Source Code for Module dns.rdtypes.IN.SRV

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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 SRV(dns.rdata.Rdata): 
24   
25      """SRV record 
26   
27      @ivar priority: the priority 
28      @type priority: int 
29      @ivar weight: the weight 
30      @type weight: int 
31      @ivar port: the port of the service 
32      @type port: int 
33      @ivar target: the target host 
34      @type target: dns.name.Name object 
35      @see: RFC 2782""" 
36   
37      __slots__ = ['priority', 'weight', 'port', 'target'] 
38   
39 -    def __init__(self, rdclass, rdtype, priority, weight, port, target): 
40          super(SRV, self).__init__(rdclass, rdtype) 
41          self.priority = priority 
42          self.weight = weight 
43          self.port = port 
44          self.target = target 
45   
46 -    def to_text(self, origin=None, relativize=True, **kw): 
47          target = self.target.choose_relativity(origin, relativize) 
48          return '%d %d %d %s' % (self.priority, self.weight, self.port, 
49                                  target) 
50   
51      @classmethod 
52 -    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True): 
53          priority = tok.get_uint16() 
54          weight = tok.get_uint16() 
55          port = tok.get_uint16() 
56          target = tok.get_name(None) 
57          target = target.choose_relativity(origin, relativize) 
58          tok.get_eol() 
59          return cls(rdclass, rdtype, priority, weight, port, target) 
60   
61 -    def to_wire(self, file, compress=None, origin=None): 
62          three_ints = struct.pack("!HHH", self.priority, self.weight, self.port) 
63          file.write(three_ints) 
64          self.target.to_wire(file, compress, origin) 
65   
66      @classmethod 
67 -    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None): 
68          (priority, weight, port) = struct.unpack('!HHH', 
69                                                   wire[current: current + 6]) 
70          current += 6 
71          rdlen -= 6 
72          (target, cused) = dns.name.from_wire(wire[: current + rdlen], 
73                                               current) 
74          if cused != rdlen: 
75              raise dns.exception.FormError 
76          if origin is not None: 
77              target = target.relativize(origin) 
78          return cls(rdclass, rdtype, priority, weight, port, target) 
79   
80 -    def choose_relativity(self, origin=None, relativize=True): 
81          self.target = self.target.choose_relativity(origin, relativize) 
82