ntp

Sep 24, 2026

Changes in this version

+ var DelayUnrepresentable = time.Duration(math.MinInt64)

+ var ErrAuthNAK = errors.New("authentication NAK received")

+ var ErrExtensionsNotSupported = errors.New("NTPV3 does not support extension fields")

+ var ErrInvalidDraftID = errors.New("invalid draft ID value in response")

+ var ErrInvalidExtensionField = errors.New("invalid extension field in response")

+ var ErrInvalidReferenceRequest = errors.New("invalid reference ID request")

+ var ErrServerNotSynchronized = errors.New("NTPv5 server not synchronized")

+ var ErrUnexpectedCorrectionField = errors.New("unexpected correction extension field in response")

+ type Correction struct

+ OriginDelay time.Duration

+ OriginPathID uint16

+ ReturnDelay time.Duration

+ ReturnPathID uint16

+ type ProtocolTimestamps struct

+ ClientRecv time.Time

+ ClientXmit time.Time

+ ServerRecv time.Time

+ ServerXmit time.Time

type QueryOptions

+ AdditionalTimescales []Timescale

+ RequestCorrection bool

+ RequestInterleavedMode bool

+ RequestMonotonic bool

+ RequestReferenceID ReferenceIDRequest

+ RequestReferenceTime bool

+ RequestSupportedVersions bool

+ ServerCookie uint64

+ Timescale Timescale

+ type ReferenceIDRequest struct

+ ChunkOffset uint16

+ ChunkSize uint16

type Response

+ Correction Correction

+ Era uint8

+ Flags ResponseFlags

+ MonotonicEpochID uint32

+ MonotonicOffset time.Duration

+ ReferenceIDFilterValues []byte

+ ServerCookie uint64

+ SupportedVersions []int

+ Timescale Timescale

+ TimescaleOffsets []TimescaleOffset

+ Timestamps ProtocolTimestamps

+ func (r *Response) Log(w io.Writer)

+ type ResponseFlags uint32

+ const FlagInterleaved

+ const FlagSynchronized

+ type Timescale uint8

+ const TimescaleTAI

+ const TimescaleUT1

+ const TimescaleUTC

+ const TimescaleUTCSmeared

+ type TimescaleOffset struct

+ Offset time.Duration

+ Timescale Timescale

Sep 29, 2025

Changes in this version

type QueryOptions

+ GetSystemTime func() time.Time

May 2, 2024

Changes in this version

type Response

+ Version int

Dec 24, 2023

Changes in this version

type AuthType

+ const AuthAES256

Jul 29, 2023

Changes in this version

type Response

+ func (r *Response) ReferenceString() string

Jul 13, 2023

Changes in this version

+ var ErrAuthFailed = errors.New("authentication failed")

+ var ErrInvalidAuthKey = errors.New("invalid authentication key")

+ var ErrInvalidDispersion = errors.New("invalid dispersion in response")

+ var ErrInvalidLeapSecond = errors.New("invalid leap second in response")

+ var ErrInvalidMode = errors.New("invalid mode in response")

+ var ErrInvalidProtocolVersion = errors.New("invalid protocol version requested")

+ var ErrInvalidStratum = errors.New("invalid stratum in response")

+ var ErrInvalidTime = errors.New("invalid time reported")

+ var ErrInvalidTransmitTime = errors.New("invalid transmit time in response")

+ var ErrKissOfDeath = errors.New("kiss of death received")

+ var ErrServerClockFreshness = errors.New("server clock not fresh")

+ var ErrServerResponseMismatch = errors.New("server response didn't match request")

+ var ErrServerTickedBackwards = errors.New("server clock ticked backwards")

+ type AuthOptions struct

+ Key string

+ KeyID uint16

+ Type AuthType

+ type AuthType int

+ const AuthAES128

+ const AuthMD5

+ const AuthNone

+ const AuthSHA1

+ const AuthSHA256

+ const AuthSHA512

+ type Extension interface

+ ProcessQuery func(buf *bytes.Buffer) error

+ ProcessResponse func(buf []byte) error

type QueryOptions

+ Auth AuthOptions

+ Dialer func(localAddress, remoteAddress string) (net.Conn, error)

+ Extensions []Extension

type Response

+ func (r *Response) IsKissOfDeath() bool

Jun 13, 2023

Changes in this version

type QueryOptions

+ Dial dialFn

Oct 20, 2017

Changes in this version

type Response

+ KissCode string

Sep 30, 2017

Changes in this version

+ const LeapAddSecond

+ const LeapDelSecond

+ const LeapNoWarning

+ const LeapNotInSync

+ const MaxStratum

+ func Time(host string) (time.Time, error)

+ func TimeV(host string, version int) (time.Time, error)

+ type LeapIndicator uint8

+ type QueryOptions struct

+ LocalAddress string

+ Port int

+ TTL int

+ Timeout time.Duration

+ Version int

+ type Response struct

+ ClockOffset time.Duration

+ Leap LeapIndicator

+ MinError time.Duration

+ Poll time.Duration

+ Precision time.Duration

+ RTT time.Duration

+ ReferenceID uint32

+ ReferenceTime time.Time

+ RootDelay time.Duration

+ RootDispersion time.Duration

+ RootDistance time.Duration

+ Stratum uint8

+ Time time.Time

+ func Query(host string) (*Response, error)

+ func QueryWithOptions(host string, opt QueryOptions) (*Response, error)

+ func (r *Response) Validate() error