Package: inet.protocolelement.redundancy

StreamMerger

simple module

This module merges the packets of the same stream by removing duplicates. In addition it also replaces the stream name on the packet based on the mapping parameter. For merging it maintains a separate finite buffer per stream with the last seen sequence numbers.

Inheritance diagram

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the diagram.

Extends

Name	Type	Description
PacketFilterBase	simple module	This is a base module for various packet filter modules. Derived modules must implement a single packet matcher function which determines if a packet is to be passed through or filtered out.

Parameters

Name	Type	Default value	Description
displayStringTextFormat	string	"dropped %d/%p pk (%k/%l)"	determines the text that is written on top of the submodule
backpressure	bool	false
mapping	object	{}	map of input streams to output streams, empty string means no stream, for example {s0: "s1", ...}
bufferSize	int	10	window size for sequence numbers per stream

Properties

Name	Value	Description
display	i=block/join
class	StreamMerger

Gates

Name	Direction	Size	Description
in	input
out	output

Signals

Name	Type	Unit
packetPushedIn	inet::Packet
packetPulledIn	inet::Packet
packetDropped	inet::Packet
packetPushedOut	inet::Packet
packetPulledOut	inet::Packet

Statistics

Name	Title	Source	Record	Unit	Interpolation Mode
flowDroppedPacketLengths	flow specific dropped packet lengths	packetLength(demuxFlow(packetDropped))	sum, histogram, vector	b	none
incomingDataRate	incoming data rate	throughput(merge(packetPushedIn, packetPulledIn))	vector	bps	linear
droppedPacketLengths	dropped packet lengths	packetLength(packetDropped)	sum, histogram, vector	b	none
incomingPacketLengths	incoming packet lengths	packetLength(merge(packetPushedIn, packetPulledIn))	sum, histogram, vector	b	none
droppedDataRate	dropped data rate	throughput(packetDropped)	vector	bps	linear
flowOutgoingPacketLengths	flow specific outgoing packet lengths	packetLength(demuxFlow(merge(packetPushedOut, packetPulledOut)))	sum, histogram, vector	b	none
flowDroppedDataRate	flow specific dropped data rate	throughput(demuxFlow(packetDropped))	vector	bps	linear
droppedPackets	dropped packets	packetDropped	count	pk
flowIncomingDataRate	flow specific incoming data rate	throughput(demuxFlow(merge(packetPushedIn, packetPulledIn)))	vector	bps	linear
outgoingDataRate	outgoing data rate	throughput(merge(packetPushedOut, packetPulledOut))	vector	bps	linear
outgoingPacketLengths	outgoing packet lengths	packetLength(merge(packetPushedOut, packetPulledOut))	sum, histogram, vector	b	none
flowIncomingPacketLengths	flow specific incoming packet lengths	packetLength(demuxFlow(merge(packetPushedIn, packetPulledIn)))	sum, histogram, vector	b	none
flowOutgoingDataRate	flow specific outgoing data rate	throughput(demuxFlow(merge(packetPushedOut, packetPulledOut)))	vector	bps	linear
incomingPackets	incoming packets	merge(packetPushedIn, packetPulledIn)	count	pk
outgoingPackets	outgoing packets	merge(packetPushedOut, packetPulledOut)	count	pk

Direct method calls (observed)

call to	function	info
MessageDispatcher	inet::MessageDispatcher::handleRegisterService	handleRegisterService
MessageDispatcher	inet::MessageDispatcher::pushPacket	pushPacket

Called methods (observed)

function	info	call from
inet::StreamMerger::pushPacket	pushPacket	StreamDecoder

Pushed in messages (observed)

gate	msg	kind	ctrl	srcModule	tags
in	Packet	0		StreamDecoder	DirectionTag, DispatchProtocolReq, DropEligibleInd, EncapsulationProtocolInd, InterfaceInd, MacAddressInd, PacketProtocolTag, PcpInd, SequenceNumberInd, StreamInd, UserPriorityInd, VlanInd

Push out messages (observed)

gate	msg	kind	ctrl	destModule	tags
out	Packet	0		MessageDispatcher	DirectionTag, DispatchProtocolReq, DropEligibleInd, EncapsulationProtocolInd, InterfaceInd, MacAddressInd, PacketProtocolTag, PcpInd, UserPriorityInd, VlanInd, SequenceNumberInd?, StreamInd?

Shared Tagging operations (observed)

tagType	tagAction
SequenceNumberInd	getTag, removeTag
StreamInd	findTag, getTagForUpdate, removeTag

Region Tagging operations (observed)

tagType	tagAction
FlowTag	mapAllTags

Source code

//
// This module merges the packets of the same stream by removing duplicates. In
// addition it also replaces the stream name on the packet based on the mapping
// parameter. For merging it maintains a separate finite buffer per stream with
// the last seen sequence numbers.
//
simple StreamMerger extends PacketFilterBase like IPacketFilter
{
    parameters:
        object mapping @mutable = default({}); // map of input streams to output streams, empty string means no stream, for example {s0: "s1", ...}
        int bufferSize = default(10); // window size for sequence numbers per stream
        @class(StreamMerger);
        @display("i=block/join");
}

File: src/inet/protocolelement/redundancy/StreamMerger.ned