Implement on-link route adding for iproute2

This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
Currently, when compiling with --enable-iproute2 , OpenVPN does not
create a correct route when the user is connected to the Internet
without a gateway (e.g. via ppp). This patch implements the
corresponding FIXME.

Signed-off-by: Philipp Hagemeister <phihag@phihag.de>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <54259015.2030005@phihag.de>
URL: http://article.gmane.org/gmane.network.openvpn.devel/9056
Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit baa195b9884e276c4fd3dc0c9e8a84b89ea71cfb)

diff --git a/src/openvpn/route.c b/src/openvpn/route.c
index 532edc6ad672753326a92be3e86e7f8e6a5494b9..cc85e4d85232d42c311d4e8fb3e995ad68aef177 100644 (file)
--- a/src/openvpn/route.c
+++ b/src/openvpn/route.c
@@ -1318,15 +1318,18 @@ add_route (struct route_ipv4 *r,
 
 #if defined(TARGET_LINUX)
 #ifdef ENABLE_IPROUTE
-  /* FIXME -- add on-link support for ENABLE_IPROUTE */
-  argv_printf (&argv, "%s route add %s/%d via %s",
+  argv_printf (&argv, "%s route add %s/%d",
              iproute_path,
              network,
-             count_netmask_bits(netmask),
-             gateway);
+             count_netmask_bits(netmask));
+
   if (r->flags & RT_METRIC_DEFINED)
     argv_printf_cat (&argv, "metric %d", r->metric);
 
+  if (is_on_link (is_local_route, flags, rgi))
+    argv_printf_cat (&argv, "dev %s", rgi->iface);
+  else
+    argv_printf_cat (&argv, "via %s", gateway);
 #else
   argv_printf (&argv, "%s add -net %s netmask %s",
               ROUTE_PATH,