A reverse UDP proxy for Teeworlds game play write by Golang.

You can download the binary build of win64 and linux64 from release page, or you can build it by yourself.

• Golang version Build:

go get github.com/sirupsen/logrus
go build udp_proxy.go

• Golang version Run:

.\udp_proxy.exe <local port> <remote ip> <remote port> (Windows)
./udp_proxy <local port> <remote ip> <remote port> (Linux)

If you want to deploy the golang version proxy into a docker container, you can build the docker image by yourself:

go mod init
go build udp_proxy.go
go mod vendor
docker build -t udp_proxy:1.0.0 .
docker run -d -p <host local port>:<container local port>/udp --name my_udp_proxy udp_proxy:1.0.0 ./udp_proxy <container local port> <remote ip> <remote port>

Or you could use the docker image build by me in release page:

docker load < ./udp_proxy_docker.tar
docker run -d -p <host local port>:<container local port>/udp --name my_udp_proxy udp_proxy:1.0.0 ./udp_proxy <container local port> <remote ip> <remote port>

After runned this Script in your server, you can connect the game server "remote_ip:remote:port" by "your_server_ip:local_port"

The default maximum number of user(inculding dummy) at the same time is 4. It is limit by the Teeworlds server setting "sv_max_clients_per_ip", which default value is 4.

In order to improve performance, I rewrite the python code in golang. After the python version is deployed locally, when the client connects to the local server through a reverse proxy, the in-game ping value is about 24, while the relative go version ping value is only about 3, which greatly improves performance.

Python version should only use for proof of concept.

• Python version Usage:

python3 udp_proxy.py <local port> <remote ip> <remote port>

原理： 假设你的机器为A,游戏服务器为B,A<->B之间通讯质量比较差，丢包率为10%。

现在我建立一个B的反向代理服务器C，可以把A发送到C的数据转发给B，B返回的数据则通过C返回给A，即A<->C<->B

如果C到A和B的通讯质量都比较好(前提条件)，A<->C的丢包率只有1%，B<->C丢包率只有1%，那样的话应该能降低整体丢包率。

用的时候只需要把主机地址这一栏改为我的反向代理服务器的地址

只能同时供4个玩家一起使用（包含dummy），这个受到Teeworlds服务器的sv_max_clients_per_ip的限制。

在部署时需要确认<local port>端口(用于和client通信)，和[22223, 22800]的端口(随机取若干个用来和server通信)可以通过防火墙收发数据。腾讯云和阿里云需要额外在网页控制台配置。普通linux服务器可以通过改iptables配置。

为了提高性能，把python代码用golang重新写了一遍。python版本部署在本地后，用客户端通过反向代理连接本地服务器时，游戏内ping值为24左右，而相对的go版本ping值仅为3左右，大大提高了性能。