Re: Current wireless-testing breaks libpcap:

[Jiri Pirko <jpirko () redhat com>]

Sat, Mar 06, 2010 at 10:23:12PM CET, guy () alum mit edu wrote:
> On Mar 2, 2010, at 5:00 PM, Pavel Roskin wrote:
>
> > This patch to libpcap helps:
> >
> > --- a/pcap-linux.c
> > +++ b/pcap-linux.c
> > @@ -1563,6 +1563,7 @@ live_open_new(pcap_t *handle, const char
> >                      memset(&mr, 0, sizeof(mr));
> >                      mr.mr_ifindex = handle->md.ifindex;
> >                      mr.mr_type    = PACKET_MR_PROMISC;
> > +                    mr.mr_alen    = 6;
>
> If there are any network types that support promiscuous mode and have link-layer addresses that aren't 6 octets long, 
> that would still fail.
>
> It sounds as if the fix is not to care about the address length if the address isn't used, so you don't need to get 
> the length right for PACKET_MR_PROMISC or PACKET_MR_ALLMULTI, so libpcap, and other clients setting promiscuous or 
> "show me all multicast packets" mode, don't need to change.  Is that the case?

This should be fixed in kernel (net-2.6
1162563f82b434e3099c9e6c1bbdba846d792f0d)

Jirka
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