the ip layer uses the presence of the .set_multicast_list to determine
if the underlying network device supports multicast.

Index: linux/net/atm/lec.c
===================================================================
RCS file: /home/chas/CVSROOT/linux/net/atm/lec.c,v
retrieving revision 1.7
diff -u -d -b -w -r1.7 lec.c
--- linux/net/atm/lec.c	24 Feb 2003 13:34:43 -0000	1.7
+++ linux/net/atm/lec.c	25 Feb 2003 11:49:42 -0000
@@ -617,6 +617,14 @@
         return 0;
 }
 
+static void lec_set_multicast_list(struct net_device *dev)
+{
+	/* by default, all multicast frames arrive over the bus.
+         * eventually support selective multicast service
+         */
+        return;
+}
+
 static void 
 lec_init(struct net_device *dev)
 {
@@ -626,7 +634,7 @@
         dev->hard_start_xmit = lec_send_packet;
 
         dev->get_stats = lec_get_stats;
-        dev->set_multicast_list = NULL;
+        dev->set_multicast_list = lec_set_multicast_list;
         dev->do_ioctl  = NULL;
         printk("%s: Initialized!\n",dev->name);
         return;
-
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