diff options
Diffstat (limited to 'source4/scripting/python/samba_external/dnspython/dns/rdtypes/txtbase.py')
-rw-r--r-- | source4/scripting/python/samba_external/dnspython/dns/rdtypes/txtbase.py | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/source4/scripting/python/samba_external/dnspython/dns/rdtypes/txtbase.py b/source4/scripting/python/samba_external/dnspython/dns/rdtypes/txtbase.py new file mode 100644 index 0000000000..43db2a48c0 --- /dev/null +++ b/source4/scripting/python/samba_external/dnspython/dns/rdtypes/txtbase.py @@ -0,0 +1,87 @@ +# Copyright (C) 2006, 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. + +"""TXT-like base class.""" + +import dns.exception +import dns.rdata +import dns.tokenizer + +class TXTBase(dns.rdata.Rdata): + """Base class for rdata that is like a TXT record + + @ivar strings: the text strings + @type strings: list of string + @see: RFC 1035""" + + __slots__ = ['strings'] + + def __init__(self, rdclass, rdtype, strings): + super(TXTBase, self).__init__(rdclass, rdtype) + if isinstance(strings, str): + strings = [ strings ] + self.strings = strings[:] + + def to_text(self, origin=None, relativize=True, **kw): + txt = '' + prefix = '' + for s in self.strings: + txt += '%s"%s"' % (prefix, dns.rdata._escapify(s)) + prefix = ' ' + return txt + + def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True): + strings = [] + while 1: + token = tok.get().unescape() + if token.is_eol_or_eof(): + break + if not (token.is_quoted_string() or token.is_identifier()): + raise dns.exception.SyntaxError("expected a string") + if len(token.value) > 255: + raise dns.exception.SyntaxError("string too long") + strings.append(token.value) + if len(strings) == 0: + raise dns.exception.UnexpectedEnd + return cls(rdclass, rdtype, strings) + + from_text = classmethod(from_text) + + def to_wire(self, file, compress = None, origin = None): + for s in self.strings: + l = len(s) + assert l < 256 + byte = chr(l) + file.write(byte) + file.write(s) + + def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None): + strings = [] + while rdlen > 0: + l = ord(wire[current]) + current += 1 + rdlen -= 1 + if l > rdlen: + raise dns.exception.FormError + s = wire[current : current + l] + current += l + rdlen -= l + strings.append(s) + return cls(rdclass, rdtype, strings) + + from_wire = classmethod(from_wire) + + def _cmp(self, other): + return cmp(self.strings, other.strings) |