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__init__.cpython-310.pyc
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_asyncbackend.cpython-310.pyc
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_asyncio_backend.cpython-310.p...
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_curio_backend.cpython-310.pyc
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_immutable_attr.cpython-310.py...
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_immutable_ctx.cpython-310.pyc
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_trio_backend.cpython-310.pyc
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asyncbackend.cpython-310.pyc
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asyncquery.cpython-310.pyc
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asyncresolver.cpython-310.pyc
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dnssec.cpython-310.pyc
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e164.cpython-310.pyc
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edns.cpython-310.pyc
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entropy.cpython-310.pyc
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enum.cpython-310.pyc
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exception.cpython-310.pyc
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flags.cpython-310.pyc
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grange.cpython-310.pyc
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immutable.cpython-310.pyc
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inet.cpython-310.pyc
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ipv4.cpython-310.pyc
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ipv6.cpython-310.pyc
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message.cpython-310.pyc
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name.cpython-310.pyc
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namedict.cpython-310.pyc
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node.cpython-310.pyc
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opcode.cpython-310.pyc
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query.cpython-310.pyc
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rcode.cpython-310.pyc
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rdata.cpython-310.pyc
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rdataclass.cpython-310.pyc
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rdataset.cpython-310.pyc
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rdatatype.cpython-310.pyc
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renderer.cpython-310.pyc
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resolver.cpython-310.pyc
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reversename.cpython-310.pyc
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rrset.cpython-310.pyc
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serial.cpython-310.pyc
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set.cpython-310.pyc
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tokenizer.cpython-310.pyc
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transaction.cpython-310.pyc
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tsig.cpython-310.pyc
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tsigkeyring.cpython-310.pyc
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ttl.cpython-310.pyc
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update.cpython-310.pyc
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version.cpython-310.pyc
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versioned.cpython-310.pyc
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wire.cpython-310.pyc
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xfr.cpython-310.pyc
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zone.cpython-310.pyc
31.1
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zonefile.cpython-310.pyc
6.86
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Code Editor : edns.cpython-310.pyc
o x7�_�* � @ s� d Z ddlZddlZddlZddlZddlZddlZG dd� dejj �Z G dd� d�Z G dd� de �Z G d d � d e �Z e je iZd d � Zd d� Zdd� Zdd� Ze jZe jZe jZe jZe jZe jZe jZe jZe jZe j Z dS )z EDNS Options� Nc @ s@ e Zd ZdZdZdZdZdZdZdZ dZ d Z d Z e d d � �Zd S )� OptionType� � � � � � � � � � c C s dS )Ni�� � )�clsr r �*/usr/lib/python3/dist-packages/dns/edns.py�_maximum3 s zOptionType._maximumN)�__name__� __module__� __qualname__�NSID�DAU�DHU�N3U�ECS�EXPIRE�COOKIE� KEEPALIVE�PADDING�CHAIN� classmethodr r r r r r s r c @ sn e Zd ZdZdd� Zddd�Zedd� �Zd d � Zd d � Z d d� Z dd� Z dd� Z dd� Z dd� Zdd� ZdS )�Optionz%Base class for all EDNS option types.c C s t �|�| _dS )zPInitialize an option. *otype*, an ``int``, is the option type. N)r �make�otype)�selfr! r r r �__init__< s zOption.__init__Nc C � t �)zUConvert an option to wire format. Returns a ``bytes`` or ``None``. ��NotImplementedError�r" �filer r r �to_wireC s zOption.to_wirec C r$ )z�Build an EDNS option object from wire format. *otype*, an ``int``, is the option type. *parser*, a ``dns.wire.Parser``, the parser, which should be restructed to the option length. Returns a ``dns.edns.Option``. r% �r r! �parserr r r �from_wire_parserK s zOption.from_wire_parserc C s, | � � }|� � }||krdS ||krdS dS )z�Compare an EDNS option with another option of the same type. Returns < 0 if < *other*, 0 if == *other*, and > 0 if > *other*. r � ���)r) )r" �other�wire�owirer r r �_cmpX s z Option._cmpc C s, t |t�sdS | j|jkrdS | �|�dkS )NFr �� isinstancer r! r2 �r" r/ r r r �__eq__e � z Option.__eq__c C s, t |t�sdS | j|jkrdS | �|�dkS )NTr r3 r5 r r r �__ne__l r7 z Option.__ne__c C s( t |t�r | j|jkr tS | �|�dk S �Nr �r4 r r! �NotImplementedr2 r5 r r r �__lt__s � z Option.__lt__c C s( t |t�r | j|jkr tS | �|�dkS r9 r: r5 r r r �__le__y r= z Option.__le__c C s( t |t�r | j|jkr tS | �|�dkS r9 r: r5 r r r �__ge__ r= z Option.__ge__c C s( t |t�r | j|jkr tS | �|�dkS r9 r: r5 r r r �__gt__� r= z Option.__gt__c C s | � � S �N)�to_text�r" r r r �__str__� s zOption.__str__rA )r r r �__doc__r# r) r r, r2 r6 r8 r< r> r? r@ rD r r r r r 8 s r c s> e Zd ZdZ� fdd�Zd dd�Zdd� Zed d � �Z� Z S ) � GenericOptionzwGeneric Option Class This class is used for EDNS option types for which we have no better implementation. c s" t � �|� tjj�|d�| _d S )NT)�superr# �dns�rdata�Rdata� _as_bytes�data)r" r! rL �� __class__r r r# � s zGenericOption.__init__Nc C s |r |� | j� d S | jS rA )�writerL r' r r r r) � s zGenericOption.to_wirec C s d| j S )Nz Generic %d)r! rC r r r rB � s zGenericOption.to_textc C s | ||� � �S rA )� get_remainingr* r r r r, � s z GenericOption.from_wire_parserrA ) r r r rE r# r) rB r r, � __classcell__r r rM r rF � s rF c sL e Zd ZdZd� fdd� Zdd� Zedd � �Zdd d �Ze d d � �Z � Z S )� ECSOptionz!EDNS Client Subnet (ECS, RFC7871)Nr c sT t � �tj� tj�|�}|tjkr5d| _ |du rd}tj j � |�}tj j � |dd�}tj j � |dd�}n,|tjkr]d| _ |du rCd}tj j �|�}tj j � |dd�}tj j � |dd�}ntd ��|| _|| _|| _tj�||�}tt�|d ��}|d|� | _|d }|dkr�t�d t| jd d� �dd | > @ �}| jdd � | | _dS dS )a� *address*, a ``str``, is the client address information. *srclen*, an ``int``, the source prefix length, which is the leftmost number of bits of the address to be used for the lookup. The default is 24 for IPv4 and 56 for IPv6. *scopelen*, an ``int``, the scope prefix length. This value must be 0 in queries, and should be set in responses. � N�8 r � r- � � zBad address family� @r �Br. � ) rG r# r r rH �inet�af_for_address�socket�AF_INET6�familyrI rJ �_as_ipv6_address�_as_int�AF_INET�_as_ipv4_address� ValueError�address�srclen�scopelen� inet_pton�int�math�ceil�addrdata�struct�pack�ord) r" re rf rg �afrl �nbytes�nbits�lastrM r r r# � s< ��zECSOption.__init__c C s d� | j| j| j�S )NzECS {}/{} scope/{})�formatre rf rg rC r r r rB � s �zECSOption.to_textc C s d}| � � }d}t|�dkr|d }n t|�dkr+|d |kr&td�| ���|d }ntd�| ���|�d�}|dkrE|� d�\}}d}n|dkrR|� d�\}}}ntd�| ���zt|�}W n tyo tdd �|� ��w zt|�}W n ty� td d �|� ��w t|||�S ) a� Convert a string into a `dns.edns.ECSOption` *text*, a `str`, the text form of the option. Returns a `dns.edns.ECSOption`. Examples: >>> import dns.edns >>> >>> # basic example >>> dns.edns.ECSOption.from_text('1.2.3.4/24') >>> >>> # also understands scope >>> dns.edns.ECSOption.from_text('1.2.3.4/24/32') >>> >>> # IPv6 >>> dns.edns.ECSOption.from_text('2001:4b98::1/64/64') >>> >>> # it understands results from `dns.edns.ECSOption.to_text()` >>> dns.edns.ECSOption.from_text('ECS 1.2.3.4/24/32') r Nr- r rS z could not parse ECS from "{}"�/zinvalid scope z "{}": scope must be an integerzinvalid srclen z "{}": srclen must be an integer)�split�lenrd rt �countri rR )�text�optional_prefix�tokens�ecs_text� n_slashesre rf �scoper r r � from_text� s@ �� �� zECSOption.from_textc C s2 t �d| j| j| j�| j }|r|�|� d S |S )N�!HBB)rm rn r_ rf rg rl rO )r" r( �valuer r r r) s �zECSOption.to_wirec C s� |� d�\}}}tt�|d ��}|�|�}|dkr)d| }tj�|d| �} n|dkr<d| }tj�|d| �} nt d��| | ||�S ) Nr� rX r- � � rS � zunsupported family) � get_structri rj rk � get_bytesrH �ipv4� inet_ntoa�ipv6rd ) r r! r+ r_ �srcr~ �addrlen�prefix�pad�addrr r r r, s zECSOption.from_wire_parserr9 rA ) r r r rE r# rB � staticmethodr r) r r, rQ r r rM r rR � s / 6rR c C s t �| �}|du r t}|S )z�Return the class for the specified option type. The GenericOption class is used if a more specific class is not known. N)�_type_to_class�getrF )r! r r r r �get_option_class3 s r� c C s t | �}t�| �} |�| |�S )a Build an EDNS option object from wire format. *otype*, an ``int``, is the option type. *parser*, a ``dns.wire.Parser``, the parser, which should be restricted to the option length. Returns an instance of a subclass of ``dns.edns.Option``. )r� r r r, )r! r+ r r r r �option_from_wire_parser@ s r� c C sF t j�||�}|�|�� t| |�W d � S 1 s w Y dS )ar Build an EDNS option object from wire format. *otype*, an ``int``, is the option type. *wire*, a ``bytes``, is the wire-format message. *current*, an ``int``, is the offset in *wire* of the beginning of the rdata. *olen*, an ``int``, is the length of the wire-format option data Returns an instance of a subclass of ``dns.edns.Option``. N)rH r0 �Parser� restrict_tor� )r! r0 �current�olenr+ r r r �option_from_wireO s $�r� c C s | t |< dS )z�Register the implementation of an option type. *implementation*, a ``class``, is a subclass of ``dns.edns.Option``. *otype*, an ``int``, is the option type. N)r� )�implementationr! r r r � register_typea s r� ) rE rj r] rm �dns.enumrH �dns.inet� dns.rdata�enum�IntEnumr r rF rR r r� r� r� r� r� r r r r r r r r r r r r r �<module> s8 W �
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