Top Level Namespace

Defined Under Namespace

Classes: ACLIdASA, Appid56PanaL7Pen, Appid64PanaL7Pen, Appid72PanaL7Pen, Application_Id16, Application_Id24, Application_Id32, Application_Id40, Application_Id56, Application_Id64, Application_Id72, Forwarding_Status, Header, IP4Addr, IP6Addr, IpfixOptionFlowset, IpfixPDU, IpfixTemplateFlowset, MPLSLabelStackOctets, MacAddr, Netflow5PDU, Netflow9PDU, NetflowOptionFlowset, NetflowTemplateFlowset, OctetArray, VarSkip, VarString, Vash

Instance Method Summary collapse

Instance Method Details

#iana2bindata(type) ⇒ Object

Convert IANA types to those used by BinData or created by ourselves



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# File 'lib/logstash/codecs/netflow/iana2yaml.rb', line 8

def iana2bindata(type)
  case type
  when /^unsigned(\d+)$/
    return 'uint' + $1
  when /^signed(\d+)$/
    return 'int' + $1
  when 'float32'
    return 'float'
  when 'float64'
    return 'double'
  when 'ipv4Address'
    return 'ip4_addr'
  when 'ipv6Address'
    return 'ip6_addr'
  when 'macAddress'
    return 'mac_addr'
  when 'octetArray', 'string'
    return 'string'
  when 'dateTimeSeconds'
    return 'uint32'
  when 'dateTimeMilliseconds', 'dateTimeMicroseconds', 'dateTimeNanoseconds'
    return 'uint64'
  when 'boolean'
    return 'uint8'
  when 'basicList', 'subTemplateList', 'subTemplateMultiList'
    return 'skip'
  else
    raise "Unknown type #{type}"
  end
end

#iana2hash(url) ⇒ Object 



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# File 'lib/logstash/codecs/netflow/iana2yaml.rb', line 39

def iana2hash(url)
  fields = { 0 => {} }

  # Read in IANA-registered Information Elements (PEN 0)
  CSV.new(open(url), :headers => :first_row, :converters => :numeric).each do |line|
    # If it's not a Fixnum it's something like 'x-y' used to mark reserved blocks
    next if line['ElementID'].class != Fixnum

    # Blacklisted ID's
    next if [0].include?(line['ElementID'])

    # Skip any elements with no name
    next unless line['Name'] and line['Data Type']

    fields[0][line['ElementID']] = [iana2bindata(line['Data Type']).to_sym]
    if fields[0][line['ElementID']][0] != :skip
      fields[0][line['ElementID']] << line['Name'].to_sym
    end
  end

  # Overrides
  fields[0][210][0] = :skip # 210 is PaddingOctets so skip them properly
  fields[0][210].delete_at(1)

  # Generate the reverse PEN (PEN 29305)
  reversed = fields[0].reject { |k|
    # Excluded according to RFC 5103
    [40,41,42,130,131,137,145,148,149,163,164,165,166,167,168,173,210,211,212,213,214,215,216,217,239].include?(k)
  }.map { |k,v|
    [k, v.size > 1 ? [v[0], ('reverse' + v[1].to_s.slice(0,1).capitalize + v[1].to_s.slice(1..-1)).to_sym] : [v[0]]]
  }
  fields[29305] = Hash[reversed]

  return fields
end