Where is NEConfigurationErrorDomain declared?

Question

Created Feb ’23

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When attempting to configure a network extension on iOS in the absence of user authorization or MDM provisioning, the call to saveToPreferences() on NEDNSProxyManager fails with an error of code 10 in domain "NEConfigurationErrorDomain". I want to test for this condition in order to present a more helpful message to the user.

However, it appears that NEConfigurationErrorDomain is not declared in any system header. Why not? How do I test for this? Must I resort to a comparison against a string literal "NEConfigurationErrorDomain"?

What other error codes exist in this error domain?

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Answer 1

Systems Engineer OP

Apple

Feb ’23

What other error codes exist in this error domain?

Does the error that's emitted from the saveToPreferences completion handler not fit into a switch statement for NEDNSProxyManagerError? See the documentation here.

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Answer 2

DTS Engineer OP

Apple

Feb ’23

You are correct that NEConfigurationErrorDomain is not in a public header. If NE is ‘leaking’ such errors to you, that’s a bug. You should be getting a NEDNSProxyManagerError, like Matt said, ideally with the NEConfigurationErrorDomain error as the underlying error.

If you are seeing these errors, please file a bug about that and post your bug number here, just for the record.

FYI, error 10 in the NEConfigurationErrorDomain domains translates to, unsurprisingly, ‘permission denied’.

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
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Answer 3

zygoat OP

Feb ’23

@Matt: No it doesn't; NEDNSProxyManagerError is an enum representing error codes in the NEDNSProxyErrorDomain, but the error returned is not in that domain. (Even if it were, its integer value exceeds the enum.)

@eskimo: Thanks for confirming this. Filed FB12017478.

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Answer 4

DTS Engineer OP

Apple

Feb ’23

Thanks for filing FB12017478.

By a weird coincidence, I actually reproduced this yesterday while helping another developer as part of a DTS tech suport incident.

it's silently transforming

Interesting. I don’t use at-names much so I’ve not noticed this myself.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

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