NED File src/inet/applications/tcpapp/TcpEchoApp.ned

Name	Type	Description
TcpEchoApp	simple module	Accepts any number of incoming TCP connections, and sends back the messages that arrive on them, The lengths of the messages are multiplied by echoFactor before sending them back (echoFactor=1 will result in sending back the same message unmodified.) The reply can also be delayed by a constant time (echoDelay parameter).
TcpEchoAppThread	simple module	Thread for TcpEchoApp

Source code

//
// Copyright (C) 2004 OpenSim Ltd.
//
// SPDX-License-Identifier: LGPL-3.0-or-later
//


package inet.applications.tcpapp;

//
// Accepts any number of incoming TCP connections, and sends back the
// messages that arrive on them, The lengths of the messages are
// multiplied by echoFactor before sending them back (echoFactor=1 will
// result in sending back the same message unmodified.) The reply can also be
// delayed by a constant time (echoDelay parameter).
//
// Compatible with both ~Ipv4 and ~Ipv6.
//
simple TcpEchoApp extends TcpServerHostApp
{
    parameters:
        @class(TcpEchoApp);
        double echoFactor = default(1);
        double echoDelay @unit(s) = default(0s);
        serverThreadModuleType = default("inet.applications.tcpapp.TcpEchoAppThread"); // module type of "thread" module to launch on incoming connections
        @signal[packetSent](type=inet::Packet);
        @signal[packetReceived](type=inet::Packet);
        @statistic[packetReceived](title="packets received"; source=packetReceived; record=count,"sum(packetBytes)","vector(packetBytes)"; interpolationmode=none);
        @statistic[packetSent](title="packets sent"; source=packetSent; record=count,"sum(packetBytes)","vector(packetBytes)"; interpolationmode=none);
        @statistic[endToEndDelay](title="end-to-end delay"; source="dataAge(packetReceived)"; unit=s; record=histogram,weightedHistogram,vector; interpolationmode=none);
}

// Thread for ~TcpEchoApp
simple TcpEchoAppThread
{
}