Fw: listing all devs

["Loris Degioanni" <loris () netgroup-serv polito it>]

Hi,


> On Mon, May 12, 2003 at 09:14:11AM +0200, Fulvio Risso wrote:
> > >  List all capture files in dir: tcpdump -i file://dir/?
> >
> > This is actually unsupported. It should be a good suggestion.
>
> > However, this is a pain from the implementation point of view, since
> > file listing is platform independent.
>
> (Presumably you meant "platform dependent".)
>
> > SO, your code will have tons of
> > "#define" and this is something I would like to avoid (basically because
> > I'm using only Win32, Linux and BSD, and I'm not able to implement and
> > test the code on other platforms).
>
> Any UNIX so old as not to have "readdir()" isn't likely to be
> interesting for libpcap, so all you have to worry about is Win32 and
> UNIX.
>
> However, the problem then is that to list all capture files you'd have
> to try to open *all* files in the directory and see which ones are
> libpcap-format files - at least on UNIX, there's no guarantee that you
> can determine the file type based purely on the file extension, and, as
> you can move files between UNIX and Windows, there's really no such
> guarantee on Windows, either.

Yes, but I don't see this like a terrible problem. I agree that you need to
open the file, but understanding if it's a libpcap capture is quite easy
thanks to the magic number at the beginning of the file.

Loris

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