#!/usr/bin/python
# -*- coding:utf-8 -*-

import re
import IPy

def isHost(host: str) -> bool:
    """
    判断host是否合法

    IPv4 / IPv6 / Domain

        合法: return True

        不合法: return False
    """
    try:
        IPy.IP(host)
        if host.find('/') != -1: # filter CIDR
            return False
        return True # IP地址合法
    except:
        pass
    try:
        return re.search( # 域名匹配
            r'^(?=^.{3,255}$)[a-zA-Z0-9_][a-zA-Z0-9_-]{0,62}(\.[a-zA-Z0-9_][a-zA-Z0-9_-]{0,62})+$', host
        ) is not None
    except: # 异常错误
        return False

def isPort(port: int) -> bool:
    """
    判断端口是否合法

    1 ~ 65535

        合法: return True

        不合法: return False
    """
    try:
        if 1 <= port <= 65535: # 1 ~ 65535
            return True
    except: # illegal
        pass
    return False