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/proto.c b/proto.c
index 64be308..3a7b2a8 100644
--- a/proto.c
+++ b/proto.c
@@ -615,6 +615,9 @@ interface_proto_event(struct interface_proto_state *proto,
 	case PROTO_CMD_TEARDOWN:
 		ev = IFPEV_DOWN;
 		break;
+	case PROTO_CMD_RENEW:
+		ev = IFPEV_RENEW;
+		break;
 	default:
 		return -EINVAL;
 	}