My application caches reverse lookups of IP addresses. I use DNSServiceQueryRecord() in order to obtain the ttl of the returned record.
Many of the lookups return the same ttl of 4502 which seems erroneous. Requesting the same address repeatedly returns that value when I would expect it to be decreasing.
I submitted a Feedback with sample project attached.
Feedback: FB23574201
I would expect it to be decreasing.
That’s not how this API works. Quoting the doc comments in <dns_sd.h>:
The ttl value is not updated when the daemon answers from the cache
What are you trying to do with this value? There may be a better option.
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