Can't extend FieldsChunk class (from INET) inside .msg file

Question

I need to make a MANET routing protocol, so I'm looking at GPSR and DSDV source code in INET to get an insight of how to do it.

I checked the files DsdvHello.msg and Gpsr.msg where the classes that represent packets of these protocols are defined. Those classes extend FieldsChunk class. I assumed that I had to define the packets of my protocol the same way, so I made the file Protocolo.msg in my project like the following.

cplusplus {{
#include "inet/common/packet/chunk/FieldsChunk.h"
#include "inet/networklayer/contract/ipv6/Ipv6Address.h"
}}

class FieldsChunk;
class Ipv6Address;

class Hola extends FieldsChunk {

    Ipv6Address ip;
    string ubicacion;
}

class Adios extends FieldsChunk {

    Ipv6Address ip;
}

I'm not sure if I'm doing right, but I'm doing it as I see in DsdvHello.msg and Gpsr.msg and the Message Definitions chapter in the OMNeT++ Simulation Manual.

I selected INET in Project>Properties>Project References, but when I build my project, I get the message fatal error: inet/common/packet/chunk/FieldsChunk.h: No such file or directory when it tries to compile my .msg file.

I also have a NED file that uses IManetRouting (also from INET) without problems, but for some reason it doesn't find FieldsChunk.h and IPv6Address.h inside the .msg file.

Can anyone tell me if I need to do anything else so that I can use those classes in my .msg file?

Jerzy D. Jerzy D. · Accepted Answer · 2020-02-05T14:38:14

Change Protocolo.msg into:

import inet.common.INETDefs;
import inet.common.packet.chunk.Chunk;
import inet.networklayer.contract.ipv6.Ipv6Address;

namespace inet;

class Hola extends FieldsChunk {
  Ipv6Address ip;
  string ubicacion;
}

class Adios extends FieldsChunk {
  Ipv6Address ip;
}

Then go to Properties of your project, select OMNeT++ | Makemake | src folder | Options... and:
- in Compile tab check "Add include paths exported from referenced projects"
- in Custom tab add the following line:
```
MSGC:=$(MSGC) --msg6
```

Can't extend FieldsChunk class (from INET) inside .msg file

1 Answers