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rdataset.cpython-36.pyc
3 �b�W$- � @ s� d Z ddlZddlmZ ddlZddlZddlZddlZddl Zddl Zddl m Z ej jZG dd� dejj�ZG dd � d ejj�ZG d d � d ej j�Zd d � Zdd� Zdd� Zdd� ZdS )zHDNS rdatasets (an rdataset is a set of rdatas of a given type and class)� N)�StringIO� )� string_typesc @ s e Zd ZdZdS )�DifferingCoversz~An attempt was made to add a DNS SIG/RRSIG whose covered type is not the same as that of the other rdatas in the rdataset.N)�__name__� __module__� __qualname__�__doc__� r r � /usr/lib/python3.6/rdataset.pyr ! s r c @ s e Zd ZdZdS )�IncompatibleTypesz?An attempt was made to add DNS RR data of an incompatible type.N)r r r r r r r r r ' s r c s� e Zd ZdZddddgZejjf� fdd� Z� fdd �Z d d � Z d$� fd d� Z � fdd�Z � fdd�Z � fdd�Zdd� Zdd� Z� fdd�Zdd � Zd%d d �Zd&d d!�Zd"d#� Z� ZS )'�Rdataseta� A DNS rdataset. @ivar rdclass: The class of the rdataset @type rdclass: int @ivar rdtype: The type of the rdataset @type rdtype: int @ivar covers: The covered type. Usually this value is dns.rdatatype.NONE, but if the rdtype is dns.rdatatype.SIG or dns.rdatatype.RRSIG, then the covers value will be the rdata type the SIG/RRSIG covers. The library treats the SIG and RRSIG types as if they were a family of types, e.g. RRSIG(A), RRSIG(NS), RRSIG(SOA). This makes RRSIGs much easier to work with than if RRSIGs covering different rdata types were aggregated into a single RRSIG rdataset. @type covers: int @ivar ttl: The DNS TTL (Time To Live) value @type ttl: int �rdclass�rdtype�covers�ttlc s* t t| �j� || _|| _|| _d| _dS )z�Create a new rdataset of the specified class and type. @see: the description of the class instance variables for the meaning of I{rdclass} and I{rdtype}r N)�superr �__init__r r r r )�selfr r r )� __class__r r r C s zRdataset.__init__c s2 t t| �j� }| j|_| j|_| j|_| j|_|S )N)r r �_cloner r r r )r �obj)r r r r O s zRdataset._clonec C s( t | �dkr|| _n|| jk r$|| _dS )z�Set the TTL of the rdataset to be the lesser of the set's current TTL or the specified TTL. If the set contains no rdatas, set the TTL to the specified TTL. @param ttl: The TTL @type ttl: intr N)�lenr )r r r r r � update_ttlW s zRdataset.update_ttlNc s� | j |j ks| j|jkr t�|dk r.| j|� | jtjjksJ| jtjjkr�|j� }t | �dkrt| jtjj krt|| _n| j|kr�t �tjj |j�r�t | �dkr�| j � tt| �j|� dS )a% Add the specified rdata to the rdataset. If the optional I{ttl} parameter is supplied, then self.update_ttl(ttl) will be called prior to adding the rdata. @param rd: The rdata @type rd: dns.rdata.Rdata object @param ttl: The TTL @type ttl: intNr )r r r r �dns� rdatatypeZRRSIGZSIGr r �NONEr Z is_singleton�clearr r �add)r �rdr r )r r r r c s z Rdataset.addc s | j |j� tt| �j|� d S )N)r r r r � union_update)r �other)r r r r � s zRdataset.union_updatec s | j |j� tt| �j|� d S )N)r r r r �intersection_update)r r! )r r r r" � s z Rdataset.intersection_updatec s | j |j� tt| �j|� dS )z�Add all rdatas in other to self. @param other: The rdataset from which to update @type other: dns.rdataset.Rdataset objectN)r r r r �update)r r! )r r r r# � s zRdataset.updatec C sR | j dkrd}ndtjj| j � d }dtjj| j� d tjj| j� | d S )Nr � �(�)z<DNS � z rdataset>)r r r �to_text� rdataclassr r )r Zctextr r r �__repr__� s zRdataset.__repr__c C s | j � S )N)r( )r r r r �__str__� s zRdataset.__str__c sF t |t�sdS | j|jks2| j|jks2| j|jkr6dS tt| �j|�S )zTwo rdatasets are equal if they have the same class, type, and covers, and contain the same rdata. @rtype: boolF)� isinstancer r r r r �__eq__)r r! )r r r r- � s zRdataset.__eq__c C s | j |� S )N)r- )r r! r r r �__ne__� s zRdataset.__ne__Tc K s� |dk r"|j ||�}t|�}d}nd}d}t� }|dk r>|} n| j} t| �dkrz|jd||tjj| �tj j| j �f � nNxL| D ]D} |jd||| j tjj| �tj j| j �| jf ||d�|��f � q�W |j � dd � S ) a� Convert the rdataset into DNS master file format. @see: L{dns.name.Name.choose_relativity} for more information on how I{origin} and I{relativize} determine the way names are emitted. Any additional keyword arguments are passed on to the rdata to_text() method. @param name: If name is not None, emit a RRs with I{name} as the owner name. @type name: dns.name.Name object @param origin: The origin for relative names, or None. @type origin: dns.name.Name object @param relativize: True if names should names be relativized @type relativize: boolNr' r$ r z %s%s%s %s z%s%s%d %s %s %s )�origin� relativizer ���) Zchoose_relativity�strr r r �writer r) r( r r r �getvalue) r �namer/ r0 �override_rdclass�kwZntextZpad�sr r r r r r( � s* zRdataset.to_textc C s& |dk r|}d}n| j }|jdd� t| �dkr`|j|||� tjd| j|dd�}|j|� dS |rxt| �} t j | � n| } x�| D ]�} |j|||� tjd| j|| j d�}|j|� |j � } | j|||� |j � } | | dk s�t �|j| d � tjd| | �}|j|� |jdd� q�W t| �S dS ) a, Convert the rdataset to wire format. @param name: The owner name of the RRset that will be emitted @type name: dns.name.Name object @param file: The file to which the wire format data will be appended @type file: file @param compress: The compression table to use; the default is None. @type compress: dict @param origin: The origin to be appended to any relative names when they are emitted. The default is None. @returns: the number of records emitted @rtype: int NFr � z!HHIHr i z!H)r �seekr �to_wire�struct�packr r3 �list�randomZshuffler �tell�AssertionError) r r5 �file�compressr/ r6 Z want_shuffler Zstuff�lr �start�endr r r r; � s8 zRdataset.to_wirec C s& | j |kr"| j|kr"| j|kr"dS dS )zSReturns True if this rdataset matches the specified class, type, and coversTF)r r r )r r r r r r r �match s zRdataset.match)N)NNTN)NNNT)r r r r � __slots__r r r r r r r r r" r# r* r+ r- r. r( r; rG � __classcell__r r )r r r , s$ 2 /r c C sp t | t�rtjj| �} t |t�r,tjj|�}t| |�}|j|� x*|D ]"}tjj|j |j |�}|j |� qFW |S )z�Create an rdataset with the specified class, type, and TTL, and with the specified list of rdatas in text format. @rtype: dns.rdataset.Rdataset object ) r, r r r) � from_textr r r Zrdatar r r )r r r � text_rdatas�r�tr r r r �from_text_list s rN c G s t | |||�S )z�Create an rdataset with the specified class, type, and TTL, and with the specified rdatas in text format. @rtype: dns.rdataset.Rdataset object )rN )r r r rK r r r rJ / s rJ c C sT t |�dkrtd��d}x6|D ].}|dkrBt|j|j�}|j| � |j|� q W |S )z�Create an rdataset with the specified TTL, and with the specified list of rdata objects. @rtype: dns.rdataset.Rdataset object r z rdata list must not be emptyN)r � ValueErrorr r r r r )r �rdatasrL r r r r �from_rdata_list9 s rQ c G s t | |�S )z�Create an rdataset with the specified TTL, and with the specified rdata objects. @rtype: dns.rdataset.Rdataset object )rQ )r rP r r r � from_rdataK s rR )r r? �ior r< Z dns.exceptionr Z dns.rdatatypeZdns.rdataclassZ dns.rdataZdns.setZ_compatr �set�SetZ SimpleSetZ exceptionZ DNSExceptionr r r rN rJ rQ rR r r r r �<module> s$ q
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