Module protocol 

Multiplayer networking protocol: packet encoding, decoding, auth tokens, bandwidth tracking, and packet filtering.

Custom binary wire format (no serde dependency):

• Variable-length integers for sequence numbers
• Bit-packed flags in the header
• Delta encoding hints for position payloads
• 16-byte header, variable payload

Structs

BandwidthTracker

Rolling-window bandwidth meter.

ConnectionToken

Opaque token issued by the auth server, embedded in the Connect packet.

Packet

A fully-parsed network packet ready for dispatch.

PacketDecoder

Deserializes packets from a byte buffer with strict bounds checking.

PacketEncoder

Serializes Packet values to a contiguous byte buffer.

PacketFilter

Tracks recently seen sequence numbers to detect replay attacks and malformed packets before they reach higher-level code.

PacketHeader

Fixed-size header that precedes every packet on the wire.

Enums

CompressionHint

Indicates how the payload bytes are compressed. The receiver must use matching decompression.

PacketKind

Discriminant for every packet type on the wire.

ProtocolError

All errors that can arise from encoding or decoding packets.

Constants

FILTER_HISTORY_LEN

Maximum packets stored in replay/filter history.

MAGIC

Magic bytes at the start of every packet (PEMP = Proof-Engine Multiplayer Protocol).

MAX_PAYLOAD_LEN

Maximum allowed payload length (64 KiB).

PROTOCOL_VERSION

Wire protocol version negotiated on connect.