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\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// # Copyright (C) 2001-2007, 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 nodes. A node is a set of rdatasets.""" import StringIO import dns.rdataset import dns.rdatatype import dns.renderer class Node(object): """A DNS node. A node is a set of rdatasets @ivar rdatasets: the node's rdatasets @type rdatasets: list of dns.rdataset.Rdataset objects""" __slots__ = ['rdatasets'] def __init__(self): """Initialize a DNS node. """ self.rdatasets = []; def to_text(self, name, **kw): """Convert a node to text format. Each rdataset at the node is printed. Any keyword arguments to this method are passed on to the rdataset's to_text() method. @param name: the owner name of the rdatasets @type name: dns.name.Name object @rtype: string """ s = StringIO.StringIO() for rds in self.rdatasets: if len(rds) > 0: print >> s, rds.to_text(name, **kw) return s.getvalue()[:-1] def __repr__(self): return '' def __eq__(self, other): """Two nodes are equal if they have the same rdatasets. @rtype: bool """ # # This is inefficient. Good thing we don't need to do it much. # for rd in self.rdatasets: if rd not in other.rdatasets: return False for rd in other.rdatasets: if rd not in self.rdatasets: return False return True def __ne__(self, other): return not self.__eq__(other) def __len__(self): return len(self.rdatasets) def __iter__(self): return iter(self.rdatasets) def find_rdataset(self, rdclass, rdtype, covers=dns.rdatatype.NONE, create=False): """Find an rdataset matching the specified properties in the current node. @param rdclass: The class of the rdataset @type rdclass: int @param rdtype: The type of the rdataset @type rdtype: int @param 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 @param create: If True, create the rdataset if it is not found. @type create: bool @raises KeyError: An rdataset of the desired type and class does not exist and I{create} is not True. @rtype: dns.rdataset.Rdataset object """ for rds in self.rdatasets: if rds.match(rdclass, rdtype, covers): return rds if not create: raise KeyError rds = dns.rdataset.Rdataset(rdclass, rdtype) self.rdatasets.append(rds) return rds def get_rdataset(self, rdclass, rdtype, covers=dns.rdatatype.NONE, create=False): """Get an rdataset matching the specified properties in the current node. None is returned if an rdataset of the specified type and class does not exist and I{create} is not True. @param rdclass: The cl