54 lines
1.4 KiB
Elixir
54 lines
1.4 KiB
Elixir
defmodule Openflow.Action.NxRegLoad do
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import Bitwise
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defstruct(
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n_bits: 0,
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offset: 0,
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dst_field: nil,
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value: nil
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)
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@experimenter 0x00002320
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@nxast 7
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alias __MODULE__
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alias Openflow.Action.Experimenter
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def new(options \\ []) do
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dst_field = options[:dst_field] || raise "dst_field must be specified"
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value = options[:value] || raise "value must be specified"
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default_n_bits = Openflow.Match.Field.n_bits_of(dst_field)
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%NxRegLoad{
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n_bits: options[:n_bits] || default_n_bits,
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offset: options[:offset] || 0,
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dst_field: dst_field,
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value: value
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}
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end
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def to_binary(%NxRegLoad{} = load) do
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ofs_nbits = load.offset <<< 6 ||| load.n_bits - 1
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dst_field_bin = Openflow.Match.codec_header(load.dst_field)
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value_int =
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load.value
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|> Openflow.Match.Field.codec(load.dst_field)
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|> :binary.decode_unsigned(:big)
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Experimenter.pack_exp_header(<<
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@experimenter::32,
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@nxast::16,
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ofs_nbits::16,
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dst_field_bin::4-bytes,
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value_int::size(8)-unit(8)
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>>)
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end
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def read(<<@experimenter::32, @nxast::16, body::bytes>>) do
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<<ofs::10, n_bits::6, dst_field_bin::4-bytes, value_bin::bytes>> = body
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dst_field = Openflow.Match.codec_header(dst_field_bin)
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value = Openflow.Match.Field.codec(value_bin, dst_field)
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%NxRegLoad{n_bits: n_bits + 1, offset: ofs, dst_field: dst_field, value: value}
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end
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end
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