Add Advertising / Reading ICE trickle support

offeransweroptions.go

@@ -9,6 +9,10 @@ type OfferAnswerOptions struct {
 	// VoiceActivityDetection allows the application to provide information
 	// about whether it wishes voice detection feature to be enabled or disabled.
 	VoiceActivityDetection bool
+	// ICETricklingSupported indicates whether the ICE agent should use trickle ICE
+	// If set, the "a=ice-options:trickle" attribute is added to the generated SDP payload.
+	// (See https://datatracker.ietf.org/doc/html/rfc9725#section-4.3.3)
+	ICETricklingSupported bool
 }
 
 // AnswerOptions structure describes the options used to control the answer

peerconnection.go

@@ -718,6 +718,10 @@
 			return SessionDescription{}, err
 		}
 
+		if options.ICETricklingSupported {
+			descr.WithICETrickleAdvertised()
+		}
+
 		offer = SessionDescription{
 			Type:   SDPTypeOffer,
 			SDP:    string(sdpBytes),
@@ -836,7 +840,7 @@
 // CreateAnswer starts the PeerConnection and generates the localDescription.
 //
 //nolint:cyclop
-func (pc *PeerConnection) CreateAnswer(*AnswerOptions) (SessionDescription, error) {
+func (pc *PeerConnection) CreateAnswer(options *AnswerOptions) (SessionDescription, error) {
 	useIdentity := pc.idpLoginURL != nil
 	remoteDesc := pc.RemoteDescription()
 	switch {
@@ -876,6 +880,10 @@
 		return SessionDescription{}, err
 	}
 
+	if options.ICETricklingSupported {
+		descr.WithICETrickleAdvertised()
+	}
+
 	desc := SessionDescription{
 		Type:   SDPTypeAnswer,
 		SDP:    string(sdpBytes),