FunnelTracker tracks funnel from the perspective of eyeball to origin.

ICMP represents is an IP packet + ICMP message.

ICMPDecoder decodes raw packets into IP and ICMP.

IP represents a generic IP packet.

IPDecoder decodes raw packets into IP.

https://www.rfc-editor.org/rfc/rfc2460#section-8.1.

RawPacket represents a raw packet or one encoded by Encoder.

Funnel is an abstraction to pipe from 1 src to 1 or more destinations.

FunnelID represents a key type that can be used by FunnelTracker.

FunnelUniPipe is a unidirectional pipe for sending raw packets.

Packet represents an IP packet or a packet that is encapsulated by IP.