txc12.cc

//
// This file is part of an OMNeT++/OMNEST simulation example.
//
// Copyright (C) 2003 Ahmet Sekercioglu
// Copyright (C) 2003-2015 Andras Varga
//
// This file is distributed WITHOUT ANY WARRANTY. See the file
// `license' for details on this and other legal matters.
//
 
#include <cstdio>
#include <cstring>
#include <omnetpp.h>
 
using namespace omnetpp;
 
/**
 * Let's make it more interesting by using several (n) `tic' modules,
 * and connecting every module to every other. For now, let's keep it
 * simple what they do: module 0 generates a message, and the others
 * keep tossing it around in random directions until it arrives at
 * module 2.
 */
class Txc12 : public cSimpleModule
{
  protected:
    virtual void forwardMessage(cMessage *msg);
    virtual void initialize() override;
    virtual void handleMessage(cMessage *msg) override;
};
 
Define_Module(Txc12);
 
void Txc12::initialize()
{
    if (getIndex() == 0) {
        // Boot the process scheduling the initial message as a self-message.
        char msgname[20];
        snprintf(msgname, sizeof(msgname), "tic-%d", getIndex());
        cMessage *msg = new cMessage(msgname);
        scheduleAt(0.0, msg);
    }
}
 
void Txc12::handleMessage(cMessage *msg)
{
    if (getIndex() == 3) {
        // Message arrived.
        EV << "Message " << msg << " arrived.\n";
        delete msg;
    }
    else {
        // We need to forward the message.
        forwardMessage(msg);
    }
}
 
void Txc12::forwardMessage(cMessage *msg)
{
    // In this example, we just pick a random gate to send it on.
    // We draw a random number between 0 and the size of gate `gate[]'.
    int n = gateSize("gate");
    int k = intuniform(0, n-1);
 
    EV << "Forwarding message " << msg << " on gate[" << k << "]\n";
    // $o and $i suffix is used to identify the input/output part of a two way gate
    send(msg, "gate$o", k);
}