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# Copyright (C) 2003-2007, 2009, 2010 Nominum, Inc.
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# Permission to use, copy, modify, and distribute this software and its
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# documentation for any purpose with or without fee is hereby granted,
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# provided that the above copyright notice and this permission notice
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# appear in all copies.
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# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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class NXT(dns.rdata.Rdata):
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@ivar next: the next name
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@type next: dns.name.Name object
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@ivar bitmap: the type bitmap
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__slots__ = ['next', 'bitmap']
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def __init__(self, rdclass, rdtype, next, bitmap):
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super(NXT, self).__init__(rdclass, rdtype)
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def to_text(self, origin=None, relativize=True, **kw):
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next = self.next.choose_relativity(origin, relativize)
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for i in xrange(0, len(self.bitmap)):
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byte = ord(self.bitmap[i])
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for j in xrange(0, 8):
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if byte & (0x80 >> j):
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bits.append(dns.rdatatype.to_text(i * 8 + j))
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return '%s %s' % (next, text)
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def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True):
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next = next.choose_relativity(origin, relativize)
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bitmap = ['\x00', '\x00', '\x00', '\x00',
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'\x00', '\x00', '\x00', '\x00',
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'\x00', '\x00', '\x00', '\x00',
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'\x00', '\x00', '\x00', '\x00' ]
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token = tok.get().unescape()
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if token.is_eol_or_eof():
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if token.value.isdigit():
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nrdtype = int(token.value)
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nrdtype = dns.rdatatype.from_text(token.value)
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raise dns.exception.SyntaxError("NXT with bit 0")
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raise dns.exception.SyntaxError("NXT with bit > 127")
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bitmap[i] = chr(ord(bitmap[i]) | (0x80 >> (nrdtype % 8)))
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bitmap = dns.rdata._truncate_bitmap(bitmap)
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return cls(rdclass, rdtype, next, bitmap)
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from_text = classmethod(from_text)
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def to_wire(self, file, compress = None, origin = None):
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self.next.to_wire(file, None, origin)
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file.write(self.bitmap)
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def to_digestable(self, origin = None):
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return self.next.to_digestable(origin) + self.bitmap
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def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None):
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(next, cused) = dns.name.from_wire(wire[: current + rdlen], current)
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bitmap = wire[current : current + rdlen]
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if not origin is None:
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next = next.relativize(origin)
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return cls(rdclass, rdtype, next, bitmap)
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from_wire = classmethod(from_wire)
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def choose_relativity(self, origin = None, relativize = True):
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self.next = self.next.choose_relativity(origin, relativize)
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def _cmp(self, other):
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v = cmp(self.next, other.next)
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v = cmp(self.bitmap, other.bitmap)