77 lines
2.1 KiB
Elixir
77 lines
2.1 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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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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default_n_bits = Openflow.Match.Field.n_bits_of(dst_field)
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%NxMultipath{
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hash_field: options[:hash_field] || :eth_src,
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basis: options[:basis] || 0,
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algorithm: options[:algorithm] || :modulo_n,
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max_link: options[:max_link] || 0,
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offset: options[:offset] || 0,
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n_bits: options[:n_bits] || default_n_bits,
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argument: options[:argument] || 0,
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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{} = multipath) do
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hash_field_int = Openflow.Enums.to_int(multipath.hash_field, :nx_hash_fields)
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alg_int = Openflow.Enums.to_int(multipath.algorithm, :nx_mp_algorithm)
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dst_field_bin = Openflow.Match.codec_header(multipath.dst_field)
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ofs_nbits = multipath.offset <<< 6 ||| multipath.n_bits - 1
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Experimenter.pack_exp_header(<<
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@experimenter::32,
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@nxast::16,
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hash_field_int::16,
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multipath.basis::16,
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0::size(2)-unit(8),
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alg_int::16,
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multipath.max_link::16,
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multipath.argument::32,
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0::size(2)-unit(8),
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ofs_nbits::16,
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dst_field_bin::4-bytes
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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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<<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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