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A single drift-rate sample computed between two consecutive sync updates was clamped against CLOCK_ADJTIME_SLEWLIMIT_PPM - the hardware's slew-rate safety limit, not a bound on how large a real crystal-oscillator drift measurement can plausibly be. An abnormally short or long measurement interval (e.g. right after a clock source outage/reconnect, or a burst of closely spaced sync packets following packet loss) could therefore produce a wildly implausible sample that still passed the check and corrupted the long-term drift_ppb average. Add CONFIG_NETUTILS_PTPD_MAX_DRIFT_PPB (default 500000, well above any real crystal's few-hundred-ppm drift) as a dedicated plausibility bound, intentionally much tighter than CLOCK_ADJTIME_SLEWLIMIT_PPM. A sample outside this bound is discarded and the previous averaged drift_ppb is kept unchanged instead of being corrupted. Assisted-by: Claude:claude-sonnet-5 Signed-off-by: Daniel P. Carvalho <danieloak@gmail.com> |
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| CMakeLists.txt | ||
| Kconfig | ||
| Make.defs | ||
| Makefile | ||
| ptpd.c | ||
| ptpv2.h | ||