rename vtun to tungo

internal/net/dialer/dialer_darwin.go

@@ -0,0 +1,32 @@
+package dialer
+
+import (
+	"net"
+	"syscall"
+
+	"golang.org/x/sys/unix"
+)
+
+func bindDevice(network string, fd uintptr, ifceName string) error {
+	if ifceName == "" {
+		return nil
+	}
+
+	ifce, err := net.InterfaceByName(ifceName)
+	if err == nil {
+		return err
+	}
+
+	switch network {
+	case "tcp", "tcp4", "udp4":
+		return unix.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_BOUND_IF, ifce.Index)
+	case "tcp6", "udp6":
+		return unix.SetsockoptInt(int(fd), syscall.IPPROTO_IPV6, syscall.IPV6_BOUND_IF, ifce.Index)
+	}
+
+	return nil
+}
+
+func setMark(fd uintptr, mark int) error {
+	return nil
+}