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akkoma/lib/pleroma/plugs/remote_ip.ex
rinpatch c46d035f7b rate limiter: disable based on if remote ip was found, not on if the plug was enabled
The current rate limiter disable logic won't trigger when the remote ip
is not forwarded, only when the remoteip plug is not enabled, which is
not the case on most instances since it's enabled by default. This
changes the behavior to warn and disable  when the remote ip was not forwarded,
even if the RemoteIP plug is enabled.

Also closes 
2020-03-16 00:15:21 +03:00

54 lines
1.3 KiB
Elixir

# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Plugs.RemoteIp do
@moduledoc """
This is a shim to call [`RemoteIp`](https://git.pleroma.social/pleroma/remote_ip) but with runtime configuration.
"""
import Plug.Conn
@behaviour Plug
@headers ~w[
x-forwarded-for
]
# https://en.wikipedia.org/wiki/Localhost
# https://en.wikipedia.org/wiki/Private_network
@reserved ~w[
127.0.0.0/8
::1/128
fc00::/7
10.0.0.0/8
172.16.0.0/12
192.168.0.0/16
]
def init(_), do: nil
def call(%{remote_ip: original_remote_ip} = conn, _) do
config = Pleroma.Config.get(__MODULE__, [])
if Keyword.get(config, :enabled, false) do
%{remote_ip: new_remote_ip} = conn = RemoteIp.call(conn, remote_ip_opts(config))
assign(conn, :remote_ip_found, original_remote_ip != new_remote_ip)
else
conn
end
end
defp remote_ip_opts(config) do
headers = config |> Keyword.get(:headers, @headers) |> MapSet.new()
reserved = Keyword.get(config, :reserved, @reserved)
proxies =
config
|> Keyword.get(:proxies, [])
|> Enum.concat(reserved)
|> Enum.map(&InetCidr.parse/1)
{headers, proxies}
end
end