+ __set_interface_down(iface, true);
+}
+
+static void
+interface_proto_cb(struct interface_proto_state *state, enum interface_proto_event ev)
+{
+ struct interface *iface = state->iface;
+
+ switch (ev) {
+ case IFPEV_UP:
+ if (iface->state != IFS_SETUP)
+ return;
+
+ iface->state = IFS_UP;
+ interface_event(iface, IFEV_UP);
+ break;
+ case IFPEV_DOWN:
+ if (iface->state == IFS_DOWN)
+ return;
+
+ mark_interface_down(iface);
+ break;
+ }
+}
+
+void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state)
+{
+ if (iface->proto) {
+ interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, true);
+ iface->proto->free(iface->proto);
+ iface->proto = NULL;
+ }
+ iface->state = IFS_DOWN;
+ iface->proto = state;
+ if (!state)
+ return;
+
+ state->proto_event = interface_proto_cb;
+ state->iface = iface;