1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16 import dns.exception
17 import dns.rdata
18 import dns.tokenizer
19 import dns.util
20
21 -class ISDN(dns.rdata.Rdata):
22 """ISDN record
23
24 @ivar address: the ISDN address
25 @type address: string
26 @ivar subaddress: the ISDN subaddress (or '' if not present)
27 @type subaddress: string
28 @see: RFC 1183"""
29
30 __slots__ = ['address', 'subaddress']
31
32 - def __init__(self, rdclass, rdtype, address, subaddress):
33 super(ISDN, self).__init__(rdclass, rdtype)
34 self.address = address
35 self.subaddress = subaddress
36
37 - def to_text(self, origin=None, relativize=True, **kw):
38 if self.subaddress:
39 return '"%s" "%s"' % (dns.rdata._escapify(self.address),
40 dns.rdata._escapify(self.subaddress))
41 else:
42 return '"%s"' % dns.rdata._escapify(self.address)
43
44 - def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True):
45 address = tok.get_string().encode('ascii')
46 t = tok.get()
47 if not t.is_eol_or_eof():
48 tok.unget(t)
49 subaddress = tok.get_string().encode('ascii')
50 else:
51 tok.unget(t)
52 subaddress = b''
53 tok.get_eol()
54 return cls(rdclass, rdtype, address, subaddress)
55
56 from_text = classmethod(from_text)
57
58 - def to_wire(self, file, compress = None, origin = None):
59 l = len(self.address)
60 assert l < 256
61 dns.util.write_uint8(file, l)
62 file.write(self.address)
63 l = len(self.subaddress)
64 if l > 0:
65 assert l < 256
66 dns.util.write_uint8(file, l)
67 file.write(self.subaddress)
68
69 - def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None):
70 l = wire[current]
71 current += 1
72 rdlen -= 1
73 if l > rdlen:
74 raise dns.exception.FormError
75 address = wire[current : current + l]
76 current += l
77 rdlen -= l
78 if rdlen > 0:
79 l = wire[current]
80 current += 1
81 rdlen -= 1
82 if l != rdlen:
83 raise dns.exception.FormError
84 subaddress = wire[current : current + l]
85 else:
86 subaddress = b''
87 return cls(rdclass, rdtype, address, subaddress)
88
89 from_wire = classmethod(from_wire)
90
91 - def _cmp(self, other):
92 v = dns.util.cmp(self.address, other.address)
93 if v == 0:
94 v = dns.util.cmp(self.subaddress, other.subaddress)
95 return v
96