netifd: Reload proto on topology change

Introduce a new device event "topology change" that gets signaled
by bridges on adding/removing members.

On "topology changes" the proto handlers are requested to "renew"
which is most useful for DHCP.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/device.h b/device.h
index dd57927..e71027e 100644
--- a/device.h
+++ b/device.h
@@ -78,6 +78,9 @@ enum device_event {
 	DEV_EVENT_LINK_UP,
 	DEV_EVENT_LINK_DOWN,
 
+	/* Topology changed (i.e. bridge member added) */
+	DEV_EVENT_TOPO_CHANGE,
+
 	__DEV_EVENT_MAX
 };