Re: [BUG] pcap-usb-linux.c

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

Hi, any chance that a "usbany" (or similar) pseudo-device could be added in
a future version to capture on all USB buses, similar to the standard "any"
device for non-USB interfaces?

Thanks, Tyson.

On Mon, Nov 24, 2008 at 8:10 PM, Guy Harris <guy () alum mit edu> wrote:

> On Oct 29, 2008, at 7:38 PM, Jean-Louis wrote:
>
>  in accordance with usbmon.txt in "mmap mode" the data is at
> > &mmap_area[vec[i]] + 64;
> >
> > rather than
> >
> > &mmap_area[vec[i]] + 48;
> >
> > with mmap ther'is 16Byte filled with 0 first to the real data...
> >
> > so if i.e. I have caplen = 18Byte, in file.pcap I have 16Byte with garbage
> > (0x00) and only 2Byte with real data other 16Byte of real data is lost.
> >
> > the mmap mode is *default* with kernel >= 2.6.25-rc8-mm1
> >
> > I'm newbie with libpcap and I don't know how I can fix that without
> > degrading performance
>
> The only way to fix that without doing a lot of copying would be to add a
> new DLT_ value for Linux mmapped access, with the USB header defined to
> include the padding (and change apps that handle USB captures to handle the
> new DLT_ value).-
>
> This is the tcpdump-workers list.
> Visit https://cod.sandelman.ca/ to unsubscribe.



-- 
Fight Internet Censorship! http://www.eff.org
              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Open-Source Community, and Technology Testbed: http://i9.house404.co.uk/
-
This is the tcpdump-workers list.
Visit https://cod.sandelman.ca/ to unsubscribe.