send packet on specific gate omnet++ - omnet++

Question

In omnet ++ while programing tic toc , if there are three nodes and all are connected to one another then how to send tic toc message to a specific node. for example i want to send message first to node A and then Node B and then Node C ; how would i code this.
#include <string.h>
#include <omnetpp.h>
int x=0;
class computerf : public cSimpleModule
{
protected:
virtual void initialize();
virtual void handleMessage(cMessage *msg);virtual void forwardMessage(cMessage *msg);
};
Define_Module(computerf);
void computerf::initialize()
{
if (strcmp("computer1", getName()) == 0)
{
cMessage *msg = new cMessage("tictocMsg");
forwardMessage(msg);
}
}
void computerf::handleMessage(cMessage *msg)
{
{
forwardMessage(msg);
}
}
void computerf::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 `out[]'.
int n = gateSize("out");
int k = intuniform(0,n-1);
EV << "Forwarding message " << msg << " on port out[" << k << "]\n";
send(msg, "out", 1);
EV <<"n is "<<n;
}
here in this code forwardMessage function sends message on random gate but i want to send message on specific gate.
this is the .ned file
simple computer
{
gates:
input in[2];
output out[2];
}
//
// TODO documentation
//
network Network
{
#display("bgb=545,242");
submodules:
A: computer {
#display("p=52,86");
}
B: computer {
#display("p=311,83");
}
C: computer {
#display("p=175,189");
}
connections:
A.out[0] --> B.in[0];
B.out[0] --> A.in[0];
A.out[1] --> C.in[1];
C.out[1] --> A.in[1];
C.out[0] --> B.in[1];
B.out[1] --> C.in[0];
}
basically i want node A to send message to node C and Node A to send message to node B simultaneously
if i use the hanlde message function
void computer::handleMessage(cMessage *msg)
{
send(msg, "out",0); //send(msg, "out",0);
}
now here in out send(msg, "out",0); i want to specify which "out" i want send message to node C and then to Node B but how?

Answer 1

The third parameter of the send(msg, "gate", index) is the actual gate index you can use while sending out messages on a vector gate. According to your NED file, send(msg, "out",0); sends the message to B while send(msg, "out",1); sends it to C.

Answer 2

You need to create those gates in Your ned file:
simple Txc
{
parameters:
#display("i=block/routing"); // add a default icon
gates:
input in1;
output out1;
input in2;
output out2;
}
network Tictoc
{
submodules:
tic: Txc {
parameters:
#display("i=,cyan");
}
toc: Txc {
parameters:
#display("i=,cyan");
}
toctic: Txc {
parameters:
#display("i=,cyan");
}
connections:
tic.out --> { delay = 100ms; } --> toc.in;
tic.in <-- { delay = 100ms; } <-- toc.out;
toctic.out2 --> { delay = 100ms; } --> toc.in2;
toctic.in2 <-- { delay = 100ms; } <-- toc.out2;
//....
}
With this You could send messages like this:
void computerf::forwardMessage(cMessage *msg)
{
int n = gateSize("out");
int k = intuniform(0,n-1);
send(msg, "out1", 1);
//Second message
send(msg, "out2", 1);
}
Hope this helps.
Best