1 files changed, 44 insertions, 0 deletions
diff --git a/src/webrtc/opcodes/SelectProtocol.ts b/src/webrtc/opcodes/SelectProtocol.ts
new file mode 100644
index 00000000..913ddfff
--- /dev/null
+++ b/src/webrtc/opcodes/SelectProtocol.ts
@@ -0,0 +1,44 @@
+import { Payload, Send, WebSocket } from "@fosscord/gateway";
+import { SelectProtocolSchema, validateSchema } from "@fosscord/util";
+import { endpoint, PublicIP, VoiceOPCodes } from "@fosscord/webrtc";
+import SemanticSDP from "semantic-sdp";
+
+export async function onSelectProtocol(this: WebSocket, payload: Payload) {
+	const data = validateSchema("SelectProtocolSchema", payload.d) as SelectProtocolSchema;
+
+	const offer = SemanticSDP.SDPInfo.parse("m=audio\n" + data.sdp!);
+	this.client.sdp!.setICE(offer.getICE());
+	this.client.sdp!.setDTLS(offer.getDTLS());
+
+	const transport = endpoint.createTransport(this.client.sdp!);
+	this.client.transport = transport;
+	transport.setRemoteProperties(this.client.sdp!);
+	transport.setLocalProperties(this.client.sdp!);
+
+	const dtls = transport.getLocalDTLSInfo();
+	const ice = transport.getLocalICEInfo();
+	const port = endpoint.getLocalPort();
+	const fingerprint = dtls.getHash() + " " + dtls.getFingerprint();
+	const candidates = transport.getLocalCandidates();
+	const candidate = candidates[0];
+
+	const answer = `m=audio ${port} ICE/SDP
+a=fingerprint:${fingerprint}
+c=IN IP4 ${PublicIP}
+a=rtcp:${port}
+a=ice-ufrag:${ice.getUfrag()}
+a=ice-pwd:${ice.getPwd()}
+a=fingerprint:${fingerprint}
+a=candidate:1 1 ${candidate.getTransport()} ${candidate.getFoundation()} ${candidate.getAddress()} ${candidate.getPort()} typ host
+`;
+
+	await Send(this, {
+		op: VoiceOPCodes.SELECT_PROTOCOL_ACK,
+		d: {
+			video_codec: "H264",
+			sdp: answer,
+			media_session_id: this.session_id,
+			audio_codec: "opus"
+		}
+	});
+}