88 lines
2.5 KiB
Elixir
88 lines
2.5 KiB
Elixir
defmodule Openflow.Action.NxMultipath do
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import Bitwise
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defstruct(
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hash_field: :eth_src,
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basis: 0,
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algorithm: :modulo_n,
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max_link: 0,
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argument: 0,
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offset: 0,
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n_bits: 0,
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dst_field: nil
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)
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@experimenter 0x00002320
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@nxast 10
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alias __MODULE__
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def new(options) do
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hash_field = Keyword.get(options, :hash_field, :eth_src)
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basis = Keyword.get(options, :basis, 0)
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alg = Keyword.get(options, :algorithm, :modulo_n)
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max_link = Keyword.get(options, :max_link, 0)
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arg = Keyword.get(options, :argument, 0)
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dst_field = Keyword.get(options, :dst_field)
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default_n_bits = Openflow.Match.Field.n_bits_of(dst_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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%NxMultipath{
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hash_field: hash_field,
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basis: basis,
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algorithm: alg,
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max_link: max_link,
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offset: ofs,
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n_bits: n_bits,
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argument: arg,
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dst_field: dst_field
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}
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end
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def to_binary(%NxMultipath{
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hash_field: hash_field,
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basis: basis,
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algorithm: alg,
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max_link: max_link,
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argument: arg,
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offset: ofs,
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n_bits: n_bits,
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dst_field: dst_field
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}) do
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hash_field_int = Openflow.Enums.to_int(hash_field, :nx_hash_fields)
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alg_int = Openflow.Enums.to_int(alg, :nx_mp_algorithm)
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dst_field_bin = Openflow.Match.codec_header(dst_field)
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ofs_nbits = ofs <<< 6 ||| n_bits - 1
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body =
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<<hash_field_int::16, basis::16, 0::size(2)-unit(8), alg_int::16, max_link::16, arg::32,
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0::size(2)-unit(8), ofs_nbits::16, dst_field_bin::4-bytes>>
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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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<<hash_field_int::16, basis::16, _::size(2)-unit(8), alg_int::16, max_link::16, arg::32,
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_::size(2)-unit(8), ofs::10, n_bits::6, dst_field_bin::4-bytes>> = body
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hash_field = Openflow.Enums.to_atom(hash_field_int, :nx_hash_fields)
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alg = Openflow.Enums.to_atom(alg_int, :nx_mp_algorithm)
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dst_field = Openflow.Match.codec_header(dst_field_bin)
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%NxMultipath{
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hash_field: hash_field,
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basis: basis,
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algorithm: alg,
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max_link: max_link,
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argument: arg,
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offset: ofs,
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n_bits: n_bits + 1,
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dst_field: dst_field
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}
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end
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end
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