Class: Resolv::DNS::Message::MessageEncoder

Inherits:
Object
  • Object
show all
Defined in:
lib/resolv.rb

Overview

:nodoc:

Instance Method Summary collapse

Constructor Details

#initialize {|_self| ... } ⇒ MessageEncoder

Returns a new instance of MessageEncoder.

Yields:

  • (_self)

Yield Parameters:



1466
1467
1468
1469
1470
 
# File 'lib/resolv.rb', line 1466

def initialize
  @data = ''.dup
  @names = {}
  yield self
end

Instance Method Details

#put_bytes(d) ⇒ Object 



1476
1477
1478
 
# File 'lib/resolv.rb', line 1476

def put_bytes(d)
  @data << d
end

#put_label(d) ⇒ Object 



1524
1525
1526
 
# File 'lib/resolv.rb', line 1524

def put_label(d)
  self.put_string(d.to_s)
end

#put_labels(d, compress: true) ⇒ Object 



1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
 
# File 'lib/resolv.rb', line 1508

def put_labels(d, compress: true)
  d.each_index {|i|
    domain = d[i..-1]
    if compress && idx = @names[domain]
      self.put_pack("n", 0xc000 | idx)
      return
    else
      if @data.length < 0x4000
        @names[domain] = @data.length
      end
      self.put_label(d[i])
    end
  }
  @data << "\0"
end

#put_length16 ⇒ Object 



1484
1485
1486
1487
1488
1489
1490
1491
 
# File 'lib/resolv.rb', line 1484

def put_length16
  length_index = @data.length
  @data << "\0\0"
  data_start = @data.length
  yield
  data_end = @data.length
  @data[length_index, 2] = [data_end - data_start].pack("n")
end

#put_name(d, compress: true) ⇒ Object 



1504
1505
1506
 
# File 'lib/resolv.rb', line 1504

def put_name(d, compress: true)
  put_labels(d.to_a, compress: compress)
end

#put_pack(template, *d) ⇒ Object 



1480
1481
1482
 
# File 'lib/resolv.rb', line 1480

def put_pack(template, *d)
  @data << d.pack(template)
end

#put_string(d) ⇒ Object 



1493
1494
1495
1496
 
# File 'lib/resolv.rb', line 1493

def put_string(d)
  self.put_pack("C", d.length)
  @data << d
end

#put_string_list(ds) ⇒ Object 



1498
1499
1500
1501
1502
 
# File 'lib/resolv.rb', line 1498

def put_string_list(ds)
  ds.each {|d|
    self.put_string(d)
  }
end

#to_s ⇒ Object 



1472
1473
1474
 
# File 'lib/resolv.rb', line 1472

def to_s
  return @data
end