91 lines
2.5 KiB
Elixir
91 lines
2.5 KiB
Elixir
defmodule Openflow.Action.NxBundle do
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defstruct(
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algorithm: :active_backup,
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hash_field: :eth_src,
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basis: 0,
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slave_type: :nx_in_port,
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n_slaves: 0,
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slaves: []
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)
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@experimenter 0x00002320
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@nxast 12
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alias __MODULE__
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def new(options) do
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slaves = options[:slaves] || []
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%NxBundle{
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algorithm: options[:algorithm] || :active_backup,
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hash_field: options[:hash_field] || :eth_src,
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basis: options[:basis] || 0,
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n_slaves: length(slaves),
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slaves: slaves
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}
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end
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def to_binary(%NxBundle{
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algorithm: alg,
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hash_field: hash_field,
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basis: basis,
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slave_type: slave_type,
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n_slaves: n_slaves,
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slaves: slaves
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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_bd_algorithm)
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slave_type_bin = Openflow.Match.codec_header(slave_type)
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slaves_bin = codec_slaves(slaves)
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body =
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<<alg_int::16, hash_field_int::16, basis::16, slave_type_bin::4-bytes, n_slaves::16, 0::16,
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0::size(4)-unit(8), 0::32, slaves_bin::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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<<alg_int::16, hash_field_int::16, basis::16, slave_type_bin::4-bytes, n_slaves::16, _::16,
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_::32, _::32, rest::bytes>> = body
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slave_len = n_slaves * 2
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<<slaves_bin::size(slave_len)-bytes, _::bytes>> = rest
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alg = Openflow.Enums.to_atom(alg_int, :nx_bd_algorithm)
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hash_field = Openflow.Enums.to_atom(hash_field_int, :nx_hash_fields)
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slave_type = Openflow.Match.codec_header(slave_type_bin)
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slaves = codec_slaves(slaves_bin)
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n_slaves = length(slaves)
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%NxBundle{
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algorithm: alg,
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hash_field: hash_field,
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basis: basis,
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slave_type: slave_type,
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n_slaves: n_slaves,
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slaves: slaves
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}
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end
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# private functions
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defp codec_slaves(slaves) when is_list(slaves) do
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slaves1 =
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for slave <- slaves do
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slave_int = Openflow.Utils.get_enum(slave, :openflow10_port_no)
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<<slave_int::16>>
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end
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Enum.join(slaves1, "")
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end
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defp codec_slaves(slaves) when is_binary(slaves) do
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for <<slave_int::16 <- slaves>> do
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Openflow.Utils.get_enum(slave_int, :openflow10_port_no)
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end
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end
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end
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