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.. _message-flags:
Message Flags
=============
DNS message flags are used for signalling of various kinds
in the DNS protocol. For example, the ``QR`` flag indicates
that a message is a response to a prior query.
Messages flags are encoded in two locations: the DNS header
and the EDNS flags field.
Header Flags
------------
.. autodata:: dns.flags.QR
.. autodata:: dns.flags.AA
.. autodata:: dns.flags.TC
.. autodata:: dns.flags.RD
.. autodata:: dns.flags.RA
.. autodata:: dns.flags.AD
.. autodata:: dns.flags.CD
.. autofunction:: dns.flags.from_text
.. autofunction:: dns.flags.to_text
EDNS Flags
----------
.. autodata:: dns.flags.DO
.. autofunction:: dns.flags.edns_from_text
.. autofunction:: dns.flags.edns_to_text
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