Class: PacketGen::Header::PPI

Inherits:
Base show all
Defined in:
lib/packetgen/header/dot11.rb

Overview

PPI (Per-Packet Information) packet

Instance Attribute Summary collapse

Attributes inherited from Base

#packet

Instance Method Summary collapse

Methods inherited from Base

bind_header, #header_id, inherited, #ip_header, known_headers, #protocol_name

Methods inherited from Types::Fields

#[], #[]=, define_bit_fields_on, define_field, define_field_after, define_field_before, #fields, #force_binary, inherited, #initialize, #inspect, #sz, #to_h, #to_s

Constructor Details

This class inherits a constructor from PacketGen::Types::Fields

Instance Attribute Details

#align ⇒ Boolean

Returns align flag from #flags attribute.

Returns:

  • (Boolean) —

    align flag from #flags attribute



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# File 'lib/packetgen/header/dot11.rb', line 34

define_bit_fields_on :flags, :reserved, 7, :align

#body ⇒ Type::String

Returns:

  • (Type::String) 


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# File 'lib/packetgen/header/dot11.rb', line 31

define_field :body, Types::String

#dlt ⇒ Integer

Returns 32-bit PPI data link type.

Returns:

  • (Integer) —

    32-bit PPI data link type



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# File 'lib/packetgen/header/dot11.rb', line 25

define_field :dlt, Types::Int32le

#flags ⇒ Integer

Returns 8-bit PPI flags.

Returns:

  • (Integer) —

    8-bit PPI flags



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# File 'lib/packetgen/header/dot11.rb', line 19

define_field :flags, Types::Int8

#length ⇒ Integer

Returns 16-bit PPI header length.

Returns:

  • (Integer) —

    16-bit PPI header length



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# File 'lib/packetgen/header/dot11.rb', line 22

define_field :length, Types::Int16le, default: 8

#ppi_fields ⇒ Type::String

Returns concatenation of PPI fields.

Returns:

  • (Type::String) —

    concatenation of PPI fields



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# File 'lib/packetgen/header/dot11.rb', line 28

define_field :ppi_fields, Types::String

#version ⇒ Integer

Returns 8-bit PPI version.

Returns:

  • (Integer) —

    8-bit PPI version



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# File 'lib/packetgen/header/dot11.rb', line 16

define_field :version, Types::Int8, default: 0

Instance Method Details

#parse? ⇒ Boolean

Check version field

Returns:

  • (Boolean)

See Also:

  • PacketGen::Header::PPI.[Base[Base#parse?]


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# File 'lib/packetgen/header/dot11.rb', line 52

def parse?
  version == 0
end

#read(str) ⇒ PPI

Returns self.

Parameters:

  • str (String)

Returns:

  • (PPI) —

    self



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# File 'lib/packetgen/header/dot11.rb', line 38

def read(str)
  return self if str.nil?
  force_binary str
  self[:version].read str[0, 1]
  self[:flags].read str[1, 1]
  self[:length].read str[2, 2]
  self[:dlt].read str[4, 4]
  self[:ppi_fields].read str[8, length - 8]
  self[:body].read str[length, str.size]
  self
end

#to_w(iface) ⇒ void

This method returns an undefined value.

send PPI packet on wire. Dot11 FCS trailer should be set.

Parameters:

  • iface (String) —

    interface name



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# File 'lib/packetgen/header/dot11.rb', line 59

def to_w(iface)
  pcap = PCAPRUB::Pcap.open_live(iface, PCAP_SNAPLEN, PCAP_PROMISC,
                                 PCAP_TIMEOUT)
  pcap.inject self.to_s
end