Source Code for Module dns.rdtypes.IN.PX

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15   
16  import struct 
17   
18  import dns.exception 
19  import dns.rdata 
20  import dns.name 
21   
22   
23 -class PX(dns.rdata.Rdata): 
24   
25      """PX record. 
26   
27      @ivar preference: the preference value 
28      @type preference: int 
29      @ivar map822: the map822 name 
30      @type map822: dns.name.Name object 
31      @ivar mapx400: the mapx400 name 
32      @type mapx400: dns.name.Name object 
33      @see: RFC 2163""" 
34   
35      __slots__ = ['preference', 'map822', 'mapx400'] 
36   
37 -    def __init__(self, rdclass, rdtype, preference, map822, mapx400): 
38          super(PX, self).__init__(rdclass, rdtype) 
39          self.preference = preference 
40          self.map822 = map822 
41          self.mapx400 = mapx400 
42   
43 -    def to_text(self, origin=None, relativize=True, **kw): 
44          map822 = self.map822.choose_relativity(origin, relativize) 
45          mapx400 = self.mapx400.choose_relativity(origin, relativize) 
46          return '%d %s %s' % (self.preference, map822, mapx400) 
47   
48      @classmethod 
49 -    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True): 
50          preference = tok.get_uint16() 
51          map822 = tok.get_name() 
52          map822 = map822.choose_relativity(origin, relativize) 
53          mapx400 = tok.get_name(None) 
54          mapx400 = mapx400.choose_relativity(origin, relativize) 
55          tok.get_eol() 
56          return cls(rdclass, rdtype, preference, map822, mapx400) 
57   
58 -    def to_wire(self, file, compress=None, origin=None): 
59          pref = struct.pack("!H", self.preference) 
60          file.write(pref) 
61          self.map822.to_wire(file, None, origin) 
62          self.mapx400.to_wire(file, None, origin) 
63   
64      @classmethod 
65 -    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None): 
66          (preference, ) = struct.unpack('!H', wire[current: current + 2]) 
67          current += 2 
68          rdlen -= 2 
69          (map822, cused) = dns.name.from_wire(wire[: current + rdlen], 
70                                               current) 
71          if cused > rdlen: 
72              raise dns.exception.FormError 
73          current += cused 
74          rdlen -= cused 
75          if origin is not None: 
76              map822 = map822.relativize(origin) 
77          (mapx400, cused) = dns.name.from_wire(wire[: current + rdlen], 
78                                                current) 
79          if cused != rdlen: 
80              raise dns.exception.FormError 
81          if origin is not None: 
82              mapx400 = mapx400.relativize(origin) 
83          return cls(rdclass, rdtype, preference, map822, mapx400) 
84   
85 -    def choose_relativity(self, origin=None, relativize=True): 
86          self.map822 = self.map822.choose_relativity(origin, relativize) 
87          self.mapx400 = self.mapx400.choose_relativity(origin, relativize) 
88