netproto.txt

Protocol version 0x20231227
Each packet is prefixed by 16-bit length
Lenght 0 packet is allowed as a keep-alive

ClientIntroduction
C: 0x00
C: long proto version
size 5

ServerIntroduction
S: 0x01
S: long proto version
S: long player eid
S: long world x size
S: long world z size
S: long world z bits
size 21
the following is not accounted in the size of the packet
S: zlib compressed world data
uncompressed size: x*y*z*3/2 bytes
compressed size: a multiple of 1024 bytes

Disconnect
C/S: 0x02
C/S: string reason
size 1 + x

0x03 reserved
0x04 reserved
0x05 reserved

ChangePosition
C: 0x06
C: long player x pos * 32
C: long player y pos * 32
C: long player z pos * 32
C: short player yaw * 65535 / 2pi
C: short player pitch * 65535 / 2pi
size 17

ChangeBlock
C: 0x07
C: long block index
C: byte old id
C: byte old data
C: byte new id
C: byte new data
size 9

BlockUpdates
S: 0x08
repeat {
S: long block index
S: byte new id
S: byte new data
}
size 1 + 6x

EntityEnter
S: 0x09
S: long id
size 5

EntityLeave
S: 0x0A
S: long id
size 5

EntityUpdates
S: 0x0B
repeat {
S: long id
S: long player x pos * 32
S: long player y pos * 32
S: long player z pos * 32
S: short player yaw * 65535 / 2pi
S: short player pitch * 65535 / 2pi
}
size 1 + 20x