[En-Nut-Discussion] About Multicast packet receive

[Harald Kipp]

Ives,

yes, depending on the type of controller you are using,
you need to modify dev/nicrtl.c, dev/cs8900.c,
dev/lanc111.c or dev/wlandrv.c.

Possibly more had to be done on the other layers
too, but I do not know much about IP multicast.

ff:ff:ff:ff:ff:ff isn't really multicast but the
broadcast address, which is supported by default.

Harald

At 10:28 10.06.2004 +0100, you wrote:
>harald
>did u mean i need to modify the driver to receive the multicast packet?
>u say about the driver not support multicast, but i able to receive under
>ff:ff:ff:ff:ff:ff mac address,
>and also i able to send multicast packet, but not on receive it with if it
>was not using standard ff:ff:ff:ff:ff:ff mac address. (like cisco router
>broadcast).
>
>iVes
>
>
>
> > Ives,
> >
> > your observation is correct. In the current status
> > the Ethernet drivers do not support multicast.
> >
> > Ethernet controllers have special registers for
> > multicast mode, which need to be set during
> > initialization. In case you want to try that,
> > I'd be very interested in the results.
> >
> > Harald
> >
> >
> > At 09:27 10.06.2004 +0100, you wrote:
> > >I having problem on receive multicast UDP packet other then the
>destination
> > >ip 255.255.255.255 and *.*.*.255.
> > >but I was able to send boardcast UDP packet other then 255.255.255.255 by
>a
> > >little modify on ipout.c (net library) with multicast mac address.
> > >i do some tracing on packet arrive(ethernut board), found that all
>multicast
> > >packet other then x.x.x.255 or 255.255.255.255  been filter out(maybe it
> > >only recognize ff:ff:ff:ff:ff:ff mac address as boardcast packet and
>filter
> > >other out, but  i am not sure what happen), It dont have any response on
> > >ethin.c .
> > >
> > >any expert know what happenning, and how to enable me to do some
>multicast
> > >implementation.
> > >
> > >iVes
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