Difference between revisions of "Pre-release protocol"
| Line 39: | Line 39: | ||
| class="col0" | Total Size: | | class="col0" | Total Size: | ||
| class="col1 rightalign" colspan="4" | '''11 bytes''' | | class="col1 rightalign" colspan="4" | '''11 bytes''' | ||
| + | |} | ||
| + | |||
| + | === 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. | ||
| + | |||
| + | {| 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" | 0x13 | ||
| + | | class="col1 centeralign" | EID | ||
| + | | class="col2 centeralign" | int | ||
| + | | class="col3 centeralign" | <code>55534</code> | ||
| + | | class="col4" | Player ID | ||
| + | |- class="row2" | ||
| + | | class="col0 centeralign" | Action ID | ||
| + | | class="col1 centeralign" | byte | ||
| + | | class="col2 centeralign" | <code>1</code> | ||
| + | | class="col3" | The ID of the action, see below. | ||
| + | |- class="row2" | ||
| + | | class="col0 centeralign" | Unknown | ||
| + | | class="col1 centeralign" | byte[] | ||
| + | | class="col2 centeralign" | <code>{ 0, 0, 0, 0 }</code> | ||
| + | | class="col3" | Probably an int32 | ||
| + | |- class="row3" | ||
| + | | class="col0" | Total Size: | ||
| + | | class="col1 rightalign" colspan="4" | 10 bytes | ||
| + | |} | ||
| + | |||
| + | Action ID can be one of the following values: | ||
| + | |||
| + | {| class="wikitable" | ||
| + | |- | ||
| + | ! ID | ||
| + | ! Action | ||
| + | |- | ||
| + | | 1 | ||
| + | | Crouch | ||
| + | |- | ||
| + | | 2 | ||
| + | | Uncrouch | ||
| + | |- | ||
| + | | 3 | ||
| + | | Leave bed | ||
| + | |- | ||
| + | | 4 | ||
| + | | Start sprinting | ||
| + | |- | ||
| + | | 5 | ||
| + | | Stop sprinting | ||
|} | |} | ||
| Line 78: | Line 137: | ||
| class="col0 centeralign" | '''Unknown''' | | class="col0 centeralign" | '''Unknown''' | ||
| class="col1 centeralign" | byte[9] | | class="col1 centeralign" | byte[9] | ||
| − | | class="col2 centeralign" | { 0xCC, 0xCD, 0x3D, 0xCC, 0xCC, 0xCD, 0x10, 0x00, 0x00 } | + | | class="col2 centeralign" | <code>{ 0xCC, 0xCD, 0x3D, 0xCC, 0xCC, 0xCD, 0x10, 0x00, 0x00 }</code> |
| class="col3" | Probably multiple fields. | | class="col3" | Probably multiple fields. | ||
|- class="row2" | |- class="row2" | ||
| class="col0" | Total Size: | | class="col0" | Total Size: | ||
| − | | class="col1 rightalign" colspan="4" | | + | | class="col1 rightalign" colspan="4" | 13 bytes |
|} | |} | ||
Revision as of 08:58, 18 April 2013
This page documents the changes from the last stable Minecraft release (currently 1.5, protocol 60) to the current pre-release, 13w16a (protocol 62). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
Contents
New Packets
-None-
Changed Packets
Update Health (0x08)
Server to Client
http://wiki.vg/Protocol#Update_Health_.280x08.29
| Packet ID | Field Name | Field Type | Example | Notes |
| 0x08 | Health | float | 20.0 | 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: | 11 bytes | |||
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. | |
| Unknown | byte[] | { 0, 0, 0, 0 }
|
Probably an int32 | |
| Total Size: | 10 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 |
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 | ||
| Unknown | byte[9] | { 0xCC, 0xCD, 0x3D, 0xCC, 0xCC, 0xCD, 0x10, 0x00, 0x00 }
|
Probably multiple fields. | |
| Total Size: | 13 bytes | |||
Removed Packets
-None-
Changed Data Types
-None-
Protocol History
-None-
