akkoma/lib/pleroma/plugs/remote_ip.ex
rinpatch 889965141a RemoteIp: only trust X-Forwarded-For
Our nginx config will happily pass `Forwarded`/`X-Real-IP` from the
client. Caddy, Apache and Varnish pass `X-Forwarded-For` as well anyway.
2020-01-30 00:06:58 +03:00

51 lines
1.1 KiB
Elixir

# Pleroma: A lightweight social networking server
# Copyright © 2017-2019 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.
"""
@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(conn, _) do
config = Pleroma.Config.get(__MODULE__, [])
if Keyword.get(config, :enabled, false) do
RemoteIp.call(conn, remote_ip_opts(config))
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