Module codec 

Packet framing, compression, and high-level encode/decode functions.

The Minecraft wire format is:

• Without compression: [VarInt: packet_length][VarInt: packet_id][payload]
• With compression (below threshold): [VarInt: packet_length][0x00][VarInt: packet_id][payload]
• With compression (above threshold): [VarInt: packet_length][VarInt: uncompressed_size][zlib(packet_id + payload)]

Constants

MAX_UNCOMPRESSED_SIZE

Maximum allowed uncompressed packet size (8 MiB).

Functions

encode_packet_data

Encode a typed packet into raw bytes (packet ID + fields), without framing.

read_compressed_frame

Decode the inner frame data when compression is enabled.

read_packet_id

Read a packet ID from frame data.

try_read_frame

Try to extract a single frame from the given buffer.

write_compressed_frame

Wrap packet data with the compression format.

write_frame

Write a frame (length-prefixed) into the destination buffer. inner is the already-encoded packet data (packet ID + payload).