feat: avoid waking async_request when record updates are not relevant

[bdraco]

Because zc.async_wait() was used, every incoming packet would wake up async_request even if there were not changes.

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (41ea06a) 99.77% compared to head (fc5a986) 99.77%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1153   +/-   ##
=======================================
  Coverage   99.77%   99.77%           
=======================================
  Files          22       22           
  Lines        2646     2654    +8     
  Branches      461      463    +2     
=======================================
+ Hits         2640     2648    +8     
  Misses          4        4           
  Partials        2        2           

Impacted Files	Coverage Δ
src/zeroconf/__init__.py	100.00% <100.00%> (ø)
src/zeroconf/_services/info.py	100.00% <100.00%> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.

[bdraco]

This should fix all the races with ip address ordering

[bdraco]

I think we are missing coverage for a few of these races.

We also didn't handle server name changing before correctly

[bdraco]

Going to need to split this into two PRs

One to fix the races with the server name changing

• needs test for that
• needs test for ipv6 address seen last is first
• needs test for invalid dnsaddress in cache

One to avoid the awake on every packet

[bdraco]

There is another bug here

self.server needs to start out set to None as well as server_key.

Otherwise we could have addresses in the cache for the ptr name but it actually uses a different name in the dev record and a different address so we end up returning the addresses for the ptr name instead of the srv

Everything that returns self.server might need to be adjusted as well

[bdraco]

Still need a test for the server changing via a DNSService update

Need to start off with the original name and than change it