From aa648cf84b3a324c6abe21bb0ff06bbb77c987c4 Mon Sep 17 00:00:00 2001
From: Julian Elischer <julian@FreeBSD.org>
Date: Tue, 13 Aug 1996 22:20:20 +0000
Subject: [PATCH] Submitted by: Archie@whistle.com if making a interface route,
 and it's a P2P link, then also automatically lable it as an llinfo entry so
 that gated and friends don't clobber it..

---
 sbin/route/keywords | 1 +
 sbin/route/route.8  | 7 +++++--
 sbin/route/route.c  | 8 +++++++-
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/sbin/route/keywords b/sbin/route/keywords
index b031a9eb66c9..07a0ddcbd095 100644
--- a/sbin/route/keywords
+++ b/sbin/route/keywords
@@ -21,6 +21,7 @@ ifp
 inet
 iso
 link
+llinfo
 lock
 lockrest
 mask
diff --git a/sbin/route/route.8 b/sbin/route/route.8
index be13a700835b..3a9ccc0c45f0 100644
--- a/sbin/route/route.8
+++ b/sbin/route/route.8
@@ -177,8 +177,11 @@ no intermediary system to act as a gateway, the
 modifier should be specified;
 the gateway given is the address of this host on the common network,
 indicating the interface to be used for transmission.
-If the interface point to point, the name of the interface
-itself may be given instead.
+Alternately, if the interface is point to point the name of the interface
+itself may be given, in which case the route remains valid even
+if the local or remote addresses change.  This forces the
+.Fl llinfo
+flag.
 .Pp
 The optional modifiers
 .Fl xns ,
diff --git a/sbin/route/route.c b/sbin/route/route.c
index a823569e813f..6acb279f63bf 100644
--- a/sbin/route/route.c
+++ b/sbin/route/route.c
@@ -43,7 +43,7 @@ static const char copyright[] =
 static char sccsid[] = "@(#)route.c	8.3 (Berkeley) 3/19/94";
 */
 static const char rcsid[] =
-	"$Id: route.c,v 1.11 1996/07/23 22:00:14 julian Exp $";
+	"$Id: route.c,v 1.12 1996/08/09 22:52:02 julian Exp $";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -111,6 +111,7 @@ int	s;
 int	forcehost, forcenet, doflush, nflag, af, qflag, tflag, keyword();
 int	iflag, verbose, aflen = sizeof (struct sockaddr_in);
 int	locking, lockrest, debugonly;
+int	extra_flags;
 struct	rt_metrics rt_metrics;
 u_long  rtm_inits;
 struct	in_addr inet_makeaddr();
@@ -596,6 +597,9 @@ newroute(argc, argv)
 			case K_NOSTATIC:
 				flags &= ~RTF_STATIC;
 				break;
+			case K_LLINFO:
+				flags |= RTF_LLINFO;
+				break;
 			case K_LOCK:
 				locking = 1;
 				break;
@@ -704,6 +708,7 @@ newroute(argc, argv)
 	if (forcenet)
 		ishost = 0;
 	flags |= RTF_UP;
+	flags |= extra_flags;
 	if (ishost)
 		flags |= RTF_HOST;
 	if (iflag == 0)
@@ -866,6 +871,7 @@ getaddr(which, s, hpp)
 			/* If we found it, then use it */
 			if (sdl) {
 				su->sdl = *sdl;
+				extra_flags |= RTF_LLINFO;
 				return(1);
 			}
 		}