From 2aa11f677fcf14359b7c10f52007f68b121f022a Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Wed, 18 Mar 1998 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1998-03-18

---
 ip/ipifc.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/ip/ipifc.c b/ip/ipifc.c
index db35fd8c4a8c4fa1a3994e132d910a6b3853be22..4fed051e7b3abc1c4332d6ee06e985bd2d5b8a0e 100644
--- a/ip/ipifc.c
+++ b/ip/ipifc.c
@@ -369,12 +369,23 @@ ipifcadd(Ipifc *ifc, char **argv, int argc)
 		bcast[i] = (ip[i] & mask[i]) | ~mask[i];
 	addselfcache(f, ifc, lifc, bcast, Rbcast);
 
+	/* add old subnet directed broadcast addresses to the self cache */
+	for(i = 0; i < IPaddrlen; i++)
+		bcast[i] = (ip[i] & mask[i]) & mask[i];
+	addselfcache(f, ifc, lifc, bcast, Rbcast);
+
 	/* add network directed broadcast addresses to the self cache */
 	memmove(mask, defmask(ip), IPaddrlen);
 	for(i = 0; i < IPaddrlen; i++)
 		bcast[i] = (ip[i] & mask[i]) | ~mask[i];
 	addselfcache(f, ifc, lifc, bcast, Rbcast);
 
+	/* add old network directed broadcast addresses to the self cache */
+	memmove(mask, defmask(ip), IPaddrlen);
+	for(i = 0; i < IPaddrlen; i++)
+		bcast[i] = (ip[i] & mask[i]) & mask[i];
+	addselfcache(f, ifc, lifc, bcast, Rbcast);
+
 	addselfcache(f, ifc, lifc, IPv4bcast, Rbcast);
 
 out: