Use native dialer to communicate with fronting domain

internal/testlib/mtglib_network_mock.go

@@ -2,6 +2,7 @@ package testlib
 
 import (
 	"context"
+	"net"
 	"net/http"
 
 	"github.com/9seconds/mtg/v2/essentials"
@@ -24,6 +25,10 @@ func (m *MtglibNetworkMock) DialContext(ctx context.Context, network, address st
 	return args.Get(0).(essentials.Conn), args.Error(1) //nolint: wrapcheck, forcetypeassert
 }
 
+func (m *MtglibNetworkMock) NativeDialer() *net.Dialer {
+	return m.Called().Get(0).(*net.Dialer)
+}
+
 func (m *MtglibNetworkMock) MakeHTTPClient(dialFunc func(ctx context.Context,
 	network, address string) (essentials.Conn, error),
 ) *http.Client {

mtglib/proxy.go

@@ -279,13 +279,16 @@ func (p *Proxy) doDomainFronting(ctx *streamContext, conn *connRewind) {
 	p.eventStream.Send(p.ctx, NewEventDomainFronting(ctx.streamID))
 	conn.Rewind()
 
-	frontConn, err := p.network.DialContext(ctx, "tcp", p.DomainFrontingAddress())
+	nativeDialer := p.network.NativeDialer()
+	fConn, err := nativeDialer.DialContext(ctx, "tcp", p.DomainFrontingAddress())
 	if err != nil {
 		p.logger.WarningError("cannot dial to the fronting domain", err)
 
 		return
 	}
 
+	frontConn := essentials.WrapNetConn(fConn)
+
 	if p.domainFrontingProxyProtocol {
 		frontConn = newConnProxyProtocol(ctx.clientConn, frontConn)
 	}

network/v2/base_network_test.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"testing"
 
+	"github.com/9seconds/mtg/v2/mtglib"
 	"github.com/9seconds/mtg/v2/network/v2"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/suite"
@@ -12,7 +13,7 @@ import (
 type BaseNetworkTestSuite struct {
 	EchoServerTestSuite
 
-	net network.Network
+	net mtglib.Network
 }
 
 func (suite *BaseNetworkTestSuite) SetupSuite() {

network/v2/socks_proxy_test.go

@@ -6,6 +6,7 @@ import (
 	"sync"
 	"testing"
 
+	"github.com/9seconds/mtg/v2/mtglib"
 	"github.com/9seconds/mtg/v2/network/v2"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -17,7 +18,7 @@ type SocksProxyTestSuite struct {
 	EchoServerTestSuite
 
 	wg          sync.WaitGroup
-	baseNetwork network.Network
+	baseNetwork mtglib.Network
 
 	noAuthURL *url.URL
 	authURL   *url.URL
@@ -85,7 +86,7 @@ func (suite *SocksProxyTestSuite) TestRead() {
 
 	for name, proxies := range testData {
 		suite.T().Run(name, func(t *testing.T) {
-			proxyNetworks := []network.Network{}
+			proxyNetworks := []mtglib.Network{}
 
 			for _, u := range proxies {
 				value, err := network.NewProxyNetwork(suite.baseNetwork, u)