c++ - (OMNeT++) Cannot Find Serializer

Question

Using OMNeT++ I modified the UdpBasicApp.cc file adding this code:

cModule *mod = getModuleByPath("^.ppp[0].ppp.queue");                 
queueing::PacketQueue *queue = check_and_cast<queueing::PacketQueue*>(mod);
int e = queue->getNumPackets();                                                
int f = queue->getMaxNumPackets();                                          

simtime_t queueRetrieveTime = simTime();

Packet *queueRetrieve = new Packet("Queue_Info");
if(dontFragment)
    queueRetrieve->addTag<FragmentationReq>()->setDontFragment(true);
const auto& payload1 = makeShared<QueueInfoMessage>();
payload1->setChunkLength(B(1000));
payload1->setQueueLength(e);
payload1->setQueueMaxLength(f);
payload1->setTimeOfRetrieve(queueRetrieveTime);
payload1->addTag<CreationTimeTag>()->setCreationTime(simTime());
queueRetrieve->insertAtBack(payload1);
L3Address destAddr1 = chooseDestAddr();
socket.sendTo(queueRetrieve, destAddr1, destPort);

I copied this from the handleMessage() function in UdpBasicApp.cc, and I've put this at the start of the already mentioned function, before everything else.

The message I'm trying to send is a message I created myself, and the QueueInfoMessage.msg file is this:

import inet.common.INETDefs;
import inet.common.packet.chunk.Chunk;
namespace inet;

cplusplus {{
    const B YOUR_APP_HEADER_LENGTH = B(6);
}}

class QueueInfoMessage extends FieldsChunk
{
    chunkLength = YOUR_APP_HEADER_LENGTH;
    int queueLength;
    int queueMaxLength;
    simtime_t timeOfRetrieve;
    uint32_t sequenceNumber;
}

As I've learned from this thread here.

When I run the simulation I get this error:

Cannot find serializer for inet::QueueInfoMessage in module (inet::Ipv4) Network.router3.ipv4.ip (id=...), ...

The message I created was copied from a standard message, ApplicationPacket.msg (used in the same handleMessage() function of the file), to be sure there were no errors, and I added some additional variables to do what I wanted to do.

Why do I get this error? (Btw I don't know what the serializer is or does)

question from:https://stackoverflow.com/questions/65908146/omnet-cannot-find-serializer

Answer 1

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