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