cisco set the tos on their keepalive packets to ip precedence

internet control, so we can too.

diff --git a/sys/net/if_gre.c b/sys/net/if_gre.c
index 57102ae..7d8d88b 100644 (file)
--- a/sys/net/if_gre.c
+++ b/sys/net/if_gre.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: if_gre.c,v 1.106 2018/02/20 03:53:54 dlg Exp $ */
+/*      $OpenBSD: if_gre.c,v 1.107 2018/02/20 04:03:15 dlg Exp $ */
 /*     $NetBSD: if_gre.c,v 1.9 1999/10/25 19:18:11 drochner Exp $ */
 
 /*
@@ -1426,7 +1426,7 @@ gre_keepalive_send(void *arg)
        t.t_key = sc->sc_tunnel.t_key;
        t.t_key_mask = sc->sc_tunnel.t_key_mask;
 
-       m = gre_encap(&t, m, htons(0), ttl, 0);
+       m = gre_encap(&t, m, htons(0), ttl, IPTOS_PREC_INTERNETCONTROL);
        if (m == NULL)
                return;
 
@@ -1454,7 +1454,8 @@ gre_keepalive_send(void *arg)
        /*
         * put it in the tunnel
         */
-       m = gre_encap(&sc->sc_tunnel, m, proto, ttl, 0);
+       m = gre_encap(&sc->sc_tunnel, m, proto, ttl,
+           IPTOS_PREC_INTERNETCONTROL);
        if (m == NULL)
                return;