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S ) z EDNS Options� c @ sd e Zd ZdZdd� Zdd� Zedd� �Zdd � Zd
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dd� ZdS )�Optionz*Base class for all EDNS option types.
c C s
|| _ dS )z\Initialize an option.
@param otype: The rdata type
@type otype: int
N)�otype)�selfr � r �/usr/lib/python3.6/edns.py�__init__ s zOption.__init__c C s t �dS )z*Convert an option to wire format.
N)�NotImplementedError)r �filer r r �to_wire! s zOption.to_wirec C s t �dS )a� Build an EDNS option object from wire format
@param otype: The option type
@type otype: int
@param wire: The wire-format message
@type wire: string
@param current: The offset in wire of the beginning of the rdata.
@type current: int
@param olen: The length of the wire-format option data
@type olen: int
@rtype: dns.edns.Option instanceN)r )�clsr �wire�current�olenr r r � from_wire& s
zOption.from_wirec C s t �dS )z�Compare an EDNS option with another option of the same type.
Return < 0 if self < other, 0 if self == other,
and > 0 if self > other.
N)r )r �otherr r r �_cmp5 s z Option._cmpc C s, t |t�sdS | j|jkr dS | j|�dkS )NF� )�
isinstancer r r )r r r r r �__eq__< s
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Option.__eq__c C s, t |t�sdS | j|jkr dS | j|�dkS )NFr )r r r r )r r r r r �__ne__C s
z
Option.__ne__c C s* t |t� s| j|jkr tS | j|�dk S )Nr )r r r �NotImplementedr )r r r r r �__lt__J s z
Option.__lt__c C s* t |t� s| j|jkr tS | j|�dkS )Nr )r r r r r )r r r r r �__le__P s z
Option.__le__c C s* t |t� s| j|jkr tS | j|�dkS )Nr )r r r r r )r r r r r �__ge__V s z
Option.__ge__c C s* t |t� s| j|jkr tS | j|�dkS )Nr )r r r r r )r r r r r �__gt__\ s z
Option.__gt__N)�__name__�
__module__� __qualname__�__doc__r r
� classmethodr r r r r r r r r r r r r s r c s< e Zd ZdZ� fdd�Zdd� Zedd� �Zdd � Z� Z S )
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GenericOptionzwGenerate Rdata Class
This class is used for EDNS option types for which we have no better
implementation.
c s t t| �j|� || _d S )N)�superr r �data)r r r" )� __class__r r r k s zGenericOption.__init__c C s |j | j� d S )N)�writer" )r r r r r r
o s zGenericOption.to_wirec C s | ||||| � �S )Nr )r r r r
r r r r r r s zGenericOption.from_wirec C s$ | j |j krdS | j |j kr dS dS )Nr � ���)r" )r r r r r r v s
zGenericOption._cmp)
r r r r r r
r r r �
__classcell__r r )r# r r c s
r c C s t j| �}|d krt}|S )N)�_type_to_class�getr )r r r r r �get_option_class� s
r* c C s t | �}|j| |||�S )au Build an EDNS option object from wire format
@param otype: The option type
@type otype: int
@param wire: The wire-format message
@type wire: string
@param current: The offset in wire of the beginning of the rdata.
@type current: int
@param olen: The length of the wire-format option data
@type olen: int
@rtype: dns.edns.Option instance)r* r )r r r
r r r r r �option_from_wire� s
r+ N)r ZNSID�objectr r r( r* r+ r r r r �<module> s N