diff options
Diffstat (limited to 'third_party/dnspython/dns/rdtypes/IN/SRV.py')
-rw-r--r-- | third_party/dnspython/dns/rdtypes/IN/SRV.py | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/third_party/dnspython/dns/rdtypes/IN/SRV.py b/third_party/dnspython/dns/rdtypes/IN/SRV.py new file mode 100644 index 00000000000..e101b26beae --- /dev/null +++ b/third_party/dnspython/dns/rdtypes/IN/SRV.py @@ -0,0 +1,89 @@ +# Copyright (C) 2003-2007, 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. + +import struct + +import dns.exception +import dns.rdata +import dns.name + +class SRV(dns.rdata.Rdata): + """SRV record + + @ivar priority: the priority + @type priority: int + @ivar weight: the weight + @type weight: int + @ivar port: the port of the service + @type port: int + @ivar target: the target host + @type target: dns.name.Name object + @see: RFC 2782""" + + __slots__ = ['priority', 'weight', 'port', 'target'] + + def __init__(self, rdclass, rdtype, priority, weight, port, target): + super(SRV, self).__init__(rdclass, rdtype) + self.priority = priority + self.weight = weight + self.port = port + self.target = target + + def to_text(self, origin=None, relativize=True, **kw): + target = self.target.choose_relativity(origin, relativize) + return '%d %d %d %s' % (self.priority, self.weight, self.port, + target) + + def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True): + priority = tok.get_uint16() + weight = tok.get_uint16() + port = tok.get_uint16() + target = tok.get_name(None) + target = target.choose_relativity(origin, relativize) + tok.get_eol() + return cls(rdclass, rdtype, priority, weight, port, target) + + from_text = classmethod(from_text) + + def to_wire(self, file, compress = None, origin = None): + three_ints = struct.pack("!HHH", self.priority, self.weight, self.port) + file.write(three_ints) + self.target.to_wire(file, compress, origin) + + def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None): + (priority, weight, port) = struct.unpack('!HHH', + wire[current : current + 6]) + current += 6 + rdlen -= 6 + (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, priority, weight, port, 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): + sp = struct.pack("!HHH", self.priority, self.weight, self.port) + op = struct.pack("!HHH", other.priority, other.weight, other.port) + v = cmp(sp, op) + if v == 0: + v = cmp(self.target, other.target) + return v |