UdpEchoApp

simple module

Listens on an UDP port, and sends back each received packet to its sender. Note: when used together with UdpBasicApp, UdpBasicApp's "received packet lifetime" statistic will record round-trip times.

Inheritance diagram

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

Parameters

Name	Type	Default value	Description
interfaceTableModule	string		The path to the InterfaceTable module
localPort	int		local port to listen on
stopOperationExtraTime	double	-1s	extra time after lifecycle stop operation finished
stopOperationTimeout	double	2s	timeout value for lifecycle stop operation

Properties

Name	Value	Description
display	i=block/app
lifecycleSupport

Gates

Name	Direction	Size	Description
socketIn	input
socketOut	output

Signals

Name	Type	Unit
packetSent	inet::Packet

Statistics

Name	Title	Source	Record	Unit	Interpolation Mode
echoedPk	packets echoed	packetSent	count, sum(packetBytes), vector(packetBytes)		none

Direct method calls (observed)

call to	function	info
MessageDispatcher	inet::MessageDispatcher::arrived	arrived

Incoming messages (observed)

gate	msg	kind	ctrl	srcModule	tags
socketIn	Indication	1 (UdpStatusInd::UDP_I_ERROR)	UdpErrorIndication	Udp	L3AddressInd, L4PortInd, SocketInd
socketIn	Packet	0 (UdpStatusInd::UDP_I_DATA)		Udp	DscpInd, EcnInd, HopLimitInd, InterfaceInd, L3AddressInd, L4PortInd, NetworkProtocolInd, SocketInd, TosInd, TransportProtocolInd, DispatchProtocolInd?, ErrorRateInd?, Ieee802SapInd?, MacAddressInd?, SignalPowerInd?, SignalTimeInd?, SnirInd?, Ieee80211ChannelInd?, Ieee80211ModeInd?

Outgoing messages (observed)

gate	msg	kind	ctrl	destModule	tags
socketOut	Packet	0 (UdpCommandCode::UDP_C_DATA)		Udp	DispatchProtocolReq, L3AddressReq, L4PortReq, SocketReq
socketOut	Request	1 (UdpCommandCode::UDP_C_BIND)	UdpBindCommand	Udp	DispatchProtocolReq, SocketReq
socketOut	Request	3 (UdpCommandCode::UDP_C_SETOPTION)	UdpJoinMulticastGroupsCommand	Udp	DispatchProtocolReq, SocketReq

Packet operations (observed)

chunkType	packetAction
	trim

Shared Tagging operations (observed)

tagType	tagAction
	clearTags
DispatchProtocolReq	addTagIfAbsent
L3AddressInd	getTag
L3AddressReq	addTagIfAbsent
L4PortInd	getTag
L4PortReq	addTagIfAbsent
SocketInd	findTag
SocketReq	addTagIfAbsent

Tagging operations (observed)

tagType	tagAction
inet::Ipv4InterfaceData	findTag

Source code

//
// Listens on an UDP port, and sends back each received packet to its sender.
// Note: when used together with ~UdpBasicApp, ~UdpBasicApp's "received packet
// lifetime" statistic will record round-trip times.
//
simple UdpEchoApp like IApp
{
    parameters:
        string interfaceTableModule;   // The path to the InterfaceTable module
        int localPort;  // local port to listen on
        @display("i=block/app");
        @lifecycleSupport;
        double stopOperationExtraTime @unit(s) = default(-1s);    // extra time after lifecycle stop operation finished
        double stopOperationTimeout @unit(s) = default(2s);    // timeout value for lifecycle stop operation
        @signal[packetSent](type=inet::Packet);
        @statistic[echoedPk](title="packets echoed"; source=packetSent; record=count,"sum(packetBytes)","vector(packetBytes)"; interpolationmode=none);
    gates:
        input socketIn @labels(UdpControlInfo/up);
        output socketOut @labels(UdpControlInfo/down);
}

File: src/inet/applications/udpapp/UdpEchoApp.ned