89 lines
2 KiB
Elixir
89 lines
2 KiB
Elixir
defmodule Openflow.Multipart.Group.Reply do
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defstruct(
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version: 4,
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xid: 0,
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# virtual field
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datapath_id: nil,
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aux_id: nil,
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flags: [],
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groups: []
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)
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alias __MODULE__
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def ofp_type, do: 18
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def new(groups \\ []) do
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%Reply{groups: groups}
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end
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def read(<<groups_bin::bytes>>) do
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groups = Openflow.Multipart.Group.read(groups_bin)
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%Reply{groups: groups}
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end
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def append_body(%Reply{groups: groups} = message, %Reply{flags: [:more], groups: continue}) do
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%{message | groups: [continue | groups]}
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end
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def append_body(%Reply{groups: groups} = message, %Reply{flags: [], groups: continue}) do
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new_groups =
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[continue | groups]
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|> Enum.reverse()
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|> List.flatten()
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%{message | groups: new_groups}
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end
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end
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defmodule Openflow.Multipart.Group do
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defstruct(
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group_id: 0,
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ref_count: 0,
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packet_count: 0,
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byte_count: 0,
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duration_sec: 0,
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duration_nsec: 0,
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bucket_stats: []
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)
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@ofp_group_stats_size 40
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alias __MODULE__
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def read(binary) do
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do_read([], binary)
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end
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# private functions
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defp do_read(acc, ""), do: Enum.reverse(acc)
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defp do_read(acc, <<length::16, _binary::bytes>> = binary) do
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<<group_bin::size(length)-bytes, rest::bytes>> = binary
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do_read([codec(group_bin) | acc], rest)
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end
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defp codec(
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<<length::16, _::size(2)-unit(8), group_id::32, ref_count::32, _::size(4)-unit(8),
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packet_count::64, byte_count::64, duration_sec::32, duration_nsec::32, tail::bytes>>
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) do
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bucket_stats_size = length - @ofp_group_stats_size
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<<bucket_stats_bin::size(bucket_stats_size)-bytes, _rest::bytes>> = tail
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bucket_stats =
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for <<packet_count::64, byte_count::64 <- bucket_stats_bin>> do
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%{packet_count: packet_count, byte_count: byte_count}
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end
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%Group{
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group_id: group_id,
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ref_count: ref_count,
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packet_count: packet_count,
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byte_count: byte_count,
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duration_sec: duration_sec,
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duration_nsec: duration_nsec,
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bucket_stats: bucket_stats
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}
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end
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end
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