Module: PacketGen::PcapNG::Block

Included in:
EPB, IDB, SHB, SPB, UnknownBlock
Defined in:
lib/packetgen/pcapng/block.rb

Overview

Mixin module to declare some common methods for block classes.

Instance Method Summary collapse

Instance Method Details

#has_options? ⇒ Boolean

Has this block option?

Returns:

  • (Boolean) 


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# File 'lib/packetgen/pcapng/block.rb', line 14

def has_options?
  self[:options].size > 0
end

#pad_field(*fields) ⇒ void

This method returns an undefined value.

Pad given field to 32 bit boundary, if needed

Parameters:

  • fields (Array<Symbol>) —

    block fields to pad



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# File 'lib/packetgen/pcapng/block.rb', line 28

def pad_field(*fields)
  fields.each do |field|
    unless self[field].size % 4 == 0
      self[field] << "\x00" * (4 - (self[field].size % 4))
    end
  end
end

#recalc_block_len ⇒ void

This method returns an undefined value.

Calculate block length and update :block_len and block_len2 fields



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# File 'lib/packetgen/pcapng/block.rb', line 20

def recalc_block_len
  len = to_a.map(&:to_s).join.size
  self[:block_len].value = self[:block_len2].value = len
end