set default tun name

go.mod

@@ -24,6 +24,7 @@ require (
 	github.com/sirupsen/logrus v1.8.1
 	github.com/songgao/water v0.0.0-20200317203138-2b4b6d7c09d8
 	github.com/spf13/viper v1.10.1
+	github.com/vishvananda/netlink v1.1.0
 	github.com/xtaci/kcp-go/v5 v5.6.1
 	github.com/xtaci/smux v1.5.16
 	github.com/xtaci/tcpraw v1.2.25
@@ -85,6 +86,7 @@ require (
 	github.com/templexxx/xorsimd v0.4.1 // indirect
 	github.com/tjfoc/gmsm v1.3.2 // indirect
 	github.com/ugorji/go/codec v1.2.7 // indirect
+	github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df // indirect
 	golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 // indirect
 	golang.org/x/text v0.3.7 // indirect
 	golang.org/x/tools v0.1.12 // indirect

go.sum

@@ -450,6 +450,10 @@ github.com/ugorji/go/codec v1.2.7 h1:YPXUKf7fYbp/y8xloBqZOw2qaVggbfwMlI8WM3wZUJ0
 github.com/ugorji/go/codec v1.2.7/go.mod h1:WGN1fab3R1fzQlVQTkfxVtIBhWDRqOviHU95kRgeqEY=
 github.com/viant/assertly v0.4.8/go.mod h1:aGifi++jvCrUaklKEKT0BU95igDNaqkvz+49uaYMPRU=
 github.com/viant/toolbox v0.24.0/go.mod h1:OxMCG57V0PXuIP2HNQrtJf2CjqdmbrOx5EkMILuUhzM=
+github.com/vishvananda/netlink v1.1.0 h1:1iyaYNBLmP6L0220aDnYQpo1QEV4t4hJ+xEEhhJH8j0=
+github.com/vishvananda/netlink v1.1.0/go.mod h1:cTgwzPIzzgDAYoQrMm0EdrjRUBkTqKYppBueQtXaqoE=
+github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df h1:OviZH7qLw/7ZovXvuNyL3XQl8UFofeikI1NW1Gypu7k=
+github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df/go.mod h1:JP3t17pCcGlemwknint6hfoeCVQrEMVwxRLRjXpq+BU=
 github.com/xtaci/kcp-go/v5 v5.6.1 h1:Pwn0aoeNSPF9dTS7IgiPXn0HEtaIlVb6y5UKWPsx8bI=
 github.com/xtaci/kcp-go/v5 v5.6.1/go.mod h1:W3kVPyNYwZ06p79dNwFWQOVFrdcBpDBsdyvK8moQrYo=
 github.com/xtaci/lossyconn v0.0.0-20190602105132-8df528c0c9ae h1:J0GxkO96kL4WF+AIT3M4mfUVinOCPgf2uUWYFUzN0sM=
@@ -612,6 +616,7 @@ golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190606203320-7fc4e5ec1444/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

listener/tun/tun_darwin.go

@@ -10,12 +10,19 @@ import (
 	tun_util "github.com/go-gost/x/internal/util/tun"
 )
 
+const (
+	defaultTunName = "utun"
+)
+
 func (l *tunListener) createTun() (ifce io.ReadWriteCloser, name string, ip net.IP, err error) {
 	ip, _, err = net.ParseCIDR(l.md.config.Net)
 	if err != nil {
 		return
 	}
 
+	if l.md.config.Name == "" {
+		l.md.config.Name = defaultTunName
+	}
 	ifce, name, err = l.createTunDevice()
 	if err != nil {
 		return

listener/tun/tun_linux.go

@@ -4,63 +4,63 @@ import (
 	"fmt"
 	"io"
 	"net"
-	"os/exec"
+
-	"strings"
+	"github.com/vishvananda/netlink"
 
 	tun_util "github.com/go-gost/x/internal/util/tun"
 )
 
-func (l *tunListener) createTun() (ifce io.ReadWriteCloser, name string, ip net.IP, err error) {
+func (l *tunListener) createTun() (dev io.ReadWriteCloser, name string, ip net.IP, err error) {
-	ip, _, err = net.ParseCIDR(l.md.config.Net)
+	ip, ipNet, err := net.ParseCIDR(l.md.config.Net)
 	if err != nil {
 		return
 	}
 
-	ifce, name, err = l.createTunDevice()
+	dev, name, err = l.createTunDevice()
 	if err != nil {
 		return
 	}
 
-	/*
+	ifce, err := net.InterfaceByName(name)
-		if err = l.exeCmd(fmt.Sprintf("ip link set dev %s mtu %d", name, l.md.config.MTU)); err != nil {
+	if err != nil {
-			l.logger.Warn(err)
+		return
-		}
-	*/
-
-	if err = l.exeCmd(fmt.Sprintf("ip address add %s dev %s", l.md.config.Net, name)); err != nil {
-		l.logger.Warn(err)
 	}
 
-	if err = l.exeCmd(fmt.Sprintf("ip link set dev %s up", name)); err != nil {
+	link, err := netlink.LinkByName(name)
-		l.logger.Warn(err)
+	if err != nil {
+		return
 	}
 
-	if err = l.addRoutes(name, l.md.config.Routes...); err != nil {
+	if err = netlink.AddrAdd(link, &netlink.Addr{
+		IPNet: &net.IPNet{
+			IP:   ip,
+			Mask: ipNet.Mask,
+		},
+	}); err != nil {
+		return
+	}
+	if err = netlink.LinkSetUp(link); err != nil {
+		return
+	}
+
+	if err = l.addRoutes(ifce, l.md.config.Routes...); err != nil {
 		return
 	}
 
 	return
 }
 
-func (l *tunListener) exeCmd(cmd string) error {
+func (l *tunListener) addRoutes(ifce *net.Interface, routes ...tun_util.Route) error {
-	l.logger.Debug(cmd)
-
-	args := strings.Split(cmd, " ")
-	if err := exec.Command(args[0], args[1:]...).Run(); err != nil {
-		return fmt.Errorf("%s: %v", cmd, err)
-	}
-
-	return nil
-}
-
-func (l *tunListener) addRoutes(ifName string, routes ...tun_util.Route) error {
 	for _, route := range routes {
-		cmd := fmt.Sprintf("ip route add %s dev %s", route.Net.String(), ifName)
+		r := netlink.Route{
-		l.logger.Debug(cmd)
+			Dst: &route.Net,
-
+			Gw:  route.Gateway,
-		args := strings.Split(cmd, " ")
+		}
-		if er := exec.Command(args[0], args[1:]...).Run(); er != nil {
+		if r.Gw == nil {
-			l.logger.Warnf("%s: %v", cmd, er)
+			r.LinkIndex = ifce.Index
+		}
+		if err := netlink.RouteReplace(&r); err != nil {
+			return fmt.Errorf("add route %v %v: %v", r.Dst, r.Gw, err)
 		}
 	}
 	return nil

listener/tun/tun_unix.go

@@ -12,12 +12,19 @@ import (
 	tun_util "github.com/go-gost/x/internal/util/tun"
 )
 
+const (
+	defaultTunName = "tun0"
+)
+
 func (l *tunListener) createTun() (ifce io.ReadWriteCloser, name string, ip net.IP, err error) {
 	ip, _, err = net.ParseCIDR(l.md.config.Net)
 	if err != nil {
 		return
 	}
 
+	if l.md.config.Name == "" {
+		l.md.config.Name = defaultTunName
+	}
 	ifce, name, err = l.createTunDevice()
 	if err != nil {
 		return