Erlang mtproto proxy

This part of code was extracted from @socksy_bot.

Features

• Promoted channels! See mtproto_proxy_app.src tag option.
• "secure" randomized-packet-size protocol (34-symbol secrets starting with 'dd') to prevent detection by DPI
• Multiple ports with unique secret and promo tag for each port
• Automatic configuration reload (no need for restarts once per day)
• Very high performance - can handle tens of thousands connections!
• Small codebase compared to oficial one
• A lots of metrics could be exported (optional)

How to start

Install deps (ubuntu 18.04)

sudo apt install erlang-nox erlang-dev build-essential

You need Erlang version 20 or higher! If your version is older, please, check Erlang solutions esl-erlang package or use kerl.

Get the code:

git clone https://github.com/seriyps/mtproto_proxy.git
cd mtproto_proxy/

Update settings (see Settings).

Compile:

./rebar3 release

Make sure your limit of open files is high enough! Check ulimit -n. You may need to tweak your /etc/security/limits.conf or systemd LimitNOFILE to be able to handle more than ~500 clients.

Start with interactive console (recommended for testing)

./_build/default/rel/mtp_proxy/bin/mtp_proxy console

Or start in foreground (recommended for systemd service)

./_build/default/rel/mtp_proxy/bin/mtp_proxy foreground

Or start in background (to run as a service without supervision)

./_build/default/rel/mtp_proxy/bin/mtp_proxy start

Stop proxy started in background

./_build/default/rel/mtp_proxy/bin/mtp_proxy stop

Logs can be found at

./_build/default/rel/mtp_proxy/log/

Settings

See src/mtproto_proxy.app.src.

Secret key will be printed on start.

Helpers

Number of connections in background mode

./_build/default/rel/mtp_proxy/bin/mtp_proxy eval 'lists:sum([proplists:get_value(all_connections, L) || {_, L} <- ranch:info()]).'