Support access UNIX-DOMAIN socket server application

README.md

@@ -62,7 +62,7 @@ Start up server side endpoint
 Start up client side endpoint
 
 ```
-./quictun-client --listen-on tcp:127.0.0.1:6500 --server-endpoint 172.18.31.36:7500 --token 172.18.30.117:22 --insecure-skip-verify True
+./quictun-client --listen-on tcp:127.0.0.1:6500 --server-endpoint 172.18.31.36:7500 --token tcp:172.18.30.117:22 --insecure-skip-verify True
 ```
 
 **Note:** The value specified by `--token` used to tell `quictun-server` the application address that the client want to access.

client/cmd/main.go

@@ -65,7 +65,7 @@ func main() {
 	defer klog.Flush()
 	rootCmd.PersistentFlags().StringVar(&localSocket, "listen-on", "tcp:127.0.0.1:6500", "The socket that the client side endpoint listen on.")
 	rootCmd.PersistentFlags().StringVar(&serverEndpointSocket, "server-endpoint", "", "The server side endpoint address, example: example.com:6565")
-	rootCmd.PersistentFlags().StringVar(&token, "token", "", "Used to tell the server endpoint which server app we want to connect.")
+	rootCmd.PersistentFlags().StringVar(&token, "token", "", "Used to tell the server endpoint which server app we want to connect, example: tcp:10.0.0.1:1234")
 	rootCmd.PersistentFlags().StringVar(&certFile, "cert-file", "", "The certificate file path, this is required if the --verify-client is True in server endpoint.")
 	rootCmd.PersistentFlags().StringVar(&keyFile, "key-file", "", "The private key file path, this is required if the --verify-client is True in server endpoint.")
 	rootCmd.PersistentFlags().BoolVar(&insecureSkipVerify, "insecure-skip-verify", false, "Whether skip verify server endpoint.")

server/server.go

@@ -5,6 +5,7 @@ import (
 	"crypto/tls"
 	"io"
 	"net"
+	"strings"
 	"sync"
 
 	"github.com/kungze/quic-tun/pkg/constants"
@@ -70,7 +71,8 @@ func (s *ServerEndpoint) handshake(stream *quic.Stream) (net.Conn, error) {
 		return nil, err
 	}
 	klog.InfoS("starting connect to server app", "server app", hsh.ReceiveData)
-	conn, err := net.Dial("tcp", hsh.ReceiveData)
+	sockets := strings.Split(hsh.ReceiveData, ":")
+	conn, err := net.Dial(strings.ToLower(sockets[0]), strings.Join(sockets[1:], ":"))
 	if err != nil {
 		klog.ErrorS(err, "Failed to dial server app", "server address", hsh.ReceiveData)
 		hsh.SendData = []byte{constants.HandshakeFailure}