BackPressureBasedFilter

simple module

Implements a packet filter that drops packets when the following module (consumer) does not allow packets to be pushed. The module itself accepts all packets (i.e. canPushPacket() and canPushSomePacket() always return true). This is useful, for example, when the following module is a gate to filter out packets when the gate is closed.

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	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, supports displaying pars, watches, and module-specific information
backpressure	bool	false

Properties

Name	Value	Description
class	BackPressureBasedFilter
display	i=block/downarrow

Gates

Name	Direction	Size	Description
in	input
out	output

Signals

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

Statistics

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

Source code

//
// Implements a packet filter that drops packets when the following module (consumer)
// does not allow packets to be pushed. The module itself accepts all packets (i.e. `canPushPacket()`
// and `canPushSomePacket()` always return true). This is useful, for example, when the following
// module is a gate to filter out packets when the gate is closed.
//
simple BackPressureBasedFilter extends PacketFilterBase like IPacketFilter
{
    parameters:
        @class(BackPressureBasedFilter);
}

File: src/inet/queueing/filter/BackPressureBasedFilter.ned