SwiftNIO local proxy, intercept HTTP request params

Question

Created Oct ’21

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I'm using default example (from swiftNIO repository https://github.com/apple/swift-nio-examples/tree/main/connect-proxy) of SwiftNIO connect proxy. Working in PacketTunnelProvider extension.

In proxy I have excess to headers and for HTTPS requests I can get HOST and PORT, without GET params.

Is it possible to get excess to params? What way it should be?

I also see applications like proxyman, which can show GET request with params, but only after installing root certificate for device and this way is not good for me.

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Answer 1

Systems Engineer OP

Apple

Oct ’21

I'm using default example (from swiftNIO repository https://github.com/apple/swift-nio-examples/tree/main/connect-proxy) of SwiftNIO connect proxy. Working in PacketTunnelProvider extension.

Using a proxy server in a Network Extension to route traffic from the device through a packet tunnel is not a recommended use case here. If you need to claim traffic, just claim the app or routes that you need to send through the tunnel instead of building a proxy server into your network extension to reroute this traffic.

Matt Eaton
DTS Engineering, CoreOS
meaton3@apple.com

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Answer 2

MaxK03 OP

Oct ’22

Could you elaborate on that? What do you mean by "claim the app or routes that you need"?

I want to use PacketTunnelProvider to basically log all in- or outgoing network packets. Any pointers in the right direction are very welcome :)

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Answer 3

DTS Engineer OP

Apple

Oct ’22

I want to use PacketTunnelProvider to basically log all in- or outgoing network packets.

The packet tunnel provider infrastructure was designed to allow developers to create VPN clients. Using it ‘off label’ — for example, to build a debugging tool — is not something we support. See TN3120 Expected use cases for Network Extension packet tunnel providers.

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

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Answer 4

MaxK03 OP

Oct ’22

Thank you for your reply and the useful information.

I ended up creating a new thread https://developer.apple.com/forums/thread/716813. Any help would be very welcome :).

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