=== modified file 'include/linux/mroute.h'
--- old/include/linux/mroute.h	2009-08-10 11:17:32 +0000
+++ new/include/linux/mroute.h	2009-08-11 20:39:14 +0000
@@ -61,11 +61,13 @@
 	unsigned int vifc_rate_limit;	/* Rate limiter values (NI) */
 	struct in_addr vifc_lcl_addr;	/* Our address */
 	struct in_addr vifc_rmt_addr;	/* IPIP tunnel addr */
+	int ifindex;			/* Local interface index */
 };
 
 #define VIFF_TUNNEL	0x1	/* IPIP tunnel */
 #define VIFF_SRCRT	0x2	/* NI */
 #define VIFF_REGISTER	0x4	/* register vif	*/
+#define VIFF_USE_IFINDEX	0x8	/* use ifindex to find an interface */
 
 /*
  *	Cache manipulation structures for mrouted and PIMd

=== modified file 'net/ipv4/ipmr.c'
--- old/net/ipv4/ipmr.c	2009-08-10 11:17:32 +0000
+++ new/net/ipv4/ipmr.c	2009-08-11 22:15:24 +0000
@@ -470,6 +470,18 @@
 			return err;
 		}
 		break;
+	case VIFF_USE_IFINDEX:
+		dev = dev_get_by_index(net, vifc->ifindex);
+		if (!dev)
+			return -ENODEV;
+		if (dev->ip_ptr == NULL)
+			return -EADDRNOTAVAIL;
+		err = dev_set_allmulti(dev, 1);
+		if (err) {
+			dev_put(dev);
+			return err;
+		}
+		break;
 	case 0:
 		dev = ip_dev_find(net, vifc->vifc_lcl_addr.s_addr);
 		if (!dev)