From: Antonio Quartulli <anto...@openvpn.net>
Signed-off-by: Antonio Quartulli <anto...@openvpn.net>
---
src/openvpn/forward.c | 4 +++-
src/openvpn/tun.c | 24 +++++++++++++++++-------
2 files changed, 20 insertions(+), 8 deletions(-)
diff --git a/src/openvpn/forward.c b/src/openvpn/forward.c
index 7d9a338d..51e43c28 100644
--- a/src/openvpn/forward.c
+++ b/src/openvpn/forward.c
@@ -292,7 +292,9 @@ check_add_routes_action(struct context *c, const bool
errors)
void
check_add_routes_dowork(struct context *c)
{
- if (test_routes(c->c1.route_list, c->c1.tuntap))
+ /* skip route check if no IPv4 was configured */
+ if (!c->c1.tuntap->did_ifconfig_setup
+ || test_routes(c->c1.route_list, c->c1.tuntap))
{
check_add_routes_action(c, false);
}
diff --git a/src/openvpn/tun.c b/src/openvpn/tun.c
index 8509d489..d183aea7 100644
--- a/src/openvpn/tun.c
+++ b/src/openvpn/tun.c
@@ -5718,7 +5718,10 @@ open_tun(const char *dev, const char *dev_type, const
char *dev_node, struct tun
msg(M_FATAL, "ERROR: --dev tun also requires --ifconfig");
}
- if (tt->topology == TOP_SUBNET)
+ /* send 0/0/0 to the TAP driver even if we have no IPv4 configured to
+ * ensure it is somehow initialized.
+ */
+ if (!tt->did_ifconfig_setup || tt->topology == TOP_SUBNET)
{
in_addr_t ep[3];
BOOL status;
@@ -5731,12 +5734,19 @@ open_tun(const char *dev, const char *dev_type, const
char *dev_node, struct tun
ep, sizeof(ep),
ep, sizeof(ep), &len, NULL);
- msg(status ? M_INFO : M_FATAL, "Set TAP-Windows TUN subnet mode
network/local/netmask = %s/%s/%s [%s]",
- print_in_addr_t(ep[1], IA_NET_ORDER, &gc),
- print_in_addr_t(ep[0], IA_NET_ORDER, &gc),
- print_in_addr_t(ep[2], IA_NET_ORDER, &gc),
- status ? "SUCCEEDED" : "FAILED");
-
+ if (tt->did_ifconfig_setup)
+ {
+ msg(status ? M_INFO : M_FATAL, "Set TAP-Windows TUN subnet
mode network/local/netmask = %s/%s/%s [%s]",
+ print_in_addr_t(ep[1], IA_NET_ORDER, &gc),
+ print_in_addr_t(ep[0], IA_NET_ORDER, &gc),
+ print_in_addr_t(ep[2], IA_NET_ORDER, &gc),
+ status ? "SUCCEEDED" : "FAILED");
+ }
+ else
+ {
+ msg(status ? M_INFO : M_FATAL, "Set TAP-Windows TUN with fake
IPv4 [%s]",
+ status ? "SUCCEEDED" : "FAILED");
+ }
}
else
{
--
2.17.1
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