+++ /dev/null
-# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
-#
-# Permission to use, copy, modify, and distribute this software and its
-# documentation for any purpose with or without fee is hereby granted,
-# provided that the above copyright notice and this permission notice
-# appear in all copies.
-#
-# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
-# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
-# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
-# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
-"""DNS RRsets (an RRset is a named rdataset)"""
-
-import dns.name
-import dns.rdataset
-import dns.rdataclass
-import dns.renderer
-
-class RRset(dns.rdataset.Rdataset):
- """A DNS RRset (named rdataset).
-
- RRset inherits from Rdataset, and RRsets can be treated as
- Rdatasets in most cases. There are, however, a few notable
- exceptions. RRsets have different to_wire() and to_text() method
- arguments, reflecting the fact that RRsets always have an owner
- name.
- """
-
- __slots__ = ['name', 'deleting']
-
- def __init__(self, name, rdclass, rdtype, covers=dns.rdatatype.NONE,
- deleting=None):
- """Create a new RRset."""
-
- super(RRset, self).__init__(rdclass, rdtype, covers)
- self.name = name
- self.deleting = deleting
-
- def _clone(self):
- obj = super(RRset, self)._clone()
- obj.name = self.name
- obj.deleting = self.deleting
- return obj
-
- def __repr__(self):
- if self.covers == 0:
- ctext = ''
- else:
- ctext = '(' + dns.rdatatype.to_text(self.covers) + ')'
- if not self.deleting is None:
- dtext = ' delete=' + dns.rdataclass.to_text(self.deleting)
- else:
- dtext = ''
- return '<DNS ' + str(self.name) + ' ' + \
- dns.rdataclass.to_text(self.rdclass) + ' ' + \
- dns.rdatatype.to_text(self.rdtype) + ctext + dtext + ' RRset>'
-
- def __str__(self):
- return self.to_text()
-
- def __eq__(self, other):
- """Two RRsets are equal if they have the same name and the same
- rdataset
-
- @rtype: bool"""
- if not isinstance(other, RRset):
- return False
- if self.name != other.name:
- return False
- return super(RRset, self).__eq__(other)
-
- def match(self, name, rdclass, rdtype, covers, deleting=None):
- """Returns True if this rrset matches the specified class, type,
- covers, and deletion state."""
-
- if not super(RRset, self).match(rdclass, rdtype, covers):
- return False
- if self.name != name or self.deleting != deleting:
- return False
- return True
-
- def to_text(self, origin=None, relativize=True, **kw):
- """Convert the RRset into DNS master file format.
-
- @see: L{dns.name.Name.choose_relativity} for more information
- on how I{origin} and I{relativize} determine the way names
- are emitted.
-
- Any additional keyword arguments are passed on to the rdata
- to_text() method.
-
- @param origin: The origin for relative names, or None.
- @type origin: dns.name.Name object
- @param relativize: True if names should names be relativized
- @type relativize: bool"""
-
- return super(RRset, self).to_text(self.name, origin, relativize,
- self.deleting, **kw)
-
- def to_wire(self, file, compress=None, origin=None, **kw):
- """Convert the RRset to wire format."""
-
- return super(RRset, self).to_wire(self.name, file, compress, origin,
- self.deleting, **kw)
-
- def to_rdataset(self):
- """Convert an RRset into an Rdataset.
-
- @rtype: dns.rdataset.Rdataset object
- """
- return dns.rdataset.from_rdata_list(self.ttl, list(self))
-
-
-def from_text_list(name, ttl, rdclass, rdtype, text_rdatas):
- """Create an RRset with the specified name, TTL, class, and type, and with
- the specified list of rdatas in text format.
-
- @rtype: dns.rrset.RRset object
- """
-
- if isinstance(name, (str, unicode)):
- name = dns.name.from_text(name, None)
- if isinstance(rdclass, (str, unicode)):
- rdclass = dns.rdataclass.from_text(rdclass)
- if isinstance(rdtype, (str, unicode)):
- rdtype = dns.rdatatype.from_text(rdtype)
- r = RRset(name, rdclass, rdtype)
- r.update_ttl(ttl)
- for t in text_rdatas:
- rd = dns.rdata.from_text(r.rdclass, r.rdtype, t)
- r.add(rd)
- return r
-
-def from_text(name, ttl, rdclass, rdtype, *text_rdatas):
- """Create an RRset with the specified name, TTL, class, and type and with
- the specified rdatas in text format.
-
- @rtype: dns.rrset.RRset object
- """
-
- return from_text_list(name, ttl, rdclass, rdtype, text_rdatas)
-
-def from_rdata_list(name, ttl, rdatas):
- """Create an RRset with the specified name and TTL, and with
- the specified list of rdata objects.
-
- @rtype: dns.rrset.RRset object
- """
-
- if isinstance(name, (str, unicode)):
- name = dns.name.from_text(name, None)
-
- if len(rdatas) == 0:
- raise ValueError("rdata list must not be empty")
- r = None
- for rd in rdatas:
- if r is None:
- r = RRset(name, rd.rdclass, rd.rdtype)
- r.update_ttl(ttl)
- first_time = False
- r.add(rd)
- return r
-
-def from_rdata(name, ttl, *rdatas):
- """Create an RRset with the specified name and TTL, and with
- the specified rdata objects.
-
- @rtype: dns.rrset.RRset object
- """
-
- return from_rdata_list(name, ttl, rdatas)
git.samba.org / ambi / samba-autobuild / .git / blobdiff