From e9fdd5d2fd20008693075b9e4464e5945b0cdd10 Mon Sep 17 00:00:00 2001
From: David Zhao <david@davidzhao.com>
Date: Sat, 19 Dec 2020 16:18:58 -0800
Subject: [PATCH] ignore placeholder data channel

---
 pkg/rtc/participant.go | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/pkg/rtc/participant.go b/pkg/rtc/participant.go
index 8234645cf..f1af7cf60 100644
--- a/pkg/rtc/participant.go
+++ b/pkg/rtc/participant.go
@@ -19,7 +19,8 @@ import (
 )
 
 const (
-	sdBatchSize = 20
+	placeholderDataChannel = "_private"
+	sdBatchSize            = 20
 )
 
 type Participant struct {
@@ -366,7 +367,10 @@ func (p *Participant) onMediaTrack(track *webrtc.TrackRemote, rtpReceiver *webrt
 }
 
 func (p *Participant) onDataChannel(dc *webrtc.DataChannel) {
-	logger.GetLogger().Debugw("dataChannel added", "participantId", p.ID(), "id", dc.ID())
+	if dc.Label() == placeholderDataChannel {
+		return
+	}
+	logger.GetLogger().Debugw("dataChannel added", "participantId", p.ID(), "label", dc.Label())
 
 	dt := NewDataTrack(p.id, dc)
 	p.lock.Lock()