Ethereal-dev: Re: [Ethereal-dev] Increasing the capture buffer size on win32 systems?
Ethereal development <ethereal-dev@xxxxxxxxxxxx> schrieb am 09.03.04 08:30:37:
>
> On Mon, Mar 08, 2004 at 10:10:41PM +0100, Ulf Lamping wrote:
> > So Ethereal (and tethereal too?) on win32 will have significant packet
> > drops on high traffic networks,
> > as the driver's buffer (default 1000KB) is just too small.
> >
> > WinPcap offers to increase this buffer size, so I tend to include some
> > way of increasing this size.
> >
> > What do others think?
>
> That would probably be reasonable.
>
> There is currently no standard libpcap API for that (WinPcap's API for
> doing that is unimplementable on BPF, as, with BPF, you cannot change
> the buffer size once you've bound a network device to the BPF device,
> and that binding happens at open time, so you can't change the buffer
> size once you've opened a device; at some point I plan to add a new API
> for opening devices that would let you specify a buffer size at open
> time), so it'd be Win32-only, for now - but don't do anything to make it
> difficult to make it work on UNIX as well in future releases (or do
> something such as having it explicitly say it's Win32-only in the GUI).
>
We might want to include this in the capture options dialog in some way (and for win32 only, like in the print dialog). On other systems, this GUI widget wouldn't be shown at all.
I'll have a look at it, when finished the Add expression thing.
(I'm currently very busy at work, so less time for Ethereal things :-(
> As for doing it on the command line in Tethereal, do it with a "-B" flag
> on the command line, for compatibility with WinDump - unfortunately,
> "-B" *currently* sets the byte view pane height in Ethereal, but perhaps
> we should have some other flag for that and have "-B" set the capture
> buffer size.
>
We might experiment with the GUI setting first, and think about command line things later,
when the GUI is ok.
Regards, ULFL
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