# Raw socket programming challenge

How to send a pure ethernet packet?

Let us know in your favorite programming language!


## What are we expecting?

A layer 2 ethernet frame is constructed in the following way.

```
[Destination MAC: 6 bytes][Source MAC: 6 bytes][Protocol: 2 bytes][Message: ZeusWPI is de max!]
```
For example 
```python
\xff\xff\xff\xff\xff\xff \x12\xab\x34\xcd\x56 \x60\x00  \x5a\x45\x75\x53...
   Broadcast Dest MAC   |     Source MAC     | Protocol | Your binary message
```

Send that frame with the message `ZeusWPI is de max!` over the same network interface that the listener is listening on and it will confirm that you completed the challenge!

You can then put your code in a folder with the name of the programming language providing instructions on how to run it.



## How to
We are providing some code that will listen to any packets received. It will give you a confirmation if you completed the challenge.

The only python package requirement is `netifaces`. 
Install with the command `pip install --user netifaces`

Create a file named `.env` with the following line `INTERFACE=YOUR_NETWORK_INTERFACE`

* Run the listener with `sudo make listener`

* We also provide an example client in python. Run it with `sudo make example-sender`