�
;�>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
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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__( ( ( s1 /usr/lib64/python2.7/site-packages/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 ( ( ( s1 /usr/lib64/python2.7/site-packages/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 ( ( ( s1 /usr/lib64/python2.7/site-packages/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 ( ( ( s1 /usr/lib64/python2.7/site-packages/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 ( ( ( s1 /usr/lib64/python2.7/site-packages/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 ( ( ( s1 /usr/lib64/python2.7/site-packages/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
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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 | _
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additionalt ednst ednsflagst payloadt optionst request_payloadt keyringt keynamet tsigt default_algorithmt keyalgorithmt request_mact
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tsig_errort fudget original_idt mact Falset xfrt origint tsig_ctxt had_tsigt multit Truet firstt index( t selfR ( ( s1 /usr/lib64/python2.7/site-packages/dns/message.pyt __init__� s: c C s d | j
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| j � S( N( t to_text( R. ( ( s1 /usr/lib64/python2.7/site-packages/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
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| 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( ( s1 /usr/lib64/python2.7/site-packages/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( ( s1 /usr/lib64/python2.7/site-packages/dns/message.pyt __eq__� s2 c C s | j | � S( s0 Are two messages not equal?
@rtype: bool( RD ( R. RB ( ( s1 /usr/lib64/python2.7/site-packages/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
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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 ( ( s1 /usr/lib64/python2.7/site-packages/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( ( s1 /usr/lib64/python2.7/site-packages/dns/message.pyt section_number s c C s� | j | � | | | | | f } | s� | j d k r[ | j j | � }
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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@ ( ( s1 /usr/lib64/python2.7/site-packages/dns/message.pyt
find_rrset, s"
c
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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@ ( ( s1 /usr/lib64/python2.7/site-packages/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@ ( ( s1 /usr/lib64/python2.7/site-packages/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( ( s1 /usr/lib64/python2.7/site-packages/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 ( ( s1 /usr/lib64/python2.7/site-packages/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( ( s1 /usr/lib64/python2.7/site-packages/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. ( ( s1 /usr/lib64/python2.7/site-packages/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( ( s1 /usr/lib64/python2.7/site-packages/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. ( ( s1 /usr/lib64/python2.7/site-packages/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 ( ( s1 /usr/lib64/python2.7/site-packages/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 ( ( ( s1 /usr/lib64/python2.7/site-packages/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� ( ( s1 /usr/lib64/python2.7/site-packages/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 ( ( s1 /usr/lib64/python2.7/site-packages/dns/message.pyt
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} } }
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_+ 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
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| _ 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@ ( ( s1 /usr/lib64/python2.7/site-packages/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( ( s1 /usr/lib64/python2.7/site-packages/dns/message.pyt read� s$ 7
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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.
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@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
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@type text: string
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@raises dns.exception.SyntaxError:
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@param f: file or string. If I{f} is a string, it is treated
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�| 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
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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
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