tres/lib/openflow/actions/nx_bundle_load.ex
2017-11-13 22:52:53 +09:00

102 lines
3.7 KiB
Elixir

defmodule Openflow.Action.NxBundleLoad do
import Bitwise
defstruct(
algorithm: :active_backup,
hash_field: :eth_src,
basis: 0,
slave_type: :nx_in_port,
n_slaves: 0,
slaves: [],
offset: 0,
n_bits: 0,
dst_field: nil
)
@experimenter 0x00002320
@nxast 13
alias __MODULE__
def new(options) do
hash_field = Keyword.get(options, :hash_field, :eth_src)
basis = Keyword.get(options, :basis, 0)
alg = Keyword.get(options, :algorithm, :active_backup)
slaves = Keyword.get(options, :slaves, [])
dst_field = Keyword.get(options, :dst_field)
default_n_bits = Openflow.Match.Field.n_bits_of(dst_field)
n_bits = Keyword.get(options, :n_bits, default_n_bits)
ofs = Keyword.get(options, :offset, 0)
%NxBundleLoad{algorithm: alg,
hash_field: hash_field,
basis: basis,
n_slaves: length(slaves),
slaves: slaves,
offset: ofs,
n_bits: n_bits,
dst_field: dst_field}
end
def to_binary(%NxBundleLoad{algorithm: alg,
hash_field: hash_field,
basis: basis,
slave_type: slave_type,
n_slaves: n_slaves,
slaves: slaves,
offset: ofs,
n_bits: n_bits,
dst_field: dst_field}) do
hash_field_int = Openflow.Enums.to_int(hash_field, :nx_hash_fields)
alg_int = Openflow.Enums.to_int(alg, :nx_bd_algorithm)
slave_type_bin = Openflow.Match.codec_header(slave_type)
slaves_bin = codec_slaves(slaves)
ofs_nbits = (ofs <<< 6) ||| (n_bits - 1)
dst_field_bin = Openflow.Match.codec_header(dst_field)
body = <<alg_int::16, hash_field_int::16, basis::16,
slave_type_bin::4-bytes, n_slaves::16, ofs_nbits::16,
dst_field_bin::4-bytes, 0::32, slaves_bin::bytes>>
exp_body = <<@experimenter::32, @nxast::16, body::bytes>>
exp_body_size = byte_size(exp_body)
padding_length = Openflow.Utils.padding(4 + exp_body_size, 8)
length = 4 + exp_body_size + padding_length
<<0xffff::16, length::16, exp_body::bytes, 0::size(padding_length)-unit(8)>>
end
def read(<<@experimenter::32, @nxast::16, body::bytes>>) do
<<alg_int::16, hash_field_int::16, basis::16,
slave_type_bin::4-bytes, n_slaves::16, ofs::10, n_bits::6,
dst_field_bin::4-bytes, _reserved::32, rest::bytes>> = body
slave_len = n_slaves * 2
<<slaves_bin::size(slave_len)-bytes, _::bytes>> = rest
alg = Openflow.Enums.to_atom(alg_int, :nx_bd_algorithm)
hash_field = Openflow.Enums.to_atom(hash_field_int, :nx_hash_fields)
slave_type = Openflow.Match.codec_header(slave_type_bin)
slaves = codec_slaves(slaves_bin)
n_slaves = length(slaves)
dst_field = Openflow.Match.codec_header(dst_field_bin)
%NxBundleLoad{algorithm: alg,
hash_field: hash_field,
basis: basis,
slave_type: slave_type,
n_slaves: n_slaves,
slaves: slaves,
offset: ofs,
n_bits: n_bits + 1,
dst_field: dst_field}
end
# private functions
defp codec_slaves(slaves) when is_list(slaves) do
slaves1 = for slave <- slaves do
slave_int = Openflow.Utils.get_enum(slave, :openflow10_port_no)
<<slave_int::16>>
end
Enum.join(slaves1, "")
end
defp codec_slaves(slaves) when is_binary(slaves) do
for <<slave_int::16 <- slaves>> do
Openflow.Utils.get_enum(slave_int, :openflow10_port_no)
end
end
end