You should definitely communicate with the principal and file a complaint against the person who is sexually harassing your son. In these cases, you shouldn’t directly go to the police. Before filing an FIR, you should talk with the school’s authorities. Also, you should try to find out more about this matter and if there are any boys who have faced the same as your son. And if you still feel the need to file an FIR then you won’t be able to because unfortunately, there is no law in India for males to file a case against sexual harassment.