ipValidate ipv6 ipv4

ipValidate.ts

/**
 * 验证是否为有效的 IPv6 地址
 * from https://github.com/ChrisWarwick/IPv6Regex/blob/master/IPv6Regex.psm1
 * @param ip
 */
function isValidIPv6(ip: string) {
    // IPv6 地址由 1-4 位十六进制数字组成的组构成
    const hex = '[0-9a-fA-F]{1,4}';
    // IPv6 地址可以在最后 4 个字节中嵌入 IPv4 地址
    const octet = '(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])';
    const ipv4 = `(${octet}\\.){3}${octet}`;
    // 前导 0 可以压缩，连续的 0 可以压缩为 "::" ，但是只能出现一次
    // 示例：
    // 标准 IPv6 "2001:0db8:85a3:0000:0000:8a2e:0370:7334"
    // 压缩 IPv6 "2001:db8:85a3::8a2e:370:7334"
    // 嵌入 IPv4 "1:2:3:4:5:6:1.2.3.4"
    // 压缩 "0:0:0:0:0:0:0:1" 为 "::1"
    const ipv6RegexCases = [];
    ipv6RegexCases[0] = `((${hex}:){7}(${hex}|:))`; // g:g:g:g:g:g:g:g  g:g:g:g:g:g:g::
    ipv6RegexCases[1] = `((${hex}:){6}(:${hex}|${ipv4}|:))`; // g:g:g:g:g:g::g  g:g:g:g:g:g:ip4  g:g:g:g:g:g::
    ipv6RegexCases[2] = `((${hex}:){5}(((:${hex}){1,2})|:${ipv4}|:))`; // g:g:g:g:g::g  g:g:g:g:g::g:g  g:g:g:g:g::ip4  g:g:g:g:g::
    ipv6RegexCases[3] = `((${hex}:){4}(((:${hex}){1,3})|((:${hex})?:${ipv4})|:))`; // g:g:g:g::g ... g:g:g:g::g:g:g  g:g:g:g::ip4  g:g:g:g::g:ip4  g:g:g:g::
    ipv6RegexCases[4] = `((${hex}:){3}(((:${hex}){1,4})|((:${hex}){0,2}:${ipv4})|:))`; // g:g:g::g ... g:g:g::g:g:g:g  g:g:g::ip4 ... g:g:g::g:g:ip4  g:g:g::
    ipv6RegexCases[5] = `((${hex}:){2}(((:${hex}){1,5})|((:${hex}){0,3}:${ipv4})|:))`; // g:g::g ... g:g::g:g:g:g:g  g:g::ip4 ... g:g::g:g:g:ip4  g:g::
    ipv6RegexCases[6] = `((${hex}:){1}(((:${hex}){1,6})|((:${hex}){0,4}:${ipv4})|:))`; // g::g ... g::g:g:g:g:g:g  g::ip4 ... g::g:g:g:g:ip4  g::
    ipv6RegexCases[7] = `(:(((:${hex}){1,7})|((:${hex}){0,5}:${ipv4})|:))`; // ::g ... ::g:g:g:g:g:g:g  ::g:ip4 ... ::g:g:g:g:g:ip4  ::
    const ipv6Regex = new RegExp(`^(${ipv6RegexCases.join('|')})$`, 'i');
    // console.log(ipv6RegexCases);
    return ipv6Regex.test(ip);
}

function isValidIPv4(ip: string) {
    const octet = '(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)'; // 0-255,支持前导零
    const ipv4Regex = new RegExp(`^(${octet}\\.){3}${octet}$`, 'i');
    return ipv4Regex.test(ip);
}

const ipValidate = (ip: string) => {
    if (ip.includes(':')) {
        return isValidIPv6(ip);
    } else {
        return isValidIPv4(ip);
    }
};

export default ipValidate;