Package: inet.queueing.buffer


simple module

This buffer drops packets among the connected packet queues based on their module id.

Inheritance diagram

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


Name Type Description
PacketBuffer simple module

This module provides packet storage for sharing and optimizing storage space between multiple packet queues. When a packet buffer becomes overloaded, the packet dropping strategy can drop any number of packets from any number of connected packet queues.


Name Type Default value Description
displayStringTextFormat string "contains %p pk (%l)\nadded %a removed %r dropped %d"

determines the text that is written on top of the submodule

packetCapacity int 100

maximum number of packets in the queue, no limit by default

dataCapacity int -1b

maximum total length of packets in the queue, no limit by default

dropperClass string "inet::queueing::PacketWithHighestOwnerModuleIdDropper"

determines which packets are dropped when the buffer is overloaded, packets are not dropped by default; the parameter must be the name of a C++ class which implements the IPacketDropperFunction C++ interface and is registered via Register_Class


Name Value Description
display i=block/buffer
class PacketBuffer


Name Direction Size Description
in input
out output


Name Type Unit
packetRemoved inet::Packet
packetDropped inet::Packet
packetAdded inet::Packet


Name Title Source Record Unit Interpolation Mode
droppedPacketsQueueOverflow dropped packets: queue overflow packetDropReasonIsQueueOverflow(packetDropped) count pk none
addedPackets added packets packetAdded count pk
removedPackets removed packets packetRemoved count pk
removedPacketLengths removed packet lengths packetLength(packetRemoved) sum, vector pk none
bufferLength buffer length warmup(count(packetAdded) - count(packetRemoved) - count(packetDropped)) last, max, timeavg, vector pk sample-hold
droppedPacketLengthsQueueOverflow dropped packet lengths: queue overflow packetLength(packetDropReasonIsQueueOverflow(packetDropped)) sum, vector b none
addedPacketLengths added packet lengths packetLength(packetAdded) sum, vector b none
bufferBitLength buffer bit length warmup(sum(packetLength(packetAdded)) - sum(packetLength(packetRemoved)) - sum(packetLength(packetDropped))) last, max, timeavg, vector b sample-hold

Direct method calls (observed)

call tofunctioninfo

Called methods (observed)

functioninfocall from

Source code

// This buffer drops packets among the connected packet queues based on their
// module id.
simple PriorityBuffer extends PacketBuffer
        packetCapacity = default(100);
        dropperClass = default("inet::queueing::PacketWithHighestOwnerModuleIdDropper");

File: src/inet/queueing/buffer/PriorityBuffer.ned