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node.cpython-39.opt-1.pyc
a Mew1 @ s d Z ddlZddlZddlmZmZmZ ddlZddl Zddl Zddl Zddl Zddl ZddlZejjhZejjejjejjhZdd ZejG dd dejZG dd d ZejjG d d d eZ dS ) z)DNS nodes. A node is a set of rdatasets. N)AnyDictOptionalc C s || v p|t jjko|| v S N)dns rdatatypeZRRSIG)Zrdtypesrdtypecovers r ,/usr/lib/python3.9/site-packages/dns/node.py _matches_type_or_its_signature, s r c @ sR e Zd ZdZdZdZdZeej j ej j d dddZ eej j d dd d Zd S ) NodeKindzRdatasets in nodesr )r r returnc C s. t t||rtjS t t||r$tjS tjS d S r )r _cname_typesr CNAME_neutral_typesNEUTRALREGULAR)clsr r r r r classify8 s zNodeKind.classify)rdatasetr c C s | |j|jS r )r r r )r r r r r classify_rdatasetC s zNodeKind.classify_rdatasetN)__name__ __module__ __qualname____doc__r r r classmethodr r RdataTyper r Rdatasetr r r r r r 0 s r c @ s( e Zd ZdZdgZdd Zejje e e f e dddZ dd Z d d Zd d Zdd Zdd Zdd ZejjdfejjejjejjeejjdddZejjdfejjejjejjee ejj dddZ ejjfejjejjejjddd d Z ejjdd d d Z e d!d"d#Z!ed!d$d%Z"dS )&Nodea A Node is a set of rdatasets. A node is either a CNAME node or an "other data" node. A CNAME node contains only CNAME, KEY, NSEC, and NSEC3 rdatasets along with their covering RRSIG rdatasets. An "other data" node contains any rdataset other than a CNAME or RRSIG(CNAME) rdataset. When changes are made to a node, the CNAME or "other data" state is always consistent with the update, i.e. the most recent change wins. For example, if you have a node which contains a CNAME rdataset, and then add an MX rdataset to it, then the CNAME rdataset will be deleted. Likewise if you have a node containing an MX rdataset and add a CNAME rdataset, the MX rdataset will be deleted. rdatasetsc C s g | _ d S r r" selfr r r __init__Z s z Node.__init__)namekwr c K sR t }| jD ]2}t|dkr||j|fi | |d q| dd S )a" Convert a node to text format. Each rdataset at the node is printed. Any keyword arguments to this method are passed on to the rdataset's to_text() method. *name*, a ``dns.name.Name``, the owner name of the rdatasets. Returns a ``str``. r N)ioStringIOr" lenwriteto_textgetvalue)r% r' r( srdsr r r r/ ^ s z Node.to_textc C s dt t| d S )Nz <DNS node >)stridr$ r r r __repr__r s z Node.__repr__c C s< | j D ]}||j vr dS q|j D ]}|| j vr" dS q"dS )NFTr# )r% otherZrdr r r __eq__u s z Node.__eq__c C s | | S r )r8 )r% r7 r r r __ne__ s z Node.__ne__c C s t | jS r )r- r" r$ r r r __len__ s z Node.__len__c C s t | jS r )iterr" r$ r r r __iter__ s z Node.__iter__c C sb t | jdkrRt|}|tjkr6dd | jD | _n |tjkrRdd | jD | _| j| dS )a Append rdataset to the node with special handling for CNAME and other data conditions. Specifically, if the rdataset being appended has ``NodeKind.CNAME``, then all rdatasets other than KEY, NSEC, NSEC3, and their covering RRSIGs are deleted. If the rdataset being appended has ``NodeKind.REGULAR`` then CNAME and RRSIG(CNAME) are deleted. r c S s g | ]}t |t jkr|qS r )r r r .0r2 r r r <listcomp> s z)Node._append_rdataset.<locals>.<listcomp>c S s g | ]}t |t jkr|qS r )r r r r= r r r r? s N)r- r" r r r r appendr% r kindr r r _append_rdataset s zNode._append_rdatasetFrdclassr r creater c C sH | j D ]}||||r| S q|s*ttj|||}| | |S )a* Find an rdataset matching the specified properties in the current node. *rdclass*, a ``dns.rdataclass.RdataClass``, the class of the rdataset. *rdtype*, a ``dns.rdatatype.RdataType``, the type of the rdataset. *covers*, a ``dns.rdatatype.RdataType``, 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. *create*, a ``bool``. If True, create the rdataset if it is not found. Raises ``KeyError`` if an rdataset of the desired type and class does not exist and *create* is not ``True``. Returns a ``dns.rdataset.Rdataset``. )r" matchKeyErrorr r r rC r% rE r r rF r2 r r r find_rdataset s zNode.find_rdatasetc C s0 z| ||||}W n ty* d}Y n0 |S )a Get an rdataset matching the specified properties in the current node. None is returned if an rdataset of the specified type and class does not exist and *create* is not ``True``. *rdclass*, an ``int``, the class of the rdataset. *rdtype*, an ``int``, the type of the rdataset. *covers*, an ``int``, 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. *create*, a ``bool``. If True, create the rdataset if it is not found. Returns a ``dns.rdataset.Rdataset`` or ``None``. N)rJ rH rI r r r get_rdataset s zNode.get_rdatasetNrE r r r c C s& | |||}|dur"| j| dS )aD Delete the rdataset matching the specified properties in the current node. If a matching rdataset does not exist, it is not an error. *rdclass*, an ``int``, the class of the rdataset. *rdtype*, an ``int``, the type of the rdataset. *covers*, an ``int``, the covered type. N)rK r" remove)r% rE r r r2 r r r delete_rdataset s zNode.delete_rdataset replacementr c C sN t |tjjstdt |tjjr,| }| |j |j |j | | dS )a Replace an rdataset. It is not an error if there is no rdataset matching *replacement*. Ownership of the *replacement* object is transferred to the node; in other words, this method does not store a copy of *replacement* at the node, it stores *replacement* itself. *replacement*, a ``dns.rdataset.Rdataset``. Raises ``ValueError`` if *replacement* is not a ``dns.rdataset.Rdataset``. z replacement is not an rdatasetN) isinstancer r r ValueErrorZrrsetZRRsetZ to_rdatasetrN rE r r rC r% rP r r r replace_rdataset s zNode.replace_rdatasetr c C s4 | j D ]&}t|j|j}|tjkr| S qtjS )aT Classify a node. A node which contains a CNAME or RRSIG(CNAME) is a ``NodeKind.CNAME`` node. A node which contains only "neutral" types, i.e. types allowed to co-exist with a CNAME, is a ``NodeKind.NEUTRAL`` node. The neutral types are NSEC, NSEC3, KEY, and their associated RRSIGS. An empty node is also considered neutral. A node which contains some rdataset which is not a CNAME, RRSIG(CNAME), or a neutral type is a a ``NodeKind.REGULAR`` node. Regular nodes are also commonly referred to as "other data". )r" r r r r r rA r r r r $ s z Node.classifyc C s dS )NFr r$ r r r is_immutable9 s zNode.is_immutable)#r r r r __slots__r& r r' Namer r4 r r/ r6 r8 r9 r: r< rC r NONE rdataclass RdataClassr boolr r rJ r rK rN rT r r rV r r r r r! H sL - ) r! c s e Zd Z fddZejjdfejjejj ejj e ej j d fdd Z ejjdfejjejj ejj e eej j d fdd Zejjfejjejj ejj d d d d Zej j d d ddZe dddZ ZS ) ImmutableNodec s$ t tdd |jD | _d S )Nc S s g | ]}t j|qS r )r r ZImmutableRdatasetr= r r r r? B z*ImmutableNode.__init__.<locals>.<listcomp>)superr& tupler" )r% Znode __class__r r r& ? s zImmutableNode.__init__FrD c s |r t dt |||dS N immutableF) TypeErrorr_ rJ r% rE r r rF ra r r rJ E s zImmutableNode.find_rdatasetc s |r t dt |||dS rc )re r_ rK rf ra r r rK P s zImmutableNode.get_rdatasetNrL c C s t dd S Nrd re )r% rE r r r r r rN [ s z ImmutableNode.delete_rdatasetrO c C s t dd S rg rh rS r r r rT c s z ImmutableNode.replace_rdatasetrU c C s dS )NTr r$ r r r rV f s zImmutableNode.is_immutable)r r r r& r r rY rZ r[ r r\ r r rJ r rK rN rT rV __classcell__r r ra r r] = s8 r] ) r enumr+ typingr r r Z dns.immutabler Zdns.nameZdns.rdataclassZ dns.rdatasetZ dns.rdatatypeZ dns.rendererZ dns.rrsetr r r ZNSECZNSEC3ZKEYr r uniqueEnumr r! rd r] r r r r <module> s. v