在打包的Chrome应用中发送多播UDP

Question

我正在尝试将一个简单的udp组播数据包发送到chrome app中的255.255.255.255。我能够获得常规的udp数据包发送，但是一旦我尝试广播地址，我就会在运行sockets.udp.send时获得'未经检查的runtime.lastError：net :: ERR_ACCESS_DENIED'

我的清单看起来像

{
  "manifest_version": 2,
  "name": "UDP Multicast",
  "description": "udp",
  "version": "0.0.1",
  "app": {
    "background": {
      "scripts": ["background.js"]
    }
  },
  "icons": { "16": "icon.png" },
  "sockets": {
    "udp": {
      "send": "*",
      "bind": "*"
    }
  },
  "permissions": [
    {"socket": ["udp-bind", "udp-send-to"]}
  ]
}

和我的background.js

chrome.app.runtime.onLaunched.addListener(function() {
  // chrome.app.window.create('window.html', {
  //   'bounds': {
  //     'width': 400,
  //     'height': 500
  //   }
  // });

  chrome.sockets.udp.create({}, function(socketInfo) {
    var socketId = socketInfo.socketId;
    var arrayBuffer = new ArrayBuffer(6);
    var buffer = new Uint16Array(arrayBuffer);
    buffer[0] = 0x2e
    buffer[1] = 0x2c
    buffer[2] = 0x3a
    buffer[3] = 0x01
    buffer[4] = 0x00
    buffer[5] = 0x00
    chrome.sockets.udp.bind(socketId, "0.0.0.0", 0, function(result) {
      chrome.sockets.udp.send(socketId, buffer.buffer, '255.255.255.255', 4201, function(sendInfo) {
        console.log("sent ", sendInfo.bytesSent);
      });
    });
  });
});