nfd::face::LpReliability Class Reference

provides for reliable sending and receiving of link-layer packets More...

#include <daemon/face/lp-reliability.hpp>

Inheritance diagram for nfd::face::LpReliability:

Collaboration diagram for nfd::face::LpReliability:

Classes
struct	Options

Public Member Functions
	LpReliability (const Options &options, GenericLinkService *linkService)
const GenericLinkService *	getLinkService () const
void	handleOutgoing (std::vector< lp::Packet > &frags, lp::Packet &&pkt, bool isInterest)
	observe outgoing fragment(s) of a network packet and store for potential retransmission More...
void	piggyback (lp::Packet &pkt, ssize_t mtu)
	called by GenericLinkService to attach Acks onto an outgoing LpPacket More...
bool	processIncomingPacket (const lp::Packet &pkt)
	extract and parse all Acks and add Ack for contained Fragment (if any) to AckQueue More...
void	setOptions (const Options &options)
	set options for reliability More...

Public Attributes
signal::Signal< LpReliability, Interest >	onDroppedInterest
	signals on Interest dropped by reliability system for exceeding allowed number of retx More...

Static Public Attributes
static constexpr size_t	RESERVED_HEADER_SPACE
	TxSequence TLV-TYPE (3 octets) + TLV-LENGTH (1 octet) + lp::Sequence (8 octets) More...

Detailed Description

provides for reliable sending and receiving of link-layer packets

See also

https://redmine.named-data.net/projects/nfd/wiki/NDNLPv2

Definition at line 45 of file lp-reliability.hpp.

Constructor & Destructor Documentation

LpReliability()

nfd::face::LpReliability::LpReliability	(	const Options &	options,
		GenericLinkService *	linkService
	)

Definition at line 36 of file lp-reliability.cpp.

Member Function Documentation

getLinkService()

const GenericLinkService * nfd::face::LpReliability::getLinkService

(

)

const

Returns

GenericLinkService that owns this instance

This is only used for logging, and may be nullptr.

Definition at line 59 of file lp-reliability.cpp.

handleOutgoing()

void nfd::face::LpReliability::handleOutgoing	(	std::vector< lp::Packet > &	frags,
		lp::Packet &&	pkt,
		bool	isInterest
	)

observe outgoing fragment(s) of a network packet and store for potential retransmission

Parameters

frags	fragments of network packet
pkt	encapsulated network packet
isInterest	whether the network packet is an Interest

Definition at line 65 of file lp-reliability.cpp.

piggyback()

void nfd::face::LpReliability::piggyback	(	lp::Packet &	pkt,
		ssize_t	mtu
	)

called by GenericLinkService to attach Acks onto an outgoing LpPacket

Parameters

pkt	outgoing LpPacket to attach Acks to
mtu	MTU of the Transport

Definition at line 193 of file lp-reliability.cpp.

processIncomingPacket()

bool nfd::face::LpReliability::processIncomingPacket

(

const lp::Packet &

pkt

)

extract and parse all Acks and add Ack for contained Fragment (if any) to AckQueue

Parameters

pkt	incoming LpPacket

Returns

whether incoming LpPacket is new and not a duplicate

Definition at line 107 of file lp-reliability.cpp.

setOptions()

void nfd::face::LpReliability::setOptions

(

const Options &

options

)

set options for reliability

Definition at line 47 of file lp-reliability.cpp.

Member Data Documentation

onDroppedInterest

signal::Signal<LpReliability, Interest> nfd::face::LpReliability::onDroppedInterest

signals on Interest dropped by reliability system for exceeding allowed number of retx

Definition at line 72 of file lp-reliability.hpp.

RESERVED_HEADER_SPACE

constexpr size_t nfd::face::LpReliability::RESERVED_HEADER_SPACE

static

Initial value:

= tlv::sizeOfVarNumber(lp::tlv::TxSequence) +
                                                  tlv::sizeOfVarNumber(sizeof(lp::Sequence)) +
                                                  sizeof(lp::Sequence)

TxSequence TLV-TYPE (3 octets) + TLV-LENGTH (1 octet) + lp::Sequence (8 octets)

Definition at line 199 of file lp-reliability.hpp.