I‘m a computer developer, nowadays I’m researching on captive portal, is there any API to do the captive portal detection or to know whether the wi-fi is captive or not？
Captive Portal Detect
Apple platforms support captive networks something like this:
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On joining the network, run a test to see if it looks like a captive network. If it doesn’t, bring up the networking normally.
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If it does, run the captive network infrastructure. While this is running, the Wi-Fi interface is active but not the default route.
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If the captive network infrastructure fails, leave the network.
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If it works, and so the network is no longer captive, switch the default route.
With that in mind, let’s answer this questions:
is there any API … to know whether the wi-fi is captive or not？
Not really. If the system is able to detect that the network is captive then a normal app won’t ‘see’ it because it only becomes the default route after the system has successfully authenticated.
Conversely, if the network ‘lies’ successfully, the system won’t see it as a captive network and thus an API wouldn’t help you.
is there any API to do the captive portal detection … ？
An app is able to integrate with the captive network infrastructure via the Hotspot Helper API.
Share and Enjoy
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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
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