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require 'bindata'
require 'forwardable'
require 'pio/monkey_patch/integer'
module Pio
# An action to modify the IP ToS/DSCP field of a packet.
class SetIpTos
# OpenFlow 1.0 OFPAT_SET_NW_TOS action format.
class Format < BinData::Record
endian :big
uint16 :type, value: 8
uint16 :message_length, value: 8
uint8 :type_of_service
uint24 :padding
hide :padding
end
def self.read(raw_data)
set_ip_tos = allocate
set_ip_tos.instance_variable_set :@format, Format.read(raw_data)
set_ip_tos
end
extend Forwardable
def_delegators :@format, :type
def_delegators :@format, :message_length
def_delegators :@format, :type_of_service
def_delegator :@format, :to_binary_s, :to_binary
def initialize(type_of_service)
# nw_tos (IP ToS) value consists of 8 bits, of which only the 6
# high-order bits belong to DSCP, the 2 low-order bits must be
# zero.
unless type_of_service.unsigned_8bit? && type_of_service % 4 == 0
fail ArgumentError, 'Invalid type_of_service (ToS) value.'
end
@format = Format.new(type_of_service: type_of_service)
end
end
end
Version data entries
17 entries across 17 versions & 1 rubygems