[Winpcap-users] Is is possible to receive EAP packet without
bryan at kadzban.is-a-geek.net
Thu Sep 21 11:04:02 GMT 2006
> For Cisco switches, the destination MAC Address of EAP packet is
> 01-80-C2-00-00-02. In order to receive such packets, shall I set the
> Winpcap to work in promiscuous mode?
> In other words, is there a way to receive such EAP packets without
> promiscuous mode(with winpcap or other libraries)?
In this case, yes, I think there is. Join the correct multicast group.
That MAC corresponds to a multicast address. If you can get the NIC to
join that multicast group before the IP protocol is up, you should see
that traffic without promiscuous mode.
I have no idea whether this is possible (in Windows or any other OS),
though. Normally joining a multicast group is done at the IP layer, so
if IP isn't up yet, it may not be possible.
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