68 lines
2.4 KiB
TypeScript
68 lines
2.4 KiB
TypeScript
/*
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Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
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Copyright (C) 2023 Spacebar and Spacebar Contributors
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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import { Payload, Send, WebSocket } from "@spacebar/gateway";
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import { SelectProtocolSchema, validateSchema } from "@spacebar/util";
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import { PublicIP, VoiceOPCodes, endpoint } from "@spacebar/webrtc";
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import SemanticSDP, { MediaInfo, SDPInfo } from "semantic-sdp";
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export async function onSelectProtocol(this: WebSocket, payload: Payload) {
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if (!this.client) return;
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const data = validateSchema(
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"SelectProtocolSchema",
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payload.d,
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) as SelectProtocolSchema;
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const offer = SemanticSDP.SDPInfo.parse("m=audio\n" + data.sdp!);
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this.client.sdp!.setICE(offer.getICE());
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this.client.sdp!.setDTLS(offer.getDTLS());
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const transport = endpoint.createTransport(this.client.sdp!);
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this.client.transport = transport;
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transport.setRemoteProperties(this.client.sdp!);
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transport.setLocalProperties(this.client.sdp!);
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const dtls = transport.getLocalDTLSInfo();
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const ice = transport.getLocalICEInfo();
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const port = endpoint.getLocalPort();
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const fingerprint = dtls.getHash() + " " + dtls.getFingerprint();
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const candidates = transport.getLocalCandidates();
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const candidate = candidates[0];
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const answer =
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`m=audio ${port} ICE/SDP` +
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`a=fingerprint:${fingerprint}` +
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`c=IN IP4 ${PublicIP}` +
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`a=rtcp:${port}` +
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`a=ice-ufrag:${ice.getUfrag()}` +
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`a=ice-pwd:${ice.getPwd()}` +
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`a=fingerprint:${fingerprint}` +
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`a=candidate:1 1 ${candidate.getTransport()} ${candidate.getFoundation()} ${candidate.getAddress()} ${candidate.getPort()} typ host`;
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await Send(this, {
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op: VoiceOPCodes.SESSION_DESCRIPTION,
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d: {
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video_codec: "H264",
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sdp: answer,
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media_session_id: this.session_id,
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audio_codec: "opus",
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},
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});
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}
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