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d de j j Z G dd de j j Z G dd de j j Z!G dd de j j Z"G dd de j j#Z$G dd de j j Z%G dd de j j Z&G dd d e j j#Z'G d d d e j j#Z(G d d d e j j#Z)G d!d" d"e j j#Z*G d#d$ d$e+Z,G d%d& d&e,Z-G d'd( d(e,Z.e/d)Z0d*Z1e-dZ2e-dZ3e2Z4e.ddddZ5e.ddddZ6e.ddddZ7e.ddddZ8e5Z9d+d, Z:d-d. Z;d/d0 Ze=g Z?e>dfd4d5Z@e>dfd6d7ZAd8d9 ZBdS ):zDNS Names.
@var root: The DNS root name.
@type root: dns.name.Name object
@var empty: The empty DNS name.
@type empty: dns.name.Name object
)BytesIONTF )long binary_type text_typeunichr maybe_decode P c @ s e Zd ZdZdS )
EmptyLabelzA DNS label is empty.N)__name__
__module__ __qualname____doc__ r r /usr/lib/python3.6/name.pyr 4 s r c @ s e Zd ZdZdS ) BadEscapez8An escaped code in a text format of DNS name is invalid.N)r r r r r r r r r 9 s r c @ s e Zd ZdZdS )
BadPointerz=A DNS compression pointer points forward instead of backward.N)r r r r r r r r r > s r c @ s e Zd ZdZdS ) BadLabelTypez2The label type in DNS name wire format is unknown.N)r r r r r r r r r C s r c @ s e Zd ZdZdS )NeedAbsoluteNameOrOriginzvAn attempt was made to convert a non-absolute name to
wire when there was also a non-absolute (or missing) origin.N)r r r r r r r r r H s r c @ s e Zd ZdZdS ) NameTooLongz A DNS name is > 255 octets long.N)r r r r r r r r r N s r c @ s e Zd ZdZdS ) LabelTooLongz A DNS label is > 63 octets long.N)r r r r r r r r r S s r c @ s e Zd ZdZdS )AbsoluteConcatenationz]An attempt was made to append anything other than the
empty name to an absolute DNS name.N)r r r r r r r r r X s r c @ s e Zd ZdZdS )NoParentzMAn attempt was made to get the parent of the root name
or the empty name.N)r r r r r r r r r ^ s r c @ s e Zd ZdZdS )
NoIDNA2008zLIDNA 2008 processing was requested but the idna module is not
available.N)r r r r r r r r r c s r c @ s e Zd ZdZedgZdZdS )
IDNAExceptionz$IDNA processing raised an exception.idna_exceptionz+IDNA processing exception: {idna_exception}N)r r r r setZ supp_kwargsZfmtr r r r r i s
r c @ s8 e Zd ZdZdd Zdd Zdd Zdd Zd
d Zd S )
IDNACodecz.Abstract base class for IDNA encoder/decoders.c C s d S )Nr )selfr r r __init__t s zIDNACodec.__init__c C s |j jdS )Ns xn--)lower
startswith)r" labelr r r is_idnaw s zIDNACodec.is_idnac C s" x |D ]}t |dkrdS qW dS )N FT)ord)r" r& cr r r is_all_asciiz s
zIDNACodec.is_all_asciic C s t d S )N)NotImplementedError)r" r& r r r encode s zIDNACodec.encodec C s` | j |rPy|dd jd}W qX tk
rL } zt|dW Y d d }~X qXX nt|}t|S )Nr
Zpunycode)r )r' decode Exceptionr r _escapify)r" r& er r r r. s
zIDNACodec.decodeN) r r r r r# r' r+ r- r. r r r r r! p s r! c s6 e Zd ZdZd fdd Zdd Z fddZ ZS )
IDNA2003CodeczIDNA 2003 encoder/decoder.Fc s t t| j || _dS )a Initialize the IDNA 2003 encoder/decoder.
@param strict_decode: If True, then IDNA2003 checking is done when
decoding. This can cause failures if the name was encoded with
IDNA2008. The default is False.
@type strict_decode: bool
N)superr2 r#
strict_decode)r" r4 ) __class__r r r# s zIDNA2003Codec.__init__c C s6 |dkr dS y t jj|S tk
r0 tY nX d S )N ) encodingsidnaZToASCII UnicodeErrorr )r" r& r r r r- s zIDNA2003Codec.encodec sd | j stt| j|S |dkr"dS yttjj|S tk
r^ } zt |dW Y d d }~X nX d S )Nr7 r6 )r )
r4 r3 r2 r. r0 r8 r9 Z ToUnicoder/ r )r" r& r1 )r5 r r r. s zIDNA2003Codec.decode)F)r r r r r# r- r.
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IDNA2008CodeczIDNA 2008 encoder/decoder.Fc s* t t| j || _|| _|| _|| _dS )a Initialize the IDNA 2008 encoder/decoder.
@param uts_46: If True, apply Unicode IDNA compatibility processing
as described in Unicode Technical Standard #46
(U{http://unicode.org/reports/tr46/}). This parameter is only
meaningful if IDNA 2008 is in use. If False, do not apply
the mapping. The default is False
@type uts_46: bool
@param transitional: If True, use the "transitional" mode described
in Unicode Technical Standard #46. This parameter is only
meaningful if IDNA 2008 is in use. The default is False.
@type transitional: bool
@param allow_pure_ascii: If True, then a label which
consists of only ASCII characters is allowed. This is less strict
than regular IDNA 2008, but is also necessary for mixed names,
e.g. a name with starting with "_sip._tcp." and ending in an IDN
suffixm which would otherwise be disallowed. The default is False
@type allow_pure_ascii: bool
@param strict_decode: If True, then IDNA2008 checking is done when
decoding. This can cause failures if the name was encoded with
IDNA2003. The default is False.
@type strict_decode: bool
N)r3 r< r# uts_46 transitionalallow_pure_asciir4 )r" r= r> r? r4 )r5 r r r# s
zIDNA2008Codec.__init__c C s |dkr dS | j r&| j|r&|jdS ts.ty | jrFtj|d| j}tj |S tj
k
r| } zt |dW Y d d }~X nX d S )Nr6 r7 asciiF)r ) r? r+ r- have_idna_2008r r= r9 uts46_remapr> Zalabel IDNAErrorr )r" r& r1 r r r r- s
zIDNA2008Codec.encodec s | j stt| j|S |dkr"dS ts*ty"| jr@tj|dd}t tj
|S tj k
rz } zt |dW Y d d }~X nX d S )Nr7 r6 F)r )
r4 r3 r< r. rA r r= r9 rB r0 ZulabelrC r )r" r& r1 )r5 r r r. s zIDNA2008Codec.decode)FFFF)r r r r r# r- r. r; r r )r5 r r< s
r< s "().;\@$z"().;\@$c C s t | trzd}t | tr | j } xTt| D ]H}|tkrH|dt| 7 }q*|dkrf|dk rf|t|7 }q*|d| 7 }q*W |S d}xD| D ]<}|tkr|d| 7 }q|dkr|dt| 7 }q||7 }qW |S )zaEscape the characters in label which need it.
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@rtype: stringr6 \ r( z\%03d )
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r0 c C s t | }d}d}d}xH| D ]@}t |}||d 7 }|dkr>t|dk rR|dkrR|}|d7 }qW |dkrjt|dkr||d krtdS )a/ Check for empty labels in the middle of a label sequence,
labels that are too long, and for too many labels.
@raises NameTooLong: the name as a whole is too long
@raises EmptyLabel: a label is empty (i.e. the root label) and appears
in a position other than the end of the label sequencer r ? r7 N)lenr r r )labelsltotalijr& Zllr r r _validate_labels s
rW c C s( t | tr| S t | tr | j S td S )N)rG r r r-
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rY c sD e Zd ZdZdgZ fddZdd Zdd Zd d
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dd Zdd Zdd Zdd Zd d Zd d Zd!d" Zd#d$ Zd%d& Zd'd( Zd)d* Zd+d, ZdLd.d/ZdMd1d2ZdNd3d4Z dOd5d6Z d7d8 Z d9d: Z d;d< Z d=d> Z!d?d@ Z"dAdB Z#dCdD Z$dEdF Z%dPdHdIZ&dJdK Z' Z(S )QNamezA DNS name.
The dns.name.Name class represents a DNS name as a tuple of labels.
Instances of the class are immutable.
@ivar labels: The tuple of labels in the name. Each label is a string of
up to 63 octets.rR c s2 dd |D }t t| jdt| t| j dS )zInitialize a domain name from a list of labels.
@param labels: the labels
@type labels: any iterable whose values are strings
c S s g | ] }t |qS r )rY ).0xr r r
H s z!Name.__init__..rR N)r3 rZ __setattr__tuplerW rR )r" rR )r5 r r r# C s z
Name.__init__c C s t dd S )Nz+object doesn't support attribute assignment) TypeError)r" namevaluer r r r^ L s zName.__setattr__c C s
t | jS )N)rZ rR )r" r r r __copy__O s z
Name.__copy__c C s t tj| j|S )N)rZ copydeepcopyrR )r" memor r r __deepcopy__R s zName.__deepcopy__c C s
d| j iS )NrR )rR )r" r r r __getstate__U s zName.__getstate__c s$ t t| jd|d t| j d S )NrR )r3 rZ r^ rW rR )r" state)r5 r r __setstate__X s zName.__setstate__c C s t | jdko| jd dkS )zXIs the most significant label of this name the root label?
@rtype: bool
r r r7 rP )rQ rR )r" r r r is_absolute\ s zName.is_absolutec C s t | jdko| jd dkS )z\Is this name wild? (I.e. Is the least significant label '*'?)
@rtype: bool
r *)rQ rR )r" r r r is_wildc s z Name.is_wildc C sJ t d}x4| jD ]*}x$t|j D ]}||d> | 7 }q"W qW t|t S )zHReturn a case-insensitive hash of the name.
@rtype: int
r r )r rR rI r$ intmaxint)r" hr& r* r r r __hash__j s
z
Name.__hash__c
C s* | j }|j }||kr0|r&tddfS tddfS t| j}t|j}|| }|dk rZ|}n|}d}d} t}
x|dkr|d8 }|d8 }|d8 }| j| j } |j| j } | | k rd}| dkrt}
|
|| fS | | krd}| dkrt}
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|
|| fS )a Compare two names, returning a 3-tuple (relation, order, nlabels).
I{relation} describes the relation ship between the names,
and is one of: dns.name.NAMERELN_NONE,
dns.name.NAMERELN_SUPERDOMAIN, dns.name.NAMERELN_SUBDOMAIN,
dns.name.NAMERELN_EQUAL, or dns.name.NAMERELN_COMMONANCESTOR
I{order} is < 0 if self < other, > 0 if self > other, and ==
0 if self == other. A relative name is always less than an
absolute name. If both names have the same relativity, then
the DNSSEC order relation is used to order them.
I{nlabels} is the number of significant labels that the two names
have in common.
r r rP rP ) rk
NAMERELN_NONErQ rR r$ NAMERELN_COMMONANCESTORNAMERELN_SUPERDOMAINNAMERELN_SUBDOMAINNAMERELN_EQUAL)
r" otherZsabsZoabsl1l2ZldiffrS orderZnlabelsZnamerelnZlabel1Zlabel2r r r fullcompareu sN
zName.fullcomparec C s( | j |\}}}|tks |tkr$dS dS )zoIs self a subdomain of other?
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TF)r{ ru rv )r" rw nronlr r r is_subdomain s zName.is_subdomainc C s( | j |\}}}|tks |tkr$dS dS )zqIs self a superdomain of other?
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TF)r{ rt rv )r" rw r| r} r~ r r r is_superdomain s zName.is_superdomainc C s t dd | jD S )zReturn a name which is equal to the current name, but is in
DNSSEC canonical form.
@rtype: dns.name.Name object
c S s g | ] }|j qS r )r$ )r[ r\ r r r r] s z%Name.canonicalize..)rZ rR )r" r r r canonicalize s zName.canonicalizec C s$ t |tr | j|d dkS dS d S )Nr r F)rG rZ r{ )r" rw r r r __eq__ s
z Name.__eq__c C s$ t |tr | j|d dkS dS d S )Nr r T)rG rZ r{ )r" rw r r r __ne__ s
z Name.__ne__c C s$ t |tr | j|d dk S tS d S )Nr r )rG rZ r{ NotImplemented)r" rw r r r __lt__ s
z Name.__lt__c C s$ t |tr | j|d dkS tS d S )Nr r )rG rZ r{ r )r" rw r r r __le__ s
z Name.__le__c C s$ t |tr | j|d dkS tS d S )Nr r )rG rZ r{ r )r" rw r r r __ge__ s
z Name.__ge__c C s$ t |tr | j|d dkS tS d S )Nr r )rG rZ r{ r )r" rw r r r __gt__ s
z Name.__gt__c C s d| j d S )Nz
)__str__)r" r r r __repr__ s z
Name.__repr__c C s
| j dS )NF)to_text)r" r r r r s z Name.__str__Fc C sp t | jdkrtdS t | jdkr:| jd dkr:tdS |rV| j rV| jdd }n| j}djtt|}|S ) zConvert name to text format.
@param omit_final_dot: If True, don't emit the final dot (denoting the
root label) for absolute names. The default is False.
@rtype: string
r @r r7 .N.rP )rQ rR r rk joinmapr0 )r" omit_final_dotrS sr r r r s z Name.to_textNc sx t | jdkrdS t | jdkr2| jd dkr2dS |rN| j rN| jdd }n| j} dkr`t dj fdd|D S )
a Convert name to Unicode text format.
IDN ACE labels are converted to Unicode.
@param omit_final_dot: If True, don't emit the final dot (denoting the
root label) for absolute names. The default is False.
@type omit_final_dot: bool
@param idna_codec: IDNA encoder/decoder. If None, the
IDNA_2003_Practical encoder/decoder is used. The IDNA_2003_Practical
decoder does not impose any policy, it just decodes punycode, so if
you don't want checking for compliance, you can use this decoder for
IDNA2008 as well.
@type idna_codec: dns.name.IDNA
@rtype: string
r @r r7 r Nc s g | ]} j |qS r )r. )r[ r\ )
idna_codecr r r] ) s z#Name.to_unicode..rP )rQ rR rk IDNA_2003_Practicalr )r" r r rS r )r r
to_unicode s zName.to_unicodec C sX | j s:|dks|j r tt| j}|jt|j n| j}dd |D }dj|S )a Convert name to a format suitable for digesting in hashes.
The name is canonicalized and converted to uncompressed wire format.
@param origin: If the name is relative and origin is not None, then
origin will be appended to it.
@type origin: dns.name.Name object
@raises NeedAbsoluteNameOrOrigin: All names in wire format are
absolute. If self is a relative name, then an origin must be supplied;
if it is missing, then this exception is raised
@rtype: string
Nc S s* g | ]"}t jd t| t||j qS )z!B%ds)structpackrQ r$ )r[ r\ r r r r] @ s z&Name.to_digestable..r7 )rk r listrR extendr )r" originrR Zdlabelsr r r
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C s. |dkrt }d}nd}| j sR|dks2|j r6tt| j}|jt|j n| j}d}x|D ]}t||d }|d7 }|dk r|j|} nd} | dk rd| }
tj d|
} |j
| P qb|dk rt |dkr|j } | dkr| ||< t |} |j
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S dS )
a Convert name to wire format, possibly compressing it.
@param file: the file where the name is emitted (typically
a BytesIO file). If None, a string containing the wire name
will be returned.
@type file: file or None
@param compress: The compression table. If None (the default) names
will not be compressed.
@type compress: dict
@param origin: If the name is relative and origin is not None, then
origin will be appended to it.
@type origin: dns.name.Name object
@raises NeedAbsoluteNameOrOrigin: All names in wire format are
absolute. If self is a relative name, then an origin must be supplied;
if it is missing, then this exception is raised
NTFr r i z!Hi? z!B)r rk r r rR r rZ getr r writerQ tellgetvalue)
r" filecompressr Z want_returnrR rU r& nposrb r rS r r r to_wireD s@
z Name.to_wirec C s
t | jS )z@The length of the name (in labels).
@rtype: int
)rQ rR )r" r r r __len__| s z Name.__len__c C s
| j | S )N)rR )r" indexr r r __getitem__ s zName.__getitem__c C s
| j |S )N) concatenate)r" rw r r r __add__ s z Name.__add__c C s
| j |S )N)
relativize)r" rw r r r __sub__ s z Name.__sub__c C sn t | j}|dkr | tjjfS ||kr2tjj| fS |dk sB||krJtdt| d| t| | d fS )a( Split a name into a prefix and suffix at depth.
@param depth: the number of labels in the suffix
@type depth: int
@raises ValueError: the depth was not >= 0 and <= the length of the
name.
@returns: the tuple (prefix, suffix)
@rtype: tuple
r z0depth must be >= 0 and <= the length of the nameN)rQ rR dnsra emptyrX rZ )r" depthrS r r r split s
z
Name.splitc C s: | j rt|dkrtt| j}|jt|j t|S )zReturn a new name which is the concatenation of self and other.
@rtype: dns.name.Name object
@raises AbsoluteConcatenation: self is absolute and other is
not the empty name
r )rk rQ r r rR r rZ )r" rw rR r r r r s
zName.concatenatec C s0 |dk r(| j |r(t| dt| S | S dS )zIf self is a subdomain of origin, return a new name which is self
relative to origin. Otherwise return self.
@rtype: dns.name.Name object
N)r rZ rQ )r" r r r r r s zName.relativizec C s | j s| j|S | S dS )zIf self is a relative name, return a new name which is the
concatenation of self and origin. Otherwise return self.
@rtype: dns.name.Name object
N)rk r )r" r r r r derelativize s
zName.derelativizeTc C s& |r |r| j |S | j|S n| S dS )a Return a name with the relativity desired by the caller. If
origin is None, then self is returned. Otherwise, if
relativize is true the name is relativized, and if relativize is
false the name is derelativized.
@rtype: dns.name.Name object
N)r r )r" r r r r r choose_relativity s
zName.choose_relativityc C s& | t ks| tkrtt| jdd S )zReturn the parent of the name.
@rtype: dns.name.Name object
@raises NoParent: the name is either the root name or the empty name,
and thus has no parent.
r N)rootr r rZ rR )r" r r r parent s z Name.parent)F)FN)N)NNN)NT))r r r r __slots__r# r^ rc rg rh rj rk rm rq r{ r r r r r r r r r r r r r r r r r r r r r r r r r r; r r )r5 r rZ 7 sJ =
8
rZ r7 c C s t | tstd|dkp"t |ts,tdg }d}d}d}d}|dkrLt}| dkrXd} | rz| dkrptd gS x| D ]}|r|dkr|j rt|}|d
7 }q||7 }d}n@|j st|d 9 }|t|7 }|d
7 }|d krd}|t|7 }qv|dkr"t |dkr t
|j |j | d}qv|dkr:d}d}d}qv||7 }qvW |rPtt |dkrp|j |j | n
|j d t |dks|d d kr|dk r|j
t|j t|S )a Convert unicode text into a Name object.
Labels are encoded in IDN ACE form.
@param text: The text to convert into a name.
@type text: Unicode string
@param origin: The origin to append to non-absolute names.
@type origin: dns.name.Name
@param idna_codec: IDNA encoder/decoder. If None, the default IDNA 2003
encoder/decoder is used.
@type idna_codec: dns.name.IDNA
@rtype: dns.name.Name object
z0input to from_unicode() must be a unicode stringNz origin must be a Name or Noner6 Fr r r r7 r
r 。 ． ｡rD T)r r r r rP )rG r rX rZ IDNA_2003isdigitrn r r rQ r appendr- r r rR ) rM r r rR r& escapingedigitsrT r* r r r from_unicode sd
&r c
C s t | trt| ||S t | ts(td|dkp8t |tsBtdg }d}d}d}d}| dkrbd} | r| dkrztdgS xt| D ]}tjd |} |r|dkr| j rt
| }|d
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7 }|d kr^d}|tjd |7 }q| dkr>t |dkr.t
|j| d}q| d
krVd}d}d}q|| 7 }qW |rlt t |dkr|j| n
|jd t |dks|d dkr|dk r|jt|j t|S )a} Convert text into a Name object.
@param text: The text to convert into a name.
@type text: string
@param origin: The origin to append to non-absolute names.
@type origin: dns.name.Name
@param idna_codec: IDNA encoder/decoder. If None, the default IDNA 2003
encoder/decoder is used.
@type idna_codec: dns.name.IDNA
@rtype: dns.name.Name object
z%input to from_text() must be a stringNz origin must be a Name or Noner7 Fr r r z!Br r r \TrP )rG r r r rX rZ rI r r r rn r rQ r r r r rR )
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&r c C s t | tstdtjj| } g }|}d}| | }|d7 }d}x|dkr|dk r|j| ||| j ||7 }|dkr||7 }nJ|dkr|d@ d | | }|dkr|d7 }||krt|}|d7 }nt | | }|d7 }|dkr@|d7 }q@W |jd t
||fS ) a^ Convert possibly compressed wire format into a Name.
@param message: the entire DNS message
@type message: string
@param current: the offset of the beginning of the name from the start
of the message
@type current: int
@raises dns.name.BadPointer: a compression pointer did not point backwards
in the message
@raises dns.name.BadLabelType: an invalid label type was encountered.
@returns: a tuple consisting of the name that was read and the number
of bytes of the wire format message which were consumed reading it
@rtype: (dns.name.Name object, int) tuple
z*input to from_wire() must be a byte stringr r @ rN r6 ) rG r rX r ZwiredataZ
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