config: Close interface when ifindex cannot be resolved

[project/odhcpd.git] / src / router.c

diff --git a/src/router.c b/src/router.c
index 9907824..9711975 100644 (file)
--- a/src/router.c
+++ b/src/router.c
@@ -99,6 +99,9 @@ int setup_router_interface(struct interface *iface, bool enable)
        uloop_timeout_cancel(&iface->timer_rs);
        iface->timer_rs.cb = NULL;
 
+       if (iface->ifindex <= 0)
+               return -1;
+
        setsockopt(router_event.uloop.fd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP,
                        &all_nodes, sizeof(all_nodes));
        setsockopt(router_event.uloop.fd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP,