go-socks5

Provides the socks5 package that implements a SOCKS5. SOCKS (Secure Sockets) is used to route traffic between a client and server through an intermediate proxy layer. This can be used to bypass firewalls or NATs.

Feature

The package has the following features:

• Support client(under ccsocks5 directory) and server(under root directory)
• Support TCP/UDP and IPv4/IPv6
• Unit tests
• "No Auth" mode
• User/Password authentication optional user addr limit
• Support for the CONNECT command
• Support for the ASSOCIATE command
• Rules to do granular filtering of commands
• Custom DNS resolution
• Custom goroutine pool
• buffer pool design and optional custom buffer pool
• Custom logger

TODO

The package still needs the following:

• Support for the BIND command

Installation

Use go get.

    go get github.com/thinkgos/go-socks5

Then import the socks5 server package into your own code.

    import modbus "github.com/thinkgos/go-socks5"

or

import the socks5 client package into your own code.

    import modbus "github.com/thinkgos/go-socks5/ccsocks5"

Example

Below is a simple example of usage

    // Server: 

    // Create a SOCKS5 server
    server := socks5.NewServer()
    
    // Create SOCKS5 proxy on localhost port 8000
    if err := server.ListenAndServe("tcp", ":8000"); err != nil {
      panic(err)
    }

   // Client: 
	client := ccsocks5.NewClient(
		"127.0.0.1:10800",
		ccsocks5.WithKeepAlivePeriod(time.Second*30),
	)
	conn, err := client.Dial("tcp", "127.0.0.1:12345") // server you want to visitor
	if err != nil {
		panic(err)
	}
	conn.Write([]byte("hahaha"))
	time.Sleep(time.Second)

Reference

• rfc1928
• original armon go-sock5