ethernet application

[luk1990]

hello

id like to write an application for linux, where the same application running on 2 raspberry pi's is communicating via ethernet (lan).
the opponents ip address is manually typed in.

is there a beginner tutorial how to define messages and how to send them?
id prefer a c++ solution.

[DougieLawson]

Try this: https://www.google.co.uk/search?q=c%2B% ... er+example

[mfa298]

is there a beginner tutorial how to define messages and how to send them?
id prefer a c++ solution.

There's lots of tcp socket examples out there for C++, often they implement a basic chat server, if you can understand how they work then you can make your own. In terms of the message it's just a byte stream so you can define what you want.

Depending on the application you may also want to look at the various message brokers/queues (mqtt, rabbitmq etc). These often come with a library to make your code easier and can handle communication between multiple processes (good if your application might grow beyond two pis talking.