Socks5 protocol

Implementation of socks 5 version on node js

Does't support ipv6 address and udp/bind methods

Requirements

• Node.js v16.0+

Installation

  npm install socks-proxy-v5

TODO

• [ ] IPV6 support
• [ ] UDP ASSOCIATE
• [ ] BIND

Server

Create simple server

const { createServer } = require("socks-proxy-v5");

const server = createServer();

server.listen(1080); // any port

Create server with authentication

const { createServer } = require("socks-proxy-v5");

const server = createServer({
  authenticate(login, password) {
    // verify name/password
    if (login !== "foo" || password !== "bar") {
      console.log("authentication failed", login);
      return false; 
      // authentication failed
    }
    console.log(`user ${login} connect`);
    // return successful authentication
    return true;
  }
});

server.listen(1080);

Create server with filter

const { createServer }  = require("socks-proxy-v5");

const setAddr = new Set(["tools.ietf.org", "github.com", "2ip.ru"]);

const server = createServer({
  filter(addr) {
    const result = !setAddr.has(addr); 
    if(!result) console.log(`host ${addr} unreachable`);
    return result;
  }
});

createServer(options)

options - is an object that describes how to use a proxy server. (optional)

• timeout - type number. Sets the socket to timeout after timeout milliseconds of inactivity on the socket. Default set 2 minute. If timeout is 0, then the existing idle timeout is disabled

  const { createServer }  = require("socks-proxy-v5");
  const server = createServer({
    timeout: 10000 // 10 second
  });

  After timeout the socket will be destroyed

• authenticate(login, password) - type function. Have two argument type string.Returns true if the user is authenticated, else false
  You can make queries to the database, create arrays of data, log users, you are limited only by your imagination

• filter(address) - type function. Have one argument, type string. Returns true if the user has been filtered, else false
  You can use regular expressions, iterating over an array, or using new data types as an example (new Set), queries to the data base

Server Events (optional)

• connect
  Emitted when a socket connection is successfully established

  server.on("connect", info =>
    console.log(`connected to remote server at ${info.addr}:${info.port}`)
  );

• connection
  Emitted when a new connection is made. socket is an instance of net.Socket

  server.on("connection", socket => {
    console.log("new socks connection", socket.remoteAddress, socket.remotePort);
  });

• error
  Emitted when an error occurs.

  server.on("error", error => {
    console.error(error);
  });

• data
  Emitted when data is received. The argument data will be a Buffer or String

  server.on("data", data => console.log(data));

• listening
  Emitted when the server has been bound after calling server.listen()

  server.listen(1080);
  
  server.on("listening", () => {
    console.log(
      `server listening ${server.address().address}:${server.address().port}`
    );
  });

server.listen(options)

work like server.listen()

See more

RFC1928, RFC1929
examples

License

MIT