From aca9f66546b7018beb53a6357a4f2e381e2590a5 Mon Sep 17 00:00:00 2001
From: Stig Thormodsrud <stig@vyatta.com>
Date: Tue, 3 Jun 2008 12:34:08 -0700
Subject: Fix 920: System allows configuration of invalid IP Address for subnet

---
 scripts/vyatta-interfaces.pl | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/scripts/vyatta-interfaces.pl b/scripts/vyatta-interfaces.pl
index dd71d7a..ad059c5 100755
--- a/scripts/vyatta-interfaces.pl
+++ b/scripts/vyatta-interfaces.pl
@@ -471,6 +471,18 @@ sub is_valid_addr {
 	exit 1;
     }
 
+    my $ip = NetAddr::IP->new($addr_net);
+    my $network = $ip->network();
+    my $bcast   = $ip->broadcast();
+    if ($ip->addr() eq $network->addr()) {
+       print "Can not assign network address as the IP address\n";
+       exit 1;
+    }
+    if ($ip->addr() eq $bcast->addr()) {
+       print "Can not assign broadcast address as the IP address\n";
+       exit 1;
+    }
+
     if (is_dhcp_enabled($intf)) {
 	print "Error: remove dhcp before adding static addresses for $intf\n";
 	exit 1;
-- 
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