Difference between revisions of "Protocol"

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(Example of how to properly format a table)
 
(Massive table cleanup)
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All packets begin with a single "Packet ID" byte.  Listed packet size includes this byte.  Packets are either "server to client", "client to server", or "Two-Way" (both). Packets are not prefixed with their length. For variable length packets, you must parse it completely to determine its length.
 
All packets begin with a single "Packet ID" byte.  Listed packet size includes this byte.  Packets are either "server to client", "client to server", or "Two-Way" (both). Packets are not prefixed with their length. For variable length packets, you must parse it completely to determine its length.
 
  
 
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Line 36: Line 35:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" | 0x00
+
| 0x00
| class="col1 centeralign" | Keep-alive ID
+
| Keep-alive ID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>957759560</code>
+
| <code>957759560</code>
| class="col4" | Server-generated random id
+
| Server-generated random id
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 5 bytes
+
| colspan="4" | 5 bytes
 
|}
 
|}
  
Line 62: Line 61:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="7" | 0x01
+
| rowspan="7" | 0x01
| class="col1 centeralign" | Entity ID
+
| Entity ID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>1298</code>
+
| <code>1298</code>
| class="col4" | The Player's Entity ID
+
| The Player's Entity ID
|- class="row2"
+
|-
| class="col0 centeralign" | Level type
+
| Level type
| class="col1 centeralign" | string
+
| string
| class="col2 centeralign" | default
+
| default
| class="col3" | <code>default</code>, <code>flat</code>, or <code>largeBiomes</code>. level-type in server.properties
+
| <code>default</code>, <code>flat</code>, or <code>largeBiomes</code>. level-type in server.properties
|- class="row3"
+
|-
| class="col0 centeralign" | Game mode
+
| Game mode
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" | <code>0</code>: survival, <code>1</code>: creative, <code>2</code>: adventure. Bit 3 (<code>0x8</code>) is the hardcore flag
+
| <code>0</code>: survival, <code>1</code>: creative, <code>2</code>: adventure. Bit 3 (<code>0x8</code>) is the hardcore flag
|- class="row4"
+
|-
| class="col0 centeralign" | Dimension
+
| Dimension
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" | <code>-1</code>: nether, <code>0</code>: overworld, <code>1</code>: end
+
| <code>-1</code>: nether, <code>0</code>: overworld, <code>1</code>: end
|- class="row5"
+
|-
| class="col0 centeralign" | Difficulty
+
| Difficulty
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>1</code>
+
| <code>1</code>
| class="col3" | <code>0</code> thru <code>3</code> for Peaceful, Easy, Normal, Hard
+
| <code>0</code> thru <code>3</code> for Peaceful, Easy, Normal, Hard
|- class="row6"
+
|-
| class="col0 centeralign" | Not used
+
| Not used
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" | Only 0 observed from vanilla server, was previously world height
+
| Only 0 observed from vanilla server, was previously world height
|- class="row7"
+
|-
| class="col0 centeralign" | Max players
+
| Max players
| class="col1 centeralign" |  byte
+
| byte
| class="col2 centeralign" | <code>8</code>
+
| <code>8</code>
| class="col3" | Used by the client to draw the player list
+
| Used by the client to draw the player list
|- class="row8"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 12 bytes + length of strings
+
| colspan="4" | 12 bytes + length of strings
 
|}
 
|}
  
Line 118: Line 117:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="4" | 0x02
+
| rowspan="4" | 0x02
| class="col1 centeralign" | Protocol Version
+
| Protocol Version
| class="col2 centeralign" | byte
+
| byte
| class="col3 centeralign" | <code>51</code>
+
| <code>51</code>
| class="col4" | As of 1.5.2 the protocol version is 61. See [[Protocol version numbers]] for list.
+
| As of 1.5.2 the protocol version is 61. See [[Protocol version numbers]] for list.
|- class="row2"
+
|-
| class="col0 centeralign" | Username
+
| Username
| class="col1 centeralign" | string
+
| string
| class="col2 centeralign" | <code>_AlexM</code>
+
| <code>_AlexM</code>
| class="col3" | The username of the player attempting to connect
+
| The username of the player attempting to connect
|- class="row3"
+
|-
| class="col0 centeralign" | Server Host
+
| Server Host
| class="col1 centeralign" | string
+
| string
| class="col2 centeralign" | <code>localhost</code>
+
| <code>localhost</code>
| class="col3" |  
+
|
|- class="row4"
+
|-
| class="col0 centeralign" | Server Port
+
| Server Port
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>25565</code>
+
| <code>25565</code>
| class="col3" |  
+
|
|- class="row5"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 10 bytes + length of strings
+
| colspan="4" | 10 bytes + length of strings
 
|}
 
|}
  
Line 161: Line 160:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" | 0x03
+
| 0x03
| class="col1 centeralign" | Message
+
| Message
| class="col2 centeralign" | string
+
| string
| class="col3 centeralign" | <code>&lt;Bob&gt; Hello World!</code>
+
| <code>&lt;Bob&gt; Hello World!</code>
| class="col4" | User input '''must''' be sanitized server-side
+
| User input '''must''' be sanitized server-side
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 3 bytes + length of strings
+
| colspan="4" | 3 bytes + length of strings
 
|}
 
|}
  
Line 192: Line 191:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
! class="col0" | Packet ID
+
! | Packet ID
! class="col1" | Field Name
+
! | Field Name
! class="col2" | Field Type
+
! | Field Type
! class="col3" | Example
+
! | Example
! class="col4" | Notes
+
! | Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="2" | 0x04
+
| rowspan="2" | 0x04
| class="col1 centeralign" | Age of the world
+
| Age of the world
| class="col2 centeralign" | long
+
| long
| class="col3 centeralign" | 45464654
+
| 45464654
| class="col4" | In ticks; not changed by server commands
+
| In ticks; not changed by server commands
|- class="row2"
+
|-
| class="col0 centeralign" | Time of Day
+
| Time of Day
| class="col1 centeralign" | long
+
| long
| class="col2 centeralign" | 21321
+
| 21321
| class="col3" | The world (or region) time, in ticks
+
| The world (or region) time, in ticks
|- class="row3"
+
|-
! class="col0" | Total Size:
+
! | Total Size:
| class="col1 rightalign" colspan="4" | 17 Bytes
+
| colspan="4" | 17 Bytes
 
|}
 
|}
  
Line 222: Line 221:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="3" | 0x05
+
| rowspan="3" | 0x05
| class="col1 centeralign" | Entity ID
+
| Entity ID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | 0x00010643
+
| 0x00010643
| class="col4" | Named Entity ID
+
| Named Entity ID
|- class="row2"
+
|-
| class="col0 centeralign" | Slot
+
| Slot
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | 4
+
| 4
| class="col3" | Equipment slot: 0=held, 1-4=armor slot (1 - boots, 2 - leggings, 3 - chestplate, 4 - helmet)
+
| Equipment slot: 0=held, 1-4=armor slot (1 - boots, 2 - leggings, 3 - chestplate, 4 - helmet)
|- class="row3"
+
|-
| class="col0 centeralign" | Item
+
| Item
| class="col1 centeralign" | [[Slot_Data|slot]]
+
| [[Slot_Data|slot]]
| class="col2 centeralign" |  
+
|
| class="col3" | Item in slot format
+
| Item in slot format
|- class="row5"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 7 bytes + slot data
+
| colspan="4" | 7 bytes + slot data
 
|}
 
|}
  
Line 258: Line 257:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="3" | 0x06
+
| rowspan="3" | 0x06
| class="col1 centeralign" | X
+
| X
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>117</code>
+
| <code>117</code>
| class="col4 centeralign" | Spawn X in block coordinates
+
| Spawn X in block coordinates
|- class="row2"
+
|-
| class="col0 centeralign" | Y
+
| Y
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>70</code>
+
| <code>70</code>
| class="col3 centeralign" | Spawn Y in block coordinates
+
| Spawn Y in block coordinates
|- class="row3"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>-46</code>
+
| <code>-46</code>
| class="col3 centeralign" | Spawn Z in block coordinates
+
| Spawn Z in block coordinates
|- class="row4"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 13 bytes
+
| colspan="4" | 13 bytes
 
|}
 
|}
  
Line 296: Line 295:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="3" | 0x07
+
| rowspan="3" | 0x07
| class="col1 centeralign" | User
+
| User
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>1298</code>
+
| <code>1298</code>
| class="col4" | The entity of the player (ignored by the server)
+
| The entity of the player (ignored by the server)
|- class="row2"
+
|-
| class="col0 centeralign" | Target
+
| Target
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>1805</code>
+
| <code>1805</code>
| class="col3" | The entity the player is interacting with
+
| The entity the player is interacting with
|- class="row3"
+
|-
| class="col0 centeralign" | Mouse button
+
| Mouse button
| class="col1 centeralign" | boolean
+
| boolean
| class="col2 centeralign" | <code>true</code>
+
| <code>true</code>
| class="col3" | <code>true</code> when the player is left-clicking and <code>false</code> when right-clicking.
+
| <code>true</code> when the player is left-clicking and <code>false</code> when right-clicking.
|- class="row4"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 10 bytes
+
| colspan="4" | 10 bytes
 
|}
 
|}
  
Line 335: Line 334:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="3" | 0x08
+
| rowspan="3" | 0x08
| class="col1 centeralign" | Health
+
| Health
| class="col2 centeralign" | short
+
| short
| class="col3 centeralign" | 20
+
| 20
| class="col4" | 0 or less = dead, 20 = full HP
+
| 0 or less = dead, 20 = full HP
|- class="row2"
+
|-
| class="col0 centeralign" | Food
+
| Food
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | 20
+
| 20
| class="col3" | 0 - 20
+
| 0 - 20
|- class="row3"
+
|-
| class="col0 centeralign" | Food Saturation
+
| Food Saturation
| class="col1 centeralign" | float
+
| float
| class="col2 centeralign" | 5.0
+
| 5.0
| class="col3" | Seems to vary from 0.0 to 5.0 in integer increments
+
| Seems to vary from 0.0 to 5.0 in integer increments
|- class="row4"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 9 bytes
+
| colspan="4" | 9 bytes
 
|}
 
|}
  
Line 371: Line 370:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="5" | 0x09
+
| rowspan="5" | 0x09
| class="col1 centeralign" | Dimension
+
| Dimension
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>1</code>
+
| <code>1</code>
| class="col4" | <code>-1</code>: The Nether, <code>0</code>: The Overworld, <code>1</code>: The End
+
| <code>-1</code>: The Nether, <code>0</code>: The Overworld, <code>1</code>: The End
|- class="row2"
+
|-
| class="col0 centeralign" | Difficulty
+
| Difficulty
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>1</code>
+
| <code>1</code>
| class="col3" | <code>0</code> thru <code>3</code> for Peaceful, Easy, Normal, Hard. <code>1</code> is always sent c->s
+
| <code>0</code> thru <code>3</code> for Peaceful, Easy, Normal, Hard. <code>1</code> is always sent c->s
|- class="row3"
+
|-
| class="col0 centeralign" | Game mode
+
| Game mode
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>1</code>
+
| <code>1</code>
| class="col3" | <code>0</code>: survival, <code>1</code>: creative, <code>2</code>: adventure. The hardcore flag is not included
+
| <code>0</code>: survival, <code>1</code>: creative, <code>2</code>: adventure. The hardcore flag is not included
|- class="row4"
+
|-
| class="col0 centeralign" | World height
+
| World height
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>256</code>
+
| <code>256</code>
| class="col3" | Defaults to <code>256</code>
+
| Defaults to <code>256</code>
|- class="row5"
+
|-
| class="col0 centeralign" | Level type
+
| Level type
| class="col1 centeralign" | string
+
| string
| class="col2 centeralign" | default
+
| default
| class="col3" | See [[#0x01|0x01 login]]
+
| See [[#0x01|0x01 login]]
|- class="row6"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 11 bytes + length of string
+
| colspan="4" | 11 bytes + length of string
 
|}
 
|}
 
{{anchor|0x0A}}
 
{{anchor|0x0A}}
Line 423: Line 422:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" | 0x0A
+
| 0x0A
| class="col1 centeralign" | On Ground
+
| On Ground
| class="col2 centeralign" | boolean
+
| boolean
| class="col3 centeralign" | <code>1</code>
+
| <code>1</code>
| class="col4" | <code>True</code> if the client is on the ground, <code>False</code> otherwise
+
| <code>True</code> if the client is on the ground, <code>False</code> otherwise
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 2 bytes
+
| colspan="4" | 2 bytes
 
|}
 
|}
  
Line 453: Line 452:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="5" | 0x0B
+
| rowspan="5" | 0x0B
| class="col1 centeralign" | X
+
| X
| class="col2 centeralign" | double
+
| double
| class="col3 rightalign" | <code>102.809</code>
+
| <code>102.809</code>
| class="col4" | Absolute position
+
| Absolute position
|- class="row2"
+
|-
| class="col0 centeralign" | Y
+
| Y
| class="col1 centeralign" | double
+
| double
| class="col2 centeralign" | <code>70.00</code>
+
| <code>70.00</code>
| class="col3" | Absolute position
+
| Absolute position
|- class="row3"
+
|-
| class="col0 centeralign" | Stance
+
| Stance
| class="col1 centeralign" | double
+
| double
| class="col2 centeralign" | <code>71.62</code>
+
| <code>71.62</code>
| class="col3" | Used to modify the players bounding box when going up stairs, crouching, etc…
+
| Used to modify the players bounding box when going up stairs, crouching, etc…
|- class="row4"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | double
+
| double
| class="col2 centeralign" | <code>68.30</code>
+
| <code>68.30</code>
| class="col3" | Absolute position
+
| Absolute position
|- class="row5"
+
|-
| class="col0 centeralign" | On Ground
+
| On Ground
| class="col1 centeralign" | boolean
+
| boolean
| class="col2 centeralign" | <code>1</code>
+
| <code>1</code>
| class="col3" |
+
|
 
Derived from packet [[#0x0A|0x0A]]
 
Derived from packet [[#0x0A|0x0A]]
|- class="row6"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 34 bytes
+
| colspan="4" | 34 bytes
 
|}
 
|}
  
Line 511: Line 510:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="3" | 0x0C
+
| rowspan="3" | 0x0C
| class="col1 centeralign" | Yaw
+
| Yaw
| class="col2 centeralign" | float
+
| float
| class="col3 centeralign" | <code>0.00</code>
+
| <code>0.00</code>
| class="col4" | Absolute rotation on the X Axis, in degrees
+
| Absolute rotation on the X Axis, in degrees
|- class="row2"
+
|-
| class="col0 centeralign" | Pitch
+
| Pitch
| class="col1 centeralign" | float
+
| float
| class="col2 centeralign" | <code>0.00</code>
+
| <code>0.00</code>
| class="col3" | Absolute rotation on the Y Axis, in degrees
+
| Absolute rotation on the Y Axis, in degrees
|- class="row3"
+
|-
| class="col0 centeralign" | On Ground
+
| On Ground
| class="col1 centeralign" | boolean
+
| boolean
| class="col2 centeralign" | <code>1</code>
+
| <code>1</code>
| class="col3" |
+
|
 
Derived from packet [[#0x0A|0x0A]]
 
Derived from packet [[#0x0A|0x0A]]
|- class="row4"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 10 bytes
+
| colspan="4" | 10 bytes
 
|}
 
|}
  
Line 550: Line 549:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="7" | 0x0D
+
| rowspan="7" | 0x0D
| class="col1 centeralign" | X
+
| X
| class="col2 centeralign" | double
+
| double
| class="col3 centeralign" | <code>6.5</code>
+
| <code>6.5</code>
| class="col4" | Absolute position
+
| Absolute position
|- class="row2"
+
|-
| class="col0 centeralign" | Y
+
| Y
| class="col1 centeralign" | double
+
| double
| class="col2 centeralign" | <code>65.620000004768372</code>
+
| <code>65.620000004768372</code>
| class="col3" | Absolute position
+
| Absolute position
|- class="row3"
+
|-
| class="col0 centeralign" | Stance
+
| Stance
| class="col1 centeralign" | double
+
| double
| class="col2 centeralign" | <code>67.240000009536743</code>
+
| <code>67.240000009536743</code>
| class="col3" | Used to modify the players bounding box when going up stairs, crouching, etc…
+
| Used to modify the players bounding box when going up stairs, crouching, etc…
|- class="row4"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | double
+
| double
| class="col2 centeralign" | <code>7.5</code>
+
| <code>7.5</code>
| class="col3" | Absolute position
+
| Absolute position
|- class="row5"
+
|-
| class="col0 centeralign" | Yaw
+
| Yaw
| class="col1 centeralign" | float
+
| float
| class="col2 centeralign" | <code>0.0</code>
+
| <code>0.0</code>
| class="col3" | Absolute rotation on the X Axis
+
| Absolute rotation on the X Axis
|- class="row6"
+
|-
| class="col0 centeralign" | Pitch
+
| Pitch
| class="col1 centeralign" | float
+
| float
| class="col2 centeralign" | <code>0.0</code>
+
| <code>0.0</code>
| class="col3" | Absolute rotation on the Y Axis
+
| Absolute rotation on the Y Axis
|- class="row7"
+
|-
| class="col0 centeralign" | On Ground
+
| On Ground
| class="col1 centeralign" | boolean
+
| boolean
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" |
+
|
 
Derived from packet [[#0x0A|0x0A]]
 
Derived from packet [[#0x0A|0x0A]]
|- class="row8"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 42 bytes
+
| colspan="4" | 42 bytes
 
|}
 
|}
  
Line 608: Line 607:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="5" | 0x0E
+
| rowspan="5" | 0x0E
| class="col1 centeralign" | Status
+
| Status
| class="col2 centeralign" | byte
+
| byte
| class="col3 centeralign" | <code>1</code>
+
| <code>1</code>
| class="col4" | The action the player is taking against the block (see below)
+
| The action the player is taking against the block (see below)
|- class="row2"
+
|-
| class="col0 centeralign" | X
+
| X
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>32</code>
+
| <code>32</code>
| class="col3" | Block position
+
| Block position
|- class="row3"
+
|-
| class="col0 centeralign" | Y
+
| Y
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>64</code>
+
| <code>64</code>
| class="col3" | Block position
+
| Block position
|- class="row4"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>32</code>
+
| <code>32</code>
| class="col3 leftalign" | Block position
+
| Block position
|- class="row5"
+
|-
| class="col0 centeralign" | Face
+
| Face
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>3</code>
+
| <code>3</code>
| class="col3" | The face being hit (see below)
+
| The face being hit (see below)
|- class="row6"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 12 bytes
+
| colspan="4" | 12 bytes
|}
+
|}
  
 
Status can (currently) be one of six values:
 
Status can (currently) be one of six values:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Meaning
+
| Meaning
| class="col1" | Value
+
| Value
|- class="row1"
+
|-
| class="col0 leftalign" | Started digging
+
| Started digging
| class="col1 centeralign" | <code>0</code>
+
| <code>0</code>
|- class="row2"
+
|-
| class="col0 leftalign" | Cancelled digging
+
| Cancelled digging
| class="col1 centeralign" | <code>1</code>
+
| <code>1</code>
|- class="row3"
+
|-
| class="col0 leftalign" | Finished digging
+
| Finished digging
| class="col1 centeralign" | <code>2</code>
+
| <code>2</code>
|- class="row4"
+
|-
| class="col0 leftalign" | Drop item stack
+
| Drop item stack
| class="col1 centeralign" | <code>3</code>
+
| <code>3</code>
|- class="row5"
+
|-
| class="col0 leftalign" | Drop item
+
| Drop item
| class="col1 centeralign" | <code>4</code>
+
| <code>4</code>
|- class="row6"
+
|-
| class="col0 leftalign" | Shoot arrow / finish eating
+
| Shoot arrow / finish eating
| class="col1 centeralign" | <code>5</code>
+
| <code>5</code>
 
|}
 
|}
  
Line 680: Line 679:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0 leftalign" | Value
+
| Value
| class="col1 centeralign" | 0
+
| 0
| class="col2 centeralign" | 1
+
| 1
| class="col3 centeralign" | 2
+
| 2
| class="col4 centeralign" | 3
+
| 3
| class="col5 centeralign" | 4
+
| 4
| class="col6 centeralign" | 5
+
| 5
|- class="row1"
+
|-
| class="col0 leftalign" | Offset
+
| Offset
| class="col1" | -Y
+
| -Y
| class="col2" | +Y
+
| +Y
| class="col3" | -Z
+
| -Z
| class="col4" | +Z
+
| +Z
| class="col5" | -X
+
| -X
| class="col6" | +X
+
| +X
 
|}
 
|}
  
Line 708: Line 707:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="8" | 0x0F
+
| rowspan="8" | 0x0F
| class="col1 centeralign" | X
+
| X
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>32</code>
+
| <code>32</code>
| class="col4" | Block position
+
| Block position
|- class="row2"
+
|-
| class="col0 centeralign" | Y
+
| Y
| class="col1 centeralign" | unsigned byte
+
| unsigned byte
| class="col2 centeralign" | <code>64</code>
+
| <code>64</code>
| class="col3" | Block position
+
| Block position
|- class="row3"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>32</code>
+
| <code>32</code>
| class="col3 leftalign" | Block position
+
| Block position
|- class="row4"
+
|-
| class="col0 centeralign" | Direction
+
| Direction
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>3</code>
+
| <code>3</code>
| class="col3" | The offset to use for block/item placement (see below)
+
| The offset to use for block/item placement (see below)
|- class="row5"
+
|-
| class="col0 centeralign" | Held item
+
| Held item
| class="col1 centeralign" | [[Slot_Data|slot]]
+
| [[Slot_Data|slot]]
| class="col2 centeralign" |  
+
|
| class="col3" |  
+
|
|- class="row6"
+
|-
| class="col0 centeralign" | Cursor position X
+
| Cursor position X
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 0 - 16
+
| 0 - 16
| class="col3" | The position of the crosshair on the block
+
| The position of the crosshair on the block
|- class="row7"
+
|-
| class="col0 centeralign" | Cursor position Y
+
| Cursor position Y
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 0 - 16
+
| 0 - 16
| class="col3" |  
+
|
|- class="row8"
+
|-
| class="col0 centeralign" | Cursor position Z
+
| Cursor position Z
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 0 - 16
+
| 0 - 16
| class="col3" |  
+
|
|- class="row9"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 14 bytes + slot data
+
| colspan="4" | 14 bytes + slot data
|}
+
|}
In normal operation (ie placing a block), this packet is sent once, with the values set normally.
+
In normal operation (ie placing a block), this packet is sent once, with the values set normally.
 
+
 
 
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, shooting bows, using buckets, etc.
 
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, shooting bows, using buckets, etc.
  
Line 777: Line 776:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" | 0x10
+
| 0x10
| class="col1 centeralign" | Slot ID
+
| Slot ID
| class="col2 centeralign" | short
+
| short
| class="col3 centeralign" | <code>1</code>
+
| <code>1</code>
| class="col4" | The slot which the player has selected (0-8)
+
| The slot which the player has selected (0-8)
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 3 bytes
+
| colspan="4" | 3 bytes
 
|}
 
|}
  
Line 808: Line 807:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="5" | 0x11
+
| rowspan="5" | 0x11
| class="col1 centeralign" | Entity ID
+
| Entity ID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | 89
+
| 89
| class="col4" | Player ID
+
| Player ID
|- class="row2"
+
|-
| class="col0 centeralign" | Unknown
+
| Unknown
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 0
+
| 0
| class="col3" | Only 0 has been observed
+
| Only 0 has been observed
|- class="row1"
+
|-
| class="col0 centeralign" | X coordinate
+
| X coordinate
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | -247
+
| -247
| class="col3" | Bed headboard X as block coordinate
+
| Bed headboard X as block coordinate
|- class="row2"
+
|-
| class="col0 centeralign" | Y coordinate
+
| Y coordinate
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 78
+
| 78
| class="col3" | Bed headboard Y as block coordinate
+
| Bed headboard Y as block coordinate
|- class="row1"
+
|-
| class="col0 centeralign" | Z coordinate
+
| Z coordinate
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | 128
+
| 128
| class="col3" | Bed headboard Z as block coordinate
+
| Bed headboard Z as block coordinate
|- class="row3"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 15 bytes
+
| colspan="4" | 15 bytes
 
|}
 
|}
  
Line 855: Line 854:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="2" | 0x12
+
| rowspan="2" | 0x12
| class="col1 centeralign" | EID
+
| EID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>55534</code>
+
| <code>55534</code>
| class="col4" | Player ID
+
| Player ID
|- class="row2"
+
|-
| class="col0 centeralign" | Animation
+
| Animation
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>1</code>
+
| <code>1</code>
| class="col3" | Animation ID
+
| Animation ID
|- class="row3"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 6 bytes
+
| colspan="4" | 6 bytes
 
|}
 
|}
  
Line 923: Line 922:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="2" | 0x13
+
| rowspan="2" | 0x13
| class="col1 centeralign" | EID
+
| EID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>55534</code>
+
| <code>55534</code>
| class="col4" | Player ID
+
| Player ID
|- class="row2"
+
|-
| class="col0 centeralign" | Action ID
+
| Action ID
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>1</code>
+
| <code>1</code>
| class="col3" | The ID of the action, see below.
+
| The ID of the action, see below.
|- class="row3"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 6 bytes
+
| colspan="4" | 6 bytes
|}
+
|}
  
 
Action ID can be one of the following values:
 
Action ID can be one of the following values:
Line 982: Line 981:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0 centeralign" | Packet ID
+
| Packet ID
| class="col1 rightalign" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="9" | 0x14
+
| rowspan="9" | 0x14
| class="col1" | EID
+
| EID
| class="col2" | int
+
| int
| class="col3" | <code>94453</code>
+
| <code>94453</code>
| class="col4" | Player ID
+
| Player ID
|- class="row2"
+
|-
| class="col0" | Player Name
+
| Player Name
| class="col1" | string
+
| string
| class="col2" | <code>Twdtwd</code>
+
| <code>Twdtwd</code>
| class="col3" | Max length of 16
+
| Max length of 16
|- class="row3"
+
|-
| class="col0" | X
+
| X
| class="col1" | int
+
| int
| class="col2" | <code>784</code>
+
| <code>784</code>
| class="col3" | Player X as Absolute Integer
+
| Player X as Absolute Integer
|- class="row4"
+
|-
| class="col0" | Y
+
| Y
| class="col1" | int
+
| int
| class="col2" | <code>2131</code>
+
| <code>2131</code>
| class="col3" | Player Y as Absolute Integer
+
| Player Y as Absolute Integer
|- class="row5"
+
|-
| class="col0" | Z
+
| Z
| class="col1" | int
+
| int
| class="col2" | <code>-752</code>
+
| <code>-752</code>
| class="col3" | Player Z as Absolute Integer
+
| Player Z as Absolute Integer
|- class="row6"
+
|-
| class="col0" | Yaw
+
| Yaw
| class="col1" | byte
+
| byte
| class="col2" | <code>0</code>
+
| <code>0</code>
| class="col3" | Player rotation as a packed byte
+
| Player rotation as a packed byte
|- class="row7"
+
|-
| class="col0" | Pitch
+
| Pitch
| class="col1" | byte
+
| byte
| class="col2" | <code>0</code>
+
| <code>0</code>
| class="col3" | Player rotation as a packed byte
+
| Player rotation as a packed byte
|- class="row8"
+
|-
| class="col0" | Current Item
+
| Current Item
| class="col1" | short
+
| short
| class="col2" | <code>0</code>
+
| <code>0</code>
| class="col3" | The item the player is currently holding. Note that this should be 0 for "no item", unlike -1 used in other packets. A negative value crashes clients.
+
| The item the player is currently holding. Note that this should be 0 for "no item", unlike -1 used in other packets. A negative value crashes clients.
|- class="row9"
+
|-
| class="col0" | Metadata
+
| Metadata
| class="col1" | [[Entities#Entity_Metadata_Format|Metadata]]
+
| [[Entities#Entity_Metadata_Format|Metadata]]
| class="col2" | <code></code>
+
| <code></code>
| class="col3" | The 1.3 client crashes on packets with no metadata, but the server can send any metadata key of 0, 1 or 8 and the client is fine.
+
| The 1.3 client crashes on packets with no metadata, but the server can send any metadata key of 0, 1 or 8 and the client is fine.
|- class="row10"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 22 bytes + length of strings + metadata (at least 1)
+
| colspan="4" | 22 bytes + length of strings + metadata (at least 1)
 
|}
 
|}
  
Line 1,048: Line 1,047:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="2" | 0x16
+
| rowspan="2" | 0x16
| class="col1 centeralign" | Collected EID
+
| Collected EID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>38</code>
+
| <code>38</code>
| class="col4 leftalign" |
+
|
|- class="row2"
+
|-
| class="col0 centeralign" | Collector EID
+
| Collector EID
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>20</code>
+
| <code>20</code>
| class="col3 leftalign" |
+
|
|- class="row3"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 9 bytes
+
| colspan="4" | 9 bytes
 
|}
 
|}
  
Line 1,079: Line 1,078:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="9" | 0x17
+
| rowspan="9" | 0x17
| class="col1 centeralign" | EID
+
| EID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>62</code>
+
| <code>62</code>
| class="col4" | Entity ID of the Object
+
| Entity ID of the Object
|- class="row2"
+
|-
| class="col0 centeralign" | Type
+
| Type
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>11</code>
+
| <code>11</code>
| class="col3" | The type of object (see [[Entities#Objects]])
+
| The type of object (see [[Entities#Objects]])
|- class="row3"
+
|-
| class="col0 centeralign" | X
+
| X
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>16080</code>
+
| <code>16080</code>
| class="col3" | The Absolute Integer X Position of the object
+
| The Absolute Integer X Position of the object
|- class="row4"
+
|-
| class="col0 centeralign" | Y
+
| Y
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>2299</code>
+
| <code>2299</code>
| class="col3" | The Absolute Integer Y Position of the object
+
| The Absolute Integer Y Position of the object
|- class="row5"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>592</code>
+
| <code>592</code>
| class="col3" | The Absolute Integer Z Position of the object
+
| The Absolute Integer Z Position of the object
|- class="row5"
+
|-
| class="col0 centeralign" | Pitch
+
| Pitch
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>67</code>
+
| <code>67</code>
| class="col3" | The pitch in steps of 2p/256
+
| The pitch in steps of 2p/256
|- class="row5"
+
|-
| class="col0 centeralign" | Yaw
+
| Yaw
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" | The yaw in steps of 2p/256
+
| The yaw in steps of 2p/256
|- class="row6"
+
|-
| class="col0 centeralign" | [[Object Data]]
+
| [[Object Data]]
| class="col1 centeralign" |  
+
|
| class="col2 centeralign" |  
+
|
| class="col3" | [[Object Data]]
+
| [[Object Data]]
|- class="row6"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 23 or 29 bytes
+
| colspan="4" | 23 or 29 bytes
|}
+
|}
 
+
 
{{anchor|0x18}}
+
{{anchor|0x18}}
 
+
 
 
=== Spawn Mob (0x18) ===
 
=== Spawn Mob (0x18) ===
  
Line 1,140: Line 1,139:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="12" | 0x18
+
| rowspan="12" | 0x18
| class="col1 centeralign" | EID
+
| EID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>446</code>
+
| <code>446</code>
| class="col4" | Entity ID
+
| Entity ID
|- class="row2"
+
|-
| class="col0 centeralign" | Type
+
| Type
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>91</code>
+
| <code>91</code>
| class="col3" | The type of mob. See [[Entities#Mobs]]
+
| The type of mob. See [[Entities#Mobs]]
|- class="row3"
+
|-
| class="col0 centeralign" | X
+
| X
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>13366</code>
+
| <code>13366</code>
| class="col3" | The Absolute Integer X Position of the object
+
| The Absolute Integer X Position of the object
|- class="row4"
+
|-
| class="col0 centeralign" | Y
+
| Y
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>2176</code>
+
| <code>2176</code>
| class="col3" | The Absolute Integer Y Position of the object
+
| The Absolute Integer Y Position of the object
|- class="row5"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>1680</code>
+
| <code>1680</code>
| class="col3" | The Absolute Integer Z Position of the object
+
| The Absolute Integer Z Position of the object
|- class="row6"
+
|-
| class="col0 centeralign" | Pitch
+
| Pitch
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" | The pitch in steps of 2p/256
+
| The pitch in steps of 2p/256
|- class="row7"
+
|-
| class="col0 centeralign" | Head Pitch
+
| Head Pitch
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>10</code>
+
| <code>10</code>
| class="col3" | The head pitch in steps of 2p/256
+
| The head pitch in steps of 2p/256
|- class="row8"
+
|-
| class="col0 centeralign" | Yaw
+
| Yaw
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>-27</code>
+
| <code>-27</code>
| class="col3" | Yaw in steps of 2p/256
+
| Yaw in steps of 2p/256
|- class="row9"
+
|-
| class="col0 centeralign" | Velocity X
+
| Velocity X
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" |  
+
|
|- class="row10"
+
|-
| class="col0 centeralign" | Velocity Y
+
| Velocity Y
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" |  
+
|
|- class="row11"
+
|-
| class="col0 centeralign" | Velocity Z
+
| Velocity Z
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" |  
+
|
|- class="row12"
+
|-
| class="col0 centeralign" | Metadata
+
| Metadata
| class="col1 centeralign" | [[Entities#Entity_Metadata_Format|Metadata]]
+
| [[Entities#Entity_Metadata_Format|Metadata]]
| class="col2 centeralign" | <code>0 0 127</code>
+
| <code>0 0 127</code>
| class="col3" | Varies by mob, see [[Entities]]
+
| Varies by mob, see [[Entities]]
|- class="row13"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 27 bytes + Metadata (at least 3 as you must send at least 1 item of metadata)
+
| colspan="4" | 27 bytes + Metadata (at least 3 as you must send at least 1 item of metadata)
 
|}
 
|}
  
Line 1,224: Line 1,223:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="6" | 0x19
+
| rowspan="6" | 0x19
| class="col1 centeralign" | Entity ID
+
| Entity ID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>0x00000326</code>
+
| <code>0x00000326</code>
| class="col4 centeralign" | Unique entity ID
+
| Unique entity ID
|- class="row2"
+
|-
| class="col0 centeralign" | Title
+
| Title
| class="col1 centeralign" | string
+
| string
| class="col2 centeralign" | <code>Creepers</code>
+
| <code>Creepers</code>
| class="col3 centeralign" | Name of the painting; max length 13 (length of "SkullAndRoses")
+
| Name of the painting; max length 13 (length of "SkullAndRoses")
|- class="row3"
+
|-
| class="col0 centeralign" | X
+
| X
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>50</code>
+
| <code>50</code>
| class="col3 centeralign" | Center X coordinate
+
| Center X coordinate
|- class="row4"
+
|-
| class="col0 centeralign" | Y
+
| Y
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>66</code>
+
| <code>66</code>
| class="col3 centeralign" | Center Y coordinate
+
| Center Y coordinate
|- class="row5"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>-50</code>
+
| <code>-50</code>
| class="col3 centeralign" | Center Z coordinate
+
| Center Z coordinate
|- class="row6"
+
|-
| class="col0 centeralign" | Direction
+
| Direction
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3 centeralign" | Direction the painting faces (0 -z, 1 -x, 2 +z, 3 +x)
+
| Direction the painting faces (0 -z, 1 -x, 2 +z, 3 +x)
|- class="row7"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 23 bytes + length of string
+
| colspan="4" | 23 bytes + length of string
|}
+
|}
  
 
Calculating the center of an image: given a (width x height) grid of cells, with (0, 0) being the top left corner, the center is (max(0, width / 2 - 1), height / 2). E.g.
 
Calculating the center of an image: given a (width x height) grid of cells, with (0, 0) being the top left corner, the center is (max(0, width / 2 - 1), height / 2). E.g.
Line 1,281: Line 1,280:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="5" | 0x1A
+
| rowspan="5" | 0x1A
| class="col1 centeralign" | Entity ID
+
| Entity ID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | 105668
+
| 105668
| class="col4" |
+
|
|- class="row2"
+
|-
| class="col1 centeralign" | x
+
| x
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | -1143
+
| -1143
| class="col4" |
+
|
|- class="row3"
+
|-
| class="col1 centeralign" | y
+
| y
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | 1952
+
| 1952
| class="col4" |
+
|
|- class="row4"
+
|-
| class="col1 centeralign" | z
+
| z
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | 1166
+
| 1166
| class="col4" |
+
|
|- class="row5"
+
|-
| class="col1 centeralign" | count
+
| count
| class="col2 centeralign" | short
+
| short
| class="col3 centeralign" | 7
+
| 7
| class="col4" |
+
|
|- class="row4"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 19 bytes
+
| colspan="4" | 19 bytes
 
|}
 
|}
  
Line 1,332: Line 1,331:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="4" | 0x1C
+
| rowspan="4" | 0x1C
| class="col1 centeralign" | Entity ID
+
| Entity ID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>1805</code>
+
| <code>1805</code>
| class="col4" |
+
|
 
The entity ID
 
The entity ID
|- class="row2"
+
|-
| class="col0 centeralign" | Velocity X
+
| Velocity X
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>-1343</code>
+
| <code>-1343</code>
| class="col3" |
+
|
 
Velocity on the X axis
 
Velocity on the X axis
|- class="row3"
+
|-
| class="col0 centeralign" | Velocity Y
+
| Velocity Y
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" |
+
|
 
Velocity on the Y axis
 
Velocity on the Y axis
|- class="row4"
+
|-
| class="col0 centeralign" | Velocity Z
+
| Velocity Z
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" |
+
|
 
Velocity on the Z axis
 
Velocity on the Z axis
|- class="row5"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 11 bytes
+
| colspan="4" | 11 bytes
 
|}
 
|}
  
Line 1,378: Line 1,377:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 " rowspan="2" | 0x1D
+
| rowspan="2" | 0x1D
| class="col1 centeralign" | Entity Count
+
| Entity Count
| class="col2 centeralign" | byte
+
| byte
| class="col3 centeralign" | <code>3</code>
+
| <code>3</code>
| class="col4 centeralign" | The amount of entities which should be destroyed
+
| The amount of entities which should be destroyed
|- class="row21"
+
|-
| class="col0 centeralign" | Entity IDs
+
| Entity IDs
| class="col1 centeralign" | array of int
+
| array of int
| class="col2 centeralign" | <code>452, 546, 123</code>
+
| <code>452, 546, 123</code>
| class="col3 centeralign" | The list of entity ids which should be destroyed
+
| The list of entity ids which should be destroyed
|- class="row32"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 2 + (entity count * 4) bytes
+
| colspan="4" | 2 + (entity count * 4) bytes
 
|}
 
|}
  
Line 1,414: Line 1,413:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" | 0x1E
+
| 0x1E
| class="col1 centeralign" | EID
+
| EID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>446</code>
+
| <code>446</code>
| class="col4 centeralign" | Entity ID
+
| Entity ID
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 5 bytes
+
| colspan="4" | 5 bytes
|}
+
|}
  
  
Line 1,442: Line 1,441:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="4" | 0x1F
+
| rowspan="4" | 0x1F
| class="col1 centeralign" | EID
+
| EID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>459</code>
+
| <code>459</code>
| class="col4" | Entity ID
+
| Entity ID
|- class="row2"
+
|-
| class="col0 centeralign" | dX
+
| dX
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>1</code>
+
| <code>1</code>
| class="col3" | X axis Relative movement as an Absolute Integer
+
| X axis Relative movement as an Absolute Integer
|- class="row3"
+
|-
| class="col0 centeralign" | dY
+
| dY
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>-7</code>
+
| <code>-7</code>
| class="col3" | Y axis Relative movement as an Absolute Integer
+
| Y axis Relative movement as an Absolute Integer
|- class="row4"
+
|-
| class="col0 centeralign" | dZ
+
| dZ
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>5</code>
+
| <code>5</code>
| class="col3" | Z axis Relative movement as an Absolute Integer
+
| Z axis Relative movement as an Absolute Integer
|- class="row5"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 8 bytes
+
| colspan="4" | 8 bytes
 
|}
 
|}
  
Line 1,484: Line 1,483:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="3" | 0x20
+
| rowspan="3" | 0x20
| class="col1 centeralign" | EID
+
| EID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>459</code>
+
| <code>459</code>
| class="col4" | Entity ID
+
| Entity ID
|- class="row2"
+
|-
| class="col0 centeralign" | Yaw
+
| Yaw
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>126</code>
+
| <code>126</code>
| class="col3" | The X Axis rotation as a fraction of 360
+
| The X Axis rotation as a fraction of 360
|- class="row3"
+
|-
| class="col0 centeralign" | Pitch
+
| Pitch
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" | The Y Axis rotation as a fraction of 360
+
| The Y Axis rotation as a fraction of 360
|- class="row4"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 7 bytes
+
| colspan="4" | 7 bytes
 
|}
 
|}
  
Line 1,522: Line 1,521:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="6" | 0x21
+
| rowspan="6" | 0x21
| class="col1 centeralign" | EID
+
| EID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>459</code>
+
| <code>459</code>
| class="col4" | Entity ID
+
| Entity ID
|- class="row2"
+
|-
| class="col0 centeralign" | dX
+
| dX
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>1</code>
+
| <code>1</code>
| class="col3" | X axis Relative movement as an Absolute Integer
+
| X axis Relative movement as an Absolute Integer
|- class="row3"
+
|-
| class="col0 centeralign" | dY
+
| dY
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>-7</code>
+
| <code>-7</code>
| class="col3" | Y axis Relative movement as an Absolute Integer
+
| Y axis Relative movement as an Absolute Integer
|- class="row4"
+
|-
| class="col0 centeralign" | dZ
+
| dZ
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>5</code>
+
| <code>5</code>
| class="col3" | Z axis Relative movement as an Absolute Integer
+
| Z axis Relative movement as an Absolute Integer
|- class="row5"
+
|-
| class="col0 centeralign" | Yaw
+
| Yaw
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>126</code>
+
| <code>126</code>
| class="col3" | The X Axis rotation as a fraction of 360
+
| The X Axis rotation as a fraction of 360
|- class="row6"
+
|-
| class="col0 centeralign" | Pitch
+
| Pitch
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" | The Y Axis rotation as a fraction of 360
+
| The Y Axis rotation as a fraction of 360
|- class="row7"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 10 bytes
+
| colspan="4" | 10 bytes
 
|}
 
|}
  
Line 1,573: Line 1,572:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="6" | 0x22
+
| rowspan="6" | 0x22
| class="col1 centeralign" | EID
+
| EID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>459</code>
+
| <code>459</code>
| class="col4" | Entity ID
+
| Entity ID
|- class="row2"
+
|-
| class="col0 centeralign" | X
+
| X
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>14162</code>
+
| <code>14162</code>
| class="col3" | X axis position as an Absolute Integer
+
| X axis position as an Absolute Integer
|- class="row3"
+
|-
| class="col0 centeralign" | Y
+
| Y
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>2176</code>
+
| <code>2176</code>
| class="col3" | Y axis position as an Absolute Integer
+
| Y axis position as an Absolute Integer
|- class="row4"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>1111</code>
+
| <code>1111</code>
| class="col3" | Z axis position as an Absolute Integer
+
| Z axis position as an Absolute Integer
|- class="row5"
+
|-
| class="col0 centeralign" | Yaw
+
| Yaw
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>126</code>
+
| <code>126</code>
| class="col3" | The X Axis rotation as a fraction of 360
+
| The X Axis rotation as a fraction of 360
|- class="row6"
+
|-
| class="col0 centeralign" | Pitch
+
| Pitch
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" | The Y Axis rotation as a fraction of 360
+
| The Y Axis rotation as a fraction of 360
|- class="row7"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 19 bytes
+
| colspan="4" | 19 bytes
|}
+
|}
 
+
 
  
 
{{anchor|0x23}}
 
{{anchor|0x23}}
Line 1,624: Line 1,623:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="2" | 0x23
+
| rowspan="2" | 0x23
| class="col1 centeralign" | Entity ID
+
| Entity ID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" |  
+
|
| class="col4" |  
+
|
|- class="row2"
+
|-
| class="col0 centeralign" | Head Yaw
+
| Head Yaw
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" |  
+
|
| class="col3" | Head yaw in steps of 2p/256
+
| Head yaw in steps of 2p/256
|- class="row3"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 6 bytes
+
| colspan="4" | 6 bytes
 
|}
 
|}
  
Line 1,653: Line 1,652:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="3" | 0x26
+
| rowspan="3" | 0x26
| class="col1 centeralign" | Entity ID
+
| Entity ID
| class="col2 centeralign" | Int
+
| Int
| class="col3 centeralign" | 34353
+
| 34353
| class="col4" |  
+
|
|- class="row3"
+
|-
| class="col0 centeralign" | Entity Status
+
| Entity Status
| class="col1 centeralign" | Byte
+
| Byte
| class="col2 centeralign" | 0x03
+
| 0x03
| class="col3" | See below
+
| See below
|- class="row4"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 6 bytes
+
| colspan="4" | 6 bytes
 
|}
 
|}
  
Line 1,732: Line 1,731:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="2" | 0x27
+
| rowspan="2" | 0x27
| class="col1 centeralign" | Entity ID
+
| Entity ID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>1298</code>
+
| <code>1298</code>
| class="col4" |
+
|
 
The player entity ID being attached
 
The player entity ID being attached
|- class="row2"
+
|-
| class="col0 centeralign" | Vehicle ID
+
| Vehicle ID
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>1805</code>
+
| <code>1805</code>
| class="col3" |
+
|
 
The vehicle entity ID attached to (-1 for unattaching)
 
The vehicle entity ID attached to (-1 for unattaching)
|- class="row3"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 9 bytes
+
| colspan="4" | 9 bytes
 
|}
 
|}
  
Line 1,764: Line 1,763:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="2" | 0x28
+
| rowspan="2" | 0x28
| class="col1 centeralign" | Entity ID
+
| Entity ID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>0x00000326</code>
+
| <code>0x00000326</code>
| class="col4 centeralign" | Unique entity ID to update.
+
| Unique entity ID to update.
|- class="row2"
+
|-
| class="col0 centeralign" | Entity Metadata
+
| Entity Metadata
| class="col1 centeralign" | [[Entities#Entity_Metadata_Format|Metadata]]
+
| [[Entities#Entity_Metadata_Format|Metadata]]
| class="col2 centeralign" | <code>0x00 0x01 0x7F</code>
+
| <code>0x00 0x01 0x7F</code>
| class="col3 centeralign" | Metadata varies by entity. See [[Entities]]
+
| Metadata varies by entity. See [[Entities]]
|- class="row3"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 5 bytes + Metadata
+
| colspan="4" | 5 bytes + Metadata
 
|}
 
|}
  
Line 1,794: Line 1,793:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="4" | 0x29
+
| rowspan="4" | 0x29
| class="col1 centeralign" | Entity ID
+
| Entity ID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>14</code>
+
| <code>14</code>
| class="col4" | Entity ID of a player
+
| Entity ID of a player
|- class="row2"
+
|-
| class="col0 centeralign" | Effect ID
+
| Effect ID
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>17</code>
+
| <code>17</code>
| class="col3" | See [http://www.minecraftwiki.net/wiki/Potion_effect#Parameters here]
+
| See [http://www.minecraftwiki.net/wiki/Potion_effect#Parameters here]
|- class="row3"
+
|-
| class="col0 centeralign" | Amplifier
+
| Amplifier
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" |
+
|
|- class="row4"
+
|-
| class="col0 centeralign" | Duration
+
| Duration
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>64</code>
+
| <code>64</code>
| class="col3" |
+
|
|- class="row5"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 9 bytes
+
| colspan="4" | 9 bytes
|}
+
|}
 
+
 
  
 
{{anchor|0x2A}}
 
{{anchor|0x2A}}
Line 1,834: Line 1,833:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="2" | 0x2a
+
| rowspan="2" | 0x2a
| class="col1 centeralign" | Entity ID
+
| Entity ID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" |  
+
|
| class="col4" | Entity ID of a player
+
| Entity ID of a player
|- class="row2"
+
|-
| class="col0 centeralign" | Effect ID
+
| Effect ID
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>17</code>
+
| <code>17</code>
| class="col3" | See [http://www.minecraftwiki.net/wiki/Potion_effect#Parameters here]
+
| See [http://www.minecraftwiki.net/wiki/Potion_effect#Parameters here]
|- class="row3"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 6 bytes
+
| colspan="4" | 6 bytes
 
|}
 
|}
  
Line 1,866: Line 1,865:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="3" | 0x2B
+
| rowspan="3" | 0x2B
| class="col1 centeralign" | Experience bar
+
| Experience bar
| class="col2 centeralign" | float
+
| float
| class="col3 centeralign" | <code>0.5960060358047485</code>
+
| <code>0.5960060358047485</code>
| class="col4" | Used for drawing the experience bar - value is between 0 and 1.
+
| Used for drawing the experience bar - value is between 0 and 1.
|- class="row2"
+
|-
| class="col0 centeralign" | Level
+
| Level
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>8</code>
+
| <code>8</code>
| class="col4" |
+
|
|- class="row3"
+
|-
| class="col0 centeralign" | Total experience
+
| Total experience
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>130</code>
+
| <code>130</code>
| class="col3" |
+
|
|- class="row4"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 9 bytes
+
| colspan="4" | 9 bytes
 
|}
 
|}
  
Line 1,903: Line 1,902:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="7" | 0x33
+
| rowspan="7" | 0x33
| class="col1 centeralign" | X
+
| X
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" |  
+
|
| class="col4" | Chunk X Coordinate (*16 to get true X)
+
| Chunk X Coordinate (*16 to get true X)
|- class="row2"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" |
+
|
| class="col3" | Chunk Z Coordinate (*16 to get true Z)
+
| Chunk Z Coordinate (*16 to get true Z)
|- class="row3"
+
|-
| class="col0 centeralign" | Ground-up continuous
+
| Ground-up continuous
| class="col1 centeralign" | boolean
+
| boolean
| class="col2 centeralign" |  
+
|
| class="col3" | This is True if the packet represents all sections in this vertical column, where the primary bit map specifies exactly which sections are included, and which are air.
+
| This is True if the packet represents all sections in this vertical column, where the primary bit map specifies exactly which sections are included, and which are air.
|- class="row4"
+
|-
| class="col0 centeralign" | Primary bit map
+
| Primary bit map
| class="col1 centeralign" | unsigned short
+
| unsigned short
| class="col2 centeralign" | 15
+
| 15
| class="col3" | Bitmask with 1 for every 16x16x16 section which data follows in the compressed data.
+
| Bitmask with 1 for every 16x16x16 section which data follows in the compressed data.
|- class="row5"
+
|-
| class="col0 centeralign" | Add bit map
+
| Add bit map
| class="col1 centeralign" | unsigned short
+
| unsigned short
| class="col2 centeralign" | 0
+
| 0
| class="col3" | Same as above, but this is used exclusively for the 'add' portion of the payload
+
| Same as above, but this is used exclusively for the 'add' portion of the payload
|- class="row6"
+
|-
| class="col0 centeralign" | Compressed size
+
| Compressed size
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" |  
+
|
| class="col3" | Size of compressed chunk data.
+
| Size of compressed chunk data.
|- class="row78"
+
|-
| class="col0 centeralign" | Compressed data
+
| Compressed data
| class="col1 centeralign" | unsigned byte array
+
| unsigned byte array
| class="col2 centeralign" | <code>…</code>
+
| <code>…</code>
| class="col3" | The chunk data is compressed using ZLib Deflate function.
+
| The chunk data is compressed using ZLib Deflate function.
|- class="row8"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 18 bytes + Compressed chunk size
+
| colspan="4" | 18 bytes + Compressed chunk size
 
|}
 
|}
  
Line 1,958: Line 1,957:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="5" | 0x34
+
| rowspan="5" | 0x34
| class="col1 centeralign" | Chunk X
+
| Chunk X
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>-9</code>
+
| <code>-9</code>
| class="col4" | Chunk X Coordinate
+
| Chunk X Coordinate
|- class="row2"
+
|-
| class="col0 centeralign" | Chunk Z
+
| Chunk Z
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>12</code>
+
| <code>12</code>
| class="col3" | Chunk Z Coordinate
+
| Chunk Z Coordinate
|- class="row3"
+
|-
| class="col0 centeralign" | Record count
+
| Record count
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" |  
+
|
| class="col3" | The number of blocks affected
+
| The number of blocks affected
|- class="row2"
+
|-
| class="col0 centeralign" | Data size
+
| Data size
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" |  
+
|
| class="col3" | The total size of the data, in bytes. Should always be 4*record count - please confirm.
+
| The total size of the data, in bytes. Should always be 4*record count - please confirm.
|- class="row4"
+
|-
| class="col0 centeralign" | Data
+
| Data
| class="col1 centeralign" |  
+
|
| class="col2 centeralign" | <code>…</code>
+
| <code>…</code>
| class="col3" | Coordinates, type, and metadata of blocks to change (see below table).
+
| Coordinates, type, and metadata of blocks to change (see below table).
|- class="row5"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 15 bytes + Arrays
+
| colspan="4" | 15 bytes + Arrays
 
|}
 
|}
  
Line 1,998: Line 1,997:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Bit mask
+
| Bit mask
| class="col1" | Width
+
| Width
| class="col2" | Meaning
+
| Meaning
|- class="row1"
+
|-
| class="col0" | 00 00 00 0F
+
| 00 00 00 0F
| class="col1" | 4 bits
+
| 4 bits
| class="col2" | Block metadata
+
| Block metadata
|- class="row2"
+
|-
| class="col0" | 00 00 FF F0
+
| 00 00 FF F0
| class="col1" | 12 bits
+
| 12 bits
| class="col2" | Block ID
+
| Block ID
|- class="row3"
+
|-
| class="col0" | 00 FF 00 00
+
| 00 FF 00 00
| class="col1" | 8 bits
+
| 8 bits
| class="col2" | Y co-ordinate
+
| Y co-ordinate
|- class="row4"
+
|-
| class="col0" | 0F 00 00 00
+
| 0F 00 00 00
| class="col1" | 4 bits
+
| 4 bits
| class="col2" | Z co-ordinate, relative to chunk
+
| Z co-ordinate, relative to chunk
|- class="row5"
+
|-
| class="col0" | F0 00 00 00
+
| F0 00 00 00
| class="col1" | 4 bits
+
| 4 bits
| class="col2" | X co-ordinate, relative to chunk
+
| X co-ordinate, relative to chunk
 
|}
 
|}
  
Line 2,032: Line 2,031:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="5" | 0x35
+
| rowspan="5" | 0x35
| class="col1 centeralign" | X
+
| X
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>502</code>
+
| <code>502</code>
| class="col4" | Block X Coordinate
+
| Block X Coordinate
|- class="row2"
+
|-
| class="col0 centeralign" | Y
+
| Y
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>71</code>
+
| <code>71</code>
| class="col3" | Block Y Coordinate
+
| Block Y Coordinate
|- class="row3"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>18</code>
+
| <code>18</code>
| class="col3" | Block Z Coordinate
+
| Block Z Coordinate
|- class="row4"
+
|-
| class="col0 centeralign" | Block Type
+
| Block Type
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>78</code>
+
| <code>78</code>
| class="col3" | The new block type for the block
+
| The new block type for the block
|- class="row5"
+
|-
| class="col0 centeralign" | Block Metadata
+
| Block Metadata
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" | The new Metadata for the block
+
| The new Metadata for the block
|- class="row6"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 13 bytes
+
| colspan="4" | 13 bytes
 
|}
 
|}
  
Line 2,080: Line 2,079:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="6" | 0x36
+
| rowspan="6" | 0x36
| class="col1 centeralign" | X
+
| X
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | <code>502</code>
+
| <code>502</code>
| class="col4" | Block X Coordinate
+
| Block X Coordinate
|- class="row2"
+
|-
| class="col0 centeralign" | Y
+
| Y
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>71</code>
+
| <code>71</code>
| class="col3" | Block Y Coordinate
+
| Block Y Coordinate
|- class="row3"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | <code>18</code>
+
| <code>18</code>
| class="col3" | Block Z Coordinate
+
| Block Z Coordinate
|- class="row4"
+
|-
| class="col0 centeralign" | Byte 1
+
| Byte 1
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>3</code>
+
| <code>3</code>
| class="col3" | Varies depending on block - see below
+
| Varies depending on block - see below
|- class="row5"
+
|-
| class="col0 centeralign" | Byte 2
+
| Byte 2
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | <code>17</code>
+
| <code>17</code>
| class="col3" | Varies depending on block - see below
+
| Varies depending on block - see below
|- class="row6"
+
|-
| class="col0 centeralign" | Block ID
+
| Block ID
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>29</code>
+
| <code>29</code>
| class="col3" | The block id this action is set for
+
| The block id this action is set for
|- class="row7"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 15 bytes
+
| colspan="4" | 15 bytes
 
|}
 
|}
 
See Also: [[Block Actions]]  
 
See Also: [[Block Actions]]  
Line 2,130: Line 2,129:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=5 | 0x37
+
| rowspan=5 | 0x37
| class="col1 centeralign" | EID?
+
| EID?
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" |  
+
|
| class="col4" | Entity breaking the block?
+
| Entity breaking the block?
|- class="row2"
+
|-
| class="col0 centeralign" | X
+
| X
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" |  
+
|
| class="col3" rowspan=3 | Block position
+
| rowspan=3 | Block position
|- class="row2"
+
|-
| class="col0 centeralign" | Y
+
| Y
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" |  
+
|
|- class="row2"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" |  
+
|
|- class="row3"
+
|-
| class="col0 centeralign" | Destroy Stage
+
| Destroy Stage
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 1
+
| 1
| class="col3" | How far destroyed this block is.
+
| How far destroyed this block is.
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 18 bytes
+
| colspan="4" | 18 bytes
 
|}
 
|}
  
Line 2,175: Line 2,174:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=5 | 0x38
+
| rowspan=5 | 0x38
| class="col1 centeralign" | Chunk column count
+
| Chunk column count
| class="col2 centeralign" | short
+
| short
| class="col3 centeralign" |  
+
|
| class="col4" | The number of chunks in this packet
+
| The number of chunks in this packet
|- class="row2"
+
|-
| class="col0 centeralign" | Data length
+
| Data length
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" |  
+
|
| class="col3" | the size of the data field
+
| the size of the data field
|- class="row2"
+
|-
| class="col0 centeralign" | Sky light sent
+
| Sky light sent
| class="col1 centeralign" | boolean
+
| boolean
| class="col2 centeralign" |  
+
|
| class="col3" | Whether or not the chunk data contains a light nibble array. This is true in the main world, false in the end + nether
+
| Whether or not the chunk data contains a light nibble array. This is true in the main world, false in the end + nether
|- class="row3"
+
|-
| class="col0 centeralign" | Data
+
| Data
| class="col1 centeralign" | byte array
+
| byte array
| class="col2 centeralign" |  
+
|
| class="col3" | Compressed chunk data
+
| Compressed chunk data
|- class="row4"
+
|-
| class="col0 centeralign" | Meta information
+
| Meta information
| class="col1 centeralign" | see below
+
| see below
| class="col2 centeralign" |
+
|
| class="col3 centeralign" | see below
+
| see below
|- class="row5"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 8 + (Chunk data size) + 12 * (Chunk Count) bytes
+
| colspan="4" | 8 + (Chunk data size) + 12 * (Chunk Count) bytes
 
|}
 
|}
  
Line 2,217: Line 2,216:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col1 centeralign" | Chunk X
+
| Chunk X
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | 10
+
| 10
| class="col4" | The X coordinate of the specific chunk
+
| The X coordinate of the specific chunk
|- class="row2"
+
|-
| class="col1 centeralign" | Chunk Z
+
| Chunk Z
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | 10
+
| 10
| class="col4" | The Z coordinate of the specific chunk
+
| The Z coordinate of the specific chunk
|- class="row3"
+
|-
| class="col1 centeralign" | Primary bitmap
+
| Primary bitmap
| class="col2 centeralign" | unsigned short
+
| unsigned short
| class="col3 centeralign" | 15
+
| 15
| class="col4" | A bitmap which specifies which sections are not empty in this chunk
+
| A bitmap which specifies which sections are not empty in this chunk
|- class="row4"
+
|-
| class="col1 centeralign" | Add bitmap
+
| Add bitmap
| class="col2 centeralign" | unsigned short
+
| unsigned short
| class="col3 centeralign" | 0
+
| 0
| class="col4" | A bitmap which specifies which sections need add information because of very high block ids. not yet used. needs verification
+
| A bitmap which specifies which sections need add information because of very high block ids. not yet used. needs verification
|- class="row5"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="3" | 12 bytes
+
| colspan="3" | 12 bytes
 
|}
 
|}
  
Line 2,254: Line 2,253:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=9 | 0x3C
+
| rowspan=9 | 0x3C
| class="col1 centeralign" | X
+
| X
| class="col2 centeralign" | double
+
| double
| class="col3 centeralign" |  
+
|
| class="col4" |  
+
|
|- class="row1"
+
|-
| class="col0 centeralign" | Y
+
| Y
| class="col1 centeralign" | double
+
| double
| class="col2 centeralign" |  
+
|
| class="col3" |  
+
|
|- class="row1"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | double
+
| double
| class="col2 centeralign" |  
+
|
| class="col3" |  
+
|
|- class="row1"
+
|-
| class="col0 centeralign" | Radius
+
| Radius
| class="col1 centeralign" | float
+
| float
| class="col2 centeralign" | 3.0
+
| 3.0
| class="col3" | Currently unused in the client
+
| Currently unused in the client
|- class="row2"
+
|-
| class="col0 centeralign" | Record count
+
| Record count
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" |  
+
|
| class="col3" | This is the count, not the size. The size is 3 times this value.
+
| This is the count, not the size. The size is 3 times this value.
|- class="row3"
+
|-
| class="col0 centeralign" | Records
+
| Records
| class="col1 centeralign" | (byte, byte, byte) × count
+
| (byte, byte, byte) × count
| class="col2 centeralign" |  
+
|
| class="col3" | Each record is 3 signed bytes long, each bytes are the XYZ (respectively) offsets of affected blocks.
+
| Each record is 3 signed bytes long, each bytes are the XYZ (respectively) offsets of affected blocks.
|- class="row4"
+
|-
| class="col0 centeralign" | Player Motion X
+
| Player Motion X
| class="col1 centeralign" | float
+
| float
| class="col2 centeralign" |
+
|
| class="col3" | X velocity of the player being pushed by the explosion
+
| X velocity of the player being pushed by the explosion
|- class="row5"
+
|-
| class="col0 centeralign" | Player Motion Y
+
| Player Motion Y
| class="col1 centeralign" | float
+
| float
| class="col2 centeralign" |
+
|
| class="col3" | Y velocity of the player being pushed by the explosion
+
| Y velocity of the player being pushed by the explosion
|- class="row6"
+
|-
| class="col0 centeralign" | Player Motion Z
+
| Player Motion Z
| class="col1 centeralign" | float
+
| float
| class="col2 centeralign" |
+
|
| class="col3" | Z velocity of the player being pushed by the explosion
+
| Z velocity of the player being pushed by the explosion
|- class="row7"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 45 bytes + 3*(Record count) bytes
+
| colspan="4" | 45 bytes + 3*(Record count) bytes
|}
+
|}
  
 
Each block in Records is set to air. Coordinates for each axis in record is int(X) + record.x
 
Each block in Records is set to air. Coordinates for each axis in record is int(X) + record.x
Line 2,324: Line 2,323:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=6 | 0x3D
+
| rowspan=6 | 0x3D
| class="col1 centeralign" | Effect ID
+
| Effect ID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | 1003
+
| 1003
| class="col4" | The ID of the effect, see below.
+
| The ID of the effect, see below.
|- class="row1"
+
|-
| class="col1 centeralign" | X
+
| X
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" |  
+
|
| class="col4" | The X location of the effect.
+
| The X location of the effect.
|- class="row1"
+
|-
| class="col1 centeralign" | Y
+
| Y
| class="col2 centeralign" | byte
+
| byte
| class="col3 centeralign" |  
+
|
| class="col4" | The Y location of the effect.
+
| The Y location of the effect.
|- class="row1"
+
|-
| class="col1 centeralign" | Z
+
| Z
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" |  
+
|
| class="col4" | The Z location of the effect.
+
| The Z location of the effect.
|- class="row2"
+
|-
| class="col1 centeralign" | Data
+
| Data
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | 0
+
| 0
| class="col4" | Extra data for certain effects, see below.
+
| Extra data for certain effects, see below.
|- class="row4"
+
|-
| class="col1 centeralign" | Disable relative volume
+
| Disable relative volume
| class="col2 centeralign" | boolean
+
| boolean
| class="col3 centeralign" | false
+
| false
| class="col4 centeralign" | See above
+
| See above
|- class="row5"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 19 bytes
+
| colspan="4" | 19 bytes
 
|}
 
|}
  
Line 2,396: Line 2,395:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | ID
+
| ID
| class="col1" | Direction
+
| Direction
|- class="row1"
+
|-
| class="col0" | 0
+
| 0
| class="col1" | South - East
+
| South - East
|- class="row2"
+
|-
| class="col0" | 1
+
| 1
| class="col1" | South
+
| South
|- class="row3"
+
|-
| class="col0" | 2
+
| 2
| class="col1" | South - West
+
| South - West
|- class="row4"
+
|-
| class="col0" | 3
+
| 3
| class="col1" | East
+
| East
|- class="row5"
+
|-
| class="col0" | 4
+
| 4
| class="col1" | (Up or middle ?)
+
| (Up or middle ?)
|- class="row6"
+
|-
| class="col0" | 5
+
| 5
| class="col1" | West
+
| West
|- class="row7"
+
|-
| class="col0" | 6
+
| 6
| class="col1" | North - East
+
| North - East
|- class="row8"
+
|-
| class="col0" | 7
+
| 7
| class="col1" | North
+
| North
|- class="row9"
+
|-
| class="col0" | 8
+
| 8
| class="col1" | North - West
+
| North - West
|}
+
|}
 
+
 
{{anchor|0x3E}}
+
{{anchor|0x3E}}
  
 
=== Named Sound Effect (0x3E) ===
 
=== Named Sound Effect (0x3E) ===
Line 2,439: Line 2,438:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="6" | 0x3E
+
| rowspan="6" | 0x3E
| class="col1 centeralign" | Sound name
+
| Sound name
| class="col2 centeralign" | string
+
| string
| class="col3 centeralign" | step.grass
+
| step.grass
| class="col4 centeralign" | 250
+
| 250
|- class="row2"
+
|-
| class="col0 centeralign" | Effect position X
+
| Effect position X
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | 250
+
| 250
| class="col3 centeralign" | effect X multiplied by 8
+
| effect X multiplied by 8
|- class="row3"
+
|-
| class="col0 centeralign" | Effect position Y
+
| Effect position Y
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | 250
+
| 250
| class="col3 centeralign" | effect Y multiplied by 8
+
| effect Y multiplied by 8
|- class="row4"
+
|-
| class="col0 centeralign" | Effect position Z
+
| Effect position Z
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | 250
+
| 250
| class="col3 centeralign" | effect Z multiplied by 8
+
| effect Z multiplied by 8
|- class="row5"
+
|-
| class="col0 centeralign" | Volume
+
| Volume
| class="col1 centeralign" | float
+
| float
| class="col2 centeralign" | 9
+
| 9
| class="col3 centeralign" | 1 is 100%, can be more
+
| 1 is 100%, can be more
|- class="row6"
+
|-
| class="col0 centeralign" | Pitch
+
| Pitch
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 1
+
| 1
| class="col3 centeralign" | 63 is 100%, can be more
+
| 63 is 100%, can be more
|- class="row7"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 20 bytes + length of string
+
| colspan="4" | 20 bytes + length of string
|}
 
 
 
{{anchor|0x3F}}
 
 
 
=== Particle (0x3F) ===
 
 
 
''Server to Client''
 
 
 
This displays the named particle
 
 
 
{| class="wikitable"
 
|- class="row0"
 
| class="col0" | Packet ID
 
| class="col1" | Field Name
 
| class="col2" | Field Type
 
| class="col3" | Example
 
| class="col4" | Notes
 
|- class="row1"
 
| class="col0 centeralign" rowspan=9 | 0x3F
 
| class="col1 centeralign" | Particle name
 
| class="col2 centeralign" | string
 
| class="col3 centeralign" | <code>hugeexplosion</code>
 
| class="col4" | The name of the particle to create. A list can be found [https://gist.github.com/thinkofdeath/5110835 here]
 
|- class="row2"
 
| class="col0 centeralign" | X
 
| class="col1 centeralign" | float
 
| class="col2 centeralign" | 0
 
| class="col3" | X position of the particle
 
|- class="row3"
 
| class="col0 centeralign" | Y
 
| class="col1 centeralign" | float
 
| class="col2 centeralign" | 0
 
| class="col3" | Y position of the particle
 
|- class="row4"
 
| class="col0 centeralign" | Z
 
| class="col1 centeralign" | float
 
| class="col2 centeralign" | 0
 
| class="col3" | Z position of the particle
 
|- class="row5"
 
| class="col0 centeralign" | Offset X
 
| class="col1 centeralign" | float
 
| class="col2 centeralign" | 0
 
| class="col3" | This is added to the X position after being multiplied by random.nextGaussian()
 
|- class="row6"
 
| class="col0 centeralign" | Offset Y
 
| class="col1 centeralign" | float
 
| class="col2 centeralign" | 0
 
| class="col3" | This is added to the Y position after being multiplied by random.nextGaussian()
 
|- class="row7"
 
| class="col0 centeralign" | Offset Z
 
| class="col1 centeralign" | float
 
| class="col2 centeralign" | 0
 
| class="col3" | This is added to the Z position after being multiplied by random.nextGaussian()
 
|- class="row4"
 
| class="col0 centeralign" | Particle speed
 
| class="col1 centeralign" | float
 
| class="col2 centeralign" | 0
 
| class="col3" | The speed of each particle
 
|- class="row4"
 
| class="col0 centeralign" | Number of particles
 
| class="col1 centeralign" | int
 
| class="col2 centeralign" | 0
 
| class="col3" | The number of particles to create
 
|- class="row8"
 
| class="col0" | Total Size:
 
| class="col1 rightalign" colspan="4" | 34 bytes + length of string
 
 
|}
 
|}
  
{{anchor|0x46}}
+
{{anchor|0x3F}}
  
=== Change Game State (0x46) ===
+
=== Particle (0x3F) ===
  
 
''Server to Client''
 
''Server to Client''
  
This packet appeared with protocol version 10. Currently, it appears when a bed can't be used as a spawn point and when the rain state changes.  it could have additional uses in the future.
+
This displays the named particle
 
 
The class has an array of strings linked to reason codes 0, 1, 2, and 3 but only the codes for 1 and 2 are null.
 
 
 
{| class="wikitable"
 
|- class="row0"
 
| class="col0" | Packet ID
 
| class="col1" | Field Name
 
| class="col2" | Field Type
 
| class="col3" | Example
 
| class="col4" | Notes
 
|- class="row1"
 
| class="col0 centeralign" rowspan="2" | 0x46
 
| class="col1 centeralign" | Reason
 
| class="col2 centeralign" | byte
 
| class="col3 centeralign" | 0
 
| class="col4" |
 
|- class="row2"
 
| class="col0 centeralign" | Game mode
 
| class="col1 centeralign" | byte
 
| class="col2 centeralign" | 0
 
| class="col3" | Used only when reason = 3. 0 is survival, 1 is creative.
 
|- class="row3"
 
| class="col0" | Total Size:
 
| class="col1 rightalign" colspan="4" | 3 bytes
 
|}
 
 
 
'''Reason codes'''
 
  
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
! Code
+
| Packet ID
! Effect
+
| Field Name
! Text
+
| Field Type
 +
| Example
 +
| Notes
 +
|-
 +
| rowspan=9 | 0x3F
 +
| Particle name
 +
| string
 +
| <code>hugeexplosion</code>
 +
| The name of the particle to create. A list can be found [https://gist.github.com/thinkofdeath/5110835 here]
 +
|-
 +
| X
 +
| float
 +
| 0
 +
| X position of the particle
 +
|-
 +
| Y
 +
| float
 +
| 0
 +
| Y position of the particle
 +
|-
 +
| Z
 +
| float
 +
| 0
 +
| Z position of the particle
 +
|-
 +
| Offset X
 +
| float
 +
| 0
 +
| This is added to the X position after being multiplied by random.nextGaussian()
 
|-
 
|-
 +
| Offset Y
 +
| float
 
| 0
 
| 0
| Invalid Bed
+
| This is added to the Y position after being multiplied by random.nextGaussian()
| "tile.bed.notValid"
 
 
|-
 
|-
| 1
+
| Offset Z
| Begin raining
+
| float
| null
+
| 0
 +
| This is added to the Z position after being multiplied by random.nextGaussian()
 
|-
 
|-
| 2
+
| Particle speed
| End raining
+
| float
| null
+
| 0
 +
| The speed of each particle
 
|-
 
|-
| 3
+
| Number of particles
| Change game mode
+
| int
| gameMode.changed
+
| 0
 +
| The number of particles to create
 
|-
 
|-
| 4
+
| Total Size:
| Enter credits
+
| colspan="4" | 34 bytes + length of string
|  
 
 
|}
 
|}
  
 +
{{anchor|0x46}}
  
{{anchor|0x47}}
+
=== Change Game State (0x46) ===
=== Spawn Global Entity (0x47) ===
 
  
 
''Server to Client''
 
''Server to Client''
  
With this packet, the server notifies the client of thunderbolts striking within a 512 block radius around the player. The coordinates specify where exactly the thunderbolt strikes.
+
This packet appeared with protocol version 10. Currently, it appears when a bed can't be used as a spawn point and when the rain state changes.  it could have additional uses in the future.
 +
 
 +
The class has an array of strings linked to reason codes 0, 1, 2, and 3 but only the codes for 1 and 2 are null.
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=5 | 0x47
+
| rowspan="2" | 0x46
| class="col1 centeralign" | Entity ID
+
| Reason
| class="col2 centeralign" | int
+
| byte
| class="col3 centeralign" | 4
+
| 0
| class="col4" | The entity ID of the thunderbolt
+
|
|- class="row1"
+
|-
| class="col0 centeralign" | Type
+
| Game mode
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 1
+
| 0
| class="col3" | The global entity type, currently always 1 for thunderbolt.
+
| Used only when reason = 3. 0 is survival, 1 is creative.
|- class="row1"
+
|-
| class="col0 centeralign" | X
+
| Total Size:
| class="col1 centeralign" | int
+
| colspan="4" | 3 bytes
| class="col2 centeralign" | 133
 
| class="col3" | Thunderbolt X as Absolute Integer
 
|- class="row1"
 
| class="col0 centeralign" | Y
 
| class="col1 centeralign" | int
 
| class="col2 centeralign" | 913
 
| class="col3" | Thunderbolt Y as Absolute Integer
 
|- class="row1"
 
| class="col0 centeralign" | Z
 
| class="col1 centeralign" | int
 
| class="col2 centeralign" | 63552
 
| class="col3" | Thunderbolt Z as Absolute Integer
 
|- class="row2"
 
| class="col0" | Total Size:
 
| class="col1 rightalign" colspan="4" | 18 bytes
 
 
|}
 
|}
  
 
+
'''Reason codes'''
{{anchor|0x64}}
 
 
 
=== Open Window (0x64) ===
 
 
 
''Server to Client''
 
 
 
This is sent to the client when it should open an inventory, such as a chest, workbench, or furnace. This message is not sent anywhere for clients opening their own inventory.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
! Code
| class="col1" | Field Name
+
! Effect
| class="col2" | Field Type
+
! Text
| class="col3" | Example
+
|-
| class="col4" | Notes
+
| 0
|- class="row1"
+
| Invalid Bed
| class="col0 centeralign" rowspan=5 | 0x64
+
| "tile.bed.notValid"
| class="col1 centeralign" | Window id
+
|-
| class="col2 centeralign" | byte
+
| 1
| class="col3 centeralign" | 123
+
| Begin raining
| class="col4" | A unique id number for the window to be displayed. Notchian server implementation is a counter, starting at 1.
+
| null
|- class="row1"
+
|-
| class="col0 centeralign" | Inventory Type
+
| 2
| class="col1 centeralign" | byte
+
| End raining
| class="col2 centeralign" | 2
+
| null
| class="col3" | The window type to use for display.  Check below
+
|-
|- class="row1"
+
| 3
| class="col0 centeralign" | Window title
+
| Change game mode
| class="col1 centeralign" | string
+
| gameMode.changed
| class="col2 centeralign" | <code>Chest</code>
+
|-
| class="col3" | The title of the window.
+
| 4
|- class="row1"
+
| Enter credits
| class="col0 centeralign" | Number of Slots
+
|
| class="col1 centeralign" | byte
+
|}
| class="col2 centeralign" | 3
 
| class="col3" | Number of slots in the window (excluding the number of slots in the player inventory).
 
|- class="row1"
 
| class="col0 centeralign" | Use provided window title
 
| class="col1 centeralign" | boolean
 
| class="col2 centeralign" | 1
 
| class="col3" | If false, the client will look up a string like "window.minecart". If true, the client uses what the server provides.
 
|- class="row2"
 
| class="col0" | Total Size:
 
| class="col1 rightalign" colspan="4" | 7 bytes + length of string
 
|}
 
 
 
See [[Inventory#Windows|inventory windows]] for further information.
 
  
{{anchor|0x65}}
 
  
=== Close Window (0x65) ===
+
{{anchor|0x47}}
 +
=== Spawn Global Entity (0x47) ===
  
''Two-Way''
+
''Server to Client''
  
This packet is sent by the client when closing a window. This packet is sent from the server to the client when a window is forcibly closed, such as when a chest is destroyed while it's open.
+
With this packet, the server notifies the client of thunderbolts striking within a 512 block radius around the player. The coordinates specify where exactly the thunderbolt strikes.
 
 
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 inventory.  
 
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" | 0x65
+
| rowspan=5 | 0x47
| class="col1 centeralign" | Window id
+
| Entity ID
| class="col2 centeralign" | byte
+
| int
| class="col3 centeralign" | 0
+
| 4
| class="col4" | This is the id of the window that was closed. 0 for inventory.
+
| The entity ID of the thunderbolt
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Type
| class="col1 rightalign" colspan="4" | 2 bytes
+
| byte
 +
| 1
 +
| The global entity type, currently always 1 for thunderbolt.
 +
|-
 +
| X
 +
| int
 +
| 133
 +
| Thunderbolt X as Absolute Integer
 +
|-
 +
| Y
 +
| int
 +
| 913
 +
| Thunderbolt Y as Absolute Integer
 +
|-
 +
| Z
 +
| int
 +
| 63552
 +
| Thunderbolt Z as Absolute Integer
 +
|-
 +
| Total Size:
 +
| colspan="4" | 18 bytes
 
|}
 
|}
  
  
{{anchor|0x66}}
+
{{anchor|0x64}}
=== Click Window (0x66) ===
+
 
 +
=== Open Window (0x64) ===
  
''Client to Server''
+
''Server to Client''
  
This packet is sent by the player when it clicks on a slot in a window.
+
This is sent to the client when it should open an inventory, such as a chest, workbench, or furnace. This message is not sent anywhere for clients opening their own inventory.
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=6 | 0x66
+
| rowspan=5 | 0x64
| class="col1 centeralign" | Window id
+
| Window id
| class="col2 centeralign" | byte
+
| byte
| class="col3 centeralign" | <code>0</code>
+
| 123
| class="col4" | The id of the window which was clicked. 0 for player inventory.
+
| A unique id number for the window to be displayed. Notchian server implementation is a counter, starting at 1.
|- class="row2"
+
|-
| class="col0 centeralign" | Slot
+
| Inventory Type
| class="col1 centeralign" | short
+
| byte
| class="col2 centeralign" | <code>36</code>
+
| 2
| class="col3" | The clicked slot. See below.
+
| The window type to use for display. Check below
|- class="row3"
+
|-
| class="col0 centeralign" | Button
+
| Window title
| class="col1 centeralign" | byte
+
| string
| class="col2 centeralign" | <code>1</code>
+
| <code>Chest</code>
| class="col3" | The button used in the click. See below.
+
| The title of the window.
|- class="row4"
+
|-
| class="col0 centeralign" | Action number
+
| Number of Slots
| class="col1 centeralign" | short
+
| byte
| class="col2 centeralign" | <code>12</code>
+
| 3
| class="col3" | A unique number for the action, used for transaction handling (See the Transaction packet).
+
| Number of slots in the window (excluding the number of slots in the player inventory).
|- class="row5"
+
|-
| class="col0 centeralign" | Mode
+
| Use provided window title
| class="col1 centeralign" | byte
+
| boolean
| class="col2 centeralign" | <code>1</code>
+
| 1
| class="col3" | Inventory operation mode. See below.
+
| If false, the client will look up a string like "window.minecart". If true, the client uses what the server provides.
|- class="row6"
+
|-
| class="col0 centeralign" | Clicked item
+
| Total Size:
| class="col1 centeralign" | [[Slot_Data|slot]]
+
| colspan="4" | 7 bytes + length of string
| class="col2 centeralign" |
+
|}
| class="col3" |
+
 
|- class="row7"
+
See [[Inventory#Windows|inventory windows]] for further information.
| class="col0" | Total Size:
+
 
| class="col1 rightalign" colspan="4" | 8 bytes + slot data
+
{{anchor|0x65}}
|}
+
 
 
+
=== Close Window (0x65) ===
See [[Inventory#Windows|inventory windows]] for further information about how slots are indexed.
+
 
 +
''Two-Way''
  
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.
+
This packet is sent by the client when closing a window. This packet is sent from the server to the client when a window is forcibly closed, such as when a chest is destroyed while it's open.
  
The Action number is actually a counter, starting at 1.  This number is used by the server as a transaction ID to send back a [[#0x6A|Transaction packet]].
+
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 inventory.  
  
The distinct type of click performed by the client is determined by the combination of the "Mode" and "Button" fields.
 
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
! Mode
+
| Packet ID
! Button
+
| Field Name
! Slot
+
| Field Type
! Trigger
+
| Example
 +
| Notes
 
|-
 
|-
! rowspan=2 | 0
+
| 0x65
 +
| Window id
 +
| byte
 
| 0
 
| 0
| N/A
+
| This is the id of the window that was closed. 0 for inventory.
| Left mouse click
+
|-
 +
| Total Size:
 +
| colspan="4" | 2 bytes
 +
|}
 +
 
 +
 
 +
{{anchor|0x66}}
 +
=== Click Window (0x66) ===
 +
 
 +
''Client to Server''
 +
 
 +
This packet is sent by the player when it clicks on a slot in a window.
 +
 
 +
{| class="wikitable"
 +
|-
 +
| Packet ID
 +
| Field Name
 +
| Field Type
 +
| Example
 +
| Notes
 
|-
 
|-
| 1
+
| rowspan=6 | 0x66
| N/A
+
| Window id
| Right mouse click
+
| byte
 +
| <code>0</code>
 +
| The id of the window which was clicked. 0 for player inventory.
 
|-
 
|-
! rowspan=2 | 1
+
| Slot
| 0
+
| short
| N/A
+
| <code>36</code>
| Shift + left mouse click
+
| The clicked slot. See below.
 
|-
 
|-
| 1
+
| Button
| N/A
+
| byte
| Shift + right mouse click ''(Identical behavior)''
+
| <code>1</code>
 +
| The button used in the click. See below.
 
|-
 
|-
! rowspan=5 | 2
+
| Action number
 +
| short
 +
| <code>12</code>
 +
| A unique number for the action, used for transaction handling (See the Transaction packet).
 +
|-
 +
| Mode
 +
| byte
 +
| <code>1</code>
 +
| Inventory operation mode. See below.
 +
|-
 +
| Clicked item
 +
| [[Slot_Data|slot]]
 +
|
 +
|
 +
|-
 +
| Total Size:
 +
| colspan="4" | 8 bytes + slot data
 +
|}
 +
 
 +
See [[Inventory#Windows|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 Action number is actually a counter, starting at 1.  This number is used by the server as a transaction ID to send back a [[#0x6A|Transaction packet]].
 +
 
 +
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
 
| 0
 
| N/A
 
| N/A
| Number key 1
+
| Left mouse click
 
|-
 
|-
 
| 1
 
| 1
 
| N/A
 
| N/A
| Number key 2
+
| Right mouse click
 
|-
 
|-
| 2
+
! rowspan=2 | 1
 +
| 0
 +
| N/A
 +
| Shift + left mouse click
 +
|-
 +
| 1
 +
| N/A
 +
| Shift + right mouse click ''(Identical behavior)''
 +
|-
 +
! rowspan=5 | 2
 +
| 0
 +
| N/A
 +
| Number key 1
 +
|-
 +
| 1
 +
| N/A
 +
| Number key 2
 +
|-
 +
| 2
 
| N/A
 
| N/A
 
| Number key 3
 
| Number key 3
Line 2,905: Line 2,904:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=3 | 0x67
+
| rowspan=3 | 0x67
| class="col1 centeralign" | Window id
+
| Window id
| class="col2 centeralign" | byte
+
| byte
| class="col3 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col4" | The window which is being updated. 0 for player inventory. Note that all known window types include the player inventory. This packet will only be sent for the currently opened window while the player is performing actions, even if it affects the player inventory. After the window is closed, a number of these packets are sent to update the player's inventory window (0).
+
| The window which is being updated. 0 for player inventory. Note that all known window types include the player inventory. This packet will only be sent for the currently opened window while the player is performing actions, even if it affects the player inventory. After the window is closed, a number of these packets are sent to update the player's inventory window (0).
|- class="row2"
+
|-
| class="col0 centeralign" | Slot
+
| Slot
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>36</code>
+
| <code>36</code>
| class="col3" | The slot that should be updated
+
| The slot that should be updated
|- class="row3"
+
|-
| class="col0 centeralign" | Slot data
+
| Slot data
| class="col1 centeralign" | [[Slot_Data|slot]]
+
| [[Slot_Data|slot]]
| class="col2 centeralign" |  
+
|
| class="col3" |
+
|
|- class="row4"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 4 bytes + slot data
+
| colspan="4" | 4 bytes + slot data
 
|}
 
|}
  
Line 2,950: Line 2,949:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="3" | 0x68
+
| rowspan="3" | 0x68
| class="col1 centeralign" | Window id
+
| Window id
| class="col2 centeralign" | byte
+
| byte
| class="col3 centeralign" | <code>1</code>
+
| <code>1</code>
| class="col4" | The id of window which items are being sent for. 0 for player inventory.
+
| The id of window which items are being sent for. 0 for player inventory.
|- class="row2"
+
|-
| class="col0 centeralign" | Count
+
| Count
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>4</code>
+
| <code>4</code>
| class="col3" | The number of slots (see below)
+
| The number of slots (see below)
|- class="row3"
+
|-
| class="col0 centeralign" | Slot data
+
| Slot data
| class="col1 centeralign" | array of [[Slot_Data|slot]]s
+
| array of [[Slot_Data|slot]]s
| class="col2 centeralign" |
+
|
| class="col3" |
+
|
|- class="row4"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 4 bytes + size of slot data array
+
| colspan="4" | 4 bytes + size of slot data array
 
|}
 
|}
  
Line 2,986: Line 2,985:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=3 | 0x69
+
| rowspan=3 | 0x69
| class="col1 centeralign" | Window id
+
| Window id
| class="col2 centeralign" | byte
+
| byte
| class="col3 centeralign" | 2
+
| 2
| class="col4" | The id of the window.
+
| The id of the window.
|- class="row1"
+
|-
| class="col0 centeralign" | Property
+
| Property
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | 1
+
| 1
| class="col3" | Which property should be updated.
+
| Which property should be updated.
|- class="row1"
+
|-
| class="col0 centeralign" | Value
+
| Value
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | 650
+
| 650
| class="col3" | The new value for the property.
+
| The new value for the property.
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 6 bytes
+
| colspan="4" | 6 bytes
 
|}
 
|}
  
Line 3,043: Line 3,042:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=3 | 0x6A
+
| rowspan=3 | 0x6A
| class="col1 centeralign" | Window id
+
| Window id
| class="col2 centeralign" | byte
+
| byte
| class="col3 centeralign" | 0
+
| 0
| class="col4" | The id of the window that the action occurred in.
+
| The id of the window that the action occurred in.
|- class="row1"
+
|-
| class="col0 centeralign" | Action number
+
| Action number
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | 12
+
| 12
| class="col3" | Every action that is to be accepted has a unique number. This field corresponds to that number.
+
| Every action that is to be accepted has a unique number. This field corresponds to that number.
|- class="row1"
+
|-
| class="col0 centeralign" | Accepted?
+
| Accepted?
| class="col1 centeralign" | boolean
+
| boolean
| class="col2 centeralign" | true
+
| true
| class="col3" | Whether the action was accepted.
+
| Whether the action was accepted.
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 5 bytes
+
| colspan="4" | 5 bytes
 
|}
 
|}
  
Line 3,082: Line 3,081:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=2 | 0x6B
+
| rowspan=2 | 0x6B
| class="col1 centeralign" | Slot
+
| Slot
| class="col2 centeralign" | short
+
| short
| class="col3 centeralign" | 36
+
| 36
| class="col4" | Inventory slot
+
| Inventory slot
|- class="row2"
+
|-
| class="col0 centeralign" | Clicked item
+
| Clicked item
| class="col1 centeralign" | [[Slot_Data|slot]]
+
| [[Slot_Data|slot]]
| class="col2 centeralign" |  
+
|
| class="col3" |
+
|
|- class="row3"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 3 bytes + slot data
+
| colspan="4" | 3 bytes + slot data
 
|}
 
|}
  
Line 3,111: Line 3,110:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=2 | 0x6C
+
| rowspan=2 | 0x6C
| class="col1 centeralign" | Window ID
+
| Window ID
| class="col2 centeralign" | byte
+
| byte
| class="col3 centeralign" | 1
+
| 1
| class="col4" | The ID sent by [[#0x64|Open Window]]
+
| The ID sent by [[#0x64|Open Window]]
|- class="row2"
+
|-
| class="col0 centeralign" | Enchantment
+
| Enchantment
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 0
+
| 0
| class="col3" | The position of the enchantment on the enchantment table window, starting with 0 as the topmost one.
+
| The position of the enchantment on the enchantment table window, starting with 0 as the topmost one.
|- class="row3"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 3 bytes
+
| colspan="4" | 3 bytes
 
|}
 
|}
  
Line 3,140: Line 3,139:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=7 | 0x82
+
| rowspan=7 | 0x82
| class="col1 centeralign" | X
+
| X
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | 128
+
| 128
| class="col4" | Block X Coordinate
+
| Block X Coordinate
|- class="row1"
+
|-
| class="col0 centeralign" | Y
+
| Y
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | 0
+
| 0
| class="col3" | Block Y Coordinate
+
| Block Y Coordinate
|- class="row1"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" | -128
+
| -128
| class="col3" | Block Z Coordinate
+
| Block Z Coordinate
|- class="row1"
+
|-
| class="col0 centeralign" | Text1
+
| Text1
| class="col1 centeralign" | string
+
| string
| class="col2 centeralign" | <code>First line</code>
+
| <code>First line</code>
| class="col3" | First line of text in the sign
+
| First line of text in the sign
|- class="row1"
+
|-
| class="col0 centeralign" | Text2
+
| Text2
| class="col1 centeralign" | string
+
| string
| class="col2 centeralign" | <code>Second line</code>
+
| <code>Second line</code>
| class="col3" | Second line of text in the sign
+
| Second line of text in the sign
|- class="row1"
+
|-
| class="col0 centeralign" | Text3
+
| Text3
| class="col1 centeralign" | string
+
| string
| class="col2 centeralign" | <code>Third line</code>
+
| <code>Third line</code>
| class="col3" | Third line of text in the sign
+
| Third line of text in the sign
|- class="row1"
+
|-
| class="col0 centeralign" | Text4
+
| Text4
| class="col1 centeralign" | string
+
| string
| class="col2 centeralign" | <code>Fourth line</code>
+
| <code>Fourth line</code>
| class="col3" | Fourth line of text in the sign
+
| Fourth line of text in the sign
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 11 bytes + 4 strings
+
| colspan="4" | 11 bytes + 4 strings
|}
+
|}
  
 
This message is sent from the server to the client whenever a sign is discovered or created. This message is sent from the client to the server when the "Done" button is pushed after placing a sign. This message is NOT sent when a sign is destroyed or unloaded.
 
This message is sent from the server to the client whenever a sign is discovered or created. This message is sent from the client to the server when the "Done" button is pushed after placing a sign. This message is NOT sent when a sign is destroyed or unloaded.
Line 3,199: Line 3,198:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="4" | 0x83
+
| rowspan="4" | 0x83
| class="col1 centeralign" | Item Type
+
| Item Type
| class="col2 centeralign" | short
+
| short
| class="col3 centeralign" | <code>358</code>
+
| <code>358</code>
| class="col4" | Type of item being modified
+
| Type of item being modified
|- class="row2"
+
|-
| class="col0 centeralign" | Item ID
+
| Item ID
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>0</code>
+
| <code>0</code>
| class="col3" | The ID (damage value) of the item being modified
+
| The ID (damage value) of the item being modified
|- class="row3"
+
|-
| class="col0 centeralign" | Text length
+
| Text length
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | <code>35</code>
+
| <code>35</code>
| class="col3" | Length of following byte array
+
| Length of following byte array
|- class="row4"
+
|-
| class="col0 centeralign" | Text
+
| Text
| class="col1 centeralign" | byte array
+
| byte array
| class="col2 centeralign" | {0,0,0,20,20,20,20,20}
+
| {0,0,0,20,20,20,20,20}
| class="col3" | ASCII text.
+
| ASCII text.
|- class="row9"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 7 bytes + Text length
+
| colspan="4" | 7 bytes + Text length
 
|}
 
|}
  
Line 3,244: Line 3,243:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="6" | 0x84
+
| rowspan="6" | 0x84
| class="col1 centeralign" | X
+
| X
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" |  
+
|
| class="col4" |  
+
|
|- class="row2"
+
|-
| class="col0 centeralign" | Y
+
| Y
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" |  
+
|
| class="col3" |  
+
|
|- class="row3"
+
|-
| class="col0 centeralign" | Z
+
| Z
| class="col1 centeralign" | int
+
| int
| class="col2 centeralign" |  
+
|
| class="col3" |  
+
|
|- class="row4"
+
|-
| class="col0 centeralign" | Action
+
| Action
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" |  
+
|
| class="col3" | The type of update to perform
+
| The type of update to perform
|- class="row5"
+
|-
| class="col0 centeralign" | Data length
+
| Data length
| class="col1 centeralign" | Short
+
| Short
| class="col2 centeralign" |  
+
|
| class="col3" | Varies
+
| Varies
|- class="row6"
+
|-
| class="col0 centeralign" | NBT Data
+
| NBT Data
| class="col1 centeralign" | Byte Array - Present if data length > 0
+
| Byte Array - Present if data length > 0
| class="col2 centeralign" |  
+
|
| class="col3" | Compressed with [[wikipedia:Gzip|gzip]]. Varies
+
| Compressed with [[wikipedia:Gzip|gzip]]. Varies
|- class="row7"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 12 + itemstack bytes
+
| colspan="4" | 12 + itemstack bytes
 
|}
 
|}
  
Line 3,298: Line 3,297:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=3 | 0xC8
+
| rowspan=3 | 0xC8
| class="col1 centeralign" | Statistic ID
+
| Statistic ID
| class="col2 centeralign" | int
+
| int
| class="col3 centeralign" | 1003
+
| 1003
| class="col4" | The ID of the statistic. See [http://www.minecraftforum.net/viewtopic.php?f=1020&t=295360 List of statistics].
+
| The ID of the statistic. See [http://www.minecraftforum.net/viewtopic.php?f=1020&t=295360 List of statistics].
|- class="row1"
+
|-
| class="col0 centeralign" | Amount
+
| Amount
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 1
+
| 1
| class="col3" | The amount to increment the statistic.
+
| The amount to increment the statistic.
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 6 bytes
+
| colspan="4" | 6 bytes
|}
+
|}
 
+
 
  
 
{{anchor|0xC9}}
 
{{anchor|0xC9}}
Line 3,329: Line 3,328:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=3 | 0xC9
+
| rowspan=3 | 0xC9
| class="col1 centeralign" | Player name
+
| Player name
| class="col2 centeralign" | string
+
| string
| class="col3 centeralign" | barneygale
+
| barneygale
| class="col4" | Supports chat colouring, limited to 16 characters.
+
| Supports chat colouring, limited to 16 characters.
|- class="row2"
+
|-
| class="col0 centeralign" | Online
+
| Online
| class="col1 centeralign" | boolean
+
| boolean
| class="col2 centeralign" | true
+
| true
| class="col3" | If false, the client will remove the user from the list.
+
| If false, the client will remove the user from the list.
|- class="row3"
+
|-
| class="col0 centeralign" | Ping
+
| Ping
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" | 193
+
| 193
| class="col3" | Ping, presumably in ms.
+
| Ping, presumably in ms.
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 6 bytes + length of string
+
| colspan="4" | 6 bytes + length of string
 
|}
 
|}
  
Line 3,370: Line 3,369:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=4 | 0xCA
+
| rowspan=4 | 0xCA
| class="col1 centeralign" | Flags
+
| Flags
| class="col2 centeralign" | byte
+
| byte
| class="col3 centeralign" | 5
+
| 5
| class="col4" |  
+
|
|- class="row2"
+
|-
| class="col0 centeralign" | Flying speed
+
| Flying speed
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 12
+
| 12
| class="col3" |  
+
|
|- class="row3"
+
|-
| class="col0 centeralign" | Walking speed
+
| Walking speed
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 25
+
| 25
| class="col3" |  
+
|
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 4 bytes
+
| colspan="4" | 4 bytes
 
|}
 
|}
  
Line 3,411: Line 3,410:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" | 0xCB
+
| 0xCB
| class="col1 centeralign" | Text
+
| Text
| class="col2 centeralign" | string
+
| string
| class="col3 centeralign" |  
+
|
| class="col4" |  
+
|
|- class="row3"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 3 bytes + length of string
+
| colspan="4" | 3 bytes + length of string
 
|}
 
|}
  
Line 3,436: Line 3,435:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="5" | 0xCC
+
| rowspan="5" | 0xCC
| class="col1 centeralign" | Locale
+
| Locale
| class="col2 centeralign" | string
+
| string
| class="col3 centeralign" | en_GB
+
| en_GB
|- class="row2"
+
|-
| class="col0 centeralign" | View distance
+
| View distance
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 0
+
| 0
| class="col3" | 0-3 for 'far', 'normal', 'short', 'tiny'.
+
| 0-3 for 'far', 'normal', 'short', 'tiny'.
|- class="row3"
+
|-
| class="col0 centeralign" | Chat flags
+
| Chat flags
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 8
+
| 8
| class="col3" | Chat settings. See notes below.
+
| Chat settings. See notes below.
|- class="row4"
+
|-
| class="col0 centeralign" | Difficulty
+
| Difficulty
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 0
+
| 0
| class="col3 centeralign" | Client-side difficulty from options.txt
+
| Client-side difficulty from options.txt
|- class="row5"
+
|-
| class="col0 centeralign" | Show Cape
+
| Show Cape
| class="col1 centeralign" | boolean
+
| boolean
| class="col2 centeralign" | true
+
| true
| class="col3 centeralign" | Client-side "show cape" option
+
| Client-side "show cape" option
|- class="row6"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 7 bytes + length of string
+
| colspan="4" | 7 bytes + length of string
|}
+
|}
 
+
 
Chat flags has several values packed into one byte.
+
Chat flags has several values packed into one byte.
  
 
'''Chat Enabled:''' Bits 0-1. 00: Enabled.  01: Commands only.  10: Hidden.
 
'''Chat Enabled:''' Bits 0-1. 00: Enabled.  01: Commands only.  10: Hidden.
Line 3,487: Line 3,486:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="1" | 0xCD
+
| rowspan="1" | 0xCD
| class="col1 centeralign" | Payload
+
| Payload
| class="col2 centeralign" | byte
+
| byte
| class="col3 centeralign" | 0
+
| 0
| class="col4" | Bit field. 0: Initial spawn, 1: Respawn after death
+
| Bit field. 0: Initial spawn, 1: Respawn after death
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="5" | 2 bytes
+
| colspan="5" | 2 bytes
 
|}
 
|}
  
Line 3,513: Line 3,512:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=3 | 0xCE
+
| rowspan=3 | 0xCE
| class="col1 centeralign" | Objective name
+
| Objective name
| class="col2 centeralign" | string
+
| string
| class="col3 centeralign" | <code>deaths</code>
+
| <code>deaths</code>
| class="col4" | An unique name for the objective
+
| An unique name for the objective
|- class="row2"
+
|-
| class="col0 centeralign" | Objective value
+
| Objective value
| class="col1 centeralign" | string
+
| string
| class="col2 centeralign" | <code>Deaths</code>
+
| <code>Deaths</code>
| class="col3" | The text to be displayed for the score.
+
| The text to be displayed for the score.
|- class="row3"
+
|-
| class="col0 centeralign" | Create/Remove
+
| Create/Remove
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 0
+
| 0
| class="col3" | 0 to create the scoreboard. 1 to remove the scoreboard. 2 to update the display text. TODO: Check these values
+
| 0 to create the scoreboard. 1 to remove the scoreboard. 2 to update the display text. TODO: Check these values
|- class="row4"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 6 bytes + length of string
+
| colspan="4" | 6 bytes + length of string
 
|}
 
|}
  
Line 3,549: Line 3,548:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=4 | 0xCF
+
| rowspan=4 | 0xCF
| class="col1 centeralign" | Item Name
+
| Item Name
| class="col2 centeralign" | string
+
| string
| class="col3 centeralign" | <code>Bob</code>
+
| <code>Bob</code>
| class="col4" | An unique name to be displayed in the list.
+
| An unique name to be displayed in the list.
|- class="row2"
+
|-
| class="col0 centeralign" | Update/Remove
+
| Update/Remove
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 0
+
| 0
| class="col3" | 0 to create/update an item. 1 to remove an item.
+
| 0 to create/update an item. 1 to remove an item.
|- class="row3"
+
|-
| class="col0 centeralign" | Score Name
+
| Score Name
| class="col1 centeralign" | string
+
| string
| class="col2 centeralign" | <code>deaths</code>
+
| <code>deaths</code>
| class="col3" | The unique name for the scoreboard to be updated. Only sent when Update/Remove does not equal 1.
+
| The unique name for the scoreboard to be updated. Only sent when Update/Remove does not equal 1.
|- class="row4"
+
|-
| class="col0 centeralign" | Value
+
| Value
| class="col1 centeralign" | integer
+
| integer
| class="col2 centeralign" | 5
+
| 5
| class="col3" | The score to be displayed next to the entry. Only sent when Update/Remove does not equal 1.
+
| The score to be displayed next to the entry. Only sent when Update/Remove does not equal 1.
|- class="row5"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 9 bytes + length of strings
+
| colspan="4" | 9 bytes + length of strings
 
|}
 
|}
  
Line 3,590: Line 3,589:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=2 | 0xD0
+
| rowspan=2 | 0xD0
| class="col1 centeralign" | Position
+
| Position
| class="col2 centeralign" | byte
+
| byte
| class="col3 centeralign" | 1
+
| 1
| class="col4" | The position of the scoreboard. 0 = list, 1 = sidebar, 2 = belowName.
+
| The position of the scoreboard. 0 = list, 1 = sidebar, 2 = belowName.
|- class="row2"
+
|-
| class="col0 centeralign" | Score Name
+
| Score Name
| class="col1 centeralign" | string
+
| string
| class="col2 centeralign" | <code>deaths</code>
+
| <code>deaths</code>
| class="col3" | The unique name for the scoreboard to be displayed.
+
| The unique name for the scoreboard to be displayed.
|- class="row3"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 4 bytes + length of string
+
| colspan="4" | 4 bytes + length of string
 
|}
 
|}
  
Line 3,621: Line 3,620:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=8 | 0xD1
+
| rowspan=8 | 0xD1
| class="col1 centeralign" | Team Name
+
| Team Name
| class="col2 centeralign" | string
+
| string
| class="col3 centeralign" | mcdevs
+
| mcdevs
| class="col4" | A unique name for the team. (Shared with scoreboard).
+
| A unique name for the team. (Shared with scoreboard).
|- class="row2"
+
|-
| class="col0 centeralign" | Mode
+
| Mode
| class="col1 centeralign" | byte
+
| byte
| class="col2 centeralign" | 0
+
| 0
| class="col3" | If 0 then the team is created.  
+
| If 0 then the team is created.  
 
If 1 then the team is removed.  
 
If 1 then the team is removed.  
  
Line 3,645: Line 3,644:
  
 
If 4 then players are removed from the team.
 
If 4 then players are removed from the team.
|- class="row3"
+
|-
| class="col1 centeralign" | Team Display Name
+
| Team Display Name
| class="col2 centeralign" | string
+
| string
| class="col3 centeralign" | McDevs
+
| McDevs
| class="col4" |  Only if Mode = 0 or 2.  
+
| Only if Mode = 0 or 2.  
|- class="row3"
+
|-
| class="col1 centeralign" | Team Prefix
+
| Team Prefix
| class="col2 centeralign" | string
+
| string
| class="col3 centeralign" |  
+
|
| class="col4" |  Only if Mode = 0 or 2. Displayed before the players' name that are part of this team.  
+
| Only if Mode = 0 or 2. Displayed before the players' name that are part of this team.  
|- class="row4"
+
|-
| class="col1 centeralign" | Team Suffix
+
| Team Suffix
| class="col2 centeralign" | string
+
| string
| class="col3 centeralign" |  
+
|
| class="col4" |  Only if Mode = 0 or 2. Displayed after the players' name that are part of this team.  
+
| Only if Mode = 0 or 2. Displayed after the players' name that are part of this team.  
|- class="row5"
+
|-
| class="col1 centeralign" | Friendly fire
+
| Friendly fire
| class="col2 centeralign" | byte
+
| byte
| class="col3 centeralign" | 0
+
| 0
| class="col4" |  Only if Mode = 0 or 2; 0 for off, 1 for on, 3 for seeing friendly invisibles
+
| Only if Mode = 0 or 2; 0 for off, 1 for on, 3 for seeing friendly invisibles
|- class="row6"
+
|-
| class="col1 centeralign" | Player count
+
| Player count
| class="col2 centeralign" | short
+
| short
| class="col3 centeralign" | 0
+
| 0
| class="col4" |  Only if Mode = 0 or 3 or 4. Number of players in the array
+
| Only if Mode = 0 or 3 or 4. Number of players in the array
|- class="row7"
+
|-
| class="col1 centeralign" | Players
+
| Players
| class="col2 centeralign" | Array of strings
+
| Array of strings
| class="col3 centeralign" |  
+
|
| class="col4" |  Only if Mode = 0 or 3 or 4. Players to be added/remove from the team.
+
| Only if Mode = 0 or 3 or 4. Players to be added/remove from the team.
|- class="row8"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | Variable
+
| colspan="4" | Variable
 
|}
 
|}
  
Line 3,689: Line 3,688:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan=3 | 0xFA
+
| rowspan=3 | 0xFA
| class="col1 centeralign" | Channel
+
| Channel
| class="col2 centeralign" | string
+
| string
| class="col3 centeralign" | MyMod:testchannel
+
| MyMod:testchannel
| class="col4" | Name of the "channel" used to send the data.
+
| Name of the "channel" used to send the data.
|- class="row2"
+
|-
| class="col0 centeralign" | length
+
| length
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" |  
+
|
| class="col3" | Length of the following byte array
+
| Length of the following byte array
|- class="row3"
+
|-
| class="col0 centeralign" | data
+
| data
| class="col1 centeralign" | byte array
+
| byte array
| class="col2 centeralign" |  
+
|
| class="col3" | Any data.
+
| Any data.
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 5 bytes + length of string + length of byte array
+
| colspan="4" | 5 bytes + length of string + length of byte array
 
|}
 
|}
  
Line 3,728: Line 3,727:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="4" | 0xFC
+
| rowspan="4" | 0xFC
| class="col1 centeralign" | Shared secret length
+
| Shared secret length
| class="col2 centeralign" | short
+
| short
| class="col3 centeralign" |  
+
|
| class="col4 centeralign" |  
+
|
|- class="row2"
+
|-
| class="col0 centeralign" | Shared secret
+
| Shared secret
| class="col1 centeralign" | byte array
+
| byte array
| class="col2 centeralign" |  
+
|
| class="col3 centeralign" |
+
|
|- class="row3"
+
|-
| class="col0 centeralign" | Verify token length
+
| Verify token length
| class="col1 centeralign" | short
+
| short
| class="col2 centeralign" |  
+
|
| class="col3 centeralign" | 
+
|
|- class="row4"
+
|-
| class="col0 centeralign" | Verify token response
+
| Verify token response
| class="col1 centeralign" | byte array
+
| byte array
| class="col2 centeralign" |  
+
|
| class="col3 centeralign" |  
+
|
|- class="row5"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 5 bytes + length of shared secret + length of token
+
| colspan="4" | 5 bytes + length of shared secret + length of token
 
|}
 
|}
  
Line 3,769: Line 3,768:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="6" | 0xFD
+
| rowspan="6" | 0xFD
| class="col1 centeralign" | Server id length
+
| Server id length
| class="col2 centeralign" | short
+
| short
| class="col3 centeralign" |  
+
|
| class="col4 centeralign" |  
+
|
|- class="row2"
+
|-
| class="col1 centeralign" | Server id
+
| Server id
| class="col2 centeralign" | string
+
| string
| class="col3 centeralign" |  
+
|
| class="col4 centeralign" |  
+
|
|- class="row3"
+
|-
| class="col1 centeralign" | Public key length
+
| Public key length
| class="col2 centeralign" | short
+
| short
| class="col3 centeralign" |  
+
|
| class="col4 centeralign" |  
+
|
|- class="row4"
+
|-
| class="col1 centeralign" | Public key
+
| Public key
| class="col2 centeralign" | byte array
+
| byte array
| class="col3 centeralign" |  
+
|
| class="col4 centeralign" |  
+
|
|- class="row5"
+
|-
| class="col1 centeralign" | Verify token length
+
| Verify token length
| class="col2 centeralign" | short
+
| short
| class="col3 centeralign" |  
+
|
| class="col4 centeralign" |  
+
|
|- class="row6"
+
|-
| class="col1 centeralign" | Verify token
+
| Verify token
| class="col2 centeralign" | byte array
+
| byte array
| class="col3 centeralign" |  
+
|
| class="col4 centeralign" |  
+
|
|- class="row7"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 7 bytes + length of string + length of key + length of token
+
| colspan="4" | 7 bytes + length of string + length of key + length of token
 
|}
 
|}
  
Line 3,820: Line 3,819:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" rowspan="1" | 0xFE
+
| rowspan="1" | 0xFE
| class="col1 centeralign" | Magic
+
| Magic
| class="col2 centeralign" | byte
+
| byte
| class="col3 centeralign" | <code>1</code>
+
| <code>1</code>
| class="col4 centeralign" | always <code>1</code>
+
| always <code>1</code>
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 2 bytes
+
| colspan="4" | 2 bytes
 
|}
 
|}
  
Line 3,849: Line 3,848:
  
 
{| class="wikitable"
 
{| class="wikitable"
|- class="row0"
+
|-
| class="col0" | Packet ID
+
| Packet ID
| class="col1" | Field Name
+
| Field Name
| class="col2" | Field Type
+
| Field Type
| class="col3" | Example
+
| Example
| class="col4" | Notes
+
| Notes
|- class="row1"
+
|-
| class="col0 centeralign" | 0xFF
+
| 0xFF
| class="col1 centeralign" | Reason
+
| Reason
| class="col2 centeralign" | string
+
| string
| class="col3 centeralign" | <code>The server is full!</code>
+
| <code>The server is full!</code>
| class="col4" | Displayed to the client when the connection terminates
+
| Displayed to the client when the connection terminates
|- class="row2"
+
|-
| class="col0" | Total Size:
+
| Total Size:
| class="col1 rightalign" colspan="4" | 3 bytes + length of strings
+
| colspan="4" | 3 bytes + length of strings
 
|}
 
|}
  

Revision as of 21:15, 20 May 2013

This page presents a dissection of the current stable Minecraft protocol. The current pre-release protocol is documented elsewhere. The protocol for Pocket Minecraft is substantially different, and is documented at Pocket Minecraft Protocol.

If you're having trouble, check out the FAQ or ask for help in the IRC channel (#mcdevs on irc.freenode.net).

Note: While you may use the contents of this page without restriction to create servers, clients, bots, etc… you still need to provide attribution to #mcdevs if you copy any of the contents of this page for publication elsewhere.

Definition
Player When used in the singular, Player always refers to the client connected to the server
Entity Entity refers to any item, player, mob, minecart or boat in the world. This definition is subject to change as Notch extends the protocol
EID An EID - or Entity ID - is a unique 4-byte integer used to identify a specific entity
XYZ In this document, the axis names are the same as those used by Notch. Y points upwards, X points South, and Z points West.

Contents

Packets

All packets begin with a single "Packet ID" byte. Listed packet size includes this byte. Packets are either "server to client", "client to server", or "Two-Way" (both). Packets are not prefixed with their length. For variable length packets, you must parse it completely to determine its length.


Keep Alive (0x00)

Two-Way

The server will frequently send out a keep-alive, each containing a random ID. The client must respond with the same packet. The Beta server will disconnect a client if it doesn't receive at least one packet before 1200 in-game ticks, and the Beta client will time out the connection under the same conditions. The client may send packets with Keep-alive ID=0.

Packet ID Field Name Field Type Example Notes
0x00 Keep-alive ID int 957759560 Server-generated random id
Total Size: 5 bytes


Login Request (0x01)

Server to Client

See Protocol Encryption for information on logging in.

Packet ID Field Name Field Type Example Notes
0x01 Entity ID int 1298 The Player's Entity ID
Level type string default default, flat, or largeBiomes. level-type in server.properties
Game mode byte 0 0: survival, 1: creative, 2: adventure. Bit 3 (0x8) is the hardcore flag
Dimension byte 0 -1: nether, 0: overworld, 1: end
Difficulty byte 1 0 thru 3 for Peaceful, Easy, Normal, Hard
Not used byte 0 Only 0 observed from vanilla server, was previously world height
Max players byte 8 Used by the client to draw the player list
Total Size: 12 bytes + length of strings


Handshake (0x02)

Client to server

See Protocol Encryption for information on logging in.

Packet ID Field Name Field Type Example Notes
0x02 Protocol Version byte 51 As of 1.5.2 the protocol version is 61. See Protocol version numbers for list.
Username string _AlexM The username of the player attempting to connect
Server Host string localhost
Server Port int 25565
Total Size: 10 bytes + length of strings


Chat Message (0x03)

Two-Way

The default server will check the message to see if it begins with a '/'. If it doesn't, the username of the sender is prepended and sent to all other clients (including the original sender). If it does, the server assumes it to be a command and attempts to process it. A message longer than 100 characters will cause the server to kick the client. (As of 1.3.2, the vanilla client appears to limit the text a user can enter to 100 charaters.) This limits the chat message packet length to 203 bytes (as characters are encoded on 2 bytes). Note that this limit does not apply to chat messages sent by the server, which are limited to 32767 characters since 1.2.5. This change was initially done by allowing the client to not slice the message up to 119 (the previous limit), without changes to the server. For this reason, the vanilla server kept the code to cut messages at 119, but this isn't a protocol limitation and can be ignored.

For more information, see Chat.

Packet ID Field Name Field Type Example Notes
0x03 Message string <Bob> Hello World! User input must be sanitized server-side
Total Size: 3 bytes + length of strings


Time Update (0x04)

Server to Client

Time is based on ticks, where 20 ticks happen every second. There are 24000 ticks in a day, making Minecraft days exactly 20 minutes long.

The time of day is based on the timestamp modulo 24000. 0 is sunrise, 6000 is noon, 12000 is sunset, and 18000 is midnight.

The default SMP server increments the time by 20 every second.

Packet ID Field Name Field Type Example Notes
0x04 Age of the world long 45464654 In ticks; not changed by server commands
Time of Day long 21321 The world (or region) time, in ticks
Total Size: 17 Bytes


Entity Equipment (0x05)

Server to Client

Packet ID Field Name Field Type Example Notes
0x05 Entity ID int 0x00010643 Named Entity ID
Slot short 4 Equipment slot: 0=held, 1-4=armor slot (1 - boots, 2 - leggings, 3 - chestplate, 4 - helmet)
Item slot Item in slot format
Total Size: 7 bytes + slot data


Spawn Position (0x06)

Server to Client

Sent by the server after login to specify the coordinates of the spawn point (the point at which players spawn at, and which the compass points to). It can be sent at any time to update the point compasses point at.

Packet ID Field Name Field Type Example Notes
0x06 X int 117 Spawn X in block coordinates
Y int 70 Spawn Y in block coordinates
Z int -46 Spawn Z in block coordinates
Total Size: 13 bytes


Use Entity (0x07)

Client to Server

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.

Packet ID Field Name Field Type Example Notes
0x07 User int 1298 The entity of the player (ignored by the server)
Target int 1805 The entity the player is interacting with
Mouse button boolean true true when the player is left-clicking and false when right-clicking.
Total Size: 10 bytes


Update Health (0x08)

Server to Client

Sent by the server to update/set the health of the player it is sent to. Added in protocol version 5.

Food saturation acts as a food "overcharge". Food values will not decrease while the saturation is over zero. Players logging in automatically get a saturation of 5.0. Eating food increases the saturation as well as the food bar.

Packet ID Field Name Field Type Example Notes
0x08 Health short 20 0 or less = dead, 20 = full HP
Food short 20 0 - 20
Food Saturation float 5.0 Seems to vary from 0.0 to 5.0 in integer increments
Total Size: 9 bytes


Respawn (0x09)

Server to Client

To change the player's dimension (overworld/nether/end), send them a respawn packet with the appropriate dimension, followed by prechunks/chunks for the new dimension, and finally a position and look packet. You do not need to unload chunks, the client will do it automatically.

Packet ID Field Name Field Type Example Notes
0x09 Dimension int 1 -1: The Nether, 0: The Overworld, 1: The End
Difficulty byte 1 0 thru 3 for Peaceful, Easy, Normal, Hard. 1 is always sent c->s
Game mode byte 1 0: survival, 1: creative, 2: adventure. The hardcore flag is not included
World height short 256 Defaults to 256
Level type string default See 0x01 login
Total Size: 11 bytes + length of string

  • Please avoid changing player's dimension to same dimension as he was in (i.e. from Nether to Nether, from Overworld to Overworld). While at first glance everything seems to work, weird bugs can occur, i.e. such player will be unable to attack other players in new world (minecraft client just won't send "Use Entity (0x07)" packet on hitting, only "Animation (0x12)" packet), even though he can see them and they can attack him (fixes after his death and respawn though).

If you actually have multiple worlds of same dimension on server and need to teleport player between them, use intermediate world (with different dimension) between them.

Player (0x0A)

Client to Server

This packet is used to indicate whether the player is on ground (walking/swimming), or airborne (jumping/falling).

When dropping from sufficient height, fall damage is applied when this state goes from False to True. The amount of damage applied is based on the point where it last changed from True to False. Note that there are several movement related packets containing this state.

This packet was previously referred to as Flying

Packet ID Field Name Field Type Example Notes
0x0A On Ground boolean 1 True if the client is on the ground, False otherwise
Total Size: 2 bytes


Player Position (0x0B)

Client to Server

Updates the players XYZ position on the server. If Stance - Y is less than 0.1 or greater than 1.65, the stance is illegal and the client will be kicked with the message “Illegal Stance”. If the distance between the last known position of the player on the server and the new position set by this packet is greater than 100 units will result in the client being kicked for "You moved too quickly :( (Hacking?)" Also if the absolute number of X or Z is set greater than 3.2E7D the client will be kicked for "Illegal position"


Packet ID Field Name Field Type Example Notes
0x0B X double 102.809 Absolute position
Y double 70.00 Absolute position
Stance double 71.62 Used to modify the players bounding box when going up stairs, crouching, etc…
Z double 68.30 Absolute position
On Ground boolean 1

Derived from packet 0x0A

Total Size: 34 bytes


Player Look (0x0C)

Client to Server

The unit circle for yaw

Updates the direction the player is looking in.

Yaw is measured in degrees, and does not follow classical trigonometry rules. The unit circle of yaw on the xz-plane starts at (0, 1) and turns backwards towards (-1, 0), or in other words, it turns clockwise instead of counterclockwise. Additionally, yaw is not clamped to between 0 and 360 degrees; any number is valid, including negative numbers and numbers greater than 360.

Pitch is measured in degrees, where 0 is looking straight ahead, -90 is looking straight up, and 90 is looking straight down.

You can get a unit vector from a given yaw/pitch via:

 x = -cos(pitch) * sin(yaw)
 y = -sin(pitch)
 z =  cos(pitch) * cos(yaw)
Packet ID Field Name Field Type Example Notes
0x0C Yaw float 0.00 Absolute rotation on the X Axis, in degrees
Pitch float 0.00 Absolute rotation on the Y Axis, in degrees
On Ground boolean 1

Derived from packet 0x0A

Total Size: 10 bytes


Player Position and Look (0x0D)

Two-Way

A combination of Player Look and Player position.

Note: When this packet is sent from the server, the 'Y' and 'Stance' fields are swapped.

Packet ID Field Name Field Type Example Notes
0x0D X double 6.5 Absolute position
Y double 65.620000004768372 Absolute position
Stance double 67.240000009536743 Used to modify the players bounding box when going up stairs, crouching, etc…
Z double 7.5 Absolute position
Yaw float 0.0 Absolute rotation on the X Axis
Pitch float 0.0 Absolute rotation on the Y Axis
On Ground boolean 0

Derived from packet 0x0A

Total Size: 42 bytes


Player Digging (0x0E)

Client to Server

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.

Packet ID Field Name Field Type Example Notes
0x0E Status byte 1 The action the player is taking against the block (see below)
X int 32 Block position
Y byte 64 Block position
Z int 32 Block position
Face byte 3 The face being hit (see below)
Total Size: 12 bytes

Status can (currently) be one of six values:

Meaning Value
Started digging 0
Cancelled digging 1
Finished digging 2
Drop item stack 3
Drop item 4
Shoot arrow / finish eating 5

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 send 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, and all other values 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. The x, y and z fields are all set to 0 like above, with the exception of the face field, which is set to 255.

The face can be one of six values, representing the face being hit:

Value 0 1 2 3 4 5
Offset -Y +Y -Z +Z -X +X

In 1.7.3, when a player opens a door with left click the server receives Packet 0xE+start digging and opens the door.


Player Block Placement (0x0F)

Client to Server

Packet ID Field Name Field Type Example Notes
0x0F X int 32 Block position
Y unsigned byte 64 Block position
Z int 32 Block position
Direction byte 3 The offset to use for block/item placement (see below)
Held item slot
Cursor position X byte 0 - 16 The position of the crosshair on the block
Cursor position Y byte 0 - 16
Cursor position Z byte 0 - 16
Total Size: 14 bytes + slot data

In normal operation (ie placing a block), this packet is sent once, with the values set normally.

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, shooting bows, using buckets, etc.

In a Notchian Beta client, the block or item ID corresponds to whatever the client is currently holding, and the client sends one of these packets any time a right-click is issued on a surface, so no assumptions can be made about the safety of the ID. However, with the implementation of server-side inventory, a Notchian server seems to ignore the item ID, instead operating on server-side inventory information and holding selection. The client has been observed (1.2.5 and 1.3.2) to send both real item IDs and -1 in a single session.

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.


Held Item Change (0x10)

Two-Way

Sent when the player changes the slot selection

Packet ID Field Name Field Type Example Notes
0x10 Slot ID short 1 The slot which the player has selected (0-8)
Total Size: 3 bytes


Use Bed (0x11)

Server to Client

This packet tells that a player goes to bed.

The client with the matching Entity ID will go into bed mode.

This Packet is sent to all nearby players including the one sent to bed.

Packet ID Field Name Field Type Example Notes
0x11 Entity ID int 89 Player ID
Unknown byte 0 Only 0 has been observed
X coordinate int -247 Bed headboard X as block coordinate
Y coordinate byte 78 Bed headboard Y as block coordinate
Z coordinate int 128 Bed headboard Z as block coordinate
Total Size: 15 bytes



Animation (0x12)

Two-Way

Sent whenever an entity should change animation.

Packet ID Field Name Field Type Example Notes
0x12 EID int 55534 Player ID
Animation byte 1 Animation ID
Total Size: 6 bytes

Animation can be one of the following values:

ID Animation
0 No animation
1 Swing arm
2 Damage animation
3 Leave bed
5 Eat food
102 (unknown)
104 Crouch
105 Uncrouch

Only 1 (swing arm) is sent by notchian clients. Crouching is sent via 0x13. Damage is server-side, and so is not sent by notchian clients. See also 0x26.


Entity Action (0x13)

Client to Server

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.

Packet ID Field Name Field Type Example Notes
0x13 EID int 55534 Player ID
Action ID byte 1 The ID of the action, see below.
Total Size: 6 bytes

Action ID can be one of the following values:

ID Action
1 Crouch
2 Uncrouch
3 Leave bed
4 Start sprinting
5 Stop sprinting


Spawn Named Entity (0x14)

Server to Client

The only named entities (at the moment) are players (either real or NPC/Bot). This packet is sent by the server when a player comes into visible range, not when a player joins.

Servers can, however, safely spawn player entities for players not in visible range. The client appears to handle it correctly.

At one point, the Notchian client was not okay with receiving player entity packets, including 0x14, that refer to its own username or EID; and would teleport to the absolute origin of the map and fall through the Void any time it received them. However, in more recent versions, it appears to handle them correctly, by spawning a new entity as directed (though future packets referring to the entity ID may be handled incorrectly).

Packet ID Field Name Field Type Example Notes
0x14 EID int 94453 Player ID
Player Name string Twdtwd Max length of 16
X int 784 Player X as Absolute Integer
Y int 2131 Player Y as Absolute Integer
Z int -752 Player Z as Absolute Integer
Yaw byte 0 Player rotation as a packed byte
Pitch byte 0 Player rotation as a packed byte
Current Item short 0 The item the player is currently holding. Note that this should be 0 for "no item", unlike -1 used in other packets. A negative value crashes clients.
Metadata Metadata The 1.3 client crashes on packets with no metadata, but the server can send any metadata key of 0, 1 or 8 and the client is fine.
Total Size: 22 bytes + length of strings + metadata (at least 1)


Collect Item (0x16)

Server to Client

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 (0x1D does that), and it doesn't add it to your inventory (0x67 does that). The server only checks for items to be picked up after each Player Position and Player Position & Look packet sent by the client.

Packet ID Field Name Field Type Example Notes
0x16 Collected EID int 38
Collector EID int 20
Total Size: 9 bytes


Spawn Object/Vehicle (0x17)

Server to Client

Sent by the server when an Object/Vehicle is created. The throwers entity id is now used for fishing floats too.

Packet ID Field Name Field Type Example Notes
0x17 EID int 62 Entity ID of the Object
Type byte 11 The type of object (see Entities#Objects)
X int 16080 The Absolute Integer X Position of the object
Y int 2299 The Absolute Integer Y Position of the object
Z int 592 The Absolute Integer Z Position of the object
Pitch byte 67 The pitch in steps of 2p/256
Yaw byte 0 The yaw in steps of 2p/256
Object Data Object Data
Total Size: 23 or 29 bytes


Spawn Mob (0x18)

Server to Client

Sent by the server when a Mob Entity is Spawned

Packet ID Field Name Field Type Example Notes
0x18 EID int 446 Entity ID
Type byte 91 The type of mob. See Entities#Mobs
X int 13366 The Absolute Integer X Position of the object
Y int 2176 The Absolute Integer Y Position of the object
Z int 1680 The Absolute Integer Z Position of the object
Pitch byte 0 The pitch in steps of 2p/256
Head Pitch byte 10 The head pitch in steps of 2p/256
Yaw byte -27 Yaw in steps of 2p/256
Velocity X short 0
Velocity Y short 0
Velocity Z short 0
Metadata Metadata 0 0 127 Varies by mob, see Entities
Total Size: 27 bytes + Metadata (at least 3 as you must send at least 1 item of metadata)



Spawn Painting (0x19)

Server to Client

This packet shows location, name, and type of painting.

Packet ID Field Name Field Type Example Notes
0x19 Entity ID int 0x00000326 Unique entity ID
Title string Creepers Name of the painting; max length 13 (length of "SkullAndRoses")
X int 50 Center X coordinate
Y int 66 Center Y coordinate
Z int -50 Center Z coordinate
Direction int 0 Direction the painting faces (0 -z, 1 -x, 2 +z, 3 +x)
Total Size: 23 bytes + length of string

Calculating the center of an image: given a (width x height) grid of cells, with (0, 0) being the top left corner, the center is (max(0, width / 2 - 1), height / 2). E.g.

2x1 (1, 0) 4x4 (1, 2)


Spawn Experience Orb (0x1A)

Server to Client

Spawns one or more experience orbs. Coordinates are in absolute units.

Packet ID Field Name Field Type Example Notes
0x1A Entity ID int 105668
x int -1143
y int 1952
z int 1166
count short 7
Total Size: 19 bytes


Entity Velocity (0x1C)

Server to Client

This packet is new to version 4 of the protocol, and is believed to be Entity Velocity/Motion.

Velocity is believed to be in units of 1/8000 of a block per server tick (50ms); for example, -1343 would move (-1343 / 8000) = −0.167875 blocks per tick (or −3,3575 blocks per second).

(This packet data values are not fully verified)

Packet ID Field Name Field Type Example Notes
0x1C Entity ID int 1805

The entity ID

Velocity X short -1343

Velocity on the X axis

Velocity Y short 0

Velocity on the Y axis

Velocity Z short 0

Velocity on the Z axis

Total Size: 11 bytes


Destroy Entity (0x1D)

Server to Client

Sent by the server when an list of Entities is to be destroyed on the client.

Packet ID Field Name Field Type Example Notes
0x1D Entity Count byte 3 The amount of entities which should be destroyed
Entity IDs array of int 452, 546, 123 The list of entity ids which should be destroyed
Total Size: 2 + (entity count * 4) bytes



Entity (0x1E)

Server to Client

Most entity-related packets are subclasses of this packet. When sent from the server to the client, it may initialize the entry.

For player entities, either this packet or any move/look packet is sent every game tick. So the meaning of this packet is basically that the entity did not move/look since the last such packet.

Packet ID Field Name Field Type Example Notes
0x1E EID int 446 Entity ID
Total Size: 5 bytes


Entity Relative Move (0x1F)

Server to Client

This packet is sent by the server when an entity moves less then 4 blocks; if an entity moves more than 4 blocks Entity Teleport should be sent instead.

This packet allows at most four blocks movement in any direction, because byte range is from -128 to 127. Movement is an offset of Absolute Int; to convert relative move to block coordinate offset, divide by 32.

Packet ID Field Name Field Type Example Notes
0x1F EID int 459 Entity ID
dX byte 1 X axis Relative movement as an Absolute Integer
dY byte -7 Y axis Relative movement as an Absolute Integer
dZ byte 5 Z axis Relative movement as an Absolute Integer
Total Size: 8 bytes


Entity Look (0x20)

Server to Client

This packet is sent by the server when an entity rotates. Example: "Yaw" field 64 means a 90 degree turn.

Packet ID Field Name Field Type Example Notes
0x20 EID int 459 Entity ID
Yaw byte 126 The X Axis rotation as a fraction of 360
Pitch byte 0 The Y Axis rotation as a fraction of 360
Total Size: 7 bytes


Entity Look and Relative Move (0x21)

Server to Client

This packet is sent by the server when an entity rotates and moves. Since a byte range is limited from -128 to 127, and movement is offset of Absolute Int, this packet allows at most four blocks movement in any direction. (-128/32 == -4)

Packet ID Field Name Field Type Example Notes
0x21 EID int 459 Entity ID
dX byte 1 X axis Relative movement as an Absolute Integer
dY byte -7 Y axis Relative movement as an Absolute Integer
dZ byte 5 Z axis Relative movement as an Absolute Integer
Yaw byte 126 The X Axis rotation as a fraction of 360
Pitch byte 0 The Y Axis rotation as a fraction of 360
Total Size: 10 bytes


Entity Teleport (0x22)

Server to Client

This packet is sent by the server when an entity moves more than 4 blocks.

Packet ID Field Name Field Type Example Notes
0x22 EID int 459 Entity ID
X int 14162 X axis position as an Absolute Integer
Y int 2176 Y axis position as an Absolute Integer
Z int 1111 Z axis position as an Absolute Integer
Yaw byte 126 The X Axis rotation as a fraction of 360
Pitch byte 0 The Y Axis rotation as a fraction of 360
Total Size: 19 bytes


Entity Head Look (0x23)

Server to Client

Changes the direction an entity's head is facing.

Packet ID Field Name Field Type Example Notes
0x23 Entity ID int
Head Yaw byte Head yaw in steps of 2p/256
Total Size: 6 bytes


Entity Status (0x26)

Server to Client

Packet ID Field Name Field Type Example Notes
0x26 Entity ID Int 34353
Entity Status Byte 0x03 See below
Total Size: 6 bytes
Entity Status Meaning
2 Entity hurt
3 Entity dead
6 Wolf taming
7 Wolf tamed
8 Wolf shaking water off itself
9 (of self) Eating accepted by server
10 Sheep eating grass
11 Iron Golem handing over a rose
12 Spawn "heart" particles near a villager
13 Spawn particles indicating that a villager is angry and seeking revenge
14 Spawn happy particles near a villager
15 Spawn a "magic" particle near the Witch
16 Zombie converting into a villager by shaking violently
17 A firework exploding

Attach Entity (0x27)

Server to Client

This packet is sent when a player has been attached to an entity (e.g. Minecart)

Packet ID Field Name Field Type Example Notes
0x27 Entity ID int 1298

The player entity ID being attached

Vehicle ID int 1805

The vehicle entity ID attached to (-1 for unattaching)

Total Size: 9 bytes


Entity Metadata (0x28)

Server to Client

Packet ID Field Name Field Type Example Notes
0x28 Entity ID int 0x00000326 Unique entity ID to update.
Entity Metadata Metadata 0x00 0x01 0x7F Metadata varies by entity. See Entities
Total Size: 5 bytes + Metadata


Entity Effect (0x29)

Server to Client

Packet ID Field Name Field Type Example Notes
0x29 Entity ID int 14 Entity ID of a player
Effect ID byte 17 See here
Amplifier byte 0
Duration short 64
Total Size: 9 bytes


Remove Entity Effect (0x2A)

Server to Client

Packet ID Field Name Field Type Example Notes
0x2a Entity ID int Entity ID of a player
Effect ID byte 17 See here
Total Size: 6 bytes


Set Experience (0x2B)

Server to Client

Sent by the server when the client should change experience levels.

Packet ID Field Name Field Type Example Notes
0x2B Experience bar float 0.5960060358047485 Used for drawing the experience bar - value is between 0 and 1.
Level short 8
Total experience short 130
Total Size: 9 bytes


Chunk Data (0x33)

Server to Client

See also: SMP Map Format

Packet ID Field Name Field Type Example Notes
0x33 X int Chunk X Coordinate (*16 to get true X)
Z int Chunk Z Coordinate (*16 to get true Z)
Ground-up continuous boolean This is True if the packet represents all sections in this vertical column, where the primary bit map specifies exactly which sections are included, and which are air.
Primary bit map unsigned short 15 Bitmask with 1 for every 16x16x16 section which data follows in the compressed data.
Add bit map unsigned short 0 Same as above, but this is used exclusively for the 'add' portion of the payload
Compressed size int Size of compressed chunk data.
Compressed data unsigned byte array The chunk data is compressed using ZLib Deflate function.
Total Size: 18 bytes + Compressed chunk size


Multi Block Change (0x34)

Server to Client

Packet ID Field Name Field Type Example Notes
0x34 Chunk X int -9 Chunk X Coordinate
Chunk Z int 12 Chunk Z Coordinate
Record count short The number of blocks affected
Data size int The total size of the data, in bytes. Should always be 4*record count - please confirm.
Data Coordinates, type, and metadata of blocks to change (see below table).
Total Size: 15 bytes + Arrays

Each record is four bytes.

Bit mask Width Meaning
00 00 00 0F 4 bits Block metadata
00 00 FF F0 12 bits Block ID
00 FF 00 00 8 bits Y co-ordinate
0F 00 00 00 4 bits Z co-ordinate, relative to chunk
F0 00 00 00 4 bits X co-ordinate, relative to chunk


Block Change (0x35)

Server to Client

Packet ID Field Name Field Type Example Notes
0x35 X int 502 Block X Coordinate
Y byte 71 Block Y Coordinate
Z int 18 Block Z Coordinate
Block Type short 78 The new block type for the block
Block Metadata byte 0 The new Metadata for the block
Total Size: 13 bytes


Block Action (0x36)

Server to Client

This packet is used for a number of things:

  • Chests opening and closing
  • Pistons pushing and pulling
  • Note blocks playing
Packet ID Field Name Field Type Example Notes
0x36 X int 502 Block X Coordinate
Y short 71 Block Y Coordinate
Z int 18 Block Z Coordinate
Byte 1 byte 3 Varies depending on block - see below
Byte 2 byte 17 Varies depending on block - see below
Block ID short 29 The block id this action is set for
Total Size: 15 bytes

See Also: Block Actions


Block Break Animation (0x37)

Server to Client

Packet ID Field Name Field Type Example Notes
0x37 EID? int Entity breaking the block?
X int Block position
Y int
Z int
Destroy Stage byte 1 How far destroyed this block is.
Total Size: 18 bytes


Map Chunk Bulk (0x38)

Server to Client

See also: SMP Map Format

To reduce the number of bytes this packet is used to send chunks together for better compression results.

Packet ID Field Name Field Type Example Notes
0x38 Chunk column count short The number of chunks in this packet
Data length int the size of the data field
Sky light sent boolean Whether or not the chunk data contains a light nibble array. This is true in the main world, false in the end + nether
Data byte array Compressed chunk data
Meta information see below see below
Total Size: 8 + (Chunk data size) + 12 * (Chunk Count) bytes

Meta Information Structure

This structure is repeated for each chunk column sent

Field Name Field Type Example Notes
Chunk X int 10 The X coordinate of the specific chunk
Chunk Z int 10 The Z coordinate of the specific chunk
Primary bitmap unsigned short 15 A bitmap which specifies which sections are not empty in this chunk
Add bitmap unsigned short 0 A bitmap which specifies which sections need add information because of very high block ids. not yet used. needs verification
Total Size: 12 bytes

Explosion (0x3C)

Server to Client

Sent when an explosion occurs (creepers, TNT, and ghast fireballs).

Packet ID Field Name Field Type Example Notes
0x3C X double
Y double
Z double
Radius float 3.0 Currently unused in the client
Record count int This is the count, not the size. The size is 3 times this value.
Records (byte, byte, byte) × count Each record is 3 signed bytes long, each bytes are the XYZ (respectively) offsets of affected blocks.
Player Motion X float X velocity of the player being pushed by the explosion
Player Motion Y float Y velocity of the player being pushed by the explosion
Player Motion Z float Z velocity of the player being pushed by the explosion
Total Size: 45 bytes + 3*(Record count) bytes

Each block in Records is set to air. Coordinates for each axis in record is int(X) + record.x


Sound Or Particle Effect (0x3D)

Server to Client

Sent when a client is to play a sound or particle effect.

By default, the minecraft client adjusts the volume of sound effects based on distance. The final boolean field is used to disable this, and instead the effect is played from 2 blocks away in the correct direction. Currently this is only used for effect 1013 (mob.wither.spawn), and is ignored for any other value by the client.

Packet ID Field Name Field Type Example Notes
0x3D Effect ID int 1003 The ID of the effect, see below.
X int The X location of the effect.
Y byte The Y location of the effect.
Z int The Z location of the effect.
Data int 0 Extra data for certain effects, see below.
Disable relative volume boolean false See above
Total Size: 19 bytes

Effects

Sound:

  • 1000: random.click
  • 1001: random.click
  • 1002: random.bow
  • 1003: random.door_open or random.door_close (50/50 chance)
  • 1004: random.fizz
  • 1005: Play a music disc. Data: Record ID
  • (1006 not assigned)
  • 1007: mob.ghast.charge
  • 1008: mob.ghast.fireball
  • (1009 not assigned)
  • 1010: mob.zombie.wood
  • 1011: mob.zombie.metal
  • 1012: mob.zombie.woodbreak
  • 1013: mob.wither.spawn

Particle:

  • 2000: Spawns 10 smoke particles, e.g. from a fire. Data: direction, see below
  • 2001: Block break. Data: Block ID
  • 2002: Splash potion. Particle effect + glass break sound. Data: Potion ID
  • 2003: Eye of ender. Actual client effect to be determined.
  • 2004: Mob spawn particle effect: smoke + flames

Smoke directions:

ID Direction
0 South - East
1 South
2 South - West
3 East
4 (Up or middle ?)
5 West
6 North - East
7 North
8 North - West


Named Sound Effect (0x3E)

Server to client

Used to play a sound effect on the client.

All known sound effect names can be seen here.

Packet ID Field Name Field Type Example Notes
0x3E Sound name string step.grass 250
Effect position X int 250 effect X multiplied by 8
Effect position Y int 250 effect Y multiplied by 8
Effect position Z int 250 effect Z multiplied by 8
Volume float 9 1 is 100%, can be more
Pitch byte 1 63 is 100%, can be more
Total Size: 20 bytes + length of string


Particle (0x3F)

Server to Client

This displays the named particle

Packet ID Field Name Field Type Example Notes
0x3F Particle name string hugeexplosion The name of the particle to create. A list can be found here
X float 0 X position of the particle
Y float 0 Y position of the particle
Z float 0 Z position of the particle
Offset X float 0 This is added to the X position after being multiplied by random.nextGaussian()
Offset Y float 0 This is added to the Y position after being multiplied by random.nextGaussian()
Offset Z float 0 This is added to the Z position after being multiplied by random.nextGaussian()
Particle speed float 0 The speed of each particle
Number of particles int 0 The number of particles to create
Total Size: 34 bytes + length of string


Change Game State (0x46)

Server to Client

This packet appeared with protocol version 10. Currently, it appears when a bed can't be used as a spawn point and when the rain state changes. it could have additional uses in the future.

The class has an array of strings linked to reason codes 0, 1, 2, and 3 but only the codes for 1 and 2 are null.

Packet ID Field Name Field Type Example Notes
0x46 Reason byte 0
Game mode byte 0 Used only when reason = 3. 0 is survival, 1 is creative.
Total Size: 3 bytes

Reason codes

Code Effect Text
0 Invalid Bed "tile.bed.notValid"
1 Begin raining null
2 End raining null
3 Change game mode gameMode.changed
4 Enter credits


Spawn Global Entity (0x47)

Server to Client

With this packet, the server notifies the client of thunderbolts striking within a 512 block radius around the player. The coordinates specify where exactly the thunderbolt strikes.

Packet ID Field Name Field Type Example Notes
0x47 Entity ID int 4 The entity ID of the thunderbolt
Type byte 1 The global entity type, currently always 1 for thunderbolt.
X int 133 Thunderbolt X as Absolute Integer
Y int 913 Thunderbolt Y as Absolute Integer
Z int 63552 Thunderbolt Z as Absolute Integer
Total Size: 18 bytes


Open Window (0x64)

Server to Client

This is sent to the client when it should open an inventory, such as a chest, workbench, or furnace. This message is not sent anywhere for clients opening their own inventory.

Packet ID Field Name Field Type Example Notes
0x64 Window id byte 123 A unique id number for the window to be displayed. Notchian server implementation is a counter, starting at 1.
Inventory Type byte 2 The window type to use for display. Check below
Window title string Chest The title of the window.
Number of Slots byte 3 Number of slots in the window (excluding the number of slots in the player inventory).
Use provided window title boolean 1 If false, the client will look up a string like "window.minecart". If true, the client uses what the server provides.
Total Size: 7 bytes + length of string

See inventory windows for further information.


Close Window (0x65)

Two-Way

This packet is sent by the client when closing a window. This packet is sent from the server to the client when a window is forcibly closed, such as when a chest is destroyed while it's open.

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 inventory.

Packet ID Field Name Field Type Example Notes
0x65 Window id byte 0 This is the id of the window that was closed. 0 for inventory.
Total Size: 2 bytes


Click Window (0x66)

Client to Server

This packet is sent by the player when it clicks on a slot in a window.

Packet ID Field Name Field Type Example Notes
0x66 Window id byte 0 The id of the window which was clicked. 0 for player inventory.
Slot short 36 The clicked slot. See below.
Button byte 1 The button used in the click. See below.
Action number short 12 A unique number for the action, used for transaction handling (See the Transaction packet).
Mode byte 1 Inventory operation mode. See below.
Clicked item slot
Total Size: 8 bytes + slot data

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 Action number is actually a counter, starting at 1. This number is used by the server as a transaction ID to send back a Transaction packet.

The distinct type of click performed by the client is determined by the combination of the "Mode" and "Button" fields.

Mode Button Slot Trigger
0 0 N/A Left mouse click
1 N/A Right mouse click
1 0 N/A Shift + left mouse click
1 N/A Shift + right mouse click (Identical behavior)
2 0 N/A Number key 1
1 N/A Number key 2
2 N/A Number key 3
... ... ...
8 N/A Number key 9
3 2 N/A Middle click
4 0 Not -999 Drop key (Q)
1 Not -999 Ctrl + Drop key (Ctrl-Q)
0 -999 Left click outside inventory holding nothing (No-op)
1 -999 Right click outside inventory holding nothing (No-op)
5 0 -999 Starting left mouse paint (Or middle mouse)
4 -999 Starting right mouse paint
1 Not -999 Left mouse painting progress
5 Not -999 Right mouse painting progress
2 -999 Ending left mouse paint
6 -999 Ending right mouse paint
6 0 N/A 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 items), then holding mouse button (left, right or middle) and dragging holded 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):

  1. packet with mode 5, slot -999 , button (0 for left | 4 for right);
  2. packet for every slot painted on, mode is still 5, button (1 | 5);
  3. 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.


Set Slot (0x67)

Server to Client

Sent by the server when an item in a slot (in a window) is added/removed.

Packet ID Field Name Field Type Example Notes
0x67 Window id byte 0 The window which is being updated. 0 for player inventory. Note that all known window types include the player inventory. This packet will only be sent for the currently opened window while the player is performing actions, even if it affects the player inventory. After the window is closed, a number of these packets are sent to update the player's inventory window (0).
Slot short 36 The slot that should be updated
Slot data slot
Total Size: 4 bytes + slot data

Note that if window ID and slot are both -1, it means the item currently attached to the cursor.

See inventory windows for further information about how slots are indexed.

Slots: [1]


Set Window Items (0x68)

Server to Client

The inventory slots

Sent by the server when an item in a slot (in a window) is added/removed. This includes the main inventory, equipped armour and crafting slots.

Packet ID Field Name Field Type Example Notes
0x68 Window id byte 1 The id of window which items are being sent for. 0 for player inventory.
Count short 4 The number of slots (see below)
Slot data array of slots
Total Size: 4 bytes + size of slot data array

See inventory windows for further information about how slots are indexed.


Update Window Property (0x69)

Server to Client

Packet ID Field Name Field Type Example Notes
0x69 Window id byte 2 The id of the window.
Property short 1 Which property should be updated.
Value short 650 The new value for the property.
Total Size: 6 bytes

Furnace

Properties:

  • 0: Progress arrow
  • 1: Fire icon (fuel)

Values:

  • 0-200 for progress arrow
  • 0-200 for fuel indicator

Ranges are presumably in in-game ticks

Enchantment Table

Properties: 0, 1 or 2 depending on the "enchantment slot" being given.

Values: The enchantment's level.


Confirm Transaction (0x6A)

Two-Way

A packet from the server indicating whether a request from the client was accepted, or whether there was a conflict (due to lag). This packet is also sent from the client to the server in response to a server transaction rejection packet.

Packet ID Field Name Field Type Example Notes
0x6A Window id byte 0 The id of the window that the action occurred in.
Action number short 12 Every action that is to be accepted has a unique number. This field corresponds to that number.
Accepted? boolean true Whether the action was accepted.
Total Size: 5 bytes


Creative Inventory Action (0x6B)

Two-Way

While the user is in the standard inventory (i.e., not a crafting bench) on a creative-mode server then the server will send this packet:

  • If an item is dropped into the quick bar
  • If an item is picked up from the quick bar (item id is -1)
Packet ID Field Name Field Type Example Notes
0x6B Slot short 36 Inventory slot
Clicked item slot
Total Size: 3 bytes + slot data


Enchant Item (0x6C)

Client to Server

Packet ID Field Name Field Type Example Notes
0x6C Window ID byte 1 The ID sent by Open Window
Enchantment byte 0 The position of the enchantment on the enchantment table window, starting with 0 as the topmost one.
Total Size: 3 bytes


Update Sign (0x82)

Two-Way

Packet ID Field Name Field Type Example Notes
0x82 X int 128 Block X Coordinate
Y short 0 Block Y Coordinate
Z int -128 Block Z Coordinate
Text1 string First line First line of text in the sign
Text2 string Second line Second line of text in the sign
Text3 string Third line Third line of text in the sign
Text4 string Fourth line Fourth line of text in the sign
Total Size: 11 bytes + 4 strings

This message is sent from the server to the client whenever a sign is discovered or created. This message is sent from the client to the server when the "Done" button is pushed after placing a sign. This message is NOT sent when a sign is destroyed or unloaded.


Item Data (0x83)

Server to Client

Sent to specify complex data on an item; currently used only for maps.

Packet ID Field Name Field Type Example Notes
0x83 Item Type short 358 Type of item being modified
Item ID short 0 The ID (damage value) of the item being modified
Text length short 35 Length of following byte array
Text byte array {0,0,0,20,20,20,20,20} ASCII text.
Total Size: 7 bytes + Text length

Maps If the first byte of the text is 0, the next two bytes are X start and Y start and the rest of the bytes are the colors in that column.

If the first byte of the text is 1, the rest of the bytes are in groups of three: (data, x, y). The lower half of the data is the type (always 0 under vanilla) and the upper half is the direction.


Update Tile Entity (0x84)

Server to Client

Essentially a block update on a tile entity.

Packet ID Field Name Field Type Example Notes
0x84 X int
Y short
Z int
Action byte The type of update to perform
Data length Short Varies
NBT Data Byte Array - Present if data length > 0 Compressed with gzip. Varies
Total Size: 12 + itemstack bytes

Actions

  • 1: Set mob displayed inside a mob spawner. Custom 1 contains the mob type


Increment Statistic (0xC8)

Server to Client

Packet ID Field Name Field Type Example Notes
0xC8 Statistic ID int 1003 The ID of the statistic. See List of statistics.
Amount byte 1 The amount to increment the statistic.
Total Size: 6 bytes


Player List Item (0xC9)

Server to Client

Sent by the notchian server to update the user list (<tab> in the client). The server sends one packet per user per tick, amounting to 20 packets/s for 1 online user, 40 for 2, and so forth.

Packet ID Field Name Field Type Example Notes
0xC9 Player name string barneygale Supports chat colouring, limited to 16 characters.
Online boolean true If false, the client will remove the user from the list.
Ping short 193 Ping, presumably in ms.
Total Size: 6 bytes + length of string


Player Abilities (0xCA)

Two-Way

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.

These booleans are whether damage is disabled (god mode, '8' bit), whether the player can fly ('4' bit), whether the player is flying ('2' bit), and whether the player is in creative mode ('1' bit).

To get the values of these booleans, simply AND (&) the byte with 1,2,4 and 8 respectively, to get the 0 or 1 bitwise value. To set them OR (|) them with their repspective masks. 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.

Packet ID Field Name Field Type Example Notes
0xCA Flags byte 5
Flying speed byte 12
Walking speed byte 25
Total Size: 4 bytes


Tab-complete (0xCB)

Two-way

Sent C->S when the user presses [tab] while writing text. The payload contains all text behind the cursor.

The server responds with an auto-completion of the last word sent to it. In the case of regular chat, this is a player username. Command names and parameters are also supported.

In the event of more than one possible completion, the server responds with the options packed into the single string field, separated by a null character. Note that as strings are UTF-16, this is two bytes wide.

Packet ID Field Name Field Type Example Notes
0xCB Text string
Total Size: 3 bytes + length of string


Client Settings (0xCC)

Client to server

Sent when the player connects, or when settings are changed.

Packet ID Field Name Field Type Example Notes
0xCC Locale string en_GB
View distance byte 0 0-3 for 'far', 'normal', 'short', 'tiny'.
Chat flags byte 8 Chat settings. See notes below.
Difficulty byte 0 Client-side difficulty from options.txt
Show Cape boolean true Client-side "show cape" option
Total Size: 7 bytes + length of string

Chat flags has several values packed into one byte.

Chat Enabled: Bits 0-1. 00: Enabled. 01: Commands only. 10: Hidden.

Colors Enabled: Bit 3. 0: Disabled. 1: Enabled.


Client Statuses (0xCD)

Client to server

Sent when the client is ready to complete login and when the client is ready to respawn after death.

Packet ID Field Name Field Type Example Notes
0xCD Payload byte 0 Bit field. 0: Initial spawn, 1: Respawn after death
Total Size: 2 bytes


Scoreboard Objective (0xCE)

Server to Client

This is sent to the client when it should create a new scoreboard or remove one.

Packet ID Field Name Field Type Example Notes
0xCE Objective name string deaths An unique name for the objective
Objective value string Deaths The text to be displayed for the score.
Create/Remove byte 0 0 to create the scoreboard. 1 to remove the scoreboard. 2 to update the display text. TODO: Check these values
Total Size: 6 bytes + length of string


Update Score (0xCF)

Server to Client

This is sent to the client when it should update a scoreboard item.

Packet ID Field Name Field Type Example Notes
0xCF Item Name string Bob An unique name to be displayed in the list.
Update/Remove byte 0 0 to create/update an item. 1 to remove an item.
Score Name string deaths The unique name for the scoreboard to be updated. Only sent when Update/Remove does not equal 1.
Value integer 5 The score to be displayed next to the entry. Only sent when Update/Remove does not equal 1.
Total Size: 9 bytes + length of strings


Display Scoreboard (0xD0)

Server to Client

This is sent to the client when it should display a scoreboard.

Packet ID Field Name Field Type Example Notes
0xD0 Position byte 1 The position of the scoreboard. 0 = list, 1 = sidebar, 2 = belowName.
Score Name string deaths The unique name for the scoreboard to be displayed.
Total Size: 4 bytes + length of string


Teams (0xD1)

Server to Client

Creates and updates teams.

Packet ID Field Name Field Type Example Notes
0xD1 Team Name string mcdevs A unique name for the team. (Shared with scoreboard).
Mode byte 0 If 0 then the team is created.

If 1 then the team is removed.

If 2 the team team information is updated.

If 3 then new players are added to the team.

If 4 then players are removed from the team.

Team Display Name string McDevs Only if Mode = 0 or 2.
Team Prefix string Only if Mode = 0 or 2. Displayed before the players' name that are part of this team.
Team Suffix string Only if Mode = 0 or 2. Displayed after the players' name that are part of this team.
Friendly fire byte 0 Only if Mode = 0 or 2; 0 for off, 1 for on, 3 for seeing friendly invisibles
Player count short 0 Only if Mode = 0 or 3 or 4. Number of players in the array
Players Array of strings Only if Mode = 0 or 3 or 4. Players to be added/remove from the team.
Total Size: Variable


Plugin Message (0xFA)

Two-Way

Mods and plugins can use this to send their data. As of 1.3, Minecraft itself uses a number of plugin channels. These internal channels are prefixed with MC|.

Packet ID Field Name Field Type Example Notes
0xFA Channel string MyMod:testchannel Name of the "channel" used to send the data.
length short Length of the following byte array
data byte array Any data.
Total Size: 5 bytes + length of string + length of byte array

More documentation on this: http://dinnerbone.com/blog/2012/01/13/minecraft-plugin-channels-messaging/


Encryption Key Response (0xFC)

Two-Way

See Protocol Encryption for information on this packet. Bypassing the encryption is possible, authentication for the player name is still needed if the server is in online mode, but instead of sending this packet, you send Client Statuses instead.

Packet ID Field Name Field Type Example Notes
0xFC Shared secret length short
Shared secret byte array
Verify token length short
Verify token response byte array
Total Size: 5 bytes + length of shared secret + length of token


Encryption Key Request (0xFD)

Server to client

See Protocol Encryption for information on this packet.

Packet ID Field Name Field Type Example Notes
0xFD Server id length short
Server id string
Public key length short
Public key byte array
Verify token length short
Verify token byte array
Total Size: 7 bytes + length of string + length of key + length of token


Server List Ping (0xFE)

Client to Server

This packet is used by the multiplayer menu to retrieve MOTD, version, and player counts. For more info see Server List Ping

Packet ID Field Name Field Type Example Notes
0xFE Magic byte 1 always 1
Total Size: 2 bytes


Disconnect/Kick (0xFF)

Two-Way

Sent by the server before it disconnects a client, or by the client before it disconnects from the server. The receiver of this packet assumes that the sender has already closed the connection by the time the packet arrives.

Due to race conditions in the client, a local server may need to pause for a short period after sending this packet before closing the connection. An alternative is simply not to close the connection, and wait for the client to do so on receipt of this packet.

Packet ID Field Name Field Type Example Notes
0xFF Reason string The server is full! Displayed to the client when the connection terminates
Total Size: 3 bytes + length of strings

See Also