From 0c11afbceb7fb7ae0dae7ba1fd3767b40417126c Mon Sep 17 00:00:00 2001
From: Ted Lemon <source@isc.org>
Date: Sat, 6 Dec 1997 04:04:50 +0000
Subject: [PATCH] NAK if a client requests an address that we own but can't
 give to it.

---
 server/dhcp.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/server/dhcp.c b/server/dhcp.c
index 7a6a1d1f8..c00a3afdd 100644
--- a/server/dhcp.c
+++ b/server/dhcp.c
@@ -42,7 +42,7 @@
 
 #ifndef lint
 static char copyright[] =
-"$Id: dhcp.c,v 1.56 1997/12/02 09:28:08 mellon Exp $ Copyright (c) 1995, 1996 The Internet Software Consortium.  All rights reserved.\n";
+"$Id: dhcp.c,v 1.57 1997/12/06 04:04:50 mellon Exp $ Copyright (c) 1995, 1996 The Internet Software Consortium.  All rights reserved.\n";
 #endif /* not lint */
 
 #include "dhcpd.h"
@@ -274,6 +274,13 @@ void dhcprequest (packet)
 		return;
 	}
 
+	/* If the address the client asked for is ours, but it wasn't
+           available for the client, NAK it. */
+	if (!lease && ours) {
+		nak_lease (packet, &cip);
+		return;
+	}
+
 	/* If we own the lease that the client is asking for,
 	   and it's already been assigned to the client, ack it. */
 	if (lease &&
-- 
2.47.2