Mac address OUI lookup

oui_lookup.rb

db, oui, company, address = {}, nil, nil, ''
lines = File.readlines('oui.txt') #http://standards.ieee.org/develop/regauth/oui/oui.txt
lines.each do |line|
  #line.encode!('UTF-16', 'UTF-8', :invalid => :replace, :replace => '').encode!('UTF-8', 'UTF-16').rstrip!
  line = line.unpack("C*").pack("U*").rstrip
  if m = line.match(/^(\d\d-\d\d-\d\d)\s+\(hex\)\s+(.*?)$/)
    oui, company = m[1], m[2]
  elsif oui && company && m = line.match(/^\s+(.*?)$/)
    address << m[1] << "\n"
  elsif oui && company && line == ''
    db[oui] = [company, address]
    oui, company, address = nil, nil, ''
  end
end