iOS11 error: Received XPC error Connection invalid for message type 3 kCFNetworkAgentXPCMessage

I have an app that works fine on iOS10 when used in conjunction with a per-app VPN connection, a device-wide VPN connection or no VPN connection. On iOS11, there are connection issues when used in conjunction with a per-app VPN connection (works fine with device-wide and no VPN). The app logs just show connection failure. The device console shows the following:


(CFNetwork)[318] <Error>: Received XPC error Connection invalid for message type 3 kCFNetworkAgentXPCMessageTypePACQuery


We also see errors like this:


iPhone iOSAppProxyProvider[258] <Notice>: void cfsocket_callback(CFSocketRef, CFSocketCallBackType, CFDataRef, const void *, void *):140 BYPASS: Socket Connection [<IP address>:443] failed due to error Operation timed out


Any suggestions to resolve this or anyway to generate additional debug information for these APIs?

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crwallace
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On iOS 11, there are connection issues when used in conjunction with a per-app VPN connection (works fine with device-wide and no VPN).

Are you developing the per-app VPN solution yourself? Or using someone else’s?

Share and Enjoy
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Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware 

let myEmail = "eskimo" + "1" + "@apple.com"
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eskimo
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We are using someone else's. Our app is just subject to the commercial per-app VPN.

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crwallace
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We are using someone else's.

You should escalate this via that product’s support channel. Any resolution to this issue will require a detailed analysis of their code and how it interacts with the OS, and they’re the only folks who can do that.

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware 

let myEmail = "eskimo" + "1" + "@apple.com"
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eskimo
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Sorry to revive such an ancient thread, but I just encountered the same thing in macOS. Presumably its the same as on iOS...


If you get errors like this in your log, but everything else seems to work OK:


(CFNetwork)[318] <Error>: Received XPC error Connection invalid for message type 3 kCFNetworkAgentXPCMessageTypePACQuery


Its failing because its trying to download the PAC file for proxy autodiscovery - possibly because your network doesn't support that. So turn off 'Automatic Proxy Discovery'.


On MacOS: System Preferences//Network/Wi-Fi/Advanced/Proxies. Uncheck the 'Auto Proxy Discovery' checkbox there


On iOS: Settings/Wi-Fi/; select the 'i' by the network you use; 'HTTP Proxy/Configure Proxy'. Set it to 'Off'


Once I'd done that (on my Mac) these irritating log messages stopped 🙂

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wilsoncpw
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