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author | Jelmer Vernooij <jelmer@samba.org> | 2010-03-29 16:08:11 +0200 |
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committer | Jelmer Vernooij <jelmer@samba.org> | 2010-03-29 18:05:29 +0200 |
commit | 4bbc3ff037026c72f3249f59c1b5af69a6ad6d69 (patch) | |
tree | 125857a1edbf3246579e51b10f6e62ec875062bc /lib/dnspython/dns/rdtypes/nsbase.py | |
parent | 89aa3b766b926d19dac4805a7e72433e497ce872 (diff) | |
download | samba-4bbc3ff037026c72f3249f59c1b5af69a6ad6d69.tar.gz samba-4bbc3ff037026c72f3249f59c1b5af69a6ad6d69.tar.bz2 samba-4bbc3ff037026c72f3249f59c1b5af69a6ad6d69.zip |
s4-python: Move dnspython to lib/, like the other Python modules
This also avoids it from being installed if it's already present on the
system.
Diffstat (limited to 'lib/dnspython/dns/rdtypes/nsbase.py')
-rw-r--r-- | lib/dnspython/dns/rdtypes/nsbase.py | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/lib/dnspython/dns/rdtypes/nsbase.py b/lib/dnspython/dns/rdtypes/nsbase.py new file mode 100644 index 0000000000..7cdb2a0289 --- /dev/null +++ b/lib/dnspython/dns/rdtypes/nsbase.py @@ -0,0 +1,82 @@ +# Copyright (C) 2003-2007, 2009, 2010 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. + +"""NS-like base classes.""" + +import cStringIO + +import dns.exception +import dns.rdata +import dns.name + +class NSBase(dns.rdata.Rdata): + """Base class for rdata that is like an NS record. + + @ivar target: the target name of the rdata + @type target: dns.name.Name object""" + + __slots__ = ['target'] + + def __init__(self, rdclass, rdtype, target): + super(NSBase, self).__init__(rdclass, rdtype) + self.target = target + + def to_text(self, origin=None, relativize=True, **kw): + target = self.target.choose_relativity(origin, relativize) + return str(target) + + def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True): + target = tok.get_name() + target = target.choose_relativity(origin, relativize) + tok.get_eol() + return cls(rdclass, rdtype, target) + + from_text = classmethod(from_text) + + def to_wire(self, file, compress = None, origin = None): + self.target.to_wire(file, compress, origin) + + def to_digestable(self, origin = None): + return self.target.to_digestable(origin) + + def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None): + (target, cused) = dns.name.from_wire(wire[: current + rdlen], + current) + if cused != rdlen: + raise dns.exception.FormError + if not origin is None: + target = target.relativize(origin) + return cls(rdclass, rdtype, target) + + from_wire = classmethod(from_wire) + + def choose_relativity(self, origin = None, relativize = True): + self.target = self.target.choose_relativity(origin, relativize) + + def _cmp(self, other): + return cmp(self.target, other.target) + +class UncompressedNS(NSBase): + """Base class for rdata that is like an NS record, but whose name + is not compressed when convert to DNS wire format, and whose + digestable form is not downcased.""" + + def to_wire(self, file, compress = None, origin = None): + super(UncompressedNS, self).to_wire(file, None, origin) + + def to_digestable(self, origin = None): + f = cStringIO.StringIO() + self.to_wire(f, None, origin) + return f.getvalue() |