vagrant: add Vagrantfile to test native in FreeBSD

[miri64]

Contribution description

This provides a Vagrantfile for testing RIOT native in FreeBSD.

Testing procedure

Basically, follow the provided README.md. For the tapsetup stuff to work #14457 is required.

I also ran dist/tools/compile_and_run_for_board on it overnight, the results can be found here.

Basically there are some errors (but this does not block this PR), that can be summarized as such:

• Cross-compiling C++ for 32-bit (this seems to be not easily fixable at least not just by installing from ports, maybe another argument for native: 64-Bit support? #6603)
• Missing names like errno-values or GNU/Linux-specific functions such as backtrace
• Missing shell commands like sha512sum or bridge and other missing tooling
• POSIX definition clashes for pthreads
• Timing errors (maybe related to xtimer_usleep wrong delay time #10073)
• Some minor unexpected scheduling behavior as it seems
• Missing root privileges for tests that require it (easily fixed for non-automated runs ;-))
• Encoding formats that already in the past yielded different results for different toolchains like cayenne-lpp
• Incompatibilities in OS-specific scapy sublayer
• ...

All fixes that can be tackled as follow-ups (I will open a tracking issue if desired).

Issues/PRs references

None

[miri64]

Rebased and squashed to current master.

[leandrolanzieri]

When trying to run the network test indicated in the README I get the following:

make: Entering directory '/home/vagrant/RIOT/tests/gnrc_dhcpv6_client_6lbr'


/home/vagrant/RIOT/tests/gnrc_dhcpv6_client_6lbr/bin/native/tests_gnrc_dhcpv6_client_6lbr.elf -z [::1]:17754 tap0 
RIOT native interrupts/signals initialized.
LED_RED_OFF
LED_GREEN_ON
RIOT native board initialized.
RIOT native hardware initialization complete.

DHCPv6: Selecting interface 7 as upstream
main(): This is RIOT! (Version: 2020.10-devel-772-gf8d25-pr/no_archives)
> 
> 
> Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/threading.py", line 926, in _bootstrap_inner
    self.run()
  File "/usr/local/lib/python3.7/threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python3.7/site-packages/scapy/sendrecv.py", line 842, in _run
    *arg, **karg)] = iface
  File "/usr/local/lib/python3.7/site-packages/scapy/arch/bpf/supersocket.py", line 239, in __init__
    super(L2bpfListenSocket, self).__init__(*args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/scapy/arch/bpf/supersocket.py", line 62, in __init__
    (self.ins, self.dev_bpf) = get_dev_bpf()
  File "/usr/local/lib/python3.7/site-packages/scapy/arch/bpf/core.py", line 115, in get_dev_bpf
    raise Scapy_Exception("No /dev/bpf handle is available !")
scapy.error.Scapy_Exception: No /dev/bpf handle is available !

Exception ignored in: <function _L2bpfSocket.__del__ at 0x80271d830>
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/scapy/arch/bpf/supersocket.py", line 136, in __del__
    self.close()
  File "/usr/local/lib/python3.7/site-packages/scapy/arch/bpf/supersocket.py", line 208, in close
    if not self.closed and self.ins is not None:
AttributeError: 'L2bpfListenSocket' object has no attribute 'ins'

Traceback (most recent call last):
  File "/home/vagrant/RIOT/tests/gnrc_dhcpv6_client_6lbr/tests/01-run.py", line 173, in <module>
    sys.exit(run(testfunc, timeout=TIMEOUT, echo=True))
  File "/home/vagrant/RIOT/dist/pythonlibs/testrunner/__init__.py", line 30, in run
    testfunc(child)
  File "/home/vagrant/RIOT/tests/gnrc_dhcpv6_client_6lbr/tests/01-run.py", line 114, in testfunc
    pkt = wait_for_dhcpv6_pkt(iface)
  File "/home/vagrant/RIOT/tests/gnrc_dhcpv6_client_6lbr/tests/01-run.py", line 95, in wait_for_dhcpv6_pkt
    raise TimeoutError("Sniffing for DHCPv6 traffic timed out")
TimeoutError: Sniffing for DHCPv6 traffic timed out
make: *** [/home/vagrant/RIOT/tests/gnrc_dhcpv6_client_6lbr/../../Makefile.include:746: test] Error 1
make: Leaving directory '/home/vagrant/RIOT/tests/gnrc_dhcpv6_client_6lbr'

[miri64]

I pointed that out in OP though:

* Incompatibilities in OS-specific `scapy` sublayer

[leandrolanzieri]

I pointed that out in OP though:

* Incompatibilities in OS-specific `scapy` sublayer

Ok, but then why is that particular example used in the README, knowing that it will not work?

[miri64]

Ok, but then why is that particular example used in the README, knowing that it will not work?

Because I am stupid 😅 I used the first example found, not checking if it uses scapy or not. Will fix!

[miri64]

Actually the applications start, but communication does not work. Just another thing to figure out ;-). I reworded it now to refer to examples/gnrc_networking.

[leandrolanzieri]

Please squash @miri64 !

[leandrolanzieri]

I followed the instructions and got it working, also @miri64 has provided test output. Some follow-up work is needed but I see no reason not to merge this. ACK.

[miri64]

Squashed and added whitelisting to the build system sanity check.