向连接到Wi-Fi网络的所有设备发送通知 [英] Send notification to all the devices connected to a Wi-Fi network

问题描述

有没有办法向连接到特定Wi-Fi网络的设备发送通知？

Is there any way to send a notification to the devices which are connected to a particular Wi-Fi network?

说，我有一个名为的Wi-Fi网络我的Wi-Fi，这是不安全的，任何人都可以连接。公共网络。

Say, I have a Wi-Fi network named "My Wi-Fi", which is not secured, that is any one can connect. A public network.

可能有N个用户连接到我的Wi-Fi。这些用户可以执行任何类型的交易，比如在线支付。

There may be N-number of users connected to "My Wi-Fi". These users can perform any kind of transaction, say online payment.

现在，如果我想关闭或关闭我的Wi-Fi路由器或接入点，这些交易可能会失败。

Now if I want to turn off or shut down "My Wi-Fi" router or access point, these transactions may fail.

因此，在关闭之前，我想向连接到我的Wi-Fi网络的所有用户发送文本通知。 （用户在他们的设备中没有任何类型的应用程序来推送通知。）

So before shutting down, I want to send a text notification to all the users connected to "My Wi-Fi" network. (User does not have any kind of app in their device, to push the notification.)

这可能吗？

推荐答案

没有标准方法向连接到Wi-Fi网络的所有设备发送（推送）消息。如果有办法，很容易找到规范并指出它是如何完成的。不幸的是，很难证明缺少某些东西。

There is no standard method of sending (pushing) a message to all devices attached to a Wi-Fi network. If there was a way, it would be easy to find the specification and point to how it is to be done. Unfortunately, it is difficult to prove the absence of something.

正如你清楚地意识到的那样，如果你控制的一个合适的页面是打开的，那么就可以这样做。浏览器或应用程序在其设备上运行。您可以开发一个框架，用户必须登录并保持页面打开或运行应用程序才能连接到您的Wi-Fi。

As you clearly realized, it would be possible to do so if an appropriate page which you control was open in a browser, or application running, on their device. You could develop a framework where users have to sign on and keep a page open, or application running, in order to connect to your Wi-Fi.

鉴于您可以控制在路由器中，您可以在物理上编写代码，该代码拦截通过路由器传输的数据包，并在发送到各种连接设备的HTTP页面中插入此类警告。这假设他们使用HTTP来查看普通页面。当然，您也可以在其他协议中插入警告。根据您的司法管辖区，这可能是非法的，或有其他法律问题。我会考虑这样做是一个坏主意™。

Given that you control the router, it would be physically possible for you to write code which intercepted the packets being transmitted through the router and inserted such a warning within the HTTP of pages being sent to the various connected devices. This assumes that they are using HTTP to view normal pages. You could, of course, also insert a warning in other protocols. Depending on your jurisdiction this might be illegal, or have other legal issues. I would consider doing so to be a Bad Idea™.

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