133259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck# Copyright (C) 2003-2007, 2009, 2010 Nominum, Inc. 233259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck# 333259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck# Permission to use, copy, modify, and distribute this software and its 433259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck# documentation for any purpose with or without fee is hereby granted, 533259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck# provided that the above copyright notice and this permission notice 633259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck# appear in all copies. 733259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck# 833259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES 933259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 1033259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR 1133259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 1233259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 1333259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 1433259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 1533259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck 1633259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reckimport socket 1733259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reckimport struct 1833259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck 1933259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reckimport dns.ipv4 2033259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reckimport dns.rdata 2133259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck 2233259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck_proto_tcp = socket.getprotobyname('tcp') 2333259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck_proto_udp = socket.getprotobyname('udp') 2433259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck 2533259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reckclass WKS(dns.rdata.Rdata): 2633259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck """WKS record 2733259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck 2833259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck @ivar address: the address 2933259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck @type address: string 3033259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck @ivar protocol: the protocol 3133259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck @type protocol: int 3233259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck @ivar bitmap: the bitmap 3333259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck @type bitmap: string 3433259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck @see: RFC 1035""" 3533259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck 3633259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck __slots__ = ['address', 'protocol', 'bitmap'] 3733259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck 3833259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck def __init__(self, rdclass, rdtype, address, protocol, bitmap): 3933259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck super(WKS, self).__init__(rdclass, rdtype) 4033259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck self.address = address 4133259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck self.protocol = protocol 4233259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck self.bitmap = bitmap 4333259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck 4433259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck def to_text(self, origin=None, relativize=True, **kw): 4533259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck bits = [] 4633259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck for i in xrange(0, len(self.bitmap)): 4733259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck byte = ord(self.bitmap[i]) 4833259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck for j in xrange(0, 8): 4933259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck if byte & (0x80 >> j): 5033259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck bits.append(str(i * 8 + j)) 5133259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck text = ' '.join(bits) 5233259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck return '%s %d %s' % (self.address, self.protocol, text) 5333259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck 5433259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True): 5533259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck address = tok.get_string() 5633259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck protocol = tok.get_string() 5733259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck if protocol.isdigit(): 5833259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck protocol = int(protocol) 5933259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck else: 6033259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck protocol = socket.getprotobyname(protocol) 6133259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck bitmap = [] 6233259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck while 1: 6333259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck token = tok.get().unescape() 6433259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck if token.is_eol_or_eof(): 6533259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck break 6633259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck if token.value.isdigit(): 6733259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck serv = int(token.value) 6833259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck else: 6933259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck if protocol != _proto_udp and protocol != _proto_tcp: 7033259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck raise NotImplementedError("protocol must be TCP or UDP") 7133259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck if protocol == _proto_udp: 7233259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck protocol_text = "udp" 7333259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck else: 7433259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck protocol_text = "tcp" 7533259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck serv = socket.getservbyname(token.value, protocol_text) 7633259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck i = serv // 8 7733259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck l = len(bitmap) 7833259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck if l < i + 1: 7933259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck for j in xrange(l, i + 1): 8033259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck bitmap.append('\x00') 8133259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck bitmap[i] = chr(ord(bitmap[i]) | (0x80 >> (serv % 8))) 8233259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck bitmap = dns.rdata._truncate_bitmap(bitmap) 8333259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck return cls(rdclass, rdtype, address, protocol, bitmap) 8433259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck 8533259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck from_text = classmethod(from_text) 8633259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck 8733259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck def to_wire(self, file, compress = None, origin = None): 8833259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck file.write(dns.ipv4.inet_aton(self.address)) 8933259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck protocol = struct.pack('!B', self.protocol) 9033259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck file.write(protocol) 9133259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck file.write(self.bitmap) 9233259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck 9333259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None): 9433259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck address = dns.ipv4.inet_ntoa(wire[current : current + 4]) 9533259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck protocol, = struct.unpack('!B', wire[current + 4 : current + 5]) 9633259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck current += 5 9733259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck rdlen -= 5 9833259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck bitmap = wire[current : current + rdlen] 9933259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck return cls(rdclass, rdtype, address, protocol, bitmap) 10033259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck 10133259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck from_wire = classmethod(from_wire) 10233259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck 10333259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck def _cmp(self, other): 10433259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck sa = dns.ipv4.inet_aton(self.address) 10533259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck oa = dns.ipv4.inet_aton(other.address) 10633259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck v = cmp(sa, oa) 10733259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck if v == 0: 10833259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck sp = struct.pack('!B', self.protocol) 10933259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck op = struct.pack('!B', other.protocol) 11033259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck v = cmp(sp, op) 11133259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck if v == 0: 11233259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck v = cmp(self.bitmap, other.bitmap) 11333259e44c8229f70ffe0cf3bb5ca9375c4feb2f9John Reck return v 114