DirectionReverserLayer¶

compound module DirectionReverserLayer

Provides a layer that combines the decision for local delivery with the service of reversing the direction of an incoming packet to outgoing for packet forwarding.

Usage diagram¶

Inheritance diagram¶

Used in compound modules¶

Name	Type	Description
BridgingLayer	compound module	Provides various layer 2 services such as packet forwarding, interface selection, virtual LAN handling, stream handling.

Parameters¶

Name	Type	Default value	Description
interfaceTableModule	string		Relative module path of the interface table

Properties¶

Name	Value	Description
display	i=block/layer

Gates¶

Name	Direction	Size	Description
upperLayerIn	input
upperLayerOut	output
lowerLayerIn	input
lowerLayerOut	output

Unassigned submodule parameters¶

Name	Type	Default value	Description
fork.displayStringTextFormat	string	“processed {numProcessedPackets} pk ({processedTotalLength})”	Determines the text that is written on top of the submodule, supports displaying pars, watches, and module-specific information
fork.interfaceTableModule	string		Module path to the InterfaceTable module
fork.forwardProtocolRegistration	bool	true
fork.interfaceMapping	object	{}	Maps network interface names to connected submodule names (e.g. {“eth0”: “bridging”}), overrides automatically learned dispatching; * overrides all learned network interfaces, ? overrides default
fork.serviceMapping	object	{}	Maps protocols to connected submodule names (e.g. {“ethernetmac”: “bridging”}), overrides automatically learned dispatching; * overrides all learned services, ? overrides default
fork.protocolMapping	object	{}	Maps protocols to connected submodule names (e.g. {“ipv4”: “bridging”}), overrides automatically learned dispatching; * overrides all learned protocols, ? overrides default
reverser.displayStringTextFormat	string	“processed {numProcessedPackets} pk ({processedTotalLength})”	Determines the text that is written on top of the submodule, supports displaying pars, watches, and module-specific information
reverser.forwardVlan	bool	true
reverser.forwardPcp	bool	true
reverser.excludeEncapsulationProtocols	object	[]
join.displayStringTextFormat	string	“passed %p pk (%l)”	Determines the text that is written on top of the submodule, supports displaying pars, watches, and module-specific information
join.forwardServiceRegistration	bool	true

Source code¶

//
// Provides a layer that combines the decision for local delivery
// with the service of reversing the direction of an incoming packet to outgoing
// for packet forwarding.
//
module DirectionReverserLayer like IProtocolLayer
{
    parameters:
        string interfaceTableModule; // Relative module path of the interface table
        *.interfaceTableModule = default(this.interfaceTableModule);
        @display("i=block/layer");
    gates:
        input upperLayerIn;
        output upperLayerOut;
        input lowerLayerIn;
        output lowerLayerOut;
    submodules:
        cutthroughBarrier: <default("")> like IPacketDelayer {
            @display("p=100,150");
        }
        fork: MessageDispatcher {
            forwardServiceRegistration = false;
            @display("p=100,300;i=-;b=10,10,oval,grey,,1");
        }
        delayer: <default("")> like IPacketDelayer {
            @display("p=300,300");
        }
        reverser: <default("PacketDirectionReverser")> like IPacketFlow {
            @display("p=500,300");
        }
        join: PacketMultiplexer {
            forwardProtocolRegistration = false;
            @display("p=700,300");
        }
    connections:
        upperLayerIn --> { @display("m=n"); } --> join.in++;
        join.out --> { @display("m=s"); } --> lowerLayerOut;

        lowerLayerIn --> { @display("m=s"); } --> fork.in++;
        fork.out++ --> cutthroughBarrier.in;
        cutthroughBarrier.out --> { @display("m=n"); } --> upperLayerOut;

        fork.out++ --> delayer.in;
        delayer.out --> reverser.in;
        reverser.out --> join.in++;
}

File: src/inet/linklayer/ethernet/common/DirectionReverserLayer.ned