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River - network tunneling

River is a proxy client & server with cryptography. Everything is pure .Net CLR without external dependancies.

Shipped in 2 ways:

1) River.dll in NuGet - is a .Net Standard 2.0 library for any cross platform project

2) River.exe for Windows - is a .Net Framwork 4.8 application for Windows

Application Usage

The commandline inspired by gost project:

Run SOCKS server:

river -L socks://0.0.0.0:1080

Run ShadowSocks server:

river -L ss://chacha20:password@0.0.0.0:8338

Proxy Chain - a list of forwarders:

river -L socks://0.0.0.0:1080 -F socks4://rhop2:1080 -F socks4://10.7.1.1:1080

Library Usage

NuGet: https://www.nuget.org/packages/River/

Installation: Install-Package River

How to wrap your existing TCP connection to SOCKS proxy:

Original:

var cli = new TcpClient("httpbin.org", 80);
var stream = cli.GetStream();

Change to:

var stream = new Socks4ClientStream("proxyserver", 1080, "httpbin.org", 80);

Or if you need TcpClient to proxy:

var cli = new TcpClient("proxyserver", 1080);
var stream = new Socks4ClientStream(cli.GetStream(), "httpbin.org", 80);

Proxy Chain:

var step1 = new Socks4ClientStream();
step1.Plug("127.0.0.1", 1080); // 1st proxy
step1.Route("127.0.0.1", 1081); // 2nd proxy
var step2 = new Socks4ClientStream();
step2.Plug(step1);
step2.Route("127.0.0.1", 1082); // 3rd proxy
var step3 = new Socks4ClientStream(step2, "httpbin.org", 80); // you can do same in constructor - route to destination
var stream = step3;