Index: kernel-source-2.5/include/linux/rtnetlink.h
===================================================================
RCS file: /home/gondolin/herbert/src/CVS/debian/kernel-source-2.5/include/linux/rtnetlink.h,v
retrieving revision 1.5
diff -u -r1.5 rtnetlink.h
--- kernel-source-2.5/include/linux/rtnetlink.h	18 Oct 2003 07:12:47 -0000	1.5
+++ kernel-source-2.5/include/linux/rtnetlink.h	2 Dec 2003 10:52:34 -0000
@@ -200,6 +200,7 @@
 	RTA_FLOW,
 	RTA_CACHEINFO,
 	RTA_SESSION,
+	RTA_PREFOIF,
 };
 
 #define RTA_MAX RTA_SESSION
Index: kernel-source-2.5/net//ipv4/route.c
===================================================================
RCS file: /home/gondolin/herbert/src/CVS/debian/kernel-source-2.5/net/ipv4/route.c,v
retrieving revision 1.3
diff -u -r1.3 route.c
--- kernel-source-2.5/net//ipv4/route.c	24 Nov 2003 09:52:04 -0000	1.3
+++ kernel-source-2.5/net//ipv4/route.c	2 Dec 2003 10:57:12 -0000
@@ -2347,6 +2347,8 @@
 #endif
 			RTA_PUT(skb, RTA_IIF, sizeof(int), &rt->fl.iif);
 	}
+	if (rt->fl.oif)
+		RTA_PUT(skb, RTA_PREFOIF, sizeof(int), &rt->fl.oif);
 
 	nlh->nlmsg_len = skb->tail - b;
 	return skb->len;