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[mdns] disable OT_MDNS explicitly when using platform mDNS#3230

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martinzi wants to merge 1 commit intoopenthread:mainfrom
martinzi:fix-openthread-mdns-disabled
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[mdns] disable OT_MDNS explicitly when using platform mDNS#3230
martinzi wants to merge 1 commit intoopenthread:mainfrom
martinzi:fix-openthread-mdns-disabled

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Summary of Changes

Hello @martinzi, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refines the mDNS configuration within the OpenThread Border Router (OTBR) build system. It ensures that OpenThread's internal mDNS implementation is explicitly turned off when the system is set up to utilize a platform-specific mDNS service, thereby avoiding redundant services and potential conflicts.

Highlights

  • mDNS Configuration: Explicitly disabled OpenThread's internal mDNS (OT_MDNS) when the build system is configured to use a platform-provided mDNS service, preventing potential conflicts.

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Changelog
  • third_party/openthread/CMakeLists.txt
    • Added a configuration line to explicitly disable OpenThread's mDNS when a platform mDNS is selected.
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Code Review

This pull request introduces a small but important change to the CMake configuration. By explicitly setting OT_MDNS to OFF when a platform mDNS is being used, it prevents potential build issues caused by cached variables. This makes the build configuration more robust. The change is correct and well-targeted.

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codecov bot commented Feb 16, 2026

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 34.75%. Comparing base (2b41187) to head (86f3a2a).
⚠️ Report is 1368 commits behind head on main.

Additional details and impacted files
@@             Coverage Diff             @@
##             main    #3230       +/-   ##
===========================================
- Coverage   55.77%   34.75%   -21.02%     
===========================================
  Files          87      145       +58     
  Lines        6890    17751    +10861     
  Branches        0     1470     +1470     
===========================================
+ Hits         3843     6170     +2327     
- Misses       3047    11256     +8209     
- Partials        0      325      +325     

☔ View full report in Codecov by Sentry.
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set(OT_SRP_ADV_PROXY ON CACHE STRING "enable SRP Advertising Proxy" FORCE)
set(OT_TREL_MANAGE_DNSSD ON CACHE STRING "TREL to manage DNSSD and peer discovery" FORCE)
else()
set(OT_MDNS OFF CACHE STRING "disable OpenThread mDNS when using platform mDNS" FORCE)
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This is fine to add, but by default it is also disabled in OT core.

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Agree, it is more a minor improvement preventing potential side effects in a development context.

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2 participants