View file File name : ntplib.cpython-36.opt-1.pyc Content :3 ���U(6 � @ s� d Z ddlZddlZddlZddlZG dd� de�ZG dd� d�ZG dd� d�ZG d d � d e�Z G d d � d �Z d d� Z d!dd�Z d"dd�Z dd� Zdd� Zdd� Zdd� Zd d � Zd#d d �ZdS )$zePython NTP library. Implementation of client-side NTP (RFC-1305), and useful NTP-related functions. � Nc @ s e Zd ZdZdS )� NTPExceptionz Exception raised by this module.N)�__name__� __module__� __qualname__�__doc__� r r � /usr/lib/python3.6/ntplib.pyr % s r c ! @ s� e Zd ZdZejejd�dd� � Zejddd�Z ee j d d Z dd d d d d dddddddddddddddd d d d d d!d"d#d$d%d&d'� Z d(d)d*�Z d+d,d-d.d/d0d1d2d3�Zd4d5d6d7d8�Zd9S ):�NTPz Helper class defining constants.r � il � � i z)Geostationary Orbit Environment SatellitezGlobal Position SystemzGalileo Positioning SystemzGeneric pulse-per-secondz!Inter-Range Instrumentation Groupz$LF Radio WWVB Ft. Collins, CO 60 kHzz'LF Radio DCF77 Mainflingen, DE 77.5 kHzz LF Radio HBG Prangins, HB 75 kHzz LF Radio MSF Anthorn, UK 60 kHzz2LF Radio JJY Fukushima, JP 40 kHz, Saga, JP 60 kHzz!MF Radio LORAN C station, 100 kHzz MF Radio Allouis, FR 162 kHzz HF Radio CHU Ottawa, Ontarioz HF Radio WWV Ft. Collins, COzHF Radio WWVH Kauai, HIzNIST telephone modemzUSNO telephone modemzEuropean telephone modemzuncalibrated local clockzcalibrated Cesium clockzcalibrated Rubidium clockz OMEGA radionavigation systemzDCN routing protocolzTSP time protocolzDigital Time ServicezAtomic clock (calibrated)zVLF radio (OMEGA,, etc.)zExternal 1 PPS inputz(Internal clock)z(Initialization)ZNULL) ZGOESzGPS zGAL zPPS ZIRIGZWWVBzDCF zHBG zMSF zJJY ZLORCzTDF zCHU zWWV ZWWVHZNISTZACTSZUSNOzPTB ZLOCLZCESMZRBDMZOMEGzDCN zTSP zDTS ZATOMzVLF Z1PPSZFREEZINITz zunspecified or invalidzprimary reference (%s))r r Zreservedzsymmetric activezsymmetric passiveZclientZserverZ broadcastz!reserved for NTP control messageszreserved for private use)r r � r � � � � z no warningz%last minute of the day has 61 secondsz%last minute of the day has 59 secondsz unknown (clock unsynchronized))r r r r N)r r r r �datetimeZdate�timeZgmtimeZ _SYSTEM_EPOCHZ _NTP_EPOCHZdays� NTP_DELTA� REF_ID_TABLE� STRATUM_TABLE� MODE_TABLE� LEAP_TABLEr r r r r * sf r c @ s. e Zd ZdZdZd dd�Zdd � Zd d � Zd S )� NTPPacketz:NTP packet class. This represents an NTP packet. z !B B B b 11Ir r r c C sR d| _ || _|| _d| _d| _d| _d| _d| _d| _d| _ d| _ d| _ || _ dS )z�Constructor. Parameters: version -- NTP version mode -- packet mode (client, server) tx_timestamp -- packet transmit timestamp r N) �leap�version�mode�stratum�poll� precision� root_delay�root_dispersion�ref_id� ref_timestamp�orig_timestamp�recv_timestamp� tx_timestamp)�selfr r r& r r r �__init__| s zNTPPacket.__init__c C s� y�t jtj| jd> | jd> B | jB | j| j| j t | j �d> t | j d�B t | j �d> t | j d�B | jt | j�t | j�t | j�t | j�t | j�t | j�t | j�t | j��}W n t jk r� td��Y nX |S )z�Convert this NTPPacket to a buffer that can be sent over a socket. Returns: buffer representing this packet Raises: NTPException -- in case of invalid field r r � zInvalid NTP packet fields.)�struct�packr �_PACKET_FORMATr r r r r r �_to_intr �_to_fracr! r" r# r$ r% r& �errorr )r' Zpackedr r r �to_data� s* zNTPPacket.to_datac C s y"t jtj|dt jtj�� �}W n t jk r@ td��Y nX |d d? d@ | _|d d? d@ | _|d d@ | _ |d | _ |d | _ |d | _ t |d �d | _t |d �d | _|d | _t|d |d �| _t|d |d �| _t|d |d �| _t|d |d �| _dS )z�Populate this instance from a NTP packet payload received from the network. Parameters: data -- buffer payload Raises: NTPException -- in case of invalid packet format r zInvalid NTP packet.r r r r r r r) r � � � � � � � Ni i )r* �unpackr r, �calcsizer/ r r r r r r r �floatr r! r" �_to_timer# r$ r% r& )r' �dataZunpackedr r r � from_data� s$ zNTPPacket.from_dataN)r r r )r r r r r, r( r0 r= r r r r r s s # r c @ sl e Zd ZdZdd� Zedd� �Zedd� �Zedd � �Zed d � �Z ed d � �Z edd� �Z edd� �Z dS )�NTPStatsz�NTP statistics. Wrapper for NTPPacket, offering additional statistics like offset and delay, and timestamps converted to system time. c C s t j| � d| _dS )z Constructor.r N)r r( �dest_timestamp)r' r r r r( � s zNTPStats.__init__c C s | j | j | j| j d S )�offsetr )r% r$ r& r? )r' r r r r@ � s zNTPStats.offsetc C s | j | j | j| j S )zround-trip delay)r? r$ r& r% )r' r r r �delay� s zNTPStats.delayc C s t | j�S )z"Transmit timestamp in system time.)�ntp_to_system_timer& )r' r r r �tx_time� s zNTPStats.tx_timec C s t | j�S )z!Receive timestamp in system time.)rB r% )r' r r r � recv_time� s zNTPStats.recv_timec C s t | j�S )z#Originate timestamp in system time.)rB r$ )r' r r r � orig_time s zNTPStats.orig_timec C s t | j�S )z#Reference timestamp in system time.)rB r# )r' r r r �ref_time s zNTPStats.ref_timec C s t | j�S )z%Destination timestamp in system time.)rB r? )r' r r r � dest_time s zNTPStats.dest_timeN) r r r r r( �propertyr@ rA rC rD rE rF rG r r r r r> � s r> c @ s" e Zd ZdZdd� Zd dd�Zd S ) � NTPClientzNTP client session.c C s dS )z Constructor.Nr )r' r r r r( s zNTPClient.__init__r �ntpr c C s� t j||�d }|d |d }}t j |t j�}z�yh|j|� td|ttj� �d�} |j| j� |� d} x"| d |d kr�|j d�\} } qjW ttj� �} W n" t j k r� t d| ��Y nX W d|j � X t � } | j| � | | _| S ) z�Query a NTP server. Parameters: host -- server name/address version -- NTP version to use port -- server port timeout -- timeout on socket operations Returns: NTPStats object r r r )r r r& N� z No response received from %s.)N)�socketZ getaddrinfoZ SOCK_DGRAMZ settimeoutr �system_to_ntp_timer Zsendtor0 Zrecvfrom�timeoutr �closer> r= r? )r' �hostr ZportrN ZaddrinfoZfamilyZsockaddr�sZ query_packetZsrc_addrZresponse_packetr? Zstatsr r r �request s& zNTPClient.requestN)r rJ r )r r r r r( rR r r r r rI s rI c C s t | �S )z|Return the integral part of a timestamp. Parameters: timestamp -- NTP timestamp Retuns: integral part )�int)� timestampr r r r- H s r- � c C s t t| t| � �d| �S )z�Return the fractional part of a timestamp. Parameters: timestamp -- NTP timestamp n -- number of bits of the fractional part Retuns: fractional part r )rS �absr- )rT �nr r r r. T s r. c C s | t |�d| S )z�Return a timestamp from an integral and fractional part. Parameters: integ -- integral part frac -- fractional part n -- number of bits of the fractional part Retuns: timestamp r )r: )ZintegZfracrW r r r r; a s r; c C s | t j S )z�Convert a NTP time to system time. Parameters: timestamp -- timestamp in NTP time Returns: corresponding system time )r r )rT r r r rB o s rB c C s | t j S )z�Convert a system time to a NTP time. Parameters: timestamp -- timestamp in system time Returns: corresponding NTP time )r r )rT r r r rM { s rM c C s | t jkrt j| S td��dS )z�Convert a leap indicator to text. Parameters: leap -- leap indicator value Returns: corresponding message Raises: NTPException -- in case of invalid leap indicator zInvalid leap indicator.N)r r r )r r r r � leap_to_text� s rX c C s | t jkrt j| S td��dS )z�Convert a NTP mode value to text. Parameters: mode -- NTP mode Returns: corresponding message Raises: NTPException -- in case of invalid mode z Invalid mode.N)r r r )r r r r � mode_to_text� s rY c C sT | t jkrt j| | S d| k o*dk n r8d| S | dkrHd| S td��dS )z�Convert a stratum value to text. Parameters: stratum -- NTP stratum Returns: corresponding message Raises: NTPException -- in case of invalid stratum r r) zsecondary reference (%s)zunsynchronized (%s)z Invalid stratum or reserved.N)r r r )r r r r �stratum_to_text� s rZ r c C s� | d? d@ | d? d@ | d? d@ | d@ f}d| ko:dkn rfd| }|t jkr\t j| S d| S n(d | koxdk n r�d | S td ��d S ) a Convert a reference clock identifier to text according to its stratum. Parameters: ref_id -- reference clock indentifier stratum -- NTP stratum Returns: corresponding message Raises: NTPException -- in case of invalid stratum r � r) r1 r r z%c%c%c%cz"Unidentified reference source '%s'r z %d.%d.%d.%dzInvalid stratum.N)r r r )r" r Zfields�textr r r �ref_id_to_text� s r] )rU )rU )r )r r rL r* r � Exceptionr r r r> rI r- r. r; rB rM rX rY rZ r] r r r r �<module> s$ Ij38