a PҚh@sdZddlZddlZddlmZmZddlZddlZe dZ e e dddZ e dZe d Ze d Zdee e fee d d dZdZe edddZee e fe dddZdS)zIPv6 helper functions.N)ListUnionz 0+([0-9a-f]+))addressreturncCst|dkrtdt|}g}d}t|}||krz|||d}t|}|durf|d}|||d7}q.d}d}d} d} t d D]B}||d kr| r|} | | } | |kr| }| }d} q| s|} d } q| rd } | | } | |kr| }| }|dkr|dkrZ|d ks,|d krZ|d dkrZ|d krt| } | dkrtjj| dkrdd| | } | | q|dkr$|s$tjjd| }z t|WStjtfy\tjjYn0dS)a+Convert an IPv6 address in text form to binary form. *text*, a ``str`` or ``bytes``, the IPv6 address in textual form. *ignore_scope*, a ``bool``. If ``True``, a scope will be ignored. If ``False``, the default, it is an error for a scope to be present. Returns a ``bytes``. %r:s::s0::Nrr02xr r FTs0000r0) isinstancebytesencodesplitrr exception SyntaxErrorendswith startswith _v4_endingrr inet_atonrr_colon_colon_start_colon_colon_endrrrr unhexlifyError TypeError) r)r*Zbtextpartsr!r#brZ seen_empty canonicalc_lcr'r'r(r;hsn         <            r;s cCs |tS)zIs the specified address a mapped IPv4 address? *address*, a ``bytes`` is an IPv6 address in binary form. Returns a ``bool``. )r9_mapped_prefix)rr'r'r( is_mappedsrH)r)rcCstjtj|S)aVerify that *address* is a valid text form IPv6 address and return its canonical text form. Addresses with scopes are rejected. *text*, a ``str`` or ``bytes``, the IPv6 address in textual form. Raises ``dns.exception.SyntaxError`` if the text is not valid. )rZipv6rr;)r)r'r'r( canonicalizesrI)F)__doc__rretypingrrZ dns.exceptionrZdns.ipv4compilerr3strrr:r<r=boolr;rGrHrIr'r'r'r(s E   [