manifest.json

{
  "name": "Chrome Packaged App",
  "description": "Chrome Packaged App Description...",
  "manifest_version": 2,
  "version": "0.0.1",
  "minimum_chrome_version": "23",
  "app": {
    "background": {
      "scripts": ["dist/bundle.js"]
    }
  },
  "permissions": ["webview"],
  "sockets": {
    "tcp": {
      "connect": "*"
    },
    "udp": {
      "send": "*",
      "bind": "*"
    },
    "tcpServer": {
      "listen": "*"
    }
  }
}