snapshot of https://github.com/jitsi/jitsi-videobridge.git @ fcbf741c646bc237d2ed85a1e86910532532b831 (2026-09-15)

doc/datachannel-communication.md

@@ -0,0 +1,36 @@
+# Messages by COLIBRI class:
+
+## EndpointMessage:
+
+
+This type of messages could be used by the clients for sending JSON objects to the other clients in the conference. A client can send a message to specific endpoint or a broadcast message.
+
+
+
+* The messages processed by Jitsi Videobridge has the following format:
+
+```
+{
+    colibriClass: "EndpointMessage",  
+    to: `<ENDPOINT-ID>`,   
+    msgPayload: `<PAYLOAD>`  
+}
+```
+
+`<PAYLOAD>` is valid JSON string.  
+`<ENDPOINT-ID>` is endpoint id of existing participant or `""` for broadcast message.
+
+* The messages sent by Jitsi Videobridge has the following format:
+
+
+```
+{
+    colibriClass: "EndpointMessage",
+    to: `<ENDPOINT-ID>`,
+    from: `<ENDPOINT-ID>`,
+    msgPayload: <PAYLOAD>
+}
+```
+
+
+The only modification made by Jitsi Videobridge before the message is forwarded is adding `from` property to it. The value of this property is the endpoint id of the sender of the message.