iOS如何强制连接以独占使用安全连接？(How will iOS enforce connections to use a secure connection exclusively?)

从2017年开始， Apple将要求为iOS应用程序提供HTTPS连接 。 应用程序将被迫使用基于TLS的ATS成功建立连接。

我目前正在为客户开发网络测量工具。 使用低级套接字接口，目的是通过TCP或UDP将数据包传输到网络中的服务器，以便测量WiFi连接的速度。

由于目前尚不清楚苹果将如何执行他们的新规则，我们发现很难估计我们的应用程序将如何受其影响。 有没有更多的信息？ 它们适用于哪种类型的连接？ 根据iOS将连接标记为不安全的特征？

Starting 2017, Apple will require HTTPS connections for iOS apps. Apps will be forced to use ATS, based on TLS, to establish a connection successfully.

I'm currently developing a network measurement tool for a client. Using the low-level socket interfaces, the purpose is to transmit packets over TCP or UDP to a server in the network, in order to measure the speed of the WiFi connection.

As it is not clear how Apple will enforce their new rules, we find it hard to estimate how our application will be influenced by them. Is there any more information available on this? On which types of connections do they apply? Based on what characteristics will iOS label a connection as insecure?