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stub resolver.
@var default_resolver: The default resolver object
@type default_resolver: dns.resolver.Resolver
objecti����Ntwin32tNXDOMAINcBseZdZRS(sThe query name does
not exist.(t__name__t
__module__t__doc__(((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyR.stYXDOMAINcBseZdZRS(s4The
query name is too long after DNAME
substitution.(RRR(((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyR2stNoAnswercBseZdZRS(s7The
response did not contain an answer to the
question.(RRR(((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyR<st
NoNameserverscBseZdZRS(s<No
non-broken nameservers are available to answer the
query.(RRR(((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyR@stNotAbsolutecBseZdZRS(sSRaised
if an absolute domain name is required but a relative name
was
provided.(RRR(((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyRDst NoRootSOAcBseZdZRS(sYRaised
if for some reason there is no SOA at the root name.
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happen!(RRR(((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyR Ist
NoMetaqueriescBseZdZRS(sMetaqueries
are not
allowed.(RRR(((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyR
NstAnswercBsYeZdZed�Zd�Zd�Zd�Zd�Zd�Z d�Z
d�ZRS( s9DNS stub resolver answer
Instances of this class bundle up the result of a successful DNS
resolution.
For convenience, the answer object implements much of the sequence
protocol, forwarding to its rrset. E.g. "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]".
Note that CNAMEs or DNAMEs in the response may mean that answer
node's name might not be the query name.
@ivar qname: The query name
@type qname: dns.name.Name object
@ivar rdtype: The query type
@type rdtype: int
@ivar rdclass: The query class
@type rdclass: int
@ivar response: The response message
@type response: dns.message.Message object
@ivar rrset: The answer
@type rrset: dns.rrset.RRset object
@ivar expiration: The time when the answer expires
@type expiration: float (seconds since the epoch)
@ivar canonical_name: The canonical name of the query name
@type canonical_name: dns.name.Name object
cCs^||_||_||_||_d}d}x#tdd�D]}yG|j|j|||�}|dks|j|kr�|j}nPWq@t k
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DNS answer cache.
@ivar data: A dictionary of cached data
@type data: dict
@ivar cleaning_interval: The number of seconds between cleanings. The
default is 300 (5 minutes).
@type cleaning_interval: float
@ivar next_cleaning: The time the cache should next be cleaned (in
seconds
since the epoch.)
@type next_cleaning: float
g�r@cCs;i|_||_tj�|j|_tj�|_dS(s�Initialize a DNS
cache.
@param cleaning_interval: the number of seconds between periodic
cleanings. The default is 300.0
@type cleaning_interval: float.
N(tdatatcleaning_intervalR"t
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the cache if it's time to do
so.N(R"R>R<t iteritemsR#tappendR=(R$tnowtkeys_to_deletetktv((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyt_maybe_clean�s
cCskzV|jj�|j�|jj|�}|dksM|jtj�krQdS|SWd|jj�XdS(s)Get
the answer associated with I{key}. Returns None if
no answer is cached for the key.
@param key: the key
@type key: (dns.name.Name, int, int) tuple whose values are the
query name, rdtype, and rdclass.
@rtype: dns.resolver.Answer object or None
N( RAtacquireRHR<tgetRR#R"trelease(R$tkeyRG((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyRJ�s
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key and value in the cache.
@param key: the key
@type key: (dns.name.Name, int, int) tuple whose values are the
query name, rdtype, and rdclass.
@param value: The answer being cached
@type value: dns.resolver.Answer object
N(RARIRHR<RK(R$RLtvalue((s2/usr/lib64/python2.7/site-packages/dns/resolver.pytputs
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the cache.
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the entire cache is flushed.
@param key: the key to flush
@type key: (dns.name.Name, int, int) tuple or None
N( RARIRR<thas_keyR"R=R>RK(R$RL((s2/usr/lib64/python2.7/site-packages/dns/resolver.pytflushs
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tLRUCacheNodecBs2eZdZd�Zd�Zd�Zd�ZRS(sLRUCache
node.
cCs(||_||_||_||_dS(N(RLRMtprevtnext(R$RLRM((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyR+,s cCs.|j|_||_||j_||_dS(N(RRRS(R$tnode((s2/usr/lib64/python2.7/site-packages/dns/resolver.pytlink_before2s cCs.||_|j|_||j_||_dS(N(RRRS(R$RT((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyt
link_after8s cCs"|j|j_|j|j_dS(N(RRRS(R$((s2/usr/lib64/python2.7/site-packages/dns/resolver.pytunlink>s(RRRR+RURVRW(((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyRQ)s
tLRUCachecBsAeZdZdd�Zd�Zd�Zd�Zdd�ZRS(sOBounded
least-recently-used DNS answer cache.
This cache is better than the simple cache (above) if you're
running a web crawler or other process that does a lot of
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.
@ivar data: A dictionary of cached data
@type data: dict
@ivar sentinel: sentinel node for circular doubly linked list of nodes
@type sentinel: LRUCacheNode object
@ivar max_size: The maximum number of nodes
@type max_size: int
i��cCs;i|_|j|�tdd�|_tj�|_dS(s�Initialize
a DNS cache.
@param max_size: The maximum number of nodes to cache; the default
is 100000. Must be > 1.
@type max_size: int
N(R<tset_max_sizeRQRtsentinelR?R@RA(R$tmax_size((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyR+Ss
cCs"|dkrd}n||_dS(Ni(R[(R$R[((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyRY^s cCs�z}|jj�|jj|�}|dkr2dS|j�|jjtj�kre|j|j =dS|j
|j�|jSWd|jj�XdS(s)Get the answer associated with I{key}.
Returns None if
no answer is cached for the key.
@param key: the key
@type key: (dns.name.Name, int, int) tuple whose values are the
query name, rdtype, and rdclass.
@rtype: dns.resolver.Answer object or None
N(
RARIR<RJRRWRMR#R"RLRVRZRK(R$RLRT((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyRJcs
cCs�z�|jj�|jj|�}|dk rH|j�|j|j=nx?t|j�|jkr�|j j
}|j�|j|j=qKWt||�}|j|j �||j|<Wd|jj
�XdS(sAssociate
key and value in the cache.
@param key: the key
@type key: (dns.name.Name, int, int) tuple whose values are the
query name, rdtype, and rdclass.
@param value: The answer being cached
@type value: dns.resolver.Answer object
N(RARIR<RJRRWRLR0R[RZRRRQRVRK(R$RLRMRT((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyRN{s
cCs�z�|jj�|dk rW|jj|�}|dk r�|j�|j|j=q�nL|jj}x4||jkr�|j}d|_ d|_|}qfWi|_Wd|jj
�XdS(s�Flush the cache.
If I{key} is specified, only that item is flushed. Otherwise
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@param key: the key to flush
@type key: (dns.name.Name, int, int) tuple or None
N(RARIRR<RJRWRLRZRSRRRK(R$RLRTRS((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyRP�s
N( RRRR+RYRJRNRRP(((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyRXBs tResolvercBs�eZdZded�Zd�Zd�Zd�Zd�Zd�Z d�Z
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d�Zdejjd�Zd�Zd�ZRS(s)DNS
stub resolver
@ivar domain: The domain of this host
@type domain: dns.name.Name object
@ivar nameservers: A list of nameservers to query. Each nameserver is
a string which contains the IP address of a nameserver.
@type nameservers: list of strings
@ivar search: The search list. If the query name is a relative name,
the resolver will construct an absolute query name by appending the
search
names one by one to the query name.
@type search: list of dns.name.Name objects
@ivar port: The port to which to send queries. The default is 53.
@type port: int
@ivar timeout: The number of seconds to wait for a response from a
server, before timing out.
@type timeout: float
@ivar lifetime: The total number of seconds to spend trying to get an
answer to the question. If the lifetime expires, a Timeout exception
will occur.
@type lifetime: float
@ivar keyring: The TSIG keyring to use. The default is None.
@type keyring: dict
@ivar keyname: The TSIG keyname to use. The default is None.
@type keyname: dns.name.Name object
@ivar keyalgorithm: The TSIG key algorithm to use. The default is
dns.tsig.default_algorithm.
@type keyalgorithm: string
@ivar edns: The EDNS level to use. The default is -1, no Edns.
@type edns: int
@ivar ednsflags: The EDNS flags
@type ednsflags: int
@ivar payload: The EDNS payload size. The default is 0.
@type payload: int
@ivar flags: The message flags to use. The default is None (i.e. not
overwritten)
@type flags: int
@ivar cache: The cache to use. The default is None.
@type cache: dns.resolver.Cache object
@ivar retry_servfail: should we retry a nameserver if it says SERVFAIL?
The default is 'false'.
@type retry_servfail: bool
s/etc/resolv.confcCsI|j�|rEtjdkr,|j�qE|rE|j|�qEndS(sJInitialize
a resolver instance.
@param filename: The filename of a configuration file in
standard /etc/resolv.conf format. This parameter is meaningful
only when I{configure} is true and the platform is POSIX.
@type filename: string or file object
@param configure: If True (the default), the resolver instance
is configured in the normal fashion for the operating system
the resolver is running on. (I.e. a /etc/resolv.conf file on
POSIX systems and from the registry on Windows systems.)
@type configure:
boolRN(tresettsystplatformt
read_registrytread_resolv_conf(R$tfilenamet configure((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyR+�s
cCs�tjjtjjtj��d�|_t|j�dkrRtjj|_ng|_ g|_
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all resolver configuration to the defaults.iii5g@g>@i����N(RR
tNamet from_texttsockettgethostnametdomainR0troottnameserverstsearchtportttimeouttlifetimeRtkeyringtkeynamettsigtdefault_algorithmtkeyalgorithmtednst ednsflagstpayloadtcachetflagstFalsetretry_servfailtrotate(R$((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyR]�s$+ cCs�t|t�st|t�r[yt|d�}Wntk
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d�ndS(
s�Process f as a file in the /etc/resolv.conf format. If f
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is treated as the file itself.trs 127.0.0.1Nit#t;t
nameserveriRhRktoptionsR{(t
isinstancetstrtunicodetopentIOErrorRjR:RyR0tsplitRCRR
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it,(tfind(R$tentryt
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a NameServer registry
entry.N(R�R�R�RjRC(R$RjR�tns_listtns((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyt_config_win32_nameservers7s
cCstjjt|��|_dS(s"Configure
a Domain registry entry.N(RR
ReR�Rh(R$Rh((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyt_config_win32_domainAscCsmt|�}|j|�}|j|�}x<|D]4}||jkr1|jjtjj|��q1q1WdS(s"Configure
a Search registry entry.N(R�R�R�RkRCRR
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SearchListN(t_winregtQueryValueExtWindowsErrorRR�R�R�(R$RLtserverstrtypetdomRk((s2/usr/lib64/python2.7/site-packages/dns/resolver.pyt_config_win32_fromkeyPs<
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r)Pq�Xq�WWd|j �XnWd|j �XdS(s9Extract resolver
configuration from the Windows
registry.s2SYSTEM\CurrentControlSet\Services\Tcpip\Parameterss+SYSTEM\CurrentControlSet\Services\VxD\MSTCPNs=SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfacesii(R�tConnectRegistryRtHKEY_LOCAL_MACHINERytOpenKeyR:tEnvironmentErrorR�tClosetEnumKeyt_win32_is_nic_enabled(R$tlmt want_scant
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r|j5|�d}q�nX|j7�}|tj7j8kr=t8�n|tj7j9ksa|tj7j:krePn|tj7j;ks�|j<r�|j5|�nd}q�W|dk r�Pnt|�dkr�|j)|�}t=||�}|d9}tj>|�q�q�W|j7�tj7j:krqrnt?}
PqrW|
r1t:�nt@|||||�}|jrq|jjA|||f|�n|S( sQuery
nameservers to find the answer to the question.
The I{qname}, I{rdtype}, and I{rdclass} parameters may be objects
of the appropriate type, or strings that can be converted into
objects
of the appropriate type. E.g. For I{rdtype} the integer 2 and the
the string 'NS' both mean to query for records with DNS
rdata type NS.
@param qname: the query name
@type qname: dns.name.Name object or string
@param rdtype: the query type
@type rdtype: int or string
@param rdclass: the query class
@type rdclass: int or string
@param tcp: use TCP to make the query (default is False).
@type tcp: bool
@param source: bind to this IP address (defaults to machine default
IP).
@type source: IP address in dotted quad notation
@param raise_on_no_answer: raise NoAnswer if there's no answer
(defaults is True).
@type raise_on_no_answer: bool
@param source_port: The port from which to send the message.
The default is 0.
@type source_port: int
@rtype: dns.resolver.Answer instance
@raises Timeout: no answers could be found in the specified
lifetime
@raises NXDOMAIN: the query name does not exist
@raises YXDOMAIN: the query name is too long after DNAME
substitution
@raises NoAnswer: the response did not contain an answer and
raise_on_no_answer is True.
@raises NoNameservers: no non-broken nameservers are available to
answer the
question.it algorithmg�������?itsourcetsource_portiN(BR�R�R�RR
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cCsD||_|dkr.|jj�d|_n ||_||_dS(s�Add
a TSIG signature to the query.
@param keyring: The TSIG keyring to use; defaults to None.
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