attach a tracing ID to the session context

client.go

@@ -37,8 +37,9 @@ type client struct {
 
 	session quicSession
 
-	tracer logging.ConnectionTracer
-	logger utils.Logger
+	tracer    logging.ConnectionTracer
+	tracingID uint64
+	logger    utils.Logger
 }
 
 var (
@@ -208,6 +209,7 @@ func dialContext(
 	if c.tracer != nil {
 		c.tracer.StartedConnection(c.conn.LocalAddr(), c.conn.RemoteAddr(), c.srcConnID, c.destConnID)
 	}
+	c.tracingID = nextSessionTracingID()
 	if err := c.dial(ctx); err != nil {
 		return nil, err
 	}
@@ -285,6 +287,7 @@ func (c *client) dial(ctx context.Context) error {
 		c.use0RTT,
 		c.hasNegotiatedVersion,
 		c.tracer,
+		c.tracingID,
 		c.logger,
 		c.version,
 	)