phc

type EthtoolTSinfo struct {
	Cmd            uint32
	SOtimestamping uint32
	PHCIndex       int32
	TXTypes        uint32
	TXReserved     [3]uint32
	RXFilters      uint32
	RXReserved     [3]uint32
}

type IfaceData struct {
	Iface  net.Interface
	TSInfo EthtoolTSinfo
}

type Ifreq struct {
	Name [unix.IFNAMSIZ]byte
	Data uintptr
}

type PTPClockCaps struct {
	MaxAdj  int32 /* Maximum frequency adjustment in parts per billon. */
	NAalarm int32 /* Number of programmable alarms. */
	NExtTs  int32 /* Number of external time stamp channels. */
	NPerOut int32 /* Number of programmable periodic signals. */
	PPS     int32 /* Whether the clock supports a PPS callback. */
	NPins   int32 /* Number of input/output pins. */
	/* Whether the clock supports precise system-device cross timestamps */
	CrossTimestamping int32
	/* Whether the clock supports adjust phase */
	AdjustPhase int32
	Rsv         [12]int32 /* Reserved for future use. */
}

type PTPClockTime struct {
	Sec      int64  /* seconds */
	NSec     uint32 /* nanoseconds */
	Reserved uint32
}

type PTPSysOffsetExtended struct {
	NSamples uint32    /* Desired number of measurements. */
	Reserved [3]uint32 /* Reserved for future use. */
	/*
	 * Array of [system, phc, system] time stamps. The kernel will provide
	 * 3*n_samples time stamps.
	 * - system time right before reading the lowest bits of the PHC timestamp
	 * - PHC time
	 * - system time immediately after reading the lowest bits of the PHC timestamp
	 */
	TS [ptpMaxSamples][3]PTPClockTime
}

type SysoffResult struct {
	Offset  time.Duration
	Delay   time.Duration
	SysTime time.Time
	PHCTime time.Time
}

type TimeMethod string