Module: Pio::IPv4Header

Includes:
Payload
Included in:
Dhcp::Frame, Pio::Icmp::Format, PacketIn::DataParser::IPv4Packet, Udp
Defined in:
lib/pio/ipv4_header.rb

Overview

IP Version 4 Header Format

Defined Under Namespace

Modules: ProtocolNumber

Class Method Summary collapse

Methods included from Payload

#binary_after

Class Method Details

.included(klass) ⇒ Object

rubocop:disable MethodLength rubocop:disable AbcSize This method smells of :reek:TooManyStatements



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# File 'lib/pio/ipv4_header.rb', line 18

def self.included(klass)
  def klass.ipv4_header(options = {})
    bit4 :ip_version, value: 0x4
    bit4 :ip_header_length, initial_value: 0x5
    uint8 :ip_type_of_service, initial_value: 0
    uint16be :ip_total_length, initial_value: :calculate_ip_length
    uint16be :ip_identifier, initial_value: 0
    bit3 :ip_flag, initial_value: 0
    bit13 :ip_fragment, initial_value: 0
    uint8 :ip_ttl, initial_value: 128
    uint8 :ip_protocol, initial_value: options[:ip_protocol] || 0
    uint16be :ip_header_checksum, initial_value: :calculate_ip_checksum
    ip_address :ip_source_address
    ip_address :ip_destination_address
    string :ip_option, read_length: :ip_option_length
  end
end