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dd� Zdd� Z� ZS )�NXDOMAINz"The DNS query name does not exist.�qnames� responsesNc s t � j|i |�� d S �N��super�__init__��self�args�kwargs�� __class__� �0/usr/lib/python3.9/site-packages/dns/resolver.pyr > s zNXDOMAIN.__init__c C s\ t |tttf�std��t|�dkr,td��|d u r:i }nt |t�sLtd��t||d�}|S )Nz#qnames must be a list, tuple or setr z(qnames must contain at least one elementz(responses must be a dict(qname=response)�r r )�
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zNXDOMAIN._check_kwargs��returnc sP d| j vrt� �� S | j d }t|�dkr0d}nd}d�tt|��}d�||�S )Nr � z None of DNS query names existz!The DNS query name does not existz, z{}: {})r r �__str__r" �join�map�str�format)r r �msgr r r r( M s
zNXDOMAIN.__str__c C sp d| j vrtd��| j d D ]D}| j d | }z |�� }||krJ|W S W q ty^ Y q 0 q | j d d S )z%Return the unresolved canonical name.r z parametrized exception requiredr r )r � TypeError�canonical_name� Exception)r �qname�response�cnamer r r r/ X s
zNXDOMAIN.canonical_namec C sx t | j�dg ��}t| j�di ��}|j�di �}|j�dg �D ]*}||vrV|�|� ||v r@|| ||< q@t||d�S )z3Augment by results from another NXDOMAIN exception.r r r )r r �getr# �appendr
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�NoAnswerz<The DNS response does not contain an answer to the question.zDThe DNS response does not contain an answer to the question: {query}r2 c s t � j|i |�� d S r r r r r r r � s zNoAnswer.__init__c s t � j|d jd�S )Nr2 )�query)r rL �question)r r r r r rL � s zNoAnswer._fmt_kwargsc C s
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NoNameserversz�All nameservers failed to answer the query.
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z+All nameservers failed to answer the query.z%s {query}: {errors}NrH �requestrC c s t � j|i |�� d S r r r r r r r � s zNoNameservers.__init__c s( t |d �}t� j|d jd�|�d�S )NrC rS rJ )rP rC )rF r rL rQ r) rM r r r rL � s �zNoNameservers._fmt_kwargsrN r r r r rR � s rR c @ s e Zd ZdZdS )� NotAbsolutezEAn absolute domain name is required but a relative name was provided.NrB r r r r rT � s rT c @ s e Zd ZdZdS )� NoRootSOAzBThere is no SOA RR at the DNS root name. This should never happen!NrB r r r r rU � s rU c @ s e Zd ZdZdS )�
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d� Zdd� ZdS )�Answera& DNS stub resolver answer.
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``for a in answer`` is equivalent to ``for a in answer.rrset``.
``answer[i]`` is equivalent to ``answer.rrset[i]``, and
``answer[i:j]`` is equivalent to ``answer.rrset[i:j]``.
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RRset's name might not be the query name.
N)r1 �rdtype�rdclassr2 �
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d�ZdS )� HostAnswerszTA dict of DNS stub resolver answers to a host name lookup, indexed by
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NT)�v6�v4� add_emptyr& c C sF t � }|d ur$|s|jr$||tjj< |d urB|s6|jrB||tjj< |S r )rz r^ rp rr �AAAA�A)�clsr{ r| r} �answersr r r �makeC s zHostAnswers.make)�familyr& c c s� |t jkr2| �t j�E d H | �t j�E d H d S |t jkrL| �tjj�}n(|t jkrf| �tjj �}nt
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z"HostAnswers.addresses_and_familiesc C s dd� | � |�D �S )Nc s s | ]}|d V qdS )r Nr )�.0Zpairr r r � <genexpr>g � z(HostAnswers.addresses.<locals>.<genexpr>)r� )r r� r r r � addressesf s zHostAnswers.addressesr% c C s | � tjj| � tjj��}|jS r )r4 rp rr r~ r r/ )r r] r r r r/ j s zHostAnswers.canonical_name)NNT)r9 r: r; r< � classmethodr rX �boolr� r� r� rx r r r+ r� r� rp ra rq r/ r r r r rz > s$ ���� rz c @ s@ e Zd ZdZd eedd�dd�Zdd�dd �Zd d�d
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�CacheStatisticszCache Statisticsr N)�hits�missesr& c C s || _ || _d S r �r� r� )r r� r� r r r r r s zCacheStatistics.__init__r% c C s d| _ d| _d S rf r� r8 r r r �resetv s zCacheStatistics.resetc C s t | j| j�S r )r� r� r� r8 r r r �clonez s zCacheStatistics.clone)r r )r9 r: r; r< rx r r� r� r r r r r� o s r� c @ sR e Zd Zdd�dd�Zdd�dd�Zed�dd�Zed�d d
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zCacheBase.__init__c C s4 | j � | j�� W d � n1 s&0 Y dS )z Reset all statistics to zero.N)r� r� r� r8 r r r �reset_statistics� s zCacheBase.reset_statisticsc C s2 | j � | jjW d � S 1 s$0 Y dS )z How many hits has the cache had?N)r� r� r� r8 r r r r� � s zCacheBase.hitsc C s2 | j � | jjW d � S 1 s$0 Y dS )z"How many misses has the cache had?N)r� r� r� r8 r r r r� � s zCacheBase.missesc C s4 | j � | j�� W d � S 1 s&0 Y dS )z�Return a consistent snapshot of all the statistics.
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N)r� r� r� r8 r r r �get_statistics_snapshot� s z!CacheBase.get_statistics_snapshot)
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zCache.__init__r% c C sh t � � }| j|krdg }| j�� D ] \}}|j|kr |�|� q |D ] }| j|= qBt � � }|| j | _dS )z&Clean the cache if it's time to do so.N)r_ r� r� �itemsr` r5 r� )r �nowZkeys_to_delete�k�vr r r � _maybe_clean� s
zCache._maybe_clean��keyr& c C s� | j �n | �� | j�|�}|du s2|jt�� krR| j jd7 _W d � dS | j jd7 _|W d � S 1 sz0 Y dS �aK Get the answer associated with *key*.
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*key*, a ``(dns.name.Name, dns.rdatatype.RdataType, dns.rdataclass.RdataClass)``
tuple whose values are the query name, rdtype, and rdclass respectively.
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Nr' ) r� r� r� r4 r` r_ r� r� r� )r r� r� r r r r4 � s z Cache.get�r� �valuer& c C s< | j �" | �� || j|< W d � n1 s.0 Y dS �a Associate key and value in the cache.
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N)r� r� r� �r r� r� r r r �put� s z Cache.putc C s\ | j �B |dur$|| jv r:| j|= ni | _t�� | j | _W d � n1 sN0 Y dS �a2 Flush the cache.
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N)r� r� r_ r� r� )r r� r r r �flush� s
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�ZdS ) � LRUCacheNodezLRUCache node.c C s" || _ || _d| _| | _| | _d S rf )r� r� r� �prev�nextr� r r r r � s
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link_after� s zLRUCacheNode.link_afterr% c C s | j | j_ | j| j _d S r r� r8 r r r �unlink� s
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� ZS )�LRUCachea` Thread-safe, bounded, least-recently-used DNS answer cache.
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resolutions. The LRUCache has a maximum number of nodes, and when
it is full, the least-recently used node is removed to make space
for a new one.
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z LRUCache.getc C sr | j �X | j�|�}|du s,|jjt�� kr<W d � dS |jW d � S W d � n1 sd0 Y dS )zBReturn the number of cache hits associated with the specified key.Nr )r� r� r4 r� r` r_ r� r� r r r �get_hits_for_key; s
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d�ZdS )� _Resolutiona Helper class for dns.resolver.Resolver.resolve().
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resolver data structures directly.
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z_Resolution.__init__r% c C s� t | j�dk�r�| j�d�| _| jjr�| jj�| j| j| jf�}|durn|j du rf| j
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*rdtype*, an ``int`` or ``str``, the query type.
*rdclass*, an ``int`` or ``str``, the query class.
*tcp*, a ``bool``. If ``True``, use TCP to make the query.
*source*, a ``str`` or ``None``. If not ``None``, bind to this IP
address when making queries.
*raise_on_no_answer*, a ``bool``. If ``True``, raise
``dns.resolver.NoAnswer`` if there's no answer to the question.
*source_port*, an ``int``, the port from which to send the message.
*lifetime*, a ``float``, how many seconds a query should run
before timing out.
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may be added to relative names. The default is ``None``,
which causes the value of the resolver's
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in the specified lifetime.
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DNAME substitution.
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``True`` and the query name exists but has no RRset of the
desired type and class.
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function.
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``dns.resolver.NXDOMAIN``.
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is 5 seconds.
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then the resolver's nameservers are set to the returned servers in priority
order.
The current implementation does not use any address hints from the SVCB record,
nor does it resolve addresses for the SCVB target name, rather it assumes that
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*resolver*, a ``dns.resolver.Resolver`` or ``None``, the resolver to use.
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*lifetime*, a ``float``, the total time to allow for the queries needed
to determine the zone. If ``None``, the default, then only the individual
query limits of the resolver apply.
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root. (This is only likely to happen if you're using non-default
root servers in your network and they are misconfigured.)
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parameters, and ``dns.resolver.make_resolver_at`` for information about the resolver
parameters *where*, *port*, *family*, and *resolver*.
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