1 files changed, 25 insertions, 10 deletions

diff --git a/proto.c b/proto.c
index 287eae5..b16600c 100644
--- a/proto.c
+++ b/proto.c
@@ -16,7 +16,30 @@ static int
 default_proto_handler(struct interface_proto_state *proto,
 		      enum interface_proto_cmd cmd, bool force)
 {
+	return 0;
+}
+
+struct interface_proto_state *get_default_proto(void)
+{
+	struct interface_proto_state *proto;
+
+	proto = calloc(1, sizeof(*proto));
+	proto->handler = default_proto_handler;
+	proto->free = default_proto_free;
+	proto->flags = PROTO_FLAG_IMMEDIATE;
+
+	return proto;
+}
+
+int interface_proto_event(struct interface_proto_state *proto,
+			  enum interface_proto_cmd cmd, bool force)
+{
 	enum interface_event ev;
+	int ret;
+
+	ret = proto->handler(proto, cmd, force);
+	if (ret || !(proto->flags & PROTO_FLAG_IMMEDIATE))
+		goto out;
 
 	switch(cmd) {
 	case PROTO_CMD_SETUP:
@@ -29,15 +52,7 @@ default_proto_handler(struct interface_proto_state *proto,
 		return -EINVAL;
 	}
 	proto->proto_event(proto, ev);
-	return 0;
-}
 
-struct interface_proto_state *get_default_proto(void)
-{
-	struct interface_proto_state *proto;
-
-	proto = calloc(1, sizeof(*proto));
-	proto->handler = default_proto_handler;
-	proto->free = default_proto_free;
-	return proto;
+out:
+	return ret;
 }