Module timestamp 

Structs

NtpDuration

High-resolution signed duration for offset/delay calculations. Stored as signed nanoseconds in i128 for sub-nanosecond precision with the lower 32 bits representing fractional nanoseconds.

NtpTimestamp

NTP uses a 64-bit timestamp: 32-bit seconds since 1900-01-01 + 32-bit fraction. Stored as a single u64 for arithmetic efficiency. Upper 32 bits = seconds, lower 32 bits = fractional seconds.

PtpTimestamp

PTP uses an 80-bit timestamp: 48-bit seconds + 32-bit nanoseconds.