func newTun(ifname, addr, mask string, mtu int) (t tunDev, err error) {
fd := C.tundev_open(C.CString(ifname))
if fd == -1 {
err = errors.New("cannot open tun interface")
} else {
if C.tundev_up(C.CString(ifname), C.CString(addr), C.CString(mask), C.int(mtu)) < C.int(0) {
err = errors.New("cannot put up interface")
} else {
t = tunDev{fd}
}
}
return
}
func newTun(ifname, addr, dstaddr string, mtu int) (t tunDev, err error) {
name := C.tundev_open(&t.fd)
if t.fd == C.int(-1) {
err = errors.New("cannot open tun interface")
} else {
res := C.tundev_up(name, C.CString(addr), C.CString(dstaddr), C.int(mtu))
if res == C.int(-1) {
err = errors.New("cannot put up interface")
t.Close()
}
}
C.tundev_free(name)
return
}