# txc10.cc

    //
    // This file is part of an OMNeT++/OMNEST simulation example.
    //
    // Copyright (C) 2003 Ahmet Sekercioglu
    // Copyright (C) 2003-2005 Andras Varga
    //
    // This file is distributed WITHOUT ANY WARRANTY. See the file
    // `license' for details on this and other legal matters.
    //

    #include <stdio.h>
    #include <string.h>
    #include <omnetpp.h>

    // Include a generated file: the header file created from tictoc10.msg.
    // It contains the definition of the TictocMsg10 class, derived from
    // cMessage.
    #include "tictoc10_m.h"

    class Txc10 : public cSimpleModule
    {
      protected:
        virtual TicTocMsg10 *generateMessage();
        virtual void forwardMessage(TicTocMsg10 *msg);
        virtual void initialize();
        virtual void handleMessage(cMessage *msg);
    };

    Define_Module(Txc10);

    void Txc10::initialize()
    {
        // Module 0 sends the first message
        if (index()==0)
        {
            // Boot the process scheduling the initial message as a self-message.
            TicTocMsg10 *msg = generateMessage();
            scheduleAt(0.0, msg);
        }
    }

    void Txc10::handleMessage(cMessage *msg)
    {
        TicTocMsg10 *ttmsg = check_and_cast<TicTocMsg10 *>(msg);

        if (ttmsg->getDestination()==index())
        {
            // Message arrived.
            ev << "Message " << ttmsg << " arrived after " << ttmsg->getHopCount() << " hops.\n";
            bubble("ARRIVED, starting new one!");
            delete ttmsg;

            // Generate another one.
            ev << "Generating another message: ";
            TicTocMsg10 *newmsg = generateMessage();
            ev << newmsg << endl;
            forwardMessage(newmsg);
        }
        else
        {
            // We need to forward the message.
            forwardMessage(ttmsg);
        }
    }

    TicTocMsg10 *Txc10::generateMessage()
    {
        // Produce source and destination addresses.
        int src = index();   // our module index
        int n = size();      // module vector size
        int dest = intuniform(0,n-2);
        if (dest>=src) dest++;

        char msgname[20];
        sprintf(msgname, "tic-%d-to-%d", src, dest);

        // Create message object and set source and destination field.
        TicTocMsg10 *msg = new TicTocMsg10(msgname);
        msg->setSource(src);
        msg->setDestination(dest);
        return msg;
    }

    void Txc10::forwardMessage(TicTocMsg10 *msg)
    {
        // Increment hop count.
        msg->setHopCount(msg->getHopCount()+1);

        // Same routing as before: random gate.
        int n = gate("out")->size();
        int k = intuniform(0,n-1);

        ev << "Forwarding message " << msg << " on port out[" << k << "]\n";
        send(msg, "out", k);
    }