How to insert EDNS0 packet in DNSProxyProvider

App & System Services Core OS
leungky541@gmail.com OP
Created Mar ’23
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Hi everyone,

I'm developing a DNSProxyProvider app to route the DNS traffic to my DNS server. I have followed documentation to implement handleNewFlow function.

And I want to insert extra information (eg. device id, device serial number) using EDNS0 format, does anyone know how to modify the DNS data in iOS swift?

Any input would be appreciated!

Best Regards, Leo

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DTS Engineer OP
Apple
Mar ’23

The iOS SDK does not have APIs for manipulating DNS messages at that level. You will need to either write or acquire a library for parsing and rendering DNS messages.

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