mirror of https://github.com/morpheus65535/bazarr
106 lines
3.7 KiB
Python
106 lines
3.7 KiB
Python
|
# 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 socket
|
||
|
import struct
|
||
|
|
||
|
import dns.ipv4
|
||
|
import dns.rdata
|
||
|
from dns._compat import xrange
|
||
|
|
||
|
_proto_tcp = socket.getprotobyname('tcp')
|
||
|
_proto_udp = socket.getprotobyname('udp')
|
||
|
|
||
|
|
||
|
class WKS(dns.rdata.Rdata):
|
||
|
|
||
|
"""WKS record
|
||
|
|
||
|
@ivar address: the address
|
||
|
@type address: string
|
||
|
@ivar protocol: the protocol
|
||
|
@type protocol: int
|
||
|
@ivar bitmap: the bitmap
|
||
|
@type bitmap: string
|
||
|
@see: RFC 1035"""
|
||
|
|
||
|
__slots__ = ['address', 'protocol', 'bitmap']
|
||
|
|
||
|
def __init__(self, rdclass, rdtype, address, protocol, bitmap):
|
||
|
super(WKS, self).__init__(rdclass, rdtype)
|
||
|
self.address = address
|
||
|
self.protocol = protocol
|
||
|
if not isinstance(bitmap, bytearray):
|
||
|
self.bitmap = bytearray(bitmap)
|
||
|
else:
|
||
|
self.bitmap = bitmap
|
||
|
|
||
|
def to_text(self, origin=None, relativize=True, **kw):
|
||
|
bits = []
|
||
|
for i in xrange(0, len(self.bitmap)):
|
||
|
byte = self.bitmap[i]
|
||
|
for j in xrange(0, 8):
|
||
|
if byte & (0x80 >> j):
|
||
|
bits.append(str(i * 8 + j))
|
||
|
text = ' '.join(bits)
|
||
|
return '%s %d %s' % (self.address, self.protocol, text)
|
||
|
|
||
|
@classmethod
|
||
|
def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
|
||
|
address = tok.get_string()
|
||
|
protocol = tok.get_string()
|
||
|
if protocol.isdigit():
|
||
|
protocol = int(protocol)
|
||
|
else:
|
||
|
protocol = socket.getprotobyname(protocol)
|
||
|
bitmap = bytearray()
|
||
|
while 1:
|
||
|
token = tok.get().unescape()
|
||
|
if token.is_eol_or_eof():
|
||
|
break
|
||
|
if token.value.isdigit():
|
||
|
serv = int(token.value)
|
||
|
else:
|
||
|
if protocol != _proto_udp and protocol != _proto_tcp:
|
||
|
raise NotImplementedError("protocol must be TCP or UDP")
|
||
|
if protocol == _proto_udp:
|
||
|
protocol_text = "udp"
|
||
|
else:
|
||
|
protocol_text = "tcp"
|
||
|
serv = socket.getservbyname(token.value, protocol_text)
|
||
|
i = serv // 8
|
||
|
l = len(bitmap)
|
||
|
if l < i + 1:
|
||
|
for j in xrange(l, i + 1):
|
||
|
bitmap.append(0)
|
||
|
bitmap[i] = bitmap[i] | (0x80 >> (serv % 8))
|
||
|
bitmap = dns.rdata._truncate_bitmap(bitmap)
|
||
|
return cls(rdclass, rdtype, address, protocol, bitmap)
|
||
|
|
||
|
def to_wire(self, file, compress=None, origin=None):
|
||
|
file.write(dns.ipv4.inet_aton(self.address))
|
||
|
protocol = struct.pack('!B', self.protocol)
|
||
|
file.write(protocol)
|
||
|
file.write(self.bitmap)
|
||
|
|
||
|
@classmethod
|
||
|
def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
|
||
|
address = dns.ipv4.inet_ntoa(wire[current: current + 4])
|
||
|
protocol, = struct.unpack('!B', wire[current + 4: current + 5])
|
||
|
current += 5
|
||
|
rdlen -= 5
|
||
|
bitmap = wire[current: current + rdlen].unwrap()
|
||
|
return cls(rdclass, rdtype, address, protocol, bitmap)
|