File: //proc/3/root/proc/2/task/2/root/usr/lib/python2.4/site-packages/dns/resolver.pyc
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@var default_resolver: The default resolver object
@type default_resolver: dns.resolver.Resolver objectNt win32t NXDOMAINc B s t Z d Z RS( s The query name does not exist.( t __name__t
__module__t __doc__( ( ( t0 /usr/lib/python2.4/site-packages/dns/resolver.pyR - s t YXDOMAINc B s t Z d Z RS( s4 The query name is too long after DNAME substitution.( R R R ( ( ( R R 1 s t NoAnswerc B s t Z d Z RS( s7 The response did not contain an answer to the question.( R R R ( ( ( R R ; s t
NoNameserversc B s t Z d Z RS( s< No non-broken nameservers are available to answer the query.( R R R ( ( ( R R ? s t NotAbsolutec B s t Z d Z RS( sS Raised if an absolute domain name is required but a relative name
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d Z RS( s9 DNS 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
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@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
f300.0c C s; h | _ | | _ t i | i | _ t i | _ d S( 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( R t datat cleaning_intervalR* t
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j o d Sn | SWd | i i Xd S( 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( R RB t acquireRI R= t gett keyRG R R+ R* t release( R RL RG ( ( R RK s
# c C s= z( | i i | i | | i | <Wd | i i Xd S( s Associate 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
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c C sw zb | i i | d j o% | i i | o | i | =qa n h | _ t i | i | _ Wd | i i
Xd S( s Flush the cache.
If I{key} is specified, only that item is flushed. Otherwise
the entire cache is flushed.
@param key: the key to flush
@type key: (dns.name.Name, int, int) tuple or None
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t LRUCacheNodec B s2 t Z d Z d Z d Z d Z d Z RS( s LRUCache node.
c C s( | | _ | | _ | | _ | | _ d S( N( RL R RN t prevt next( R RL RN ( ( R R, + s c C s. | i | _ | | _ | | i _ | | _ d S( N( t nodeRS R RT ( R RU ( ( R t link_before1 s c C s. | | _ | i | _ | | i _ | | _ d S( N( RU R RS RT ( R RU ( ( R t
link_after7 s c C s" | i | i _ | i | i _ d S( N( R RS RT ( R ( ( R t unlink= s ( R R R R, RV RW RX ( ( ( R RR ( s
t LRUCachec B sA t Z d Z d d Z d Z d Z d Z e d Z RS( sO Bounded 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 c C s; h | _ | i | t d d | _ t i | _ d S( 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
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| i SWd | i i Xd S( 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
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@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( R RB RJ R= RK RL RU R RX R1 R[ R\ RS RR RN RW RM ( R RL RN RU ( ( R RO z s"
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| } qj Wh | _ Wd | i i Xd S( s Flush the cache.
If I{key} is specified, only that item is flushed. Otherwise
the entire cache is flushed.
@param key: the key to flush
@type key: (dns.name.Name, int, int) tuple or None
N(
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( R R R R, RZ RK RO R RQ ( ( ( R RY A s t Resolverc B s t Z d Z d e d Z d Z d Z d Z d Z d Z d Z
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d Z e e i i d Z d Z d Z RS( 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.confc C sO | i | o: t i d j o | i qK | o | i | qK n d S( sJ Initialize 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: boolR N( R t resett configuret syst platformt
read_registryt filenamet read_resolv_conf( R Rc R_ ( ( R R, s
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j o5 x2 | d D]" } | i i t i i | qNWqs qs WWd | o | i n Xt | i d j o | i i d n d S( s Process f as a file in the /etc/resolv.conf format. If f is
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c C sc t | } | i | } | i | } x2 | D]* } | | i j o | i i | q1 q1 Wd S( s& Configure a NameServer registry entry.N( R Rk R R R R t ns_listt nsRH ( R Rk R R R ( ( R t _config_win32_nameservers2 s c C s t i i t | | _ d S( s" Configure a Domain registry entry.N( R R( Rf R Ri R ( R Ri ( ( R t _config_win32_domain< s c C so t | } | i | } | i | } x> | D]6 } | | i j o | i i t i
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d } n X| o | i | n d S( s% Extract DNS info from a registry key.t
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S( s Query 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.i t algorithmf0.10000000000000001i t sourcet source_porti N(Q R R
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| | _ | | _ d S( s Add a TSIG signature to the query.
@param keyring: The TSIG keyring to use; defaults to None.
@type keyring: dict
@param keyname: The name of the TSIG key to use; defaults to None.
The key must be defined in the keyring. If a keyring is specified
but a keyname is not, then the key used will be the first key in the
keyring. Note that the order of keys in a dictionary is not defined,
so applications should supply a keyname when a keyring is used, unless
they know the keyring contains only one key.
@param algorithm: The TSIG key algorithm to use. The default
is dns.tsig.default_algorithm.
@type algorithm: stringi N( Rp R Rq R t keysR Rt ( R Rp Rq R ( ( R R s
c C s6 | d j o
d } n | | _ | | _ | | _ d S( s Configure Edns.
@param edns: The EDNS level to use. The default is -1, no Edns.
@type edns: int
@param ednsflags: The EDNS flags
@type ednsflags: int
@param payload: The EDNS payload size. The default is 0.
@type payload: intiN( Ru R R Rv Rw ( R Ru Rv Rw ( ( R R s
c C s
| | _ d S( s Overrides the default flags with your own
@param flags: The flags to overwrite the default with
@type flags: intN( Ry R ( R Ry ( ( R t set_flags s ( R R R R; R, R^ Rd R R R R R Rb R R R R t AR t INRz R R Rr Rs R R R ( ( ( R R] s ) #
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t a n t S( s7 Get the default resolver, initializing it if necessary.N( t default_resolverR R] ( ( ( R t get_default_resolver s
i c C s" t i | | | | | | | S( s Query nameservers to find the answer to the question.
This is a convenience function that uses the default resolver
object to make the query.
@see: L{dns.resolver.Resolver.query} for more information on the
parameters.N( R R R
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t qo Xqo Wd S( s Find the name of the zone which contains the specified name.
@param name: the query name
@type name: absolute dns.name.Name object or string
@param rdclass: The query class
@type rdclass: int
@param tcp: use TCP to make the query (default is False).
@type tcp: bool
@param resolver: the resolver to use
@type resolver: dns.resolver.Resolver object or None
@rtype: dns.name.Namei N( R R( R R R Rf Rj t resolverR R R R R R R$ R R R R R R R' R) R
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versions which use dnspython's resolver.
This can be useful in testing situations where you want to control
the resolution behavior of python code without having to change
the system's resolver settings (e.g. /etc/resolv.conf).
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