ring: stream import options, direct sdp usage

common/src/listen-cluster.ts

@@ -1,4 +1,4 @@
-import net, { AddressInfo } from 'net';
+import net from 'net';
 import { once } from 'events';
 import dgram from 'dgram';
 
@@ -8,6 +8,16 @@ export async function listenZero(server: net.Server) {
     return (server.address() as net.AddressInfo).port;
 }
 
+export function closeQuiet(socket: dgram.Socket) {
+    if (!socket)
+        return;
+    try {
+        socket.close()
+    }
+    catch (e) {
+    }
+}
+
 export async function bindUdp(server: dgram.Socket, usePort: number) {
     server.bind(usePort);
     await once(server, 'listening');

common/src/sdp-utils.ts

@@ -1,3 +1,11 @@
+export function replacePorts(sdp: string, audioPort: number, videoPort: number) {
+    let outputSdp = sdp
+        .replace(/c=IN .*/, `c=IN IP4 127.0.0.1`)
+        .replace(/m=audio \d+/, `m=audio ${audioPort}`)
+        .replace(/m=video \d+/, `m=video ${videoPort}`);
+    return outputSdp;
+}
+
 export function addTrackControls(sdp: string) {
     let lines = sdp.split('\n').map(line => line.trim());
     lines = lines.filter(line => !line.includes('a=control:'));