Re: How to read all traffic received on one network interface using Erlang

Ok, then it's kind of a device file, and of course it is, so stupid from
me, because my VM can boot and attach to it :-/

trying traditional way gives me {error,eisdir}:

> file:open
> file:read_file

As a perfect workaround, as long as open_port is working (I'm using
OTP/19), I will keep it:
http://erlang.org/download/otp_src_19.0.readme



*But I don't know for the latest OTP/23 and for the future OTP release,
because I see a lot of assert that it will be removed?Can one confirm that
please?*
Best Regards,

Le mer. 12 août 2020 à 22:41, Łukasz Niemier <[email protected]> a écrit :

> > 3/ Anyway, I hope I did not misunderstood, but I was undesrtanding that
> it was feasible to connect to an existing named pipe "allocated by mkfifo"
> via gen_udp/gen_tcp?
> > because for this, I always fail, since the named pipe has the same name
> as my unix-domain socket.
> >
> > {error, eaddrinuse} when listen , {error, econnrefused} when send
> >
> > ==> So my question is, How do you connect to an existing named pipe
> allocated by mkfifo, via gen_udp/gen_tcp, not using open_port?
>
> You treat named pipe as a **file** not socket. So you would use "regular"
> file and io functions for opening and reading content of file.
>
> > PS: I will try to understand socat and cap_net_raw as well later on :-p
>
> Socat is just a utility to pipe data to/from the sockets and cap_net_raw
> is needed when you do not want to run VM (or ports) as root.
>
> --
>
> Łukasz Niemier
> [email protected]
>
>