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jj|	d|jd|jd|�}|j|�sot�n|S(	s�Return the response obtained after sending a query via UDP.

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    @param port: The port to which to send the message.  The default is 53.
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    @param ignore_unexpected: If True, ignore responses from unexpected
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j�Xtjj|d|jd|jd|�}|j|�sFt�n|S(sReturn the response obtained after sending a query via TCP.

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    @param timeout: The number of seconds to wait before the query times out.
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    @type timeout: float
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    @type port: int
    @param af: the address family to use.  The default is None, which
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    @type af: int
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    @param source_port: The port from which to send the message.
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kr�tj+j,d��nt}n|tjj	kr�|}n||kr|tjj1ks�|tjj	kr|rt }qq|rtjj1}t}qqW|rC|j'rC|$j2rCtj+j,d��n|$VqJW|j3�dS(s�Return a generator for the responses to a zone transfer.

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    @param rdtype: The type of zone transfer.  The default is
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    @param rdclass: The class of the zone transfer.  The default is
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    @type rdclass: int or string
    @param timeout: The number of seconds to wait for each response message.
    If None, the default, wait forever.
    @type timeout: float
    @param port: The port to which to send the message.  The default is 53.
    @type port: int
    @param keyring: The TSIG keyring to use
    @type keyring: dict
    @param keyname: The name of the TSIG key to use
    @type keyname: dns.name.Name object or string
    @param relativize: If True, all names in the zone will be relativized to
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    the one specified to dns.zone.from_xfr().
    @type relativize: bool
    @param af: the address family to use.  The default is None, which
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    @param lifetime: The total number of seconds to spend doing the transfer.
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    @type lifetime: float
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    @type source_port: int
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    @param use_udp: Use UDP (only meaningful for IXFR)
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