From 59e7e5d169c8df950ac508ed5f987a0d7c38af82 Mon Sep 17 00:00:00 2001
From: Hajimu UMEMOTO <ume@FreeBSD.org>
Date: Thu, 26 Jul 2001 16:44:19 +0000
Subject: [PATCH] ifconfig if0 netmask xxx.xxx.xxx.0 didn't change the netmask.

PR:		bin/28833
MFC after:	3 days
---
 sbin/ifconfig/ifconfig.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sbin/ifconfig/ifconfig.c b/sbin/ifconfig/ifconfig.c
index 36f6595716bb..34f9d038c8bb 100644
--- a/sbin/ifconfig/ifconfig.c
+++ b/sbin/ifconfig/ifconfig.c
@@ -127,6 +127,7 @@ int	metric;
 int	mtu;
 int	setaddr;
 int	setipdst;
+int	setmask;
 int	doalias;
 int	clearaddr;
 int	newaddr = 1;
@@ -742,7 +743,7 @@ ifconfig(argc, argv, afp)
 			newaddr = 0;
 		}
 	}
-	if (newaddr && setaddr) {
+	if (newaddr && (setaddr || setmask)) {
 		strncpy(afp->af_addreq, name, sizeof ifr.ifr_name);
 		if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0)
 			Perror("ioctl (SIOCAIFADDR)");
@@ -861,6 +862,7 @@ setifnetmask(addr, dummy, s, afp)
 {
 	if (*afp->af_getaddr == NULL)
 		return;
+	setmask++;
 	(*afp->af_getaddr)(addr, MASK);
 }