Re: tcpdump 4.0.0 + libpcap 1.0.0 Released

["Tyson Key" <tyson.key () gmail com>]

Hi again, Guy. I've just been doing some strace-ing, and it appears to doing
a "open("/dev/usbmon2", O_RDONLY|O_LARGEFILE) = 3". Not sure if the script
log will be of use to you, although I'll attach it anyway.
Going to try the printf() kludge soon.

Tyson.

On Thu, Oct 30, 2008 at 12:27 AM, Guy Harris <guy () alum mit edu> wrote:

> On Oct 29, 2008, at 1:16 PM, Tyson Key wrote:
>
>  Also, is it considered normal for Linux 2.6.25 and above (or libpcap,
> > although I'm not sure exactly what to blame) to truncate large numbers of
> > USB packets? (I assume this has been hashed to death on the list in the
> > past, though).
>
> Paolo?  Could it be using the text interface rather than the binary
> interface?  I think I remember you indicating that the text interface
> doesn't supply the full packet.
>
> Tyson, you said you were using the CVS version of libpcap (presumably
> meaning top-of-tree CVS, the pcap-usb-linux.c of which is identical to 1.0's
> pcap-usb-linux.c), so presumably you built it from source.  You might want
> to stick some debugging printfs into usb_activate() to see whether it uses
> mmap access to the binary interface, non-mmap access to the binary
> interface, or the text interface.
>
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