nfd::face::LpReliability Class Reference

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

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

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

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

Definition at line 33 of file lp-reliability.cpp.

References nfd::face::LpReliability::Options::idleAckTimerPeriod.

Member Function Documentation

void nfd::face::LpReliability::setOptions

(

const Options &

options

)

set options for reliability

Definition at line 46 of file lp-reliability.cpp.

References nfd::face::LpReliability::Options::idleAckTimerPeriod, and nfd::face::LpReliability::Options::isEnabled.

Referenced by nfd::face::GenericLinkService::setOptions().

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 58 of file lp-reliability.cpp.

void nfd::face::LpReliability::handleOutgoing

(

std::vector< lp::Packet > &

frags

)

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

Parameters

frags

fragments of network packet

Definition at line 64 of file lp-reliability.cpp.

References nfd::RttEstimator::computeRto(), nfd::face::LpReliability::Options::isEnabled, ndn::time::steady_clock::now(), and nfd::scheduler::schedule().

Referenced by nfd::face::GenericLinkService::setOptions().

void 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

Definition at line 98 of file lp-reliability.cpp.

References nfd::RttEstimator::addMeasurement(), ndn::lp::Packet::get(), ndn::lp::Packet::has(), nfd::face::LpReliability::Options::isEnabled, ndn::lp::Packet::list(), and ndn::time::steady_clock::now().

Referenced by nfd::face::GenericLinkService::setOptions().

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 146 of file lp-reliability.cpp.

References ndn::lp::tlv::Ack, ndn::lp::Packet::add(), nfd::scheduler::ScopedEventId::cancel(), nfd::RttEstimator::computeRto(), nfd::face::LpReliability::Options::idleAckTimerPeriod, nfd::face::LpReliability::Options::isEnabled, ndn::lp::tlv::LpPacket, ndn::MAX_NDN_PACKET_SIZE, nfd::face::LpReliability::Options::maxRetx, nfd::face::MTU_UNLIMITED, nfd::face::GenericLinkServiceCounters::nAcknowledged, ndn::time::steady_clock::now(), nfd::face::GenericLinkServiceCounters::nRetransmitted, nfd::face::GenericLinkServiceCounters::nRetxExhausted, nfd::scheduler::schedule(), nfd::face::LpReliability::Options::seqNumLossThreshold, ndn::lp::Packet::set(), ndn::Block::size(), ndn::tlv::sizeOfNonNegativeInteger(), ndn::tlv::sizeOfVarNumber(), ndn::Block::type(), and ndn::lp::Packet::wireEncode().

Referenced by nfd::face::GenericLinkService::setOptions().

Member Data Documentation

constexpr size_t nfd::face::LpReliability::RESERVED_HEADER_SPACE = 3 + 1 + sizeof(lp::Sequence)

static

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

Definition at line 191 of file lp-reliability.hpp.

Referenced by nfd::face::GenericLinkService::setOptions().

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The documentation for this class was generated from the following files:

• ndnSIM/NFD/daemon/face/lp-reliability.hpp
• ndnSIM/NFD/daemon/face/lp-reliability.cpp