update TLS servername for frame stream

mods/bambu/frames.js

@@ -10,7 +10,7 @@ const { bblCA } = require('./certificates');
 class FrameStream extends EventEmitter {
     #remoteSocket;
 
-    constructor(host, code) {
+    constructor(host, code, serial) {
         super();
 
         const abuf = new ArrayBuffer(80);
@@ -25,12 +25,11 @@ class FrameStream extends EventEmitter {
         new Uint8Array(abuf, 0x30, codeBytes.length).set(codeBytes);
 
         let frame;
-
         const remoteSocket = this.#remoteSocket = tls.connect({
             host,
             port: 6000,
             ca: bblCA,
-            checkServerIdentity: () => {} // TODO: use `servername: serial` instead
+            servername: serial
         }, () => {
             // send authentication to start jpeg frame stream
             remoteSocket.write(Buffer.from(abuf));

mods/bambu/init.js

@@ -64,7 +64,8 @@ module.exports = async (server) => {
                 this.#frames.end();
                 this.#frames = undefined;
             } else if (!this.#frames && bool) {
-                this.#frames = new FrameStream(this.#options.host, this.#options.password)
+                let { host, password } = this.#options;
+                this.#frames = new FrameStream(host, password, this.#serial)
                     .on("frame", jpg => {
                         wsend({ serial: this.#serial, frame: jpg.toString('base64') });
                     })