90 lines
2.4 KiB
Elixir
90 lines
2.4 KiB
Elixir
defmodule Openflow.Action.NxConntrack do
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import Bitwise
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defstruct(
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flags: [],
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zone_src: nil,
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zone_imm: 0,
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zone_offset: nil,
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zone_n_bits: nil,
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recirc_table: 255,
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alg: 0,
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exec: []
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)
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@experimenter 0x00002320
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@nxast 35
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alias __MODULE__
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def new(options \\ []) do
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%NxConntrack{
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flags: options[:flags] || [],
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zone_src: options[:zone_src],
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zone_imm: options[:zone_imm] || 0,
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zone_offset: options[:zone_offset],
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zone_n_bits: options[:zone_n_bits],
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recirc_table: options[:recirc_table] || 255,
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alg: options[:alg] || 0,
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exec: options[:exec] || []
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}
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end
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def to_binary(%NxConntrack{
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flags: flags,
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zone_src: zone_src,
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zone_offset: zone_ofs,
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zone_n_bits: zone_n_bits,
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zone_imm: zone_imm,
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recirc_table: recirc_table,
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alg: alg,
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exec: exec
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}) do
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flags_int = Openflow.Enums.flags_to_int(flags, :nx_conntrack_flags)
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{src_bin, ofs_nbits} =
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if not is_nil(zone_src) do
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zone_src_bin = Openflow.Match.codec_header(zone_src)
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{zone_src_bin, zone_ofs <<< 6 ||| zone_n_bits - 1}
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else
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{<<0::32>>, zone_imm}
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end
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exec_bin = Openflow.Action.to_binary(exec)
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exp_body =
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<<@experimenter::32, @nxast::16, flags_int::16, src_bin::bytes, ofs_nbits::16,
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recirc_table::8, 0::size(3)-unit(8), alg::16, exec_bin::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(
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<<@experimenter::32, @nxast::16, flags_int::16, src_bin::4-bytes, ofs_nbits::16-bits,
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recirc_table::8, _::size(3)-unit(8), alg::16, exec_bin::bytes>>
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) do
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flags = Openflow.Enums.int_to_flags(flags_int, :nx_conntrack_flags)
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exec = Openflow.Action.read(exec_bin)
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ct = %NxConntrack{
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flags: flags,
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recirc_table: recirc_table,
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alg: alg,
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exec: exec
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}
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case src_bin do
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<<0::32>> ->
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<<zone_imm::16>> = ofs_nbits
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%{ct | zone_imm: zone_imm}
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binary when is_binary(binary) ->
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zone_src = Openflow.Match.codec_header(binary)
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<<ofs::10, n_bits::6>> = ofs_nbits
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%{ct | zone_src: zone_src, zone_offset: ofs, zone_n_bits: n_bits + 1}
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end
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end
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end
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