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Signaling Message Types

Request Call

This message is sent from the client to request a WebRTC call.

Format

{ “type”: “REQUEST_CALL”, “offerVideo”: true|false }

Call Rejected

This message is sent from the server to indicate that a requested call was rejected.

Format

{ “type”: “CALL_REJECTED”, “reason_code”: <reject reason code>, “reason”: TBD }

Offer Call

This message is sent from the server to start a WebRTC session.

Format

{ “type”: “OFFER_CALL”, “offerVideo”: true|false, “sdp”: “<session description string>” }

Answer Call

This message is sent from the client to confirm the WebRTC session started by the server.

Format

{ “type”: “ANSWER_CALL”, “sdp”: “<session description string>” }

ICE Candidate

This message is sent from the client or server with ICE candidate description.

Format

{ “type”: “ICE_CANDIDATE”, “sdpMid”: “<candidate id>”, “sdpMLineIndex”: “<candidate index>”, “candidate”: “<candidate description>” }

End Call

This message is sent from the client or server to end the current WebRTC session.

Format

{ “type”: “END_CALL” }

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