diff options
Diffstat (limited to 'dns/rdtypes/mxbase.py')
| -rw-r--r-- | dns/rdtypes/mxbase.py | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/dns/rdtypes/mxbase.py b/dns/rdtypes/mxbase.py index 1f4ad32..3372060 100644 --- a/dns/rdtypes/mxbase.py +++ b/dns/rdtypes/mxbase.py @@ -15,6 +15,7 @@ """MX-like base classes.""" +import cStringIO import struct import dns.exception @@ -30,7 +31,7 @@ class MXBase(dns.rdata.Rdata): @type exchange: dns.name.Name object""" __slots__ = ['preference', 'exchange'] - + def __init__(self, rdclass, rdtype, preference, exchange): super(MXBase, self).__init__(rdclass, rdtype) self.preference = preference @@ -39,21 +40,25 @@ class MXBase(dns.rdata.Rdata): def to_text(self, origin=None, relativize=True, **kw): exchange = self.exchange.choose_relativity(origin, relativize) return '%d %s' % (self.preference, exchange) - + def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True): preference = tok.get_uint16() exchange = tok.get_name() exchange = exchange.choose_relativity(origin, relativize) tok.get_eol() return cls(rdclass, rdtype, preference, exchange) - + from_text = classmethod(from_text) def to_wire(self, file, compress = None, origin = None): pref = struct.pack("!H", self.preference) file.write(pref) self.exchange.to_wire(file, compress, origin) - + + def to_digestable(self, origin = None): + return struct.pack("!H", self.preference) + \ + self.exchange.to_digestable(origin) + def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None): (preference, ) = struct.unpack('!H', wire[current : current + 2]) current += 2 @@ -70,7 +75,7 @@ class MXBase(dns.rdata.Rdata): def choose_relativity(self, origin = None, relativize = True): self.exchange = self.exchange.choose_relativity(origin, relativize) - + def _cmp(self, other): sp = struct.pack("!H", self.preference) op = struct.pack("!H", other.preference) @@ -81,7 +86,20 @@ class MXBase(dns.rdata.Rdata): class UncompressedMX(MXBase): """Base class for rdata that is like an MX record, but whose name - is not compressed when convert to DNS wire format.""" + is not compressed when converted to DNS wire format, and whose + digestable form is not downcased.""" def to_wire(self, file, compress = None, origin = None): super(UncompressedMX, self).to_wire(file, None, origin) + + def to_digestable(self, origin = None): + f = cStringIO.StringIO() + self.to_wire(f, None, origin) + return f.getvalue() + +class UncompressedDowncasingMX(MXBase): + """Base class for rdata that is like an MX record, but whose name + is not compressed when convert to DNS wire format.""" + + def to_wire(self, file, compress = None, origin = None): + super(UncompressedDowncasingMX, self).to_wire(file, None, origin) |