From 0fff9a8d58127295986c8a0343c38a40a0f82e04 Mon Sep 17 00:00:00 2001
From: ChristopheI <christophe.irles@al-enterprise.com>
Date: Thu, 10 Aug 2023 11:03:50 +0200
Subject: [PATCH] Fix Data Channel Open Message: Protocol was missing and
 ChannelType was hardcoded. Not sure that all ChannelType are really supported

---
 src/net/WebRTC/RTCDataChannel.cs | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/net/WebRTC/RTCDataChannel.cs b/src/net/WebRTC/RTCDataChannel.cs
index 04b1ec27e..e9e253287 100644
--- a/src/net/WebRTC/RTCDataChannel.cs
+++ b/src/net/WebRTC/RTCDataChannel.cs
@@ -202,11 +202,26 @@ public void send(byte[] data)
         /// </summary>
         internal void SendDcepOpen()
         {
+            byte type = (byte)DataChannelTypes.DATA_CHANNEL_RELIABLE;
+            if (!ordered)
+            {
+                type += (byte)DataChannelTypes.DATA_CHANNEL_RELIABLE_UNORDERED;
+            }
+            if (maxPacketLifeTime > 0)
+            {
+                type += (byte)DataChannelTypes.DATA_CHANNEL_PARTIAL_RELIABLE_TIMED;
+            }
+            else if(maxRetransmits > 0)
+            {
+                type += (byte)DataChannelTypes.DATA_CHANNEL_PARTIAL_RELIABLE_REXMIT;
+            }
+
             var dcepOpen = new DataChannelOpenMessage()
             {
                 MessageType = (byte)DataChannelMessageTypes.OPEN,
-                ChannelType = (byte)DataChannelTypes.DATA_CHANNEL_RELIABLE_UNORDERED,
-                Label = label
+                ChannelType = (byte)type,
+                Label = label,
+                Protocol = protocol,
             };
 
             lock (this)