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# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
# 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.tokenizer
def _validate_float_string(what):
if what[0] == b'-'[0] or what[0] == b'+'[0]:
what = what[1:]
if what.isdigit():
return
(left, right) = what.split(b'.')
if left == b'' and right == b'':
raise dns.exception.FormError
if not left == b'' and not left.decode().isdigit():
raise dns.exception.FormError
if not right == b'' and not right.decode().isdigit():
raise dns.exception.FormError
def _sanitize(value):
if isinstance(value, str):
return value.encode()
return value
class GPOS(dns.rdata.Rdata):
"""GPOS record"""
# see: RFC 1712
__slots__ = ['latitude', 'longitude', 'altitude']
def __init__(self, rdclass, rdtype, latitude, longitude, altitude):
super().__init__(rdclass, rdtype)
if isinstance(latitude, float) or \
isinstance(latitude, int):
latitude = str(latitude)
if isinstance(longitude, float) or \
isinstance(longitude, int):
longitude = str(longitude)
if isinstance(altitude, float) or \
isinstance(altitude, int):
altitude = str(altitude)
latitude = _sanitize(latitude)
longitude = _sanitize(longitude)
altitude = _sanitize(altitude)
_validate_float_string(latitude)
_validate_float_string(longitude)
_validate_float_string(altitude)
object.__setattr__(self, 'latitude', latitude)
object.__setattr__(self, 'longitude', longitude)
object.__setattr__(self, 'altitude', altitude)
def to_text(self, origin=None, relativize=True, **kw):
return '{} {} {}'.format(self.latitude.decode(),
self.longitude.decode(),
self.altitude.decode())
@classmethod
def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True,
relativize_to=None):
latitude = tok.get_string()
longitude = tok.get_string()
altitude = tok.get_string()
tok.get_eol()
return cls(rdclass, rdtype, latitude, longitude, altitude)
def to_wire(self, file, compress=None, origin=None):
l = len(self.latitude)
assert l < 256
file.write(struct.pack('!B', l))
file.write(self.latitude)
l = len(self.longitude)
assert l < 256
file.write(struct.pack('!B', l))
file.write(self.longitude)
l = len(self.altitude)
assert l < 256
file.write(struct.pack('!B', l))
file.write(self.altitude)
@classmethod
def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
l = wire[current]
current += 1
rdlen -= 1
if l > rdlen:
raise dns.exception.FormError
latitude = wire[current: current + l].unwrap()
current += l
rdlen -= l
l = wire[current]
current += 1
rdlen -= 1
if l > rdlen:
raise dns.exception.FormError
longitude = wire[current: current + l].unwrap()
current += l
rdlen -= l
l = wire[current]
current += 1
rdlen -= 1
if l != rdlen:
raise dns.exception.FormError
altitude = wire[current: current + l].unwrap()
return cls(rdclass, rdtype, latitude, longitude, altitude)
@property
def float_latitude(self):
"latitude as a floating point value"
return float(self.latitude)
@property
def float_longitude(self):
"longitude as a floating point value"
return float(self.longitude)
@property
def float_altitude(self):
"altitude as a floating point value"
return float(self.altitude)
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