Support SCAPY fuzz()

[nrathaus]

Hi,

To support SCAPY fuzz implementation a small fix is required (adding the access to default rather to self.flags):

    @property
    def has_twostepflag_set(self):
        if isinstance(self.flags, scapy.volatile.VolatileValue):
            return "TWO_STEP" in self.flags.default
        else:
            return "TWO_STEP" in self.flags

[weinshec]

Hi @nrathaus, and thanks for your suggestion. As I'm not familiar with scapy fuzz, could you maybe point me to some documentation / description?

[nrathaus]

Fuzz() is an internal mechanism of scapy to "play" around with values - trying to trigger exceptions in parsers of network data

Not a lot is needed by packet structure builders - I put a small fix to make yours work with it

You can easily try it out by doing
packet = fuzz(TCP())

And then if you do
packet.show() and show2 you can see the fuzzing fields

If you want to trigger a random data output you can use
bytes(packet)