Feature: add custom DNS support (#56)

proxy/redir/tcp.go

@@ -4,6 +4,7 @@ import (
 	"net"
 
 	"github.com/Dreamacro/clash/adapters/inbound"
+	C "github.com/Dreamacro/clash/constant"
 	"github.com/Dreamacro/clash/log"
 	"github.com/Dreamacro/clash/tunnel"
 )
@@ -12,18 +13,18 @@ var (
 	tun = tunnel.Instance()
 )
 
-type redirListener struct {
+type RedirListener struct {
 	net.Listener
 	address string
 	closed  bool
 }
 
-func NewRedirProxy(addr string) (*redirListener, error) {
+func NewRedirProxy(addr string) (*RedirListener, error) {
 	l, err := net.Listen("tcp", addr)
 	if err != nil {
 		return nil, err
 	}
-	rl := &redirListener{l, addr, false}
+	rl := &RedirListener{l, addr, false}
 
 	go func() {
 		log.Infoln("Redir proxy listening at: %s", addr)
@@ -42,12 +43,12 @@ func NewRedirProxy(addr string) (*redirListener, error) {
 	return rl, nil
 }
 
-func (l *redirListener) Close() {
+func (l *RedirListener) Close() {
 	l.closed = true
 	l.Listener.Close()
 }
 
-func (l *redirListener) Address() string {
+func (l *RedirListener) Address() string {
 	return l.address
 }
 
@@ -58,5 +59,5 @@ func handleRedir(conn net.Conn) {
 		return
 	}
 	conn.(*net.TCPConn).SetKeepAlive(true)
-	tun.Add(adapters.NewSocket(target, conn))
+	tun.Add(adapters.NewSocket(target, conn, C.REDIR))
 }