ExtLowerIpv4¶

Package: inet.emulation.networklayer.ipv4

compound module ExtLowerIpv4

Provides IPv4 layer functionality for network emulation that connects the simulation to a real network on the host computer. Sends packets from the simulation to the real network and receives packets from the real network into the simulation using raw sockets. Uses Ipv4Encap for packet encapsulation and ExtIpv4Socket for the connection to the host’s networking stack.

Usage diagram¶

Inheritance diagram¶

Used in compound modules¶

Name	Type	Description
ExtLowerIpv4NetworkLayer	compound module	Provides a simplified network layer for emulation that connects the simulation to a real network on the host computer. Uses ExtLowerIpv4 to send packets from the simulation to the real network and receive packets from the real network into the simulation using raw sockets.

Gates¶

Name	Direction	Size	Description
transportIn	input
transportOut	output
queueIn	input
queueOut	output

Unassigned submodule parameters¶

Name	Type	Default value	Description
encap.displayStringTextFormat	string	“”	Determines the text that is written on top of the submodule, supports displaying pars, watches, and module-specific information
socket.displayStringTextFormat	string	“snt:{numSent} rcv:{numReceived}”	Determines the text that is written on top of the submodule, supports displaying pars, watches, and module-specific information
socket.namespace	string	“”
socket.packetName	string	“Ext-%p-%t-%n”

Source code¶

//
// Provides IPv4 layer functionality for network emulation that connects
// the simulation to a real network on the host computer. Sends packets from
// the simulation to the real network and receives packets from the real network
// into the simulation using raw sockets. Uses ~Ipv4Encap for packet encapsulation
// and ~ExtIpv4Socket for the connection to the host's networking stack.
//
module ExtLowerIpv4 like IIpv4
{
    gates:
        input transportIn @labels(Ipv4ControlInfo/down,TcpHeader,UdpHeader,SctpHeader);
        output transportOut @labels(Ipv4ControlInfo/up,TcpHeader,UdpHeader,SctpHeader);
        input queueIn @labels(Ipv4Header,ArpPacket,Ieee802Ctrl);
        output queueOut @labels(Ipv4Header,ArpPacket,Ieee802Ctrl);
    submodules:
        encap: Ipv4Encap {
            parameters:
                @display("p=100,50");
        }
        socket: ExtIpv4Socket {
            parameters:
                @display("p=100,150");
        }
    connections allowunconnected:
        transportIn --> encap.upperLayerIn;
        transportOut <-- encap.upperLayerOut;
        encap.lowerLayerOut --> socket.upperLayerIn;
        encap.lowerLayerIn <-- socket.upperLayerOut;
}

File: src/inet/emulation/networklayer/ipv4/ExtLowerIpv4.ned