diff -r -U2 iproute-20070313-dsc/include/linux/rtnetlink.h iproute-20070313-dsc-dsad/include/linux/rtnetlink.h
--- iproute-20070313-dsc/include/linux/rtnetlink.h	2007-03-13 17:50:56.000000000 -0400
+++ iproute-20070313-dsc-dsad/include/linux/rtnetlink.h	2007-12-06 19:56:50.000000000 -0500
@@ -295,4 +295,5 @@
 #define RTNH_F_PERVASIVE	2	/* Do recursive gateway lookup	*/
 #define RTNH_F_ONLINK		4	/* Gateway is forced on link	*/
+#define RTNH_F_DSAD		8	/* Dynamic PBR (choose nh by src) */
 
 /* Macros to handle hexthops */
Binary files iproute-20070313-dsc/ip/ip and iproute-20070313-dsc-dsad/ip/ip differ
diff -r -U2 iproute-20070313-dsc/ip/iproute.c iproute-20070313-dsc-dsad/ip/iproute.c
--- iproute-20070313-dsc/ip/iproute.c	2007-12-07 16:39:48.000000000 -0500
+++ iproute-20070313-dsc-dsad/ip/iproute.c	2007-12-06 19:57:01.000000000 -0500
@@ -70,5 +70,5 @@
 	fprintf(stderr, "             [ mpath MP_ALGO ]\n");
 	fprintf(stderr, "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n");
-	fprintf(stderr, "NH := [ via ADDRESS ] [ dev STRING ] [ weight NUMBER ] NHFLAGS\n");
+	fprintf(stderr, "NH := [ via ADDRESS ] [ dev STRING ] [ weight NUMBER | byrealm REALM ] NHFLAGS\n");
 	fprintf(stderr, "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ]\n");
 	fprintf(stderr, "           [ rtt NUMBER ] [ rttvar NUMBER ]\n");
@@ -583,5 +583,9 @@
 			} else {
 				fprintf(fp, " dev %s", ll_index_to_name(nh->rtnh_ifindex));
-				fprintf(fp, " weight %d", nh->rtnh_hops+1);
+				if (nh->rtnh_flags & RTNH_F_DSAD) {
+					fprintf(fp, " byrealm %x", nh->rtnh_hops);
+				} else {
+					fprintf(fp, " weight %d", nh->rtnh_hops+1);
+				}
 			}
 			if (nh->rtnh_flags & RTNH_F_DEAD)
@@ -623,4 +627,11 @@
 				invarg("\"weight\" is invalid\n", *argv);
 			rtnh->rtnh_hops = w - 1;
+		} else if (strcmp(*argv, "byrealm") == 0) {
+			unsigned r;
+			NEXT_ARG();
+			if (get_unsigned(&r, *argv, 0) || r == 0 || r > 0x7fff)
+				invarg("\"byrealm\" is invalid\n", *argv);
+			rtnh->rtnh_hops = r;
+			rtnh->rtnh_flags |= RTNH_F_DSAD;
 		} else if (strcmp(*argv, "onlink") == 0) {
 			rtnh->rtnh_flags |= RTNH_F_ONLINK;