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-rw-r--r--src/router.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/router.c b/src/router.c
index 9907824..9711975 100644
--- 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,