43 lines
1.6 KiB
Elixir
43 lines
1.6 KiB
Elixir
defmodule Openflow.Action.NxOutputReg 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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src_field: nil,
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max_len: :no_buffer
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)
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@experimenter 0x00002320
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@nxast 15
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alias __MODULE__
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def new(options) do
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src_field = Keyword.get(options, :src_field)
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default_n_bits = Openflow.Match.Field.n_bits_of(src_field)
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n_bits = Keyword.get(options, :n_bits, default_n_bits)
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ofs = Keyword.get(options, :offset, 0)
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max_len = Keyword.get(options, :max_len, :no_buffer)
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%NxOutputReg{n_bits: n_bits, offset: ofs, src_field: src_field, max_len: max_len}
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end
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def to_binary(%NxOutputReg{n_bits: n_bits, offset: ofs, src_field: src_field, max_len: max_len}) do
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src_field_bin = Openflow.Match.codec_header(src_field)
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ofs_nbits = ofs <<< 6 ||| n_bits - 1
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max_len = Openflow.Utils.get_enum(max_len, :controller_max_len)
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body = <<ofs_nbits::16, src_field_bin::4-bytes, max_len::16, 0::size(6)-unit(8)>>
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exp_body = <<@experimenter::32, @nxast::16, body::bytes>>
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exp_body_size = byte_size(exp_body)
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padding_length = Openflow.Utils.padding(4 + exp_body_size, 8)
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length = 4 + exp_body_size + padding_length
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<<0xFFFF::16, length::16, exp_body::bytes, 0::size(padding_length)-unit(8)>>
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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, src_field_bin::4-bytes, max_len::16, _::size(6)-unit(8)>> = body
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src_field = Openflow.Match.codec_header(src_field_bin)
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max_len = Openflow.Utils.get_enum(max_len, :controller_max_len)
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%NxOutputReg{n_bits: n_bits + 1, offset: ofs, src_field: src_field, max_len: max_len}
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end
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end
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