update modules

node_modules/ws/lib/receiver.js

@@ -30,14 +30,17 @@ class Receiver extends Writable {
    *
    * @param {String} binaryType The type for binary data
    * @param {Object} extensions An object containing the negotiated extensions
+   * @param {Boolean} isServer Specifies whether to operate in client or server
+   *     mode
    * @param {Number} maxPayload The maximum allowed message length
    */
-  constructor(binaryType, extensions, maxPayload) {
+  constructor(binaryType, extensions, isServer, maxPayload) {
     super();
 
     this._binaryType = binaryType || BINARY_TYPES[0];
     this[kWebSocket] = undefined;
     this._extensions = extensions || {};
+    this._isServer = !!isServer;
     this._maxPayload = maxPayload | 0;
 
     this._bufferedBytes = 0;
@@ -65,6 +68,7 @@ class Receiver extends Writable {
    * @param {Buffer} chunk The chunk of data to write
    * @param {String} encoding The character encoding of `chunk`
    * @param {Function} cb Callback
+   * @private
    */
   _write(chunk, encoding, cb) {
     if (this._opcode === 0x08 && this._state == GET_INFO) return cb();
@@ -96,11 +100,12 @@ class Receiver extends Writable {
 
     do {
       const buf = this._buffers[0];
+      const offset = dst.length - n;
 
       if (n >= buf.length) {
-        this._buffers.shift().copy(dst, dst.length - n);
+        dst.set(this._buffers.shift(), offset);
       } else {
-        buf.copy(dst, dst.length - n, 0, n);
+        dst.set(new Uint8Array(buf.buffer, buf.byteOffset, n), offset);
         this._buffers[0] = buf.slice(n);
       }
 
@@ -117,7 +122,7 @@ class Receiver extends Writable {
    * @private
    */
   startLoop(cb) {
-    var err;
+    let err;
     this._loop = true;
 
     do {
@@ -224,6 +229,16 @@ class Receiver extends Writable {
     if (!this._fin && !this._fragmented) this._fragmented = this._opcode;
     this._masked = (buf[1] & 0x80) === 0x80;
 
+    if (this._isServer) {
+      if (!this._masked) {
+        this._loop = false;
+        return error(RangeError, 'MASK must be set', true, 1002);
+      }
+    } else if (this._masked) {
+      this._loop = false;
+      return error(RangeError, 'MASK must be clear', true, 1002);
+    }
+
     if (this._payloadLength === 126) this._state = GET_PAYLOAD_LENGTH_16;
     else if (this._payloadLength === 127) this._state = GET_PAYLOAD_LENGTH_64;
     else return this.haveLength();
@@ -320,7 +335,7 @@ class Receiver extends Writable {
    * @private
    */
   getData(cb) {
-    var data = EMPTY_BUFFER;
+    let data = EMPTY_BUFFER;
 
     if (this._payloadLength) {
       if (this._bufferedBytes < this._payloadLength) {
@@ -400,7 +415,7 @@ class Receiver extends Writable {
       this._fragments = [];
 
       if (this._opcode === 2) {
-        var data;
+        let data;
 
         if (this._binaryType === 'nodebuffer') {
           data = concat(fragments, messageLength);