# 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.immutable
import dns.rdata
import dns.tokenizer
def _validate_float_string(what):
if len(what) == 0:
raise dns.exception.FormError
if what[0] == b"-"[0] or what[0] == b"+"[0]:
what = what[1:]
if what.isdigit():
return
try:
(left, right) = what.split(b".")
except ValueError:
raise dns.exception.FormError
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
[docs]
@dns.immutable.immutable
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 = self._as_bytes(latitude, True, 255)
longitude = self._as_bytes(longitude, True, 255)
altitude = self._as_bytes(altitude, True, 255)
_validate_float_string(latitude)
_validate_float_string(longitude)
_validate_float_string(altitude)
self.latitude = latitude
self.longitude = longitude
self.altitude = altitude
flat = self.float_latitude
if flat < -90.0 or flat > 90.0:
raise dns.exception.FormError("bad latitude")
flong = self.float_longitude
if flong < -180.0 or flong > 180.0:
raise dns.exception.FormError("bad longitude")
[docs]
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()
return cls(rdclass, rdtype, latitude, longitude, altitude)
def _to_wire(self, file, compress=None, origin=None, canonicalize=False):
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_parser(cls, rdclass, rdtype, parser, origin=None):
latitude = parser.get_counted_bytes()
longitude = parser.get_counted_bytes()
altitude = parser.get_counted_bytes()
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)