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[mdns] add verbose logging (#11793)

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This commit introduces a verbose logging feature in the mDNS module to
aid in development and debugging by providing detailed logs of mDNS
traffic.

The feature is enabled at build-time via the config option
`OPENTHREAD_CONFIG_MULTICAST_DNS_VERBOSE_LOGGING_ENABLE`
(mapping to the `OT_MDNS_VERBOSE` CMake option). When enabled,
logging can be controlled at run-time using the new
`otMdnsSetVerboseLoggingEnabled()` API and the corresponding
`mdns verboselogging` CLI command.

The initial state on startup can be configured using
`OPENTHREAD_CONFIG_MULTICAST_DNS_DEFAULT_VERBOSE_LOGGING_STATE`
(mapping to the `OT_MDNS_VERBOSE_STATE` CMake option).

When active, this feature logs the content of every sent and received
mDNS message, including the header, questions, and all resource
records. The logs are emitted at the `OT_LOG_LEVEL_NONE` level to
ensure they are always captured, regardless of the active log level
configuration.
This commit is contained in:
Abtin Keshavarzian
2025-08-11 16:14:49 -07:00
committed by GitHub
parent 4fb1a5da74
commit 736808828d
11 changed files with 489 additions and 4 deletions
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etc/cmake/options.cmake
+2
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@@ -222,6 +222,8 @@ ot_option(OT_LINK_RAW OPENTHREAD_CONFIG_LINK_RAW_ENABLE "link raw service")
ot_option(OT_LOG_LEVEL_DYNAMIC OPENTHREAD_CONFIG_LOG_LEVEL_DYNAMIC_ENABLE "dynamic log level control")
ot_option(OT_MAC_FILTER OPENTHREAD_CONFIG_MAC_FILTER_ENABLE "mac filter")
ot_option(OT_MDNS OPENTHREAD_CONFIG_MULTICAST_DNS_ENABLE "multicast DNS (mDNS)")
ot_option(OT_MDNS_VERBOSE OPENTHREAD_CONFIG_MULTICAST_DNS_VERBOSE_LOGGING_ENABLE "mDNS verbose logging")
ot_option(OT_MDNS_VERBOSE_STATE OPENTHREAD_CONFIG_MULTICAST_DEFAULT_DNS_VERBOSE_LOGGING_STATE "mDNS verbose state on start")
ot_option(OT_MESH_DIAG OPENTHREAD_CONFIG_MESH_DIAG_ENABLE "mesh diag")
ot_option(OT_MESSAGE_USE_HEAP OPENTHREAD_CONFIG_MESSAGE_USE_HEAP_ENABLE "heap allocator for message buffers")
ot_option(OT_MLE_LONG_ROUTES OPENTHREAD_CONFIG_MLE_LONG_ROUTES_ENABLE "MLE long routes extension (experimental)")