Class: DHCP::OptInt8List

Inherits:
OptListFixedData show all
Defined in:
lib/dhcp/options.rb

Overview

Class for DHCP options containing a list of 8-bit integers (like lists of requested DHCP options). Also acts as parent class to lists of larger fixed-sized numeric types.

Direct Known Subclasses

OptInt16List

Instance Attribute Summary

Attributes inherited from OptData

#data

Attributes inherited from Opt

#name, #opt

Instance Method Summary collapse

Methods inherited from OptListFixedData

#split_data

Methods inherited from OptListData

#append, #data=, #each, #get, #initialize, #is_list?, #set, #size, #split_data

Methods inherited from OptData

#get, #initialize, #opt_header, #set, #to_opt

Methods inherited from Opt

#initialize, #opt_header, #to_opt

Constructor Details

This class inherits a constructor from DHCP::OptListData

Instance Method Details

#bin_to_data(data) ⇒ Object 



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# File 'lib/dhcp/options.rb', line 502

def bin_to_data(data)
  data.each_byte.inject(0){|sum,byte| sum<<8|byte}
end

#data_to_bin(data) ⇒ Object 



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# File 'lib/dhcp/options.rb', line 506

def data_to_bin(data)
  raise "Invalid numeric data" unless data.is_a?(Fixnum) && data >= 0
  raise "Invalid number" unless data == data & ([0xff] * self.class.item_size).inject(0){|sum,byte| sum<<8|byte}
  bytes = ''
  while data != 0
    bytes = (data & 0xff).chr + bytes
    data >>= 8
  end
  raise "Impossible: Numeric byte size #{bytes.size} exceeds #{self.class.item_size}" if bytes.size > self.class.item_size
  0.chr * (self.class.item_size - bytes.size) + bytes
end

#to_s ⇒ Object 



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# File 'lib/dhcp/options.rb', line 518

def to_s
  opt_header + '=[' + map{|x| x.to_s}.join(',') + ']'
end