TunInterface¶

compound module TunInterface

Implements a (simulated) TUN network interface.

Usage diagram¶

Inheritance diagram¶

Used in compound modules¶

Name	Type	Description
LinkLayerNodeBase	compound module	An extension of the basic node infrastructure with link layer functionality. Provides support for various network interfaces and link layer protocols, forming the foundation for network connectivity.

Extends¶

Name	Type	Description
NetworkInterface	compound module	Serves as the base module for all network interfaces.

Parameters¶

Name	Type	Default value	Description
displayStringTextFormat	string	“%a (%i)\n%m”	Determines the text that is written on top of the submodule, supports displaying pars, watches, and module-specific information
recordPcap	bool	false
numPcapRecorders	int	recordPcap ? 1 : 0
isWireless	bool	false
interfaceTableModule	string
mtu	int	1500B

Properties¶

Name	Value	Description
class	NetworkInterface
display	i=block/tunnel
lifecycleSupport
networkInterface

Gates¶

Name	Direction	Size	Description
upperLayerIn	input
upperLayerOut	output

Signals¶

Name	Type	Unit	Description
packetDropped	inet::Packet

Statistics¶

Name	Title	Source	Record	Unit	Interpolation Mode	Description
packetDropInterfaceDown	packet drops: interface down	packetDropReasonIsInterfaceDown(packetDropped)	count,sum(packetBytes),vector(packetBytes)		none
packetDropNoCarrier	packet drops: no carrier	packetDropReasonIsNoCarrier(packetDropped)	count,sum(packetBytes),vector(packetBytes)		none

Unassigned submodule parameters¶

Name	Type	Default value	Description
pcapRecorder.displayStringTextFormat	string	“rec: %n pks”	Determines the text that is written on top of the submodule, supports displaying pars, watches, and module-specific information
pcapRecorder.verbose	bool	true	Whether to log packets on the module output
pcapRecorder.recordEmptyPackets	bool	true	Specifies if zero length packets are recorded or not
pcapRecorder.enableConvertingPackets	bool	true	Specifies if converting packets to link type is allowed or not
pcapRecorder.pcapFile	string	“”	The PCAP file to be written, suggested value: pcapFile = “${resultdir}/${configname}-#${runnumber}” + fullpath() + “.pcap”
pcapRecorder.fileFormat	string	“pcapng”
pcapRecorder.snaplen	int	65535	Maximum number of bytes to record per packet
pcapRecorder.timePrecision	int	6	Time precision in recorded file. pcap supports only 6 (usec) or 9 (nanosec), pcapng supports more values (see ‘if_tsresol’ option in pcapng file format).
pcapRecorder.dumpBadFrames	bool	true	Enable dump of frames with hasBitError
pcapRecorder.sendingSignalNames	string	“transmissionEnded”	Space-separated list of outbound packet signals to subscribe to
pcapRecorder.receivingSignalNames	string	“receptionEnded”	Space-separated list of inbound packet signals to subscribe to
pcapRecorder.dumpProtocols	string	“ethernetmac ppp ieee80211mac”	Space-separated list of protocol names as defined in the Protocol class
pcapRecorder.packetFilter	object	“*”	Which packets are considered, matches all packets by default
pcapRecorder.helpers	string	“”	Usable PcapRecorder::IHelper helpers for accept packettype and store/convert packet as specified linktype
pcapRecorder.alwaysFlush	bool	false	Flush the pcapFile after each write to ensure that all packets are captured in case of a crash
tun.displayStringTextFormat	string	“”	Determines the text that is written on top of the submodule, supports displaying pars, watches, and module-specific information
tun.interfaceTableModule	string		The path to the InterfaceTable module
tun.mtu	int	1500B

Source code¶

//
// Implements a (simulated) TUN network interface.
//
module TunInterface extends NetworkInterface like ITunnelInterface
{
    parameters:
        bool isWireless = default(false);
        string interfaceTableModule;
        int mtu @unit(B) = default(1500B);
        *.interfaceTableModule = default(absPath(this.interfaceTableModule));
        @display("i=block/tunnel");
    gates:
        input upperLayerIn;
        output upperLayerOut;
    submodules:
        tun: Tun {
            parameters:
                @display("p=300,100");
        }
    connections:
        upperLayerIn --> { @display("m=n"); } --> tun.upperLayerIn;
        tun.upperLayerOut --> { @display("m=n"); } --> upperLayerOut;
}

File: src/inet/linklayer/tun/TunInterface.ned