Module lp 

NDNLPv2 Link Protocol Packet framing.

An LpPacket (TLV 0x64) wraps a network-layer packet (Interest or Data) with optional link-layer header fields:

• Nack (0x0320): carries a NackReason; the fragment is the nacked Interest
• CongestionMark (0x0340): hop-by-hop congestion signal
• Sequence / FragIndex / FragCount: fragmentation (decode only)

Bare Interest/Data packets (not wrapped in LpPacket) are still valid on the wire — LpPacket framing is only required when link-layer fields are present.

Structs

FragmentHeader

Result of lightweight fragment extraction.

LpHeaders

Optional LP header fields for encoding.

LpPacket

A decoded NDNLPv2 LpPacket.

Enums

CachePolicyType

Cache policy type for NDNLPv2 CachePolicy header field.

Functions

encode_lp_acks

Encode a bare Ack-only LpPacket (no fragment payload).

encode_lp_nack

Encode a Nack as an NDNLPv2 LpPacket.

encode_lp_packet

Wrap a bare Interest or Data in a minimal NDNLPv2 LpPacket.

encode_lp_reliable

Encode a reliability-enabled LpPacket with TxSequence, optional fragmentation, and piggybacked Acks.

encode_lp_with_headers

Encode an LpPacket with optional header fields.

extract_acks

Fast-path extraction of Sequence and Ack fields from a raw LpPacket.

extract_fragment

Lightweight fragment extraction from an LpPacket.

is_lp_packet

Check if raw bytes start with an LpPacket TLV type (0x64).