l2tp_ctrl_send
int l2tp_ctrl_send(l2tp_ctrl *, const void *, int);
if ((rval = l2tp_ctrl_send(_this->ctrl, bytebuffer_pointer(buffer),
if ((rval = l2tp_ctrl_send(_this, bytebuffer_pointer(bytebuf),
if (l2tp_ctrl_send(_this, bytebuffer_pointer(bytebuf),