github.com/yiyuezhuo/xisocks2

Yet another toy proxy

Yet another toy proxy which provide authentication and removing verbose handshake procedure as much as possible, compared to previous version.

Protocol

This protocol is inspired by v2ray and trojan.

All socks5/https handshake will be treated successed to accelerate transport. When proxed app such as browser, client start a TLS connection to connect remote server outside GFW. When TLS connection have been established, a header with payload will be sent to server to specify TCP CONNECT destination and payload to reduce packet required to transport.

+----------------+--------------+--------------+-------------+---------------+
|   len(TOKEN)   |    TOKEN     |  len(host)   |     host    |   Payload     |
+-------------------------------+--------------+-----------------------------+
|     1 byte     | 1-255 bytes  |   1 byte     | 1-255 bytes |      *        |
+----------------+--------------+--------------+-------------+---------------+

Fake website

When server take a wrong header format, it will forward the suspicious request to a local http server. So that you and GFW internet agent may find that a website is hosted in that url if just access it from browser.

My personal interest is to show a sad panda to GFW internet agent, or you may launch a jupyter notebook server, which provide powerfull screen-like terminor.

Build

$ go get github.com/gorilla/websocket
$ go get github.com/yiyuezhuo/xisocks2

Enter project root

$ make

Usage in PC

• Download respective version into your local computer(client) and VPS(server) from release page.
• In client, replace config-client.json item value corresponding to ProxyURL with your hostname such as "xisocks2.com", which have been "protected" by CDN such as cloudflare. Thus CCP internet cops can't find your real IP.
• See some TLS tutorials to get server.crt and server.key and placing them into server root.
• In client, run client.exe(windows) or ./client(linux)
• In server, run server.exe(windows) or ./server(linux)

Usage in Android

In addtiontion to PC usage, the android version is just compiled using GOARCH=arm64 and GOOS=linux. No UI is provided, you can use termux and Postern to help you use xisocks2 just like usage for other console-oriented applications such as v2ray-core. Note Data Sniffer in Rule in Posternshould be enable.