverbound
No changes so far.
Login
Clientbound
No changes so far.
Serverbound
No changes so far.