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Contents
# coding: utf-8
# This file is part of PacketGen
# See https://github.com/sdaubert/packetgen for more informations
# Copyright (C) 2016 Sylvain Daubert <sylvain.daubert@laposte.net>
# This program is published under MIT license.
module PacketGen
module Header
class Dot11
# IEEE 802.11 data frame header
#
# This class make a {Dot11} header with {#type} set to +2+
# (data frame).
#
# A IEEE 802.11 data header consists of:
# * a {#frame_ctrl} ({Types::Int16}),
# * a {#id}/duration ({Types::Int16le}),
# * a {#mac2} ({Eth::MacAddr}),
# * a {#mac3} ({Eth::MacAddr}),
# * a {#sequence_ctrl} ({Types::Int16}),
# * sometimes a {#mac4} ({Eth::MacAddr}),
# * sometimes a {#qos_ctrl} ({Types::Int16}),
# * a {#body} (a {Types::String} or another {Base} class),
# * and a Frame check sequence ({#fcs}, of type {Types::Int32le}).
# @author Sylvain Daubert
class Data < Dot11
# @param [Hash] options
# @see Base#initialize
def initialize(options={})
super({type: 2}.merge!(options))
@applicable_fields -= %i(mac4 qos_ctrl ht_ctrl)
define_applicable_fields
end
private
def define_applicable_fields
super
if subtype >= 8 and !@applicable_fields.include? :qos_ctrl
# Insert after mac4, if present
# else insert after sequence_ctrl
if @applicable_fields.include? :mac4
idx = @applicable_fields.index(:mac4)
@applicable_fields[idx, 0] = :qos_ctrl
else
@applicable_fields[6, 0] = :qos_ctrl
end
elsif subtype < 8
@applicable_fields -= %i(qos_ctrl)
end
end
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems