On Tue, Oct 15, 2002 at 08:33:20AM +0200, Mads Nielsen (DXD) wrote:
> However in most cases (when you not are fighting with low-level
> errors;-) I guess the average user would expect to see what are
> (supposed to be) sent on the wire.
They might, but that doesn't mean they'll be able to get what they
expect.
> I would recommend that PCAP (or WinPCAP) detects whether checksums are
> calculated below it on outgoing packets (based on OS and/or driver).
That is a significant amount of work, as
1) libpcap would have to, on several different platforms,
determine the type of networking interface *and* possibly
driver version (if not all versions of the driver for that
type of interface do offloading), so somebody would have to
figure out how to do that on all relevant platforms and
implement it;
2) somebody would have to find out which interfaces have that
problem on which OSes, and potentially keep that list
up-to-date if you really want to avoid having average users
ever getting rudely surprised.
1) *might* be easier on platforms where there's an interface flag
indicating whether offloading is being done; I don't know which, if any,
platforms do that.
2) runs the risk of being a perpetual task as new interfaces are
released.
I would not expect to see your recommendation implemented any time soon.
(I certainly don't have any interest in ever working on it, and there's
nothing anybody can say to encourage me to do it; if somebody wants it
that badly, I recommend that they do it themselves.)
