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query.pyc
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� ť�Sc @ s� d Z d d l m Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l Z d e j j f d � � YZ d e j j f d � � YZ d � Z d � Z d � Z d � Z d � Z e e d � r#e a n e a d � Z d � Z d � Z d � Z d d d d d e! e! d � Z" d � Z# d � Z$ d � Z% d d d d d e! d � Z& e j' j( e j) j* d d d d e+ d d d d d e! e j, j- d � Z. d S( s Talk to a DNS server.i����( t generatorsNt UnexpectedSourcec B s e Z d Z RS( sD Raised if a query response comes from an unexpected address or port.( t __name__t __module__t __doc__( ( ( s /usr/lib/python2.7/dns/query.pyR " s t BadResponsec B s e Z d Z RS( sB Raised if a query response does not respond to the question asked.( R R R ( ( ( s /usr/lib/python2.7/dns/query.pyR & s c C s" | d k r d St j � | Sd S( N( t Nonet time( t timeout( ( s /usr/lib/python2.7/dns/query.pyt _compute_expiration* s c C s� d } | r | t j O} n | r2 | t j O} n | rH | t j O} n t j � } | j | | � | r� | j t | d � � } n | j � } t | � S( sq Poll polling backend. @param fd: File descriptor @type fd: int @param readable: Whether to wait for readability @type readable: bool @param writable: Whether to wait for writability @type writable: bool @param timeout: Deadline timeout (expiration time, in seconds) @type timeout: float @return True on success, False on timeout i i� ( t selectt POLLINt POLLOUTt POLLERRt pollt registert longt bool( t fdt readablet writablet errorR t event_maskt pollablet event_list( ( s /usr/lib/python2.7/dns/query.pyt _poll_for0 s c C s� g g g } } } | r& | g } n | r8 | g } n | rJ | g } n | d k rw t j | | | � \ } } } n! t j | | | | � \ } } } t | p� | p� | � S( ss Select polling backend. @param fd: File descriptor @type fd: int @param readable: Whether to wait for readability @type readable: bool @param writable: Whether to wait for writability @type writable: bool @param timeout: Deadline timeout (expiration time, in seconds) @type timeout: float @return True on success, False on timeout N( R R R ( R R R R R t rsett wsett xsett rcountt wcountt xcount( ( s /usr/lib/python2.7/dns/query.pyt _select_forN s !!c C s� t } x� | s� | d k r$ d } n+ | t j � } | d k rO t j j � n y+ t | | | | | � sy t j j � n Wn5 t j k r� } | j d t j k r� | � q� n Xt } q Wd S( Ng i ( t FalseR R t dnst exceptiont Timeoutt _polling_backendR R t argst errnot EINTRt True( R R R R t expirationt doneR t e( ( s /usr/lib/python2.7/dns/query.pyt _wait_forj s c C s | a d S( s# Internal API. Do not use. N( R% ( t fn( ( s /usr/lib/python2.7/dns/query.pyt _set_polling_backend{ s R c C s t | t t t | � d S( N( R- R) R! ( t sR* ( ( s /usr/lib/python2.7/dns/query.pyt _wait_for_readable� s c C s t | t t t | � d S( N( R- R! R) ( R0 R* ( ( s /usr/lib/python2.7/dns/query.pyt _wait_for_writable� s c C sP t j j | | d � } t j j | | d � } | | k oO | d | d k S( Ni i ( R" t inett inet_pton( t aft a1t a2t n1t n2( ( s /usr/lib/python2.7/dns/query.pyt _addresses_equal� s c C s | d k r; y t j j | � } Wq; t j j } q; Xn | t j j k r� | | f } | d k sq | d k r| d k r� d } n | | f } qni | t j j k r| | d d f } | d k s� | d k r| d k r� d } n | | d d f } qn | | | f S( Ni s 0.0.0.0s ::( R R" R3 t af_for_addresst AF_INETt AF_INET6( R5 t wheret portt sourcet source_portt destination( ( s /usr/lib/python2.7/dns/query.pyt _destination_and_source� s$ i5 i c C ss | j � } t | | | | | � \ } } } t j | t j d � } z� t | � } | j d � | d k r} | j | � n t | | � | j | | � x� t | | � | j d � \ } } t | | | � s� t j j | � r� | d | d k r� Pn | s� t d | | f � � q� q� WWd | j � Xt j j | d | j d | j d | �} | j | � sot � n | S( s� Return the response obtained after sending a query via UDP. @param q: the query @type q: dns.message.Message @param where: where to send the message @type where: string containing an IPv4 or IPv6 address @param timeout: The number of seconds to wait before the query times out. If None, the default, wait forever. @type timeout: float @param port: The port to which to send the message. The default is 53. @type port: int @param af: the address family to use. The default is None, which causes the address family to use to be inferred from the form of of where. If the inference attempt fails, AF_INET is used. @type af: int @rtype: dns.message.Message object @param source: source address. The default is the wildcard address. @type source: string @param source_port: The port from which to send the message. The default is 0. @type source_port: int @param ignore_unexpected: If True, ignore responses from unexpected sources. The default is False. @type ignore_unexpected: bool @param one_rr_per_rrset: Put each RR into its own RRset @type one_rr_per_rrset: bool i i�� i s$ got a response from %s instead of %sNt keyringt request_mact one_rr_per_rrset( t to_wireRC t sockett SOCK_DGRAMR t setblockingR t bindR2 t sendtoR1 t recvfromR: R" R3 t is_multicastR t closet messaget from_wireRD t mact is_responseR ( t qR> R R? R5 R@ RA t ignore_unexpectedRF t wireRB R0 R* t from_addresst r( ( s /usr/lib/python2.7/dns/query.pyt udp� s8 ! c C sh d } x[ | d k rc t | | � | j | � } | d k rF t � n | t | � } | | } q W| S( s� Read the specified number of bytes from sock. Keep trying until we either get the desired amount, or we hit EOF. A Timeout exception will be raised if the operation is not completed by the expiration time. t i ( R1 t recvt EOFErrort len( t sockt countR* R0 t n( ( s /usr/lib/python2.7/dns/query.pyt _net_read� s c C sM d } t | � } x4 | | k rH t | | � | | j | | � 7} q Wd S( s� Write the specified data to the socket. A Timeout exception will be raised if the operation is not completed by the expiration time. i N( R] R2 t send( R^ t dataR* t currentt l( ( s /usr/lib/python2.7/dns/query.pyt _net_write� s c C s� y | j | � Wnl t j k r t j � d \ } } | d t j k r� | d t j k r� | d t j k r� | � q� n Xd S( Ni i ( t connectRH R t syst exc_infoR' t EINPROGRESSt EWOULDBLOCKt EALREADY( R0 t addresst tyt v( ( s /usr/lib/python2.7/dns/query.pyt _connect s c C sJ | j � } t | | | | | � \ } } } t j | t j d � } z� t | � } | j d � | d k r} | j | � n t | | � t | � } t j d | � | } t | | | � t | d | � } t j d | � \ } t | | | � } Wd | j � Xt j j | d | j d | j d | �} | j | � sFt � n | S( s Return the response obtained after sending a query via TCP. @param q: the query @type q: dns.message.Message object @param where: where to send the message @type where: string containing an IPv4 or IPv6 address @param timeout: The number of seconds to wait before the query times out. If None, the default, wait forever. @type timeout: float @param port: The port to which to send the message. The default is 53. @type port: int @param af: the address family to use. The default is None, which causes the address family to use to be inferred from the form of of where. If the inference attempt fails, AF_INET is used. @type af: int @rtype: dns.message.Message object @param source: source address. The default is the wildcard address. @type source: string @param source_port: The port from which to send the message. The default is 0. @type source_port: int @param one_rr_per_rrset: Put each RR into its own RRset @type one_rr_per_rrset: bool i s !Hi NRD RE RF ( RG RC RH t SOCK_STREAMR RJ R RK Rp R] t structt packRf Ra t unpackRO R" RP RQ RD RR RS R ( RT R> R R? R5 R@ RA RF RV RB R0 R* Re t tcpmsgt ldataRX ( ( s /usr/lib/python2.7/dns/query.pyt tcp s, ! c & c sZ t | t t f � r* t j j | � } n t | t t f � rT t j j | � } n t j j | | | � } | t j j k r� t j j | d d d d | � } | j j | � n | d k r� | j | | d | �n | j � } t | | | | | � \ } } } | rG| t j j k r,t d � � n t j | t j d � } n t j | t j d � } | j d � | d k r�| j | � n t | � } t | | � t | � } | r�t | | � | j | � n& t j d | � | } t | | | � t } t } t } d } d } | r/| } t j j! } n d } | } d } t } x| sKt | � }! |! d k st|! | k r}| }! n | r�t" | | � | j# d � \ } }" n9 t$ | d |! � }# t j% d |# � \ } t$ | | |! � } t j j& | d | j' d | j( d t d | d | d t d | d | t j j k �}$ |$ j) } t } d }% | d k r|$ j* sv|$ j* d j | k r�t j+ j, d � � n |$ j* d } | j- t j j. k r�t j+ j, d � � n d }% | j/ � } | t j j k r| d j0 | k rt } q t } qn x|$ j* |% D]� } | r=t j+ j, d � � n | j- t j j. k r�| j | k r�| r�| d j0 | k r�t j+ j, d � � n t } n | t j j k r�| } n | | k r| t j j1 k s�| t j j k r| rt } qq | r t j j1 } t } q q W| rC| j' rC|$ j2 rCt j+ j, d � � n |$ VqJW| j3 � d S( s� Return a generator for the responses to a zone transfer. @param where: where to send the message @type where: string containing an IPv4 or IPv6 address @param zone: The name of the zone to transfer @type zone: dns.name.Name object or string @param rdtype: The type of zone transfer. The default is dns.rdatatype.AXFR. @type rdtype: int or string @param rdclass: The class of the zone transfer. The default is dns.rdataclass.IN. @type rdclass: int or string @param timeout: The number of seconds to wait for each response message. If None, the default, wait forever. @type timeout: float @param port: The port to which to send the message. The default is 53. @type port: int @param keyring: The TSIG keyring to use @type keyring: dict @param keyname: The name of the TSIG key to use @type keyname: dns.name.Name object or string @param relativize: If True, all names in the zone will be relativized to the zone origin. It is essential that the relativize setting matches the one specified to dns.zone.from_xfr(). @type relativize: bool @param af: the address family to use. The default is None, which causes the address family to use to be inferred from the form of of where. If the inference attempt fails, AF_INET is used. @type af: int @param lifetime: The total number of seconds to spend doing the transfer. If None, the default, then there is no limit on the time the transfer may take. @type lifetime: float @rtype: generator of dns.message.Message objects. @param source: source address. The default is the wildcard address. @type source: string @param source_port: The port from which to send the message. The default is 0. @type source_port: int @param serial: The SOA serial number to use as the base for an IXFR diff sequence (only meaningful if rdtype == dns.rdatatype.IXFR). @type serial: int @param use_udp: Use UDP (only meaningful for IXFR) @type use_udp: bool @param keyalgorithm: The TSIG algorithm to use; defaults to dns.tsig.default_algorithm @type keyalgorithm: string i t INt SOAs . . %u 0 0 0 0t algorithms cannot do a UDP AXFRs !Hi�� i RD RE t xfrt origint tsig_ctxt multit firstRF s No answer or RRset not for qnames first RRset is not an SOAi s answers after final SOAs IXFR base serial mismatchs missing TSIGN(4 t isinstancet strt unicodeR" t namet from_textt rdatatypeRP t make_queryt IXFRt rrsett authorityt appendR t use_tsigRG RC t ValueErrorRH RI Rq RJ RK R Rp R] R2 Rb Rr Rs Rf R! R) t emptyR1 RM Ra Rt RQ RD RR R} t answerR# t FormErrort rdtypeRy t copyt serialt AXFRt had_tsigRO (& R> t zoneR� t rdclassR R? RD t keynamet relativizeR5 t lifetimeR@ RA R� t use_udpt keyalgorithmRT R� RV RB R0 R* Re Ru R+ t delete_modet expecting_SOAt soa_rrsett soa_countR| t onameR} R t mexpirationRW Rv RX t answer_index( ( s /usr/lib/python2.7/dns/query.pyR{ H s� 5 ! $ (/ R t __future__R R' R RH Rr Rh R t dns.exceptionR" t dns.inett dns.namet dns.messaget dns.rdataclasst dns.rdatatypeR# t DNSExceptionR R� R R R R R- R/ t hasattrR% R1 R2 R: RC R R! RY Ra Rf Rp Rw R� R� t rdataclassRx R) t tsigt default_algorithmR{ ( ( ( s /usr/lib/python2.7/dns/query.pyt <module> sL ; 7