init

tuntap_darwin.go

@@ -0,0 +1,79 @@
+package gost
+
+import (
+	"errors"
+	"fmt"
+	"net"
+	"os/exec"
+	"strings"
+
+	"github.com/go-log/log"
+	"github.com/songgao/water"
+)
+
+func createTun(cfg TunConfig) (conn net.Conn, itf *net.Interface, err error) {
+	ip, _, err := net.ParseCIDR(cfg.Addr)
+	if err != nil {
+		return
+	}
+
+	ifce, err := water.New(water.Config{
+		DeviceType: water.TUN,
+	})
+	if err != nil {
+		return
+	}
+
+	mtu := cfg.MTU
+	if mtu <= 0 {
+		mtu = DefaultMTU
+	}
+
+	peer := cfg.Peer
+	if peer == "" {
+		peer = ip.String()
+	}
+	cmd := fmt.Sprintf("ifconfig %s inet %s %s mtu %d up",
+		ifce.Name(), cfg.Addr, peer, mtu)
+	log.Log("[tun]", cmd)
+	args := strings.Split(cmd, " ")
+	if er := exec.Command(args[0], args[1:]...).Run(); er != nil {
+		err = fmt.Errorf("%s: %v", cmd, er)
+		return
+	}
+
+	if err = addTunRoutes(ifce.Name(), cfg.Routes...); err != nil {
+		return
+	}
+
+	itf, err = net.InterfaceByName(ifce.Name())
+	if err != nil {
+		return
+	}
+
+	conn = &tunTapConn{
+		ifce: ifce,
+		addr: &net.IPAddr{IP: ip},
+	}
+	return
+}
+
+func createTap(cfg TapConfig) (conn net.Conn, itf *net.Interface, err error) {
+	err = errors.New("tap is not supported on darwin")
+	return
+}
+
+func addTunRoutes(ifName string, routes ...IPRoute) error {
+	for _, route := range routes {
+		if route.Dest == nil {
+			continue
+		}
+		cmd := fmt.Sprintf("route add -net %s -interface %s", route.Dest.String(), ifName)
+		log.Log("[tun]", cmd)
+		args := strings.Split(cmd, " ")
+		if er := exec.Command(args[0], args[1:]...).Run(); er != nil {
+			return fmt.Errorf("%s: %v", cmd, er)
+		}
+	}
+	return nil
+}