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Promiscuous Ethernet problem

Hi there!

I'm working on an application for the ETRAX 100 LX, which is
supposed to read all packets from the Ethernet port.

The ETRAX is out-of-the-box, except two things:
I have set an IP address in /etc/network/network.cnf.
My application resides on /mnt/flash.

I open a raw socket, and set the interface to promiscuous mode
using setsockopt.
When I start the program, I get a message on the serial debug port
telling me that "device eth0 entered promiscuous mode".

When I terminate the program, I get the message
"device eth0 left promiscuous mode".

However, the only packets received by my application are those
addressed to the ETRAX's own MAC address or the broadcast
address (ff:ff:ff:ff:ff:ff).

What am I doing wrong?

Here's how I set up the interface:

int s;
struct packet_mreq pr;
struct ifreq ir;

s = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
ioctl(s, SIOCGIFINDEX, &ir);
pr.mr_ifindex = ir.ifr_ifindex;
pr.mr_type = PACKET_MR_PROMISC;
           &pm, sizeof(struct packet_mreq));

None of the system calls fail, and as I said above, the OS reports
that the interface has gone promiscuous.

Any help is appreciated.

/Ulf Sjöstedt
SaabTech Systems