Class: Arpie::FixedBinaryType

Inherits:
BinaryType show all
Defined in:
lib/arpie/binary/fixed_type.rb

Constant Summary

Constants included from Arpie

MTU, VERSION

Instance Method Summary collapse

Methods inherited from BinaryType

#check_limit, #required_opts

Methods included from Arpie

#bogon!, #incomplete!

Instance Method Details

#binary_size(opts) ⇒ Object 



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# File 'lib/arpie/binary/fixed_type.rb', line 3

def binary_size opts
  opts[:value].size
end

#from(binary, opts) ⇒ Object 



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# File 'lib/arpie/binary/fixed_type.rb', line 7

def from binary, opts
  opts[:value] or raise ArgumentError, "Requires option :value"
  sz = opts[:value].size
  binary.size >= sz or incomplete!
  existing = binary.unpack("a#{sz}")[0]
  existing == opts[:value] or bogon! nil, ":fixed did not match data in packet"

  [opts[:value], opts[:value].size]
end

#to(object, opts) ⇒ Object 



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# File 'lib/arpie/binary/fixed_type.rb', line 17

def to object, opts
  opts[:value] or raise ArgumentError, "Requires option :value"
  object == opts[:value] or bogon! nil, ":fixed did not match data in structure"
  opts[:value]
end