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Re: libnet-pcap-perl ??

On Wed, 6 Apr 2005, Brian Dessent wrote:

> Brian Ford wrote:
> > > The problem with all this is that the winpcap DLLs are compiled with
> > > Mingw and depend on msvcrt, so if you want to use them with Cygwin apps
> > > you have to recompile them to use cygwin1.dll.  If you don't do this,
> > > the libpcap application (Net::Pcap in this case) will compile but fail
> > > to run correctly.
> >
> > Just curious what this really means.  I use the winpcap DLLs daily in a
> > Cygwin appliction (custom, not Perl) without incident.  Am I just lucky?
> I'm not entirely sure either. :-)  I too have "fudged it" and gotten
> some apps to work, but with strage behavior sometimes.  Run cygcheck on
> the app and see if it's loading both cygwin1.dll and msvcr*.dll, if so
> then it's luck.  I think it mostly tends to work because the winpcap
> stuff doesn't call the C runtime for much.

Sorry.  I forgot that I'm actually using LoadLibrary here.  But,

$ cygcheck ./wpcap.dll

So the dependency comes from winsock?  It doesn't sound like that is
avoidable?  That pthreadVC.dll is a bit scary too.

Also, the app in question uses a tiny portion of the ddraw.dll, which also
depends on msvcrt.dll.  I can't believe *this* is really not supported.

Brian Ford
Senior Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
the best safety device in any aircraft is a well-trained pilot...

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