1 files changed, 27 insertions, 0 deletions
diff --git a/core/connection.go b/core/connection.go
index f3ff964..ee5a06b 100644
--- a/core/connection.go
+++ b/core/connection.go
@@ -123,6 +123,8 @@ type Connection struct {
 
 	msgControlPing      api.Message
 	msgControlPingReply api.Message
+
+	apiTrace *trace // API tracer (disabled by default)
 }
 
 func newConnection(binapi adapter.VppAPI, attempts int, interval time.Duration) *Connection {
@@ -145,6 +147,10 @@ func newConnection(binapi adapter.VppAPI, attempts int, interval time.Duration)
 		subscriptions:       make(map[uint16][]*subscriptionCtx),
 		msgControlPing:      msgControlPing,
 		msgControlPingReply: msgControlPingReply,
+		apiTrace: &trace{
+			list: make([]*api.Record, 0),
+			mux:  &sync.Mutex{},
+		},
 	}
 	binapi.SetMsgCallback(c.msgCallback)
 	return c
@@ -480,3 +486,24 @@ func (c *Connection) sendConnEvent(event ConnectionEvent) {
 		log.Warn("Connection state channel is full, discarding value.")
 	}
 }
+
+// Trace gives access to the API trace interface
+func (c *Connection) Trace() api.Trace {
+	return c.apiTrace
+}
+
+// trace records api message
+func (c *Connection) trace(msg api.Message, chId uint16, t time.Time, isReceived bool) {
+	if atomic.LoadInt32(&c.apiTrace.isEnabled) == 0 {
+		return
+	}
+	entry := &api.Record{
+		Message:    msg,
+		Timestamp:  t,
+		IsReceived: isReceived,
+		ChannelID:  chId,
+	}
+	c.apiTrace.mux.Lock()
+	c.apiTrace.list = append(c.apiTrace.list, entry)
+	c.apiTrace.mux.Unlock()
+}