[Ns-developers] Requesting help for csma promiscuous mode

[Mathieu Lacage]

On Mon, 2008-07-07 at 11:23 -0700, craigdo at ee.washington.edu wrote:

> I think that linux has a number of bits that you can set to enable various
> promiscuity levels:  RxStation, RxMulticast, RxBroadcast, RxProm.

Really ? Where did you see that ? The only promiscuous things I know
about are from "man ifconfig":

[-]promisc
    Enable  or  disable  the  promiscuous mode of the interface.  If
    selected, all packets on the network will  be  received  by  the
    interface.

and, looking at the include/linux/netdevice.h header, I see only a
single promiscuity count, not a mask for different levels (see
__dev_set_promiscuity in net/core/dev.c)

There is an "allmulti" mode but that seems orthogonal to promisc mode
(i.e., send up all multicast packets without filtering)

> Anyway, I think having devices always in promiscuous mode is weird.

agreed.

Mathieu