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phoenix_ddos

1.1.9
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High performance application-layer DDoS protection for Elixir Phoenix

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phoenix_ddos lib phoenix_ddos zzz ip.ex_
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lib/phoenix_ddos/zzz/ip.ex_ 

defmodule PhoenixDDoS.Ip do

  @moduledoc """

  helper with ip/subnet match



  ## Examples

    iex> IO.puts(1)

    :ok



  ip erlang





  references

  https://www.ibm.com/docs/en/ts3500-tape-library?topic=formats-subnet-masks-ipv4-prefixes-ipv6

  """



  use Bitwise, only_operators: true



  # {{sa, sb, sc, sd}, netmask}



  # ipv4

  def ip_in_subnet?({a, b, c, d}, subnet_mask) do

  end



  # ipv6

  def ip_in_subnet?({a, b, c, d, _, _, _, _}, {a, b, c, d}) do

  end



  def ip_in_subnet?({_, _, _, _, _, _, _, _}, {_, _, _, _}), do: false



  def in_safelist?(ip) do

    # safelist

  end



  # "1.2.3.4/24"

  def netmask!(subnet) do

    [ip, range] = subnet |> String.split("/")



    with [ip, range] <- subnet |> String.split("/"),

         {range, ""} <- Integer.parse(range),

         true <- range in 0..32 do

      case ip do

        # v4

        {a, b, c, d} ->

          a * 256 * 256 * 256 + b * 256 * 256 + c * 256 + d &&& 1



        # v6

        {a, b, c, d, e, f, g, h} ->

          nil

      end

    else

      raise "invalid subnet #{subnet}"

    end

  end



  def in_range(ip, ip, range) do

  end



  def in_blocklist?(ip) do

    # safelist

  end



  # <<f::binary-size(1), _::binary>>

end



# {0..65535,

# 0..65535,

# 0..65535,

# 0..65535,

# 0..65535,

# 0..65535,

# 0..65535,

# 0..65535}



# moduledoc toussa