The NTP packet consists of an integral number of 32-bit (4 octet) words in network byte order. The packet format consists of three components: the header itself, one or more optional extension fields (for v4), and an optional message authentication code (MAC). Currently the extension fields are not supported. The NTP header is: More...

#include <NtpLayer.h>

Inheritance diagram for pcpp::NtpLayer:

Public Types
enum	LeapIndicator { NoWarning = 0, Last61Secs, Last59Secs, Unknown }

enum	Mode { Reserved = 0, SymActive, SymPassive, Client, Server, Broadcast, Control, PrivateUse }

enum	ClockSource { GOES = ('G') \| ('O' << 8) \| ('E' << 16) \| ('S' << 24), GPS = ('G') \| ('P' << 8) \| ('S' << 16), GAL = ('G') \| ('A' << 8) \| ('L' << 16), PPS = ('P') \| ('P' << 8) \| ('S' << 16), IRIG = ('I') \| ('R' << 8) \| ('I' << 16) \| ('G' << 24), WWVB = ('W') \| ('W' << 8) \| ('V' << 16) \| ('B' << 24), DCF = ('D') \| ('C' << 8) \| ('F' << 16), HBG = ('H') \| ('B' << 8) \| ('G' << 16), MSF = ('M') \| ('S' << 8) \| ('F' << 16), JJY = ('J') \| ('J' << 8) \| ('Y' << 16), LORC = ('L') \| ('O' << 8) \| ('R' << 16) \| ('C' << 24), TDF = ('T') \| ('D' << 8) \| ('F' << 16), CHU = ('C') \| ('H' << 8) \| ('U' << 16), WWV = ('W') \| ('W' << 8) \| ('V' << 16), WWVH = ('W') \| ('W' << 8) \| ('V' << 16) \| ('H' << 24), NIST = ('N') \| ('I' << 8) \| ('S' << 16) \| ('T' << 24), ACTS = ('A') \| ('C' << 8) \| ('T' << 16) \| ('S' << 24), USNO = ('U') \| ('S' << 8) \| ('N' << 16) \| ('O' << 24), PTB = ('P') \| ('T' << 8) \| ('B' << 16), DCFa = ('D') \| ('C' << 8) \| ('F' << 16) \| ('a' << 24), DCFp = ('D') \| ('C' << 8) \| ('F' << 16) \| ('p' << 24), GPSs = ('G') \| ('P' << 8) \| ('S' << 16) \| ('s' << 24), GPSi = ('G') \| ('P' << 8) \| ('S' << 16) \| ('i' << 24), GLNs = ('G') \| ('L' << 8) \| ('N' << 16) \| ('s' << 24), GLNi = ('G') \| ('L' << 8) \| ('N' << 16) \| ('i' << 24), LCL = ('L') \| ('C' << 8) \| ('L' << 16), LOCL = ('L') \| ('O' << 8) \| ('C' << 16) \| ('L' << 24), DCN = ('D') \| ('C' << 8) \| ('N' << 16), TSP = ('T') \| ('S' << 8) \| ('P' << 16), DTS = ('D') \| ('T' << 8) \| ('S' << 16), ATOM = ('A') \| ('T' << 8) \| ('O' << 16) \| ('M' << 24), VLF = ('V') \| ('L' << 8) \| ('F' << 16) }

Public Member Functions
	NtpLayer (uint8_t data, size_t dataLen, Layer prevLayer, Packet *packet)

	NtpLayer ()

LeapIndicator	getLeapIndicator () const

void	setLeapIndicator (LeapIndicator val)

uint8_t	getVersion () const

void	setVersion (uint8_t val)

Mode	getMode () const

std::string	getModeString () const

void	setMode (Mode val)

uint8_t	getStratum () const

void	setStratum (uint8_t val)

int8_t	getPollInterval () const

void	setPollInterval (int8_t val)

double	getPollIntervalInSecs () const

int8_t	getPrecision () const

void	setPrecision (int8_t val)

double	getPrecisionInSecs () const

uint32_t	getRootDelay () const

void	setRootDelay (uint32_t val)

double	getRootDelayInSecs () const

void	setRootDelayInSecs (double val)

uint32_t	getRootDispersion () const

void	setRootDispersion (uint32_t val)

double	getRootDispersionInSecs () const

void	setRootDispersionInSecs (double val)

uint32_t	getReferenceIdentifier () const

void	setReferenceIdentifier (IPv4Address val)

void	setReferenceIdentifier (ClockSource val)

std::string	getReferenceIdentifierString () const

uint64_t	getReferenceTimestamp () const

void	setReferenceTimestamp (uint64_t val)

double	getReferenceTimestampInSecs () const

void	setReferenceTimestampInSecs (double val)

std::string	getReferenceTimestampAsString ()

uint64_t	getOriginTimestamp () const

void	setOriginTimestamp (uint64_t val)

double	getOriginTimestampInSecs () const

void	setOriginTimestampInSecs (double val)

std::string	getOriginTimestampAsString ()

uint64_t	getReceiveTimestamp () const

void	setReceiveTimestamp (uint64_t val)

double	getReceiveTimestampInSecs () const

void	setReceiveTimestampInSecs (double val)

std::string	getReceiveTimestampAsString ()

uint64_t	getTransmitTimestamp () const

void	setTransmitTimestamp (uint64_t val)

double	getTransmitTimestampInSecs () const

void	setTransmitTimestampInSecs (double val)

std::string	getTransmitTimestampAsString ()

uint32_t	getKeyID () const

std::string	getDigest () const

void	parseNextLayer ()
	Parses the next layer. NTP is the always last so does nothing for this layer.

size_t	getHeaderLen () const

void	computeCalculateFields ()
	Does nothing for this layer.

OsiModelLayer	getOsiModelLayer () const

std::string	toString () const

Public Member Functions inherited from pcpp::Layer
virtual	~Layer ()

Layer *	getNextLayer () const

Layer *	getPrevLayer () const

ProtocolType	getProtocol () const

uint8_t *	getData () const

size_t	getDataLen () const

uint8_t *	getLayerPayload () const

size_t	getLayerPayloadSize () const

bool	isAllocatedToPacket () const

void	copyData (uint8_t *toArr) const

uint8_t *	getDataPtr (size_t offset=0) const

Static Public Member Functions
static double	convertFromShortFormat (const uint32_t val)

static double	convertFromTimestampFormat (const uint64_t val)

static uint32_t	convertToShortFormat (const double val)

static uint64_t	convertToTimestampFormat (const double val)

static std::string	convertToIsoFormat (const double timestamp)

static std::string	convertToIsoFormat (const uint64_t timestampInNTPformat)

static bool	isDataValid (const uint8_t *data, size_t dataSize)

static bool	isNTPPort (uint16_t port)

Detailed Description

The NTP packet consists of an integral number of 32-bit (4 octet) words in network byte order. The packet format consists of three components: the header itself, one or more optional extension fields (for v4), and an optional message authentication code (MAC). Currently the extension fields are not supported. The NTP header is:

Represents a NTP (Network Time Protocol) layer

  0                   1                   2                   3
  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |LI | VN  |Mode |    Stratum     |     Poll      |  Precision   |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |                         Root Delay                            |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |                         Root Dispersion                       |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |                          Reference ID                         |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |                                                               |
 +                     Reference Timestamp (64)                  +
 |                                                               |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |                                                               |
 +                      Origin Timestamp (64)                    +
 |                                                               |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |                                                               |
 +                      Receive Timestamp (64)                   +
 |                                                               |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |                                                               |
 +                      Transmit Timestamp (64)                  +
 |                                                               |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |                                                               |
 .                                                               .
 .                Extension Field 1 (variable, only v4)          .
 .                                                               .
 |                                                               |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |                                                               |
 .                                                               .
 .                Extension Field 1 (variable, only v4)          .
 .                                                               .
 |                                                               |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |                          Key Identifier                       |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |                                                               |
 |                   dgst (128 for v4, 64 for v3)                |
 |                                                               |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Member Enumeration Documentation

◆ ClockSource

enum pcpp::NtpLayer::ClockSource

32-bit code identifying the particular server or reference clock. The interpretation depends on the value in the stratum field.

Enumerator
GOES	Geosynchronous Orbit Environment Satellite.
GPS	Global Position System.
GAL	Galileo Positioning System.
PPS	Generic pulse-per-second.
IRIG	Inter-Range Instrumentation Group.
WWVB	LF Radio WWVB Ft. Collins, CO 60 kHz.
DCF	LF Radio DCF77 Mainflingen, DE 77.5 kHz.
HBG	LF Radio HBG Prangins, HB 75 kHz.
MSF	LF Radio MSF Anthorn, UK 60 kHz.
JJY	LF Radio JJY Fukushima, JP 40 kHz, Saga, JP 60 kHz.
LORC	MF Radio LORAN C station, 100 kHz.
TDF	MF Radio Allouis, FR 162 kHz.
CHU	HF Radio CHU Ottawa, Ontario.
WWV	HF Radio WWV Ft. Collins, CO.
WWVH	HF Radio WWVH Kauai, HI.
NIST	NIST telephone modem.
ACTS	NIST telephone modem.
USNO	USNO telephone modem.
PTB	European telephone modem.
DCFa	Meinberg DCF77 with amplitude modulation (Ref: https://www.meinbergglobal.com/english/info/ntp-refid.htm)
DCFp	Meinberg DCF77 with phase modulation)/pseudo random phase modulation (Ref: https://www.meinbergglobal.com/english/info/ntp-refid.htm)
GPSs	Meinberg GPS (with shared memory access) (Ref: https://www.meinbergglobal.com/english/info/ntp-refid.htm)
GPSi	Meinberg GPS (with interrupt based access) (Ref: https://www.meinbergglobal.com/english/info/ntp-refid.htm)
GLNs	Meinberg GPS/GLONASS (with shared memory access) (Ref: https://www.meinbergglobal.com/english/info/ntp-refid.htm)
GLNi	Meinberg GPS/GLONASS (with interrupt based access) (Ref: https://www.meinbergglobal.com/english/info/ntp-refid.htm)
LCL	Meinberg Undisciplined local clock (Ref: https://www.meinbergglobal.com/english/info/ntp-refid.htm)
LOCL	Meinberg Undisciplined local clock (Ref: https://www.meinbergglobal.com/english/info/ntp-refid.htm)
DCN	DCN routing protocol.
TSP	TSP time protocol.
DTS	Digital Time Service.
ATOM	Atomic clock (calibrated)
VLF	VLF radio (OMEGA, etc.)

◆ LeapIndicator

enum pcpp::NtpLayer::LeapIndicator

Warning of an impending leap second to be inserted or deleted in the last minute of the current month

Enumerator
NoWarning	Normal, no leap second.
Last61Secs	Last minute of the day has 61 seconds.
Last59Secs	Last minute of the day has 59 seconds.
Unknown	Unknown (clock unsynchronized)

◆ Mode

enum pcpp::NtpLayer::Mode

Representing the NTP association modes

Enumerator
Reserved	Reserved variable.
SymActive	Symmetrically active.
SymPassive	Symmetrically passive.
Client	Client mode.
Server	Server mode.
Broadcast	Broadcasting mode.
Control	NTP control messages.
PrivateUse	Reserved for private use.

Constructor & Destructor Documentation

◆ NtpLayer() [1/2]

pcpp::NtpLayer::NtpLayer	(	uint8_t *	data,
		size_t	dataLen,
		Layer *	prevLayer,
		Packet *	packet
	)

inline

A constructor that creates the layer from an existing packet raw data

Parameters

[in]	data	A pointer to the raw data
[in]	dataLen	Size of the data in bytes
[in]	prevLayer	A pointer to the previous layer
[in]	packet	A pointer to the Packet instance where layer will be stored in

◆ NtpLayer() [2/2]

pcpp::NtpLayer::NtpLayer ( )

Empty c'tor

Member Function Documentation

◆ convertFromShortFormat()

static double pcpp::NtpLayer::convertFromShortFormat ( const uint32_t val )

static

Convert NTP short format to seconds from the Unix Epoch

Parameters

[in] val Value in NTP short format

Returns: Value in seconds from Unix Epoch (1 Jan 1970)

◆ convertFromTimestampFormat()

static double pcpp::NtpLayer::convertFromTimestampFormat ( const uint64_t val )

static

Convert NTP timestamp format to seconds from the Unix Epoch

Parameters

[in] val Value in NTP timestamp format

Returns: Value in seconds from Unix Epoch (1 Jan 1970)

◆ convertToIsoFormat() [1/2]

static std::string pcpp::NtpLayer::convertToIsoFormat ( const double timestamp )

static

A static method to convert timestamp value to ISO8601 date time format

Parameters

[in] timestamp Value in seconds from the Unix Epoch

Returns: std::string ISO8601 formatted string

◆ convertToIsoFormat() [2/2]

static std::string pcpp::NtpLayer::convertToIsoFormat ( const uint64_t timestampInNTPformat )

static

A static method to convert timestamp value to ISO8601 date time format

Parameters

[in] timestampInNTPformat Value in NTP timestamp format

Returns: std::string ISO8601 formatted string

◆ convertToShortFormat()

static uint32_t pcpp::NtpLayer::convertToShortFormat ( const double val )

static

Convert seconds from the Unix Epoch to NTP short format

Parameters

[in] val Value in seconds from Unix Epoch (1 Jan 1970)

Returns: Value in NTP short format

◆ convertToTimestampFormat()

static uint64_t pcpp::NtpLayer::convertToTimestampFormat ( const double val )

static

Convert seconds from the Unix Epoch to NTP timestamp format

Parameters

[in] val Value in seconds from Unix Epoch (1 Jan 1970)

Returns: Value in NTP timestamp format

◆ getDigest()

std::string pcpp::NtpLayer::getDigest ( ) const

Returns: Get the digest value as hexadecimal string, empty string on unsupported version

◆ getHeaderLen()

size_t pcpp::NtpLayer::getHeaderLen ( ) const

inlinevirtual

Returns: Get the size of the layer (Including the extension and authentication fields if exists)

Implements pcpp::Layer.

◆ getKeyID()

uint32_t pcpp::NtpLayer::getKeyID ( ) const

Returns: Returns the key identifier if exists, returns 0 on unsupported NTP version or key identifier not found

◆ getLeapIndicator()

LeapIndicator pcpp::NtpLayer::getLeapIndicator ( ) const

Returns: The leap indicator

◆ getMode()

Mode pcpp::NtpLayer::getMode ( ) const

Returns: The mode value

◆ getModeString()

std::string pcpp::NtpLayer::getModeString ( ) const

Returns: The mode as string

◆ getOriginTimestamp()

uint64_t pcpp::NtpLayer::getOriginTimestamp ( ) const

Returns: The value of origin timestamp in NTP timestamp format

◆ getOriginTimestampAsString()

std::string pcpp::NtpLayer::getOriginTimestampAsString ( )

Returns: the origin timestamp value as readable string in ISO8601 format

◆ getOriginTimestampInSecs()

double pcpp::NtpLayer::getOriginTimestampInSecs ( ) const

Returns: The value of origin timestamp in seconds from Unix Epoch (1 Jan 1970)

◆ getOsiModelLayer()

OsiModelLayer pcpp::NtpLayer::getOsiModelLayer ( ) const

inlinevirtual

Returns: The OSI layer level of NTP (Application Layer).

Implements pcpp::Layer.

◆ getPollInterval()

int8_t pcpp::NtpLayer::getPollInterval ( ) const

Returns: The value of poll interval in log2 seconds

◆ getPollIntervalInSecs()

double pcpp::NtpLayer::getPollIntervalInSecs ( ) const

Returns: The value of poll interval in seconds

◆ getPrecision()

int8_t pcpp::NtpLayer::getPrecision ( ) const

Returns: The value of precision in log2 seconds

◆ getPrecisionInSecs()

double pcpp::NtpLayer::getPrecisionInSecs ( ) const

Returns: The value of precision in seconds

◆ getReceiveTimestamp()

uint64_t pcpp::NtpLayer::getReceiveTimestamp ( ) const

Returns: The value of receive timestamp in NTP timestamp format

◆ getReceiveTimestampAsString()

std::string pcpp::NtpLayer::getReceiveTimestampAsString ( )

Returns: The receive timestamp value as readable string in ISO8601 format

◆ getReceiveTimestampInSecs()

double pcpp::NtpLayer::getReceiveTimestampInSecs ( ) const

Returns: The value of receive timestampin seconds from Unix Epoch (1 Jan 1970)

◆ getReferenceIdentifier()

uint32_t pcpp::NtpLayer::getReferenceIdentifier ( ) const

Returns: The value of reference identifier

◆ getReferenceIdentifierString()

std::string pcpp::NtpLayer::getReferenceIdentifierString ( ) const

Returns: The value of reference identifier as a string. String representation of NTP clock source if stratum is 1, IPv4 address or MD5 hash of first four octets of IPv6

◆ getReferenceTimestamp()

uint64_t pcpp::NtpLayer::getReferenceTimestamp ( ) const

Returns: The value of reference timestamp in NTP timestamp format

◆ getReferenceTimestampAsString()

std::string pcpp::NtpLayer::getReferenceTimestampAsString ( )

Returns: The reference timestamp value as readable string in ISO8601 format

◆ getReferenceTimestampInSecs()

double pcpp::NtpLayer::getReferenceTimestampInSecs ( ) const

Returns: The value of reference timestamp in seconds from Unix Epoch (1 Jan 1970)

◆ getRootDelay()

uint32_t pcpp::NtpLayer::getRootDelay ( ) const

Returns: The value of root delay in NTP short format

◆ getRootDelayInSecs()

double pcpp::NtpLayer::getRootDelayInSecs ( ) const

Returns: The value of root delay in seconds

◆ getRootDispersion()

uint32_t pcpp::NtpLayer::getRootDispersion ( ) const

Returns: The value of root dispersion in NTP short format

◆ getRootDispersionInSecs()

double pcpp::NtpLayer::getRootDispersionInSecs ( ) const

Returns: The value of root dispersion in seconds

◆ getStratum()

uint8_t pcpp::NtpLayer::getStratum ( ) const

Returns: The value of stratum

◆ getTransmitTimestamp()

uint64_t pcpp::NtpLayer::getTransmitTimestamp ( ) const

Returns: The value of transmit timestamp in NTP timestamp format

◆ getTransmitTimestampAsString()

std::string pcpp::NtpLayer::getTransmitTimestampAsString ( )

Returns: The transmit timestamp value as readable string in ISO8601 format

◆ getTransmitTimestampInSecs()

double pcpp::NtpLayer::getTransmitTimestampInSecs ( ) const

Returns: The value of transmit timestamp in seconds from Unix Epoch (1 Jan 1970)

◆ getVersion()

uint8_t pcpp::NtpLayer::getVersion ( ) const

Returns: The version of NTP

◆ isDataValid()

static bool pcpp::NtpLayer::isDataValid	(	const uint8_t *	data,
		size_t	dataSize
	)

static

A static method that takes a byte array and detects whether it is a NTP message

Parameters

[in]	data	A byte array
[in]	dataSize	The byte array size (in bytes)

Returns: True if the data is identified as NTP message

◆ isNTPPort()

static bool pcpp::NtpLayer::isNTPPort ( uint16_t port )

inlinestatic

A static method that checks whether the port is considered as NTP

Parameters

[in] port The port number to be checked

◆ setLeapIndicator()

void pcpp::NtpLayer::setLeapIndicator ( LeapIndicator val )

Set the leap indicator

◆ setMode()

void pcpp::NtpLayer::setMode ( Mode val )

Set the mode

◆ setOriginTimestamp()

void pcpp::NtpLayer::setOriginTimestamp ( uint64_t val )

Set the value of origin timestamp

Parameters

[in] val Value in NTP timestamp format

◆ setOriginTimestampInSecs()

void pcpp::NtpLayer::setOriginTimestampInSecs ( double val )

Set the value of origin timestamp

Parameters

[in] val Value in seconds from Unix Epoch (1 Jan 1970)

◆ setPollInterval()

void pcpp::NtpLayer::setPollInterval ( int8_t val )

Set the value of poll interval

Parameters

[in] val Poll interval in log2 seconds

◆ setPrecision()

void pcpp::NtpLayer::setPrecision ( int8_t val )

Set the value of precision

Parameters

[in] val Precision in log2 seconds

◆ setReceiveTimestamp()

void pcpp::NtpLayer::setReceiveTimestamp ( uint64_t val )

Set the value of receive timestamp

Parameters

[in] val Value in NTP timestamp format

◆ setReceiveTimestampInSecs()

void pcpp::NtpLayer::setReceiveTimestampInSecs ( double val )

Set the value of receive timestamp

Parameters

[in] val Value in seconds from Unix Epoch (1 Jan 1970)

◆ setReferenceIdentifier() [1/2]

void pcpp::NtpLayer::setReferenceIdentifier ( IPv4Address val )

Set the value of reference identifier

Parameters

[in] val Value of the reference identifier as IPv4 address

◆ setReferenceIdentifier() [2/2]

void pcpp::NtpLayer::setReferenceIdentifier ( ClockSource val )

Set the value of reference identifier

Parameters

[in] val Value of the reference identifier as ClockSource

◆ setReferenceTimestamp()

void pcpp::NtpLayer::setReferenceTimestamp ( uint64_t val )

Set the value of reference timestamp

Parameters

[in] val Timestamp in NTP timestamp format

◆ setReferenceTimestampInSecs()

void pcpp::NtpLayer::setReferenceTimestampInSecs ( double val )

Set the value of reference timestamp

Parameters

[in] val Value in seconds from Unix Epoch (1 Jan 1970)

◆ setRootDelay()

void pcpp::NtpLayer::setRootDelay ( uint32_t val )

Set the value of root delay

Parameters

[in] val Root delay in NTP short format

◆ setRootDelayInSecs()

void pcpp::NtpLayer::setRootDelayInSecs ( double val )

Set the value of root delay

Parameters

[in] val Root delay in seconds

◆ setRootDispersion()

void pcpp::NtpLayer::setRootDispersion ( uint32_t val )

Set the value of root delay

Parameters

[in] val Root dispersion in NTP short format

◆ setRootDispersionInSecs()

void pcpp::NtpLayer::setRootDispersionInSecs ( double val )

Set the value of root dispersion

Parameters

[in] val Root dispersion in seconds

◆ setStratum()

void pcpp::NtpLayer::setStratum ( uint8_t val )

Set the value of stratum

◆ setTransmitTimestamp()

void pcpp::NtpLayer::setTransmitTimestamp ( uint64_t val )

Set the value of transmit timestamp

Parameters

[in] val Value in NTP timestamp format

◆ setTransmitTimestampInSecs()

void pcpp::NtpLayer::setTransmitTimestampInSecs ( double val )

Set the value of transmit timestamp

Parameters

[in] val Value in seconds from Unix Epoch (1 Jan 1970)

◆ setVersion()

void pcpp::NtpLayer::setVersion ( uint8_t val )

Set the version of NTP

◆ toString()

std::string pcpp::NtpLayer::toString ( ) const

virtual

Returns: Returns the protocol info as readable string

Implements pcpp::Layer.

Public Types

Public Member Functions

Static Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ ClockSource

◆ LeapIndicator

◆ Mode

Constructor & Destructor Documentation

◆ NtpLayer() [1/2]

◆ NtpLayer() [2/2]

Member Function Documentation

◆ convertFromShortFormat()

◆ convertFromTimestampFormat()

◆ convertToIsoFormat() [1/2]

◆ convertToIsoFormat() [2/2]

◆ convertToShortFormat()

◆ convertToTimestampFormat()

◆ getDigest()

◆ getHeaderLen()

◆ getKeyID()

◆ getLeapIndicator()

◆ getMode()

◆ getModeString()

◆ getOriginTimestamp()

◆ getOriginTimestampAsString()

◆ getOriginTimestampInSecs()

◆ getOsiModelLayer()

◆ getPollInterval()

◆ getPollIntervalInSecs()

◆ getPrecision()

◆ getPrecisionInSecs()

◆ getReceiveTimestamp()

◆ getReceiveTimestampAsString()

◆ getReceiveTimestampInSecs()

◆ getReferenceIdentifier()

◆ getReferenceIdentifierString()

◆ getReferenceTimestamp()

◆ getReferenceTimestampAsString()

◆ getReferenceTimestampInSecs()

◆ getRootDelay()

◆ getRootDelayInSecs()

◆ getRootDispersion()

◆ getRootDispersionInSecs()

◆ getStratum()

◆ getTransmitTimestamp()

◆ getTransmitTimestampAsString()

◆ getTransmitTimestampInSecs()

◆ getVersion()

◆ isDataValid()

◆ isNTPPort()

◆ setLeapIndicator()

◆ setMode()

◆ setOriginTimestamp()

◆ setOriginTimestampInSecs()

◆ setPollInterval()

◆ setPrecision()

◆ setReceiveTimestamp()

◆ setReceiveTimestampInSecs()

◆ setReferenceIdentifier() [1/2]

◆ setReferenceIdentifier() [2/2]

◆ setReferenceTimestamp()

◆ setReferenceTimestampInSecs()

◆ setRootDelay()

◆ setRootDelayInSecs()

◆ setRootDispersion()

◆ setRootDispersionInSecs()

◆ setStratum()

◆ setTransmitTimestamp()

◆ setTransmitTimestampInSecs()

◆ setVersion()

◆ toString()