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� ;�>Sc @ sG d 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 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 e j j f d � � YZ d e j j f d � � YZ d e j j f d � � YZ d e j j f d � � YZ d e f d � � YZ d e f d � � YZ e! d e" e! e! e" e# e" e" e" d � Z$ d e f d � � YZ% d � Z& d � Z' e j( j) e! e" d d e! e! d � Z* e" d d d � Z+ d S( s DNS Messagesi����Nt ShortHeaderc B s e Z d Z RS( s< Raised if the DNS packet passed to from_wire() is too short.( t __name__t __module__t __doc__( ( ( s! /usr/lib/python2.7/dns/message.pyR ' s t TrailingJunkc B s e Z d Z RS( sS Raised if the DNS packet passed to from_wire() has extra junk at the end of it.( R R R ( ( ( s! /usr/lib/python2.7/dns/message.pyR + s t UnknownHeaderFieldc B s e Z d Z RS( s] Raised if a header field name is not recognized when converting from text into a message.( R R R ( ( ( s! /usr/lib/python2.7/dns/message.pyR 0 s t BadEDNSc B s e Z d Z RS( sa Raised if an OPT record occurs somewhere other than the start of the additional data section.( R R R ( ( ( s! /usr/lib/python2.7/dns/message.pyR 5 s t BadTSIGc B s e Z d Z RS( s_ Raised if a TSIG record occurs somewhere other than the end of the additional data section.( R R R ( ( ( s! /usr/lib/python2.7/dns/message.pyR : s t UnknownTSIGKeyc B s e Z d Z RS( s/ Raised if we got a TSIG but don't know the key.( R R R ( ( ( s! /usr/lib/python2.7/dns/message.pyR ? s t Messagec B s e Z d Z d d � Z d � Z d � Z d e d � Z d � Z d � Z d � Z d � Z e j j d e e d � Z e j j d e e d � Z d d d � Z d d d d d e j j d � Z d d d d d d � Z e d � Z d � Z d � Z d � Z d � Z RS( s, A DNS message. @ivar id: The query id; the default is a randomly chosen id. @type id: int @ivar flags: The DNS flags of the message. @see: RFC 1035 for an explanation of these flags. @type flags: int @ivar question: The question section. @type question: list of dns.rrset.RRset objects @ivar answer: The answer section. @type answer: list of dns.rrset.RRset objects @ivar authority: The authority section. @type authority: list of dns.rrset.RRset objects @ivar additional: The additional data section. @type additional: list of dns.rrset.RRset objects @ivar edns: The EDNS level to use. The default is -1, no Edns. @type edns: int @ivar ednsflags: The EDNS flags @type ednsflags: long @ivar payload: The EDNS payload size. The default is 0. @type payload: int @ivar options: The EDNS options @type options: list of dns.edns.Option objects @ivar request_payload: The associated request's EDNS payload size. @type request_payload: int @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 algorithm to use; defaults to dns.tsig.default_algorithm. Constants for TSIG algorithms are defined in dns.tsig, and the currently implemented algorithms are HMAC_MD5, HMAC_SHA1, HMAC_SHA224, HMAC_SHA256, HMAC_SHA384, and HMAC_SHA512. @type keyalgorithm: string @ivar request_mac: The TSIG MAC of the request message associated with this message; used when validating TSIG signatures. @see: RFC 2845 for more information on TSIG fields. @type request_mac: string @ivar fudge: TSIG time fudge; default is 300 seconds. @type fudge: int @ivar original_id: TSIG original id; defaults to the message's id @type original_id: int @ivar tsig_error: TSIG error code; default is 0. @type tsig_error: int @ivar other_data: TSIG other data. @type other_data: string @ivar mac: The TSIG MAC for this message. @type mac: string @ivar xfr: Is the message being used to contain the results of a DNS zone transfer? The default is False. @type xfr: bool @ivar origin: The origin of the zone in messages which are used for zone transfers or for DNS dynamic updates. The default is None. @type origin: dns.name.Name object @ivar tsig_ctx: The TSIG signature context associated with this message. The default is None. @type tsig_ctx: hmac.HMAC object @ivar had_tsig: Did the message decoded from wire format have a TSIG signature? @type had_tsig: bool @ivar multi: Is this message part of a multi-message sequence? The default is false. This variable is used when validating TSIG signatures on messages which are part of a zone transfer. @type multi: bool @ivar first: Is this message standalone, or the first of a multi message sequence? This variable is used when validating TSIG signatures on messages which are part of a zone transfer. @type first: bool @ivar index: An index of rrsets in the message. The index key is (section, name, rdclass, rdtype, covers, deleting). Indexing can be disabled by setting the index to None. @type index: dict c C s! | d k r! t j j � | _ n | | _ d | _ g | _ g | _ g | _ g | _ d | _ d | _ d | _ g | _ d | _ d | _ d | _ t j j | _ d | _ d | _ d | _ d | _ | j | _ d | _ t | _ d | _ d | _ t | _ t | _ t | _! i | _" d S( Ni i����t i, (# t Nonet dnst entropyt random_16t idt flagst questiont answert authorityt additionalt ednst ednsflagst payloadt optionst request_payloadt keyringt keynamet tsigt default_algorithmt keyalgorithmt request_mact other_datat tsig_errort fudget original_idt mact Falset xfrt origint tsig_ctxt had_tsigt multit Truet firstt index( t selfR ( ( s! /usr/lib/python2.7/dns/message.pyt __init__� s: c C s d | j d S( Ns <DNS message, ID t >( R ( R. ( ( s! /usr/lib/python2.7/dns/message.pyt __repr__� s c C s | j � S( N( t to_text( R. ( ( s! /usr/lib/python2.7/dns/message.pyt __str__� s c K s5 t j � } | d | j IJ| d t j j t j j | j � � IJt j j | j | j � } | d t j j | � IJ| d t j j | j � IJ| j d k r� | d | j IJ| j d k r� | d t j j | j � IJn | d I| j IJn t j j | j � } | r%| d IJn | d IJx* | j D] } | | j | | | � IJq9W| ro| d IJn | d IJx* | j D] } | | j | | | � IJq�W| r�| d IJn | d IJx* | j D] } | | j | | | � IJq�W| d IJx* | j D] } | | j | | | � IJqW| j � d S( s� Convert the message to text. The I{origin}, I{relativize}, and any other keyword arguments are passed to the rrset to_wire() method. @rtype: string s id %ds opcode %ss rcode %ss flags %si s edns %ss eflags %sR s ;ZONEs ;QUESTIONs ;PREREQs ;ANSWERs ;UPDATEs ;AUTHORITYs ;ADDITIONALi����( t cStringIOt StringIOR R t opcodeR2 t from_flagsR t rcodeR R t edns_to_textR t is_updateR R R R t getvalue( R. R' t relativizet kwt st rcR: t rrset( ( s! /usr/lib/python2.7/dns/message.pyR2 � sB " c C s- t | t � s t S| j | j k r) t S| j | j k r? t Sx$ | j D] } | | j k rI t SqI Wx$ | j D] } | | j k rp t Sqp Wx$ | j D] } | | j k r� t Sq� Wx$ | j D] } | | j k r� t Sq� Wx$ | j D] } | | j k r� t Sq� Wx$ | j D] } | | j k r t Sq Wt S( s� Two messages are equal if they have the same content in the header, question, answer, and authority sections. @rtype: bool( t isinstanceR R% R R R R R R+ ( R. t othert n( ( s! /usr/lib/python2.7/dns/message.pyt __eq__� s2 c C s | j | � S( s0 Are two messages not equal? @rtype: bool( RD ( R. RB ( ( s! /usr/lib/python2.7/dns/message.pyt __ne__ s c C s� | j t j j @d k sU | j | j k sU t j j | j � t j j | j � k rY t St j j | j | j � t j j k r� t St j j | j � r� t Sx$ | j D] } | | j k r� t Sq� Wx$ | j D] } | | j k r� t Sq� Wt S( s1 Is other a response to self? @rtype: booli ( R R t QRR R6 R7 R% R8 R t NOERRORR+ R: R ( R. RB RC ( ( s! /usr/lib/python2.7/dns/message.pyt is_response s" c C s\ | | j k r d S| | j k r& d S| | j k r9 d S| | j k rL d St d � � d S( Ni i i i s unknown section( R R R R t ValueError( R. t section( ( s! /usr/lib/python2.7/dns/message.pyt section_number s c C s� | j | � | | | | | f } | s� | j d k r[ | j j | � } | d k r� | Sq� x0 | D]% } | j | | | | | � rb | Sqb Wn | s� t � n t j j | | | | | � } | j | � | j d k r� | | j | <n | S( s Find the RRset with the given attributes in the specified section. @param section: the section of the message to look in, e.g. self.answer. @type section: list of dns.rrset.RRset objects @param name: the name of the RRset @type name: dns.name.Name object @param rdclass: the class of the RRset @type rdclass: int @param rdtype: the type of the RRset @type rdtype: int @param covers: the covers value of the RRset @type covers: int @param deleting: the deleting value of the RRset @type deleting: int @param create: If True, create the RRset if it is not found. The created RRset is appended to I{section}. @type create: bool @param force_unique: If True and create is also True, create a new RRset regardless of whether a matching RRset exists already. @type force_unique: bool @raises KeyError: the RRset was not found and create was False @rtype: dns.rrset.RRset objectN( RK R- R t gett matcht KeyErrorR R@ t RRsett append( R. RJ t namet rdclasst rdtypet coverst deletingt createt force_uniquet keyR@ ( ( s! /usr/lib/python2.7/dns/message.pyt find_rrset, s" c C sF y( | j | | | | | | | | � } Wn t k rA d } n X| S( s Get the RRset with the given attributes in the specified section. If the RRset is not found, None is returned. @param section: the section of the message to look in, e.g. self.answer. @type section: list of dns.rrset.RRset objects @param name: the name of the RRset @type name: dns.name.Name object @param rdclass: the class of the RRset @type rdclass: int @param rdtype: the type of the RRset @type rdtype: int @param covers: the covers value of the RRset @type covers: int @param deleting: the deleting value of the RRset @type deleting: int @param create: If True, create the RRset if it is not found. The created RRset is appended to I{section}. @type create: bool @param force_unique: If True and create is also True, create a new RRset regardless of whether a matching RRset exists already. @type force_unique: bool @rtype: dns.rrset.RRset object or NoneN( RY RN R ( R. RJ RQ RR RS RT RU RV RW R@ ( ( s! /usr/lib/python2.7/dns/message.pyt get_rrsetZ s i c K s� | d k r0 | j d k r' | j } q0 d } n | d k rE d } n | d k rZ d } n t j j | j | j | | � } x- | j D]" } | j | j | j | j � q� Wx* | j D] } | j t j j | | � q� Wx* | j D] } | j t j j | | � q� W| j d k r9| j | j | j | j | j � n x* | j D] } | j t j j | | � qCW| j � | j d k r�| j | j | j | j | j | j | j | j | j | j! � | j" | _" n | j# � S( s7 Return a string containing the message in DNS compressed wire format. Additional keyword arguments are passed to the rrset to_wire() method. @param origin: The origin to be appended to any relative names. @type origin: dns.name.Name object @param max_size: The maximum size of the wire format output; default is 0, which means 'the message's request payload, if nonzero, or 65536'. @type max_size: int @raises dns.exception.TooBig: max_size was exceeded @rtype: string i i�� i N($ R R t renderert RendererR R R t add_questionRQ RS RR R t add_rrsett ANSWERR t AUTHORITYR t add_ednsR R R R t ADDITIONALt write_headerR R t add_tsigR R" R# R! R R R R$ t get_wire( R. R' t max_sizeR= t rR@ ( ( s! /usr/lib/python2.7/dns/message.pyt to_wire} s6 ! % i, R c C s� | | _ | d k r. | j j � d | _ n3 t | t t f � rX t j j | � } n | | _ | | _ | | _ | d k r� | j | _ n | | _ | | _ | | _ d S( sw When sending, a TSIG signature using the specified keyring and keyname should be added. @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. @type keyname: dns.name.Name or string @param fudge: TSIG time fudge; default is 300 seconds. @type fudge: int @param original_id: TSIG original id; defaults to the message's id @type original_id: int @param tsig_error: TSIG error code; default is 0. @type tsig_error: int @param other_data: TSIG other data. @type other_data: string @param algorithm: The TSIG algorithm to use; defaults to dns.tsig.default_algorithm i N( R R t keysR RA t strt unicodeR RQ t from_textR R" R R# R! R ( R. R R R" R# R! R t algorithm( ( s! /usr/lib/python2.7/dns/message.pyt use_tsig� s i c C s� | d k s | t k r! d } n | t k r6 d } n | d k rK | } n | d k rr d } d } d } g } n- | d M} | | d >O} | d k r� g } n | | _ | | _ | | _ | | _ | | _ d S( s_ Configure EDNS behavior. @param edns: The EDNS level to use. Specifying None, False, or -1 means 'do not use EDNS', and in this case the other parameters are ignored. Specifying True is equivalent to specifying 0, i.e. 'use EDNS0'. @type edns: int or bool or None @param ednsflags: EDNS flag values. @type ednsflags: int @param payload: The EDNS sender's payload field, which is the maximum size of UDP datagram the sender can handle. @type payload: int @param request_payload: The EDNS payload size to use when sending this message. If not specified, defaults to the value of payload. @type request_payload: int or None @param options: The EDNS options @type options: None or list of dns.edns.Option objects @see: RFC 2671 i����i l �~ i N( R R% R+ R R R R R ( R. R R R R R ( ( s! /usr/lib/python2.7/dns/message.pyt use_edns� s( c C sf | r: | j d k r" | j � n | j t j j O_ n( | j d k rb | j t j j M_ n d S( s Enable or disable 'DNSSEC desired' flag in requests. @param wanted: Is DNSSEC desired? If True, EDNS is enabled if required, and then the DO bit is set. If False, the DO bit is cleared if EDNS is enabled. @type wanted: bool i N( R Ro R R R t DO( R. t wanted( ( s! /usr/lib/python2.7/dns/message.pyt want_dnssec s c C s t j j | j | j � S( s. Return the rcode. @rtype: int ( R R8 R7 R R ( R. ( ( s! /usr/lib/python2.7/dns/message.pyR8 s c C s� t j j | � \ } } | j d M_ | j | O_ | j d M_ | j | O_ | j d k r~ | j d k r~ d | _ n d S( sP Set the rcode. @param rcode: the rcode @type rcode: int i� l ��i N( R R8 t to_flagsR R R ( R. R8 t valuet evalue( ( s! /usr/lib/python2.7/dns/message.pyt set_rcode s c C s t j j | j � S( s/ Return the opcode. @rtype: int ( R R6 R7 R ( R. ( ( s! /usr/lib/python2.7/dns/message.pyR6 ! s c C s. | j d M_ | j t j j | � O_ d S( sT Set the opcode. @param opcode: the opcode @type opcode: int i�� N( R R R6 Rs ( R. R6 ( ( s! /usr/lib/python2.7/dns/message.pyt set_opcode' s N( R R R R R/ R1 R3 R+ R2 RD RE RH RK R t rdatatypet NONER% RY RZ Rh R R Rn Ro Rr R8 Rv R6 Rw ( ( ( s! /usr/lib/python2.7/dns/message.pyR C s. J 3 - !. )* t _WireReaderc B s; e Z d Z e e e d � Z d � Z d � Z d � Z RS( s� Wire format reader. @ivar wire: the wire-format message. @type wire: string @ivar message: The message object being built @type message: dns.message.Message object @ivar current: When building a message object from wire format, this variable contains the offset from the beginning of wire of the next octet to be read. @type current: int @ivar updating: Is the message a dynamic update? @type updating: bool @ivar one_rr_per_rrset: Put each RR into its own RRset? @type one_rr_per_rrset: bool @ivar ignore_trailing: Ignore trailing junk at end of request? @type ignore_trailing: bool @ivar zone_rdclass: The class of the zone in messages which are DNS dynamic updates. @type zone_rdclass: int c C s^ t j j | � | _ | | _ d | _ t | _ t j j | _ | | _ | | _ | | _ d S( Ni ( R t wiredatat maybe_wrapt wiret messaget currentR% t updatingt rdataclasst INt zone_rdclasst question_onlyt one_rr_per_rrsett ignore_trailing( R. R} R~ R� R� R� ( ( s! /usr/lib/python2.7/dns/message.pyR/ E s c C s | j r$ | d k r$ t j j � n x� t d | � D]� } t j j | j | j � \ } } | j j d k r� | j | j j � } n | j | | _ t j d | j | j | j d !� \ } } | j d | _ | j j | j j | | | d t d t �| j r4 | | _ q4 q4 Wd S( s� Read the next I{qcount} records from the wire data and add them to the question section. @param qcount: the number of questions in the message @type qcount: inti i s !HHi RV RW N( R� R t exceptiont FormErrort xrangeRQ t from_wireR} R R~ R' R R< t structt unpackRY R R+ R� ( R. t qcountt it qnamet usedRS RR ( ( s! /usr/lib/python2.7/dns/message.pyt _get_questionP s ! # c C s� | j s | j r t } n t } t } xjt d | � D]Y} | j } t j j | j | j � \ } } | } | j j d k r� | j | j j � } n | j | | _ t j d | j | j | j d !� \ } } } } | j d | _ | t j j k r�| | j j k s| r t � n | | j _ | | j _ | d @d ?| j _ g | j _ | j } | } x� | d k r�t j d | j | | d !� \ } } | d } t j j | | j | | � } | j j j | � | | } | d | } qfWt } n�| t j j k r5| | j j k o)| | d k s5t � n | j j d k rVt d � � n | j j j | � } | d k r�t d | � � n | | j _ t j j! | j | j | � \ | j _" | j _# t j j$ | j | | t% t& j& � � | j j' | | j | | j j( | j j) | j j* � | j _( t | j _+ nK| d k rJd } n | j r�| t j, j- k sw| t j, j. k r�| } | j/ } n d } | t j, j- k s�| t j, j. k r�| | j j0 k r�t j j. } d } n9 t j1 j | | | j | j | | j j � } | j2 � } | j j3 r:| t j j4 k r:t } n | j j5 | | | | | | t | � } | d k r�| j6 | | � n | j | | _ q7 Wd S( s/ Read the next I{count} records from the wire data and add them to the specified section. @param section: the section of the message to which to add records @type section: list of dns.rrset.RRset objects @param count: the number of records to read @type count: inti s !HHIHi i � i s !HHi i s" got signed message without keyrings key '%s' unknownN(7 R� R� R+ R% R� R R RQ R� R} R~ R' R R< R� R� Rx t OPTR R R R R R t option_from_wireRP t TSIGR R R RL R R t get_algorithm_and_macR R$ t validatet intt timeR R( R* R, R) R� t ANYRy R� R t rdataRT R& t SOARY t add( R. RJ t countRW t seen_optR� t rr_startRQ R� t absolute_nameRS RR t ttlt rdlenR t optslent otypet olent optt secretRU RT t rdR@ ( ( s! /usr/lib/python2.7/dns/message.pyt _get_sectionh s� ! ) c C sH t | j � } | d k r$ t � n t j d | j d � \ | j _ | j _ } } } } d | _ t j j | j j � r� t | _ n | j | � | j r� d S| j | j j | � | j | j j | � | j | j j | � | j r| j | k rt � n | j j rD| j j rD| j j rD| j j j | j � n d S( sN Read a wire format DNS message and build a dns.message.Message object.i s !HHHHHHN( t lenR} R R� R� R~ R R R R R6 R: R+ R� R� R� R� R R R R� R R* R( R) t update( R. t lR� t ancountt aucountt adcount( ( s! /usr/lib/python2.7/dns/message.pyt read� s$ 7 ( R R R R% R/ R� R� R� ( ( ( s! /usr/lib/python2.7/dns/message.pyRz / s bR c C st t d d � } | | _ | | _ | | _ | | _ | | _ | | _ | | _ t | | | | | � } | j � | S( s) Convert a DNS wire format message into a message object. @param keyring: The keyring to use if the message is signed. @type keyring: dict @param request_mac: If the message is a response to a TSIG-signed request, I{request_mac} should be set to the MAC of that request. @type request_mac: string @param xfr: Is this message part of a zone transfer? @type xfr: bool @param origin: If the message is part of a zone transfer, I{origin} should be the origin name of the zone. @type origin: dns.name.Name object @param tsig_ctx: The ongoing TSIG context, used when validating zone transfers. @type tsig_ctx: hmac.HMAC object @param multi: Is this message part of a multiple message sequence? @type multi: bool @param first: Is this message standalone, or the first of a multi message sequence? @type first: bool @param question_only: Read only up to the end of the question section? @type question_only: bool @param one_rr_per_rrset: Put each RR into its own RRset @type one_rr_per_rrset: bool @param ignore_trailing: Ignore trailing junk at end of request? @type ignore_trailing: bool @raises ShortHeader: The message is less than 12 octets long. @raises TrailingJunk: There were octets in the message past the end of the proper DNS message. @raises BadEDNS: An OPT record was in the wrong section, or occurred more than once. @raises BadTSIG: A TSIG record was not the last record of the additional data section. @rtype: dns.message.Message objectR i ( R R R R& R' R( R* R, Rz R� ( R} R R R& R' R( R* R, R� R� R� t mt reader( ( s! /usr/lib/python2.7/dns/message.pyR� � s ( t _TextReaderc B s; e Z d Z d � Z d � Z d � Z d � Z d � Z RS( s Text format reader. @ivar tok: the tokenizer @type tok: dns.tokenizer.Tokenizer object @ivar message: The message object being built @type message: dns.message.Message object @ivar updating: Is the message a dynamic update? @type updating: bool @ivar zone_rdclass: The class of the zone in messages which are DNS dynamic updates. @type zone_rdclass: int @ivar last_name: The most recently read name when building a message object from text format. @type last_name: dns.name.Name object c C sC | | _ t j j | � | _ d | _ t j j | _ t | _ d S( N( R~ R t tokenizert Tokenizert tokR t last_nameR� R� R� R% R� ( R. t textR~ ( ( s! /usr/lib/python2.7/dns/message.pyR/ , s c C s� | j j � } | j } | d k r< | j j � | j _ n:| d k r� x^ t r� | j j � } | j � s� | j j | � Pn | j j t j j | j � B| j _ qK Wt j j | j j � rvt | _ qvn�| d k r| j j � | j _ | j j | j j d >B| j _ nb| d k r�| j j d k rAd | j _ n x2t r�| j j � } | j � sy| j j | � Pn | j j t j j | j � B| j _ qDWn� | d k r�| j j � | j _ | j j d k rvd | j _ qvn� | d k r6| j j � } | j j t j j t j j | � � B| j _ n@ | d k rp| j j � } | j j t j j | � � n t � | j j � d S( s5 Process one line from the text format header section.R R R i t eflagsi R R6 R8 N( R� RL Rt t get_intR~ R R+ t is_identifiert ungetR R Rl R6 R: R� R R t edns_from_textR t get_stringRs Rv R8 R t get_eol( R. RJ t tokent whatR� ( ( s! /usr/lib/python2.7/dns/message.pyt _header_line3 sR # ( c C sS | j j d t � } | j � s? t j j | j d � | _ n | j } | j j � } | j � sr t j j � n yC t j j | j � } | j j � } | j � s� t j j � n Wn5 t j j k r� t j j � n t j j } n Xt j j | j � } | j j | j j | | | d t d t �| j rB| | _ n | j j � d S( s7 Process one line from the text format question section.t want_leadingRV RW N( R� RL R+ t is_whitespaceR RQ Rl Rt R R� R� R� t SyntaxErrorR� R� Rx R~ RY R R� R� R� ( R. RJ R� RQ RR RS ( ( s! /usr/lib/python2.7/dns/message.pyt _question_linea s. c C sg d } | j j d t � } | j � sE t j j | j d � | _ n | j } | j j � } | j � sx t j j � n y@ t | j d � } | j j � } | j � s� t j j � n Wn/ t j j k r� t j j � n d } n Xyy t j j | j � } | j j � } | j � s,t j j � n | t j j k sP| t j j k rb| } | j } n Wn5 t j j k r�t j j � n t j j } n Xt j j | j � } | j j � } | j � s| j j | � t j j | | | j d � } | j � } n d } t j j } | j j | | | | | | t | j � } | d k rc| j | | � n d S( sf Process one line from the text format answer, authority, or additional data sections. R� i N( R R� RL R+ R� R RQ Rl Rt R� R� R� R� R� R� R� Ry R� R� Rx t is_eol_or_eofR� R� RT R~ RY R� R� ( R. RJ RU R� RQ R� RR RS R� RT R@ ( ( s! /usr/lib/python2.7/dns/message.pyt _rr_line~ sT $ c C sS | j } d } x=| j j t t � } | j � r7 Pn | j � r1| j j � } | d k rj | j } n� | d k s� | d k r� | j } | j j } n� | d k s� | d k r� | j } | j j } nT | d k s� | d k r� | j } | j j } n$ | d k r | j } | j j } n | j j � q n | j j | � | | � q Wd S( sN Read a text format DNS message and build a dns.message.Message object.t HEADERt QUESTIONt ZONER_ t PREREQR` t UPDATERb N( R� R R� RL R+ R� t is_commentRt t upperR� R~ R R� R R R R� R� ( R. t line_methodRJ R� t u( ( s! /usr/lib/python2.7/dns/message.pyR� � s4 ( R R R R/ R� R� R� R� ( ( ( s! /usr/lib/python2.7/dns/message.pyR� s . 5c C s& t � } t | | � } | j � | S( s� Convert the text format message into a message object. @param text: The text format message. @type text: string @raises UnknownHeaderField: @raises dns.exception.SyntaxError: @rtype: dns.message.Message object( R R� R� ( R� R� R� ( ( s! /usr/lib/python2.7/dns/message.pyRl � s c C s� t j d k r t } d } n t } d } t | | � rQ t | | � } t } n t } z t | � } Wd | r} | j � n X| S( s Read the next text format message from the specified file. @param f: file or string. If I{f} is a string, it is treated as the name of a file to open. @raises UnknownHeaderField: @raises dns.exception.SyntaxError: @rtype: dns.message.Message objecti t rURg N( t syst hexversiont basestringRj RA t fileR+ R% Rl t close( t ft str_typet optst want_closeR� ( ( s! /usr/lib/python2.7/dns/message.pyt from_file� s i i c C s� t | t t f � r* t j j | � } n t | t t f � rT t j j | � } n t | t t f � r~ t j j | � } n t � } | j t j j O_ | j | j | | | d t d t �| j | | | | | � | j | � | S( sW Make a query message. The query name, type, and class may all be specified either as objects of the appropriate type, or as strings. The query will have a randomly choosen query id, and its DNS flags will be set to dns.flags.RD. @param qname: The query name. @type qname: dns.name.Name object or string @param rdtype: The desired rdata type. @type rdtype: int @param rdclass: The desired rdata class; the default is class IN. @type rdclass: int @param use_edns: The EDNS level to use; the default is None (no EDNS). See the description of dns.message.Message.use_edns() for the possible values for use_edns and their meanings. @type use_edns: int or bool or None @param want_dnssec: Should the query indicate that DNSSEC is desired? @type want_dnssec: bool @param ednsflags: EDNS flag values. @type ednsflags: int @param payload: The EDNS sender's payload field, which is the maximum size of UDP datagram the sender can handle. @type payload: int @param request_payload: The EDNS payload size to use when sending this message. If not specified, defaults to the value of payload. @type request_payload: int or None @param options: The EDNS options @type options: None or list of dns.edns.Option objects @see: RFC 2671 @rtype: dns.message.Message objectRV RW ( RA Rj Rk R RQ Rl Rx R� R R t RDRY R R+ Ro Rr ( R� RS RR Ro Rr R R R R R� ( ( s! /usr/lib/python2.7/dns/message.pyt make_query s $ i i, c C s | j t j j @r( t j j d � � n t j j | j � } t j j | j t j j @B| _ | r{ | j t j j O_ n | j | j � � t | j � | _ | j d k r� | j d d | | j � n | j r | j | j | j | d d d | j � | j | _ n | S( s Make a message which is a response for the specified query. The message returned is really a response skeleton; it has all of the infrastructure required of a response, but none of the content. The response's question section is a shallow copy of the query's question section, so the query's question RRsets should not be changed. @param query: the query to respond to @type query: dns.message.Message object @param recursion_available: should RA be set in the response? @type recursion_available: bool @param our_payload: payload size to advertise in EDNS responses; default is 8192. @type our_payload: int @param fudge: TSIG time fudge; default is 300 seconds. @type fudge: int @rtype: dns.message.Message objects& specified query message is not a queryi R N( R R RF R� R� R~ R R R� t RARw R6 t listR R Ro R R) Rn R R R R R$ R ( t queryt recursion_availablet our_payloadR" t response( ( s! /usr/lib/python2.7/dns/message.pyt make_response6 s (, R R4 t randomR� R� R� t dns.ednsR t dns.exceptiont dns.flagst dns.namet dns.opcodet dns.entropyt dns.rcodet dns.rdatat dns.rdataclasst dns.rdatatypet dns.rrsett dns.renderert dns.tsigt dns.wiredataR� R� R R t DNSExceptionR R R R t objectR Rz R R% R+ R� R� Rl R� R� R� R� R� ( ( ( s! /usr/lib/python2.7/dns/message.pyt <module> sP � �� 5� 0