From 5b2a80f16691e0313d4f7244e6cf4ac97c05527e Mon Sep 17 00:00:00 2001
From: andre <andre@FreeBSD.org>
Date: Fri, 23 Apr 2004 16:57:43 +0000
Subject: [PATCH] Add the comment of the previous commit to the source file
 directly.

Requested by:	ru
---
 sys/net/if_gre.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sys/net/if_gre.c b/sys/net/if_gre.c
index 89c4b636bc3f..2cdf92ba03bb 100644
--- a/sys/net/if_gre.c
+++ b/sys/net/if_gre.c
@@ -385,7 +385,11 @@ gre_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
 
 	ifp->if_opackets++;
 	ifp->if_obytes += m->m_pkthdr.len;
-	/* send it off */
+	/*
+	 * Send it off and with IP_FORWARD flag to prevent it from
+	 * overwriting the ip_id again.  ip_id is already set to the
+	 * ip_id of the encapsulated packet.
+	 */
 	error = ip_output(m, NULL, &sc->route, IP_FORWARDING,
 	    (struct ip_moptions *)NULL, (struct inpcb *)NULL);
   end: