Class: Dnsruby::MessageEncoder
- Inherits:
-
Object
- Object
- Dnsruby::MessageEncoder
- Defined in:
- lib/dnsruby/message/encoder.rb
Overview
:nodoc: all
Instance Method Summary collapse
-
#initialize {|_self| ... } ⇒ MessageEncoder
constructor
A new instance of MessageEncoder.
- #put_bytes(d) ⇒ Object
- #put_label(d) ⇒ Object
- #put_labels(d, do_canonical) ⇒ Object
- #put_length16 ⇒ Object
- #put_name(d, canonical = false, downcase = canonical) ⇒ Object
- #put_pack(template, *d) ⇒ Object
- #put_rr(rr, canonical = false) ⇒ Object
- #put_string(d) ⇒ Object
- #put_string_list(ds) ⇒ Object
- #to_s ⇒ Object
Constructor Details
#initialize {|_self| ... } ⇒ MessageEncoder
Returns a new instance of MessageEncoder.
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# File 'lib/dnsruby/message/encoder.rb', line 3 def initialize @data = '' @names = {} yield self if block_given? end |
Instance Method Details
#put_bytes(d) ⇒ Object
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# File 'lib/dnsruby/message/encoder.rb', line 13 def put_bytes(d) @data << d end |
#put_label(d) ⇒ Object
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# File 'lib/dnsruby/message/encoder.rb', line 68 def put_label(d) # s, = Name.encode(d) s = d raise RuntimeError, "length of #{s} is #{s.string.length} (larger than 63 octets)" if s.string.length > 63 self.put_string(s.string) end |
#put_labels(d, do_canonical) ⇒ Object
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# File 'lib/dnsruby/message/encoder.rb', line 53 def put_labels(d, do_canonical) d.each_index do |i| domain = d[i..-1].join('.') if !do_canonical && (idx = @names[domain]) self.put_pack('n', 0xc000 | idx) return else @names[domain] = @data.length self.put_label(d[i]) end end @data << "\0" end |
#put_length16 ⇒ Object
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# File 'lib/dnsruby/message/encoder.rb', line 21 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, canonical = false, downcase = canonical) ⇒ Object
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# File 'lib/dnsruby/message/encoder.rb', line 46 def put_name(d, canonical = false, downcase = canonical) # DNSSEC requires some records (e.g. NSEC, RRSIG) to be canonicalised, but # not downcased. YUK! d = d.downcase if downcase put_labels(d.to_a, canonical) end |
#put_pack(template, *d) ⇒ Object
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# File 'lib/dnsruby/message/encoder.rb', line 17 def put_pack(template, *d) @data << d.pack(template) end |
#put_rr(rr, canonical = false) ⇒ Object
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# File 'lib/dnsruby/message/encoder.rb', line 39 def put_rr(rr, canonical=false) # RFC4034 Section 6.2 put_name(rr.name, canonical) put_pack('nnN', rr.type.code, rr.klass.code, rr.ttl) put_length16 { rr.encode_rdata(self, canonical) } end |
#put_string(d) ⇒ Object
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# File 'lib/dnsruby/message/encoder.rb', line 30 def put_string(d) self.put_pack("C", d.length) @data << d end |
#put_string_list(ds) ⇒ Object
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# File 'lib/dnsruby/message/encoder.rb', line 35 def put_string_list(ds) ds.each { |d| self.put_string(d) } end |
#to_s ⇒ Object
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# File 'lib/dnsruby/message/encoder.rb', line 9 def to_s @data end |