package yggdrasil import "os/exec" import "unsafe" //import "syscall" import "golang.org/x/sys/unix" import water "github.com/yggdrasil-network/water" type in6_addrlifetime struct { ia6t_expire float64 ia6t_preferred float64 ia6t_vltime uint32 ia6t_pltime uint32 } type sockaddr_in6 struct { sin6_len uint8 sin6_family uint8 sin6_port uint8 sin6_flowinfo uint32 sin6_addr [8]uint16 sin6_scope_id uint32 } type in6_aliasreq struct { ifra_name [16]byte ifra_addr sockaddr_in6 ifra_dstaddr sockaddr_in6 ifra_prefixmask sockaddr_in6 ifra_flags uint32 ifra_lifetime in6_addrlifetime } func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error { var config water.Config if ifname[:4] == "auto" { ifname = "/dev/tap0" } if len(ifname) < 9 { panic("TUN/TAP name must be in format /dev/tunX or /dev/tapX") } switch { case iftapmode || ifname[:8] == "/dev/tap": config = water.Config{DeviceType: water.TAP} case !iftapmode || ifname[:8] == "/dev/tun": //config = water.Config{DeviceType: water.TUN} panic("TUN mode is not currently supported on this platform, please use TAP instead") default: panic("TUN/TAP name must be in format /dev/tunX or /dev/tapX") } config.Name = ifname iface, err := water.New(config) if err != nil { panic(err) } tun.iface = iface tun.mtu = getSupportedMTU(mtu) return tun.setupAddress(addr) } func (tun *tunDevice) setupAddress(addr string) error { fd := tun.iface.FD().Fd() var err error var ti tuninfo tun.core.log.Printf("Interface name: %s", tun.iface.Name()) tun.core.log.Printf("Interface IPv6: %s", addr) tun.core.log.Printf("Interface MTU: %d", tun.mtu) // Get the existing interface flags if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(TUNGIFINFO), uintptr(unsafe.Pointer(&ti))); errno != 0 { err = errno tun.core.log.Printf("Error in TUNGIFINFO: %v", errno) return err } // Update with any OS-specific flags, MTU, etc. ti.setInfo(tun) // Set the new interface flags if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(TUNSIFINFO), uintptr(unsafe.Pointer(&ti))); errno != 0 { err = errno tun.core.log.Printf("Error in TUNSIFINFO: %v", errno) return err } // Set address cmd := exec.Command("ifconfig", tun.iface.Name(), "inet6", addr) //tun.core.log.Printf("ifconfig command: %v", strings.Join(cmd.Args, " ")) output, err := cmd.CombinedOutput() if err != nil { tun.core.log.Printf("ifconfig failed: %v.", err) tun.core.log.Println(string(output)) } return nil }