Glossary

This glossary defines protocol terms that must stay consistent across English and Chinese documentation.

Term	Chinese	Meaning	Source of truth
wire format	wire format / 线格式	Serialized bytes on the physical link	include/xgl/internal/xgl_wire.h, docs/en/protocol/wire-format.md
frame	帧	Complete serialized unit: base header, TLVs, payload, optional auth trailer, frame CRC	include/xgl/internal/xgl_frame.h
packet	包	Internal transport/network semantic object before or after serialization	include/xgl/xgl_types.h, include/xgl/internal/xgl_packet_pool.h
packet number	包号	32-bit monotonic number used by reliability, ordering, and replay	include/xgl/internal/xgl_wire.h
remote peer id	远端 peer ID	The peer identifier for scoped transport state; TX uses target, RX/ACK uses source	src/transport/xgl_transport_peer.c
connection scope	连接作用域	State partition keyed by connection_id	include/xgl/xgl_types.h
session epoch	session epoch	Reboot/session partition used by replay, peer, and reassembly state	include/xgl/internal/xgl_wire.h
ACK range	ACK range / 确认范围	TLV acknowledgement format that can release multiple packet numbers	src/wire/xgl_wire_ack_ext.c
SACK	SACK / 选择性确认	Bitmap acknowledgement that preserves holes and supports fast retransmit	src/transport/xgl_transport_sack.c
AAD	AAD / 附加认证数据	Header and TLV bytes authenticated separately from payload	src/wire/xgl_wire.c
auth trailer	认证 trailer	Authentication tag after payload and before frame CRC	src/wire/xgl_frame_auth.c
frame CRC	frame CRC	CRC16 over serialized frame bytes before the trailing CRC field	src/wire/xgl_frame.c
route MTU	route MTU	Maximum complete serialized frame length for a route	include/xgl/xgl_types.h
fragment budget	分片预算	Payload capacity left after route MTU subtracts headers, TLVs, auth, and CRC	src/transport/xgl_transport_send_plan.c

When a term changes, update this page, the matching Chinese page, and any protocol page that relies on the term.