Narcoleptic Pasta Manufacturer

    ip-matching
    TypeScript icon, indicating that this package has built-in type declarations

    2.1.2 • Public • Published

    IP-Matching

    GitHub package version NPM NPM downloads Codacy Badge

    GitHub Sponsors Donate

    Standalone module with some handy features regarding IPs:

    • Quick and easy-to-use way to check whether an IP meets a requirement
    • Support for IPv4/IPv6 wildcard addresses, ranges, subnetworks and masks.
    • Supports both parsing and outputting all common IPv6 notations
    • Utility methods, e.g. next/previous IP, range to a list of CIDRs, ...
    • Every release is thoroughly tested and linted before published

    Installation

    npm install --save ip-matching
    # or
    yarn add ip-matching

    Comes with its own built-in TypeScript declarations with included documentation.

    Example

    import { getMatch, IPMatch, IPSubnetwork, IPRange, matches } from 'ip-matching';
    
    // matches(ip: string | IP, target: string | IPMatch): boolean;
    
    matches('10.0.0.1', '10.0.0.0/24'); // true
    matches('10.0.1.1', '10.0.0.0/24'); // false
    matches('abc::def', 'abc:*::def'); // true
    matches('abc::def', 'abc:9::def'); // false
    matches('0001:2:3:4:5:6:7', '1:2:3:4:5:6:7'); // true
    
    // getMatch returns an instance of
    // IPv4, IPv6, IPRange, IPSubnetwork or IPMask, all extending IPMatch
    const mySubnet: IPMatch = getMatch('fefe::0001:abcd/112');
    mySubnet.type; // 'IPSubnetwork'
    mySubnet instanceof IPSubnetwork; // true
    mySubnet instanceof IPMatch; // true
    mySubnet.toString(); // 'fefe::1:0/112'
    mySubnet.matches('FEFE::1:bbbb'); // true
    mySubnet.matches('FEFE::2:bbbb'); // false
    mySubnet.equals(new IPSubnetwork(new IPv6('fefe::1:abcd'), 112)); // true
    mySubnet.getAmount(); // 65536
    (mySubnet as IPSubnetwork).getLast().toString(); // 'fefe::1:ffff'
    
    const myIp = new IPv6('a:0:0::B:0:C');
    myIp.toString(); // 'a::b:0:c'
    myIp.toLongString(); // 'a:0:0:0:0:b:0:c'
    myIp.toFullString(); // '000a:0000:0000:0000:0000:000b:0000:000c'
    new IPv6('::ffff:a9db:*').toMixedString(); // '::ffff:169.219.*.*'
    
    const myRange = getMatch('10.0.0.0-10.1.2.3') as IPRange;
    myRange.convertToMasks().map((mask: IPMask) => mask.convertToSubnet().toString());
    // [ '10.0.0.0/16', '10.1.0.0/23', '10.1.2.0/30' ]
    
    const mask1 = getMatch('10.0.1.0/255.0.255.0') as IPMask;
    const mask2 = getMatch('10.0.0.0/128.0.0.0') as IPMask;
    mask1.isSubsetOf(mask2); // true
    mask2.getAmount(); // 2147483648
    
    getMatch('a::abbc:1234/ffff::ff80:000f').toString(); // 'a::ab80:4/ffff::ff80:f'

    Note: The matches function and all constructors error for invalid inputs

    You can take a look at the test code or the TypeScript declarations for all the features.

    Allowed patterns

    • IP (IPv4/IPv6)
      • Regular IPv4: 10.0.0.0
      • Wildcard IPv4: 10.0.0.* or even 10.*.0.*
      • Regular IPv6: 2001:0db8:85a3:0000:0000:8a2e:0370:7334
      • Shortened IPv6: 2001:db8:85a3::8a2e:0370:7334 or :: or ::1 or a::
      • Wildcard IPv6: 2001::* or even 2001::*:abc:*
      • Mixed IPv6 (mapped IPv4): ::ffff:127.0.0.1 (no wildcards allowed in IPv4 part)
      • Not allowed: 10.0.1*.0 or 2001::a*c
    • IP Range
      • IPv4: 10.0.0.0-10.1.2.3
      • IPv6: 2001::abc-2001::1:ffff
      • Note: Left side has to be "lower" than the right side
    • IP Subnetwork
      • IPv4: 10.0.0.0/16
      • IPv6: 2001::/123
    • IP Mask
      • IPv4: 10.0.0.0/255.0.64.0
      • IPv6: 2001:abcd::/ffff:ff8::

    The IPMask's toString() method does not automatically simplify e.g. /255.0.0.0 to /8, even though those are equivalent. Since 2.0.0, IPMask comes with a method convertToSubnet() which returns an equivalent IPSubnetwork if possible, otherwise undefined.

    Links

    Install

    npm i ip-matching

    DownloadsWeekly Downloads

    662

    Version

    2.1.2

    License

    LGPL-3.0-only

    Unpacked Size

    270 kB

    Total Files

    49

    Last publish

    Collaborators

    • kelvinschoofs