Your IP : 13.59.83.202
3
�b�W� � @ s� d Z ddlZddlZddlZddlZddlmZmZm Z ej
d�Zdd� Zej
d�Z
ej
d �Zej
d
�Zdd� ZdZdd� ZdS )zIPv6 helper functions.� N� )�xrange�binary_type�maybe_decodes
0+([0-9a-f]+)c C s� t | �dkrtd��tj| �}g }d}t |�}xJ||k rx|||d � }tj|�}|dk rd|jd�}|j|� |d7 }q0W d}d}d} d}
xNtd�D ]B}|| d kr�|
r�|}|| }||kr�| }|}d}
q�|
s�|} d
}
q�W |
� r�d}|| }||k� r�| }|}|dk�r�|dk�rb|dk�s4|dk�rb|d d
k�rb|dk�rDd}
nd}
|
t j
j| dd� � }n,dj|d|� �d dj||| d� � }n
dj|�}t
|�S )z�Convert a network format IPv6 address into text.
@param address: the binary address
@type address: string
@rtype: string
@raises ValueError: the address isn't 16 bytes long
� z IPv6 addresses are 16 bytes longr � Nr F� � 0T� � s ffffs ::s ::ffff:� � :���)�len�
ValueError�binasciiZhexlify�
_leading_zero�match�group�appendr �dns�ipv4� inet_ntoa�joinr )�address�hex�chunks�i�l�chunk�mZ
best_startZbest_len�startZ
last_was_zero�endZcurrent_len�prefix� r$ �/usr/lib/python3.6/ipv6.pyr s^
r s (.*):(\d+\.\d+\.\d+\.\d+)$s ::.*s .*::$c
C s� t | t�s| j� } | dkrd} tj| �}|dk rvttjj|j d���}d|j d�j
� |d |d |d |d f j� } tj| �}|dk r�| dd� } ntj| �}|dk r�| dd� } | j
d �}t|�}|d
kr�tjj�d}g }x�|D ]�}|dk�r.|�r tjj�d
}xftdd
| d �D ]}|jd� �qW q�t|�} | dk�rHtjj�| dk�rbdd| | }|j|� q�W |d
k �r�| �r�tjj�dj|�} y
tj| �S tjtfk
�r� tjj�Y nX dS )z�Convert a text format IPv6 address into network format.
@param text: the textual address
@type text: string
@rtype: string
@raises dns.exception.SyntaxError: the text was not properly formatted
s ::s 0::N� z%s:%02x%02x:%02x%02xr r � r
r F� Ts 0000r r r )�
isinstancer �encode�
_v4_endingr � bytearrayr r � inet_atonr �decode�_colon_colon_start�_colon_colon_end�splitr Z exception�SyntaxErrorr r r r Z unhexlify�Error� TypeError)
�textr �br r Z
seen_emptyZ canonical�cr Zlcr$ r$ r% r- b sR
r- � �
s ��c C s
| j t�S )N)�
startswith�_mapped_prefix)r r$ r$ r% � is_mapped� s r<