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� Zdd� Zdd� Zdd� ZdS )zHDNS rdatasets (an rdataset is a set of rdatas of a given type and class)� N)�StringIO� )� string_typesc @ s e Zd ZdZdS )�DifferingCoversz~An attempt was made to add a DNS SIG/RRSIG whose covered type
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� fdd�Zdd� Zdd� Z� fdd�Zdd � Zd%d d �Zd&d d!�Zd"d#� Z� ZS )'�Rdataseta� A DNS rdataset.
@ivar rdclass: The class of the rdataset
@type rdclass: int
@ivar rdtype: The type of the rdataset
@type rdtype: int
@ivar covers: The covered type. Usually this value is
dns.rdatatype.NONE, but if the rdtype is dns.rdatatype.SIG or
dns.rdatatype.RRSIG, then the covers value will be the rdata
type the SIG/RRSIG covers. The library treats the SIG and RRSIG
types as if they were a family of
types, e.g. RRSIG(A), RRSIG(NS), RRSIG(SOA). This makes RRSIGs much
easier to work with than if RRSIGs covering different rdata
types were aggregated into a single RRSIG rdataset.
@type covers: int
@ivar ttl: The DNS TTL (Time To Live) value
@type ttl: int
�rdclass�rdtype�covers�ttlc s* t t| �j� || _|| _|| _d| _dS )z�Create a new rdataset of the specified class and type.
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� tt| �j|� dS )a% Add the specified rdata to the rdataset.
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are emitted.
Any additional keyword arguments are passed on to the rdata
to_text() method.
@param name: If name is not None, emit a RRs with I{name} as
the owner name.
@type name: dns.name.Name object
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�|j| d � tjd| | �}|j|� |jdd� q�W t| �S dS ) a, Convert the rdataset to wire format.
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@type name: dns.name.Name object
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@type file: file
@param compress: The compression table to use; the default is None.
@type compress: dict
@param origin: The origin to be appended to any relative names when
they are emitted. The default is None.
@returns: the number of records emitted
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