a sd_@sndZddlZddlZddlZddlZedZddZedZ edZ edZ dd d Z d Z d dZdS)zIPv6 helper functions.Nz 0+([0-9a-f]+)cCst|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| } | dkrxtjj| dkrdd| | } || q|d kr|stjjd|}z t|WStjtfytjjYn0dS)aConvert an IPv6 address in text form to binary form. *text*, a ``str``, 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``. %rs::s0::Nz{}:{:02x}{:02x}:{:02x}{:02x}rr:rFTs0000r0) isinstancebytesencodesplitr rZ exception SyntaxError _v4_endingrr inet_atonrformatr_colon_colon_start_colon_colon_endrrrrZ unhexlifyError TypeError) textZ ignore_scopepartsrrbrZ seen_emptyZ canonicalcrZlcr#r#r$r1csd              r1s cCs |tS)zIs the specified address a mapped IPv4 address? *address*, a ``bytes`` is an IPv6 address in binary form. Returns a ``bool``. ) startswith_mapped_prefix)rr#r#r$ is_mappedsr=)F)__doc__rerZ dns.exceptionrZdns.ipv4compilerrr0r3r4r1r<r=r#r#r#r$s C    R