setKind() not taken into account - c++

Question

I'm trying to Identify a message by using the getKind() function, I've previously defined my own DATA_KIND
for sending:
DataM *data = new DataM();
data ->setKind(DATA_KIND);
data ->setSrc(this->getParentModule()->getIndex());
socket.sendTo(data, destAddr, destPort);
for receiving which it bypasses but is received as as a UDP_I_DATA
bypasses this:
else if (msg->getKind() == DATA_KIND) {
// process incoming packet;
}
and uses this:
else if (msg->getKind() == UDP_I_DATA) {
// process incoming packet;
}
Please help!
I have tried adding the DATA_KIND value to the .h files and to the .cc files, I thought it was about the scope, it didn't work

Answer 1

You cannot use setKind()/getKind() to carry out own information across the whole network in INET. Kind is a metadata that is used mainly between modules inside a device - to inform about the status of a packet. Therefore UDP layer always sets the value of kind for received packets (e.g.UDP_I_DATA, UDP_I_ERROR).
I suggest introducing own packet with the field that will determine the type, e.g. 1 - MY_DATA, 2 - MY_CONTROL, etc.
An example:
packet DataM {
int myType; // own type
// other data
int otherData;
}
Then in your code you may use:
// somewhere in *.h
#define MY_DATA 1
#define MY_CONTROL 2
// in *.cc - sending
DataM *data = new DataM();
data->setMyType(MY_DATA);
// in *.cc - receiving
DataM *data2 = dynamic_cast<DataM*>(msg);
if (data2 != nullptr) {
if (data2->getMyType == MY_DATA) {
// MY_DATA - do something
}
}
References:
OMNeT++ Simulation Manula - 6 Message Definitions
TicToc Tutorial - 4.4 Defining our message class