Change signature of socks5 dialer

mtglib/network/interfaces.go

 )
 
 type Dialer interface {
+	Dial(network, address string) (net.Conn, error)
 	DialContext(ctx context.Context, network, address string) (net.Conn, error)
 }

mtglib/network/socks5.go

 import (
 	"fmt"
 	"net/url"
-	"time"
 
 	"golang.org/x/net/proxy"
 )
 
-func NewSocks5Dialer(proxyURL *url.URL, timeout time.Duration, bufferSize int) (Dialer, error) {
-	dialer, err := NewDefaultDialer(timeout, bufferSize)
-	if err != nil {
-		return nil, fmt.Errorf("cannot initialize base dialer: %w", err)
-	}
-
-	rv, err := proxy.FromURL(proxyURL, dialer.(*defaultDialer))
+func NewSocks5Dialer(proxyURL *url.URL, base Dialer) (Dialer, error) {
+	rv, err := proxy.FromURL(proxyURL, base)
 	if err != nil {
 		return nil, fmt.Errorf("cannot initialize socks5 proxy dialer: %w", err)
 	}

mtglib/network/socks5_test.go

 type Socks5TestSuite struct {
 	HTTPServerTestSuite
 
+	baseDialer    network.Dialer
 	socksListener net.Listener
 	socksProxy    *socks5.Server
 }
 
 	suite.socksProxy, _ = socks5.New(&socksConf)
 	suite.socksListener, _ = net.Listen("tcp", "127.0.0.1:0")
+    suite.baseDialer, _ = network.NewDefaultDialer(0, 0)
 
 	go suite.socksProxy.Serve(suite.socksListener)
 }
 		User:   url.UserPassword("user2", "password"),
 		Host:   suite.socksListener.Addr().String(),
 	}
-	dialer, _ := network.NewSocks5Dialer(proxyURL, 0, 0)
+	dialer, _ := network.NewSocks5Dialer(proxyURL, suite.baseDialer)
 
 	httpClient := http.Client{
 		Transport: &http.Transport{
 		User:   url.UserPassword("user", "password"),
 		Host:   suite.socksListener.Addr().String(),
 	}
-	dialer, _ := network.NewSocks5Dialer(proxyURL, 0, 0)
+	dialer, _ := network.NewSocks5Dialer(proxyURL, suite.baseDialer)
 
 	httpClient := http.Client{
 		Transport: &http.Transport{