networkd: check that VTI/VTI6 tunnels have a local address

Otherwise we'd fail with an assertion:
Assertion 't->family == AF_INET' failed at ../src/network/netdev/tunnel.c:244, function netdev_vti_fill_message_create(). Aborting.

diff --git a/src/network/netdev/tunnel.c b/src/network/netdev/tunnel.c
index 2ce55a84b68e3c0eab8bc92fd6adc880e02b0cbd..c11ac0c539abc5863d4d8cc8b6c150601937d2cb 100644 (file)
--- a/src/network/netdev/tunnel.c
+++ b/src/network/netdev/tunnel.c
@@ -403,6 +403,20 @@ static int netdev_tunnel_verify(NetDev *netdev, const char *filename) {
                 return -EINVAL;
         }
 
+        if (netdev->kind == NETDEV_KIND_VTI &&
+            (t->family != AF_INET || in_addr_is_null(t->family, &t->local))) {
+                log_netdev_error(netdev,
+                                 "vti tunnel without a local IPv4 address configured in %s. Ignoring", filename);
+                return -EINVAL;
+        }
+
+        if (netdev->kind == NETDEV_KIND_VTI6 &&
+            (t->family != AF_INET6 || in_addr_is_null(t->family, &t->local))) {
+                log_netdev_error(netdev,
+                                 "vti6 tunnel without a local IPv4 address configured in %s. Ignoring", filename);
+                return -EINVAL;
+        }
+
         if (netdev->kind == NETDEV_KIND_IP6TNL &&
             t->ip6tnl_mode == _NETDEV_IP6_TNL_MODE_INVALID) {
                 log_netdev_error(netdev,