997 lines
33 KiB
JavaScript
997 lines
33 KiB
JavaScript
(function (root) {
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'use strict';
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// A list of regular expressions that match arbitrary IPv4 addresses,
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// for which a number of weird notations exist.
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// Note that an address like 0010.0xa5.1.1 is considered legal.
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const ipv4Part = '(0?\\d+|0x[a-f0-9]+)';
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const ipv4Regexes = {
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fourOctet: new RegExp(`^${ipv4Part}\\.${ipv4Part}\\.${ipv4Part}\\.${ipv4Part}$`, 'i'),
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threeOctet: new RegExp(`^${ipv4Part}\\.${ipv4Part}\\.${ipv4Part}$`, 'i'),
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twoOctet: new RegExp(`^${ipv4Part}\\.${ipv4Part}$`, 'i'),
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longValue: new RegExp(`^${ipv4Part}$`, 'i')
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};
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// Regular Expression for checking Octal numbers
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const octalRegex = new RegExp(`^0[0-7]+$`, 'i');
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const hexRegex = new RegExp(`^0x[a-f0-9]+$`, 'i');
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const zoneIndex = '%[0-9a-z]{1,}';
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// IPv6-matching regular expressions.
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// For IPv6, the task is simpler: it is enough to match the colon-delimited
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// hexadecimal IPv6 and a transitional variant with dotted-decimal IPv4 at
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// the end.
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const ipv6Part = '(?:[0-9a-f]+::?)+';
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const ipv6Regexes = {
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zoneIndex: new RegExp(zoneIndex, 'i'),
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'native': new RegExp(`^(::)?(${ipv6Part})?([0-9a-f]+)?(::)?(${zoneIndex})?$`, 'i'),
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deprecatedTransitional: new RegExp(`^(?:::)(${ipv4Part}\\.${ipv4Part}\\.${ipv4Part}\\.${ipv4Part}(${zoneIndex})?)$`, 'i'),
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transitional: new RegExp(`^((?:${ipv6Part})|(?:::)(?:${ipv6Part})?)${ipv4Part}\\.${ipv4Part}\\.${ipv4Part}\\.${ipv4Part}(${zoneIndex})?$`, 'i')
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};
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// Expand :: in an IPv6 address or address part consisting of `parts` groups.
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function expandIPv6 (string, parts) {
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// More than one '::' means invalid adddress
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if (string.indexOf('::') !== string.lastIndexOf('::')) {
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return null;
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}
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let colonCount = 0;
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let lastColon = -1;
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let zoneId = (string.match(ipv6Regexes.zoneIndex) || [])[0];
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let replacement, replacementCount;
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// Remove zone index and save it for later
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if (zoneId) {
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zoneId = zoneId.substring(1);
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string = string.replace(/%.+$/, '');
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}
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// How many parts do we already have?
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while ((lastColon = string.indexOf(':', lastColon + 1)) >= 0) {
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colonCount++;
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}
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// 0::0 is two parts more than ::
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if (string.substr(0, 2) === '::') {
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colonCount--;
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}
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if (string.substr(-2, 2) === '::') {
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colonCount--;
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}
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// The following loop would hang if colonCount > parts
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if (colonCount > parts) {
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return null;
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}
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// replacement = ':' + '0:' * (parts - colonCount)
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replacementCount = parts - colonCount;
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replacement = ':';
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while (replacementCount--) {
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replacement += '0:';
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}
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// Insert the missing zeroes
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string = string.replace('::', replacement);
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// Trim any garbage which may be hanging around if :: was at the edge in
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// the source strin
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if (string[0] === ':') {
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string = string.slice(1);
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}
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if (string[string.length - 1] === ':') {
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string = string.slice(0, -1);
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}
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parts = (function () {
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const ref = string.split(':');
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const results = [];
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for (let i = 0; i < ref.length; i++) {
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results.push(parseInt(ref[i], 16));
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}
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return results;
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})();
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return {
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parts: parts,
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zoneId: zoneId
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};
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}
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// A generic CIDR (Classless Inter-Domain Routing) RFC1518 range matcher.
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function matchCIDR (first, second, partSize, cidrBits) {
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if (first.length !== second.length) {
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throw new Error('ipaddr: cannot match CIDR for objects with different lengths');
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}
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let part = 0;
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let shift;
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while (cidrBits > 0) {
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shift = partSize - cidrBits;
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if (shift < 0) {
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shift = 0;
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}
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if (first[part] >> shift !== second[part] >> shift) {
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return false;
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}
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cidrBits -= partSize;
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part += 1;
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}
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return true;
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}
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function parseIntAuto (string) {
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// Hexadedimal base 16 (0x#)
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if (hexRegex.test(string)) {
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return parseInt(string, 16);
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}
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// While octal representation is discouraged by ECMAScript 3
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// and forbidden by ECMAScript 5, we silently allow it to
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// work only if the rest of the string has numbers less than 8.
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if (string[0] === '0' && !isNaN(parseInt(string[1], 10))) {
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if (octalRegex.test(string)) {
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return parseInt(string, 8);
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}
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throw new Error(`ipaddr: cannot parse ${string} as octal`);
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}
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// Always include the base 10 radix!
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return parseInt(string, 10);
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}
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function padPart (part, length) {
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while (part.length < length) {
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part = `0${part}`;
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}
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return part;
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}
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const ipaddr = {};
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// An IPv4 address (RFC791).
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ipaddr.IPv4 = (function () {
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// Constructs a new IPv4 address from an array of four octets
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// in network order (MSB first)
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// Verifies the input.
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function IPv4 (octets) {
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if (octets.length !== 4) {
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throw new Error('ipaddr: ipv4 octet count should be 4');
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}
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let i, octet;
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for (i = 0; i < octets.length; i++) {
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octet = octets[i];
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if (!((0 <= octet && octet <= 255))) {
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throw new Error('ipaddr: ipv4 octet should fit in 8 bits');
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}
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}
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this.octets = octets;
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}
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// Special IPv4 address ranges.
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// See also https://en.wikipedia.org/wiki/Reserved_IP_addresses
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IPv4.prototype.SpecialRanges = {
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unspecified: [[new IPv4([0, 0, 0, 0]), 8]],
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broadcast: [[new IPv4([255, 255, 255, 255]), 32]],
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// RFC3171
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multicast: [[new IPv4([224, 0, 0, 0]), 4]],
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// RFC3927
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linkLocal: [[new IPv4([169, 254, 0, 0]), 16]],
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// RFC5735
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loopback: [[new IPv4([127, 0, 0, 0]), 8]],
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// RFC6598
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carrierGradeNat: [[new IPv4([100, 64, 0, 0]), 10]],
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// RFC1918
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'private': [
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[new IPv4([10, 0, 0, 0]), 8],
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[new IPv4([172, 16, 0, 0]), 12],
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[new IPv4([192, 168, 0, 0]), 16]
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],
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// Reserved and testing-only ranges; RFCs 5735, 5737, 2544, 1700
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reserved: [
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[new IPv4([192, 0, 0, 0]), 24],
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[new IPv4([192, 0, 2, 0]), 24],
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[new IPv4([192, 88, 99, 0]), 24],
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[new IPv4([198, 51, 100, 0]), 24],
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[new IPv4([203, 0, 113, 0]), 24],
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[new IPv4([240, 0, 0, 0]), 4]
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]
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};
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// The 'kind' method exists on both IPv4 and IPv6 classes.
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IPv4.prototype.kind = function () {
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return 'ipv4';
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};
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// Checks if this address matches other one within given CIDR range.
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IPv4.prototype.match = function (other, cidrRange) {
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let ref;
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if (cidrRange === undefined) {
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ref = other;
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other = ref[0];
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cidrRange = ref[1];
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}
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if (other.kind() !== 'ipv4') {
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throw new Error('ipaddr: cannot match ipv4 address with non-ipv4 one');
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}
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return matchCIDR(this.octets, other.octets, 8, cidrRange);
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};
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// returns a number of leading ones in IPv4 address, making sure that
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// the rest is a solid sequence of 0's (valid netmask)
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// returns either the CIDR length or null if mask is not valid
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IPv4.prototype.prefixLengthFromSubnetMask = function () {
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let cidr = 0;
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// non-zero encountered stop scanning for zeroes
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let stop = false;
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// number of zeroes in octet
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const zerotable = {
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0: 8,
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128: 7,
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192: 6,
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224: 5,
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240: 4,
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248: 3,
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252: 2,
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254: 1,
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255: 0
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};
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let i, octet, zeros;
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for (i = 3; i >= 0; i -= 1) {
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octet = this.octets[i];
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if (octet in zerotable) {
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zeros = zerotable[octet];
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if (stop && zeros !== 0) {
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return null;
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}
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if (zeros !== 8) {
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stop = true;
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}
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cidr += zeros;
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} else {
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return null;
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}
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}
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return 32 - cidr;
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};
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// Checks if the address corresponds to one of the special ranges.
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IPv4.prototype.range = function () {
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return ipaddr.subnetMatch(this, this.SpecialRanges);
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};
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// Returns an array of byte-sized values in network order (MSB first)
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IPv4.prototype.toByteArray = function () {
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return this.octets.slice(0);
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};
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// Converts this IPv4 address to an IPv4-mapped IPv6 address.
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IPv4.prototype.toIPv4MappedAddress = function () {
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return ipaddr.IPv6.parse(`::ffff:${this.toString()}`);
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};
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// Symmetrical method strictly for aligning with the IPv6 methods.
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IPv4.prototype.toNormalizedString = function () {
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return this.toString();
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};
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// Returns the address in convenient, decimal-dotted format.
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IPv4.prototype.toString = function () {
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return this.octets.join('.');
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};
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return IPv4;
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})();
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// A utility function to return broadcast address given the IPv4 interface and prefix length in CIDR notation
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ipaddr.IPv4.broadcastAddressFromCIDR = function (string) {
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try {
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const cidr = this.parseCIDR(string);
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const ipInterfaceOctets = cidr[0].toByteArray();
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const subnetMaskOctets = this.subnetMaskFromPrefixLength(cidr[1]).toByteArray();
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const octets = [];
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let i = 0;
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while (i < 4) {
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// Broadcast address is bitwise OR between ip interface and inverted mask
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octets.push(parseInt(ipInterfaceOctets[i], 10) | parseInt(subnetMaskOctets[i], 10) ^ 255);
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i++;
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}
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return new this(octets);
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} catch (e) {
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throw new Error('ipaddr: the address does not have IPv4 CIDR format');
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}
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};
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// Checks if a given string is formatted like IPv4 address.
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ipaddr.IPv4.isIPv4 = function (string) {
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return this.parser(string) !== null;
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};
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// Checks if a given string is a valid IPv4 address.
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ipaddr.IPv4.isValid = function (string) {
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try {
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new this(this.parser(string));
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return true;
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} catch (e) {
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return false;
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}
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};
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// Checks if a given string is a full four-part IPv4 Address.
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ipaddr.IPv4.isValidFourPartDecimal = function (string) {
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if (ipaddr.IPv4.isValid(string) && string.match(/^(0|[1-9]\d*)(\.(0|[1-9]\d*)){3}$/)) {
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return true;
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} else {
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return false;
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}
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};
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// A utility function to return network address given the IPv4 interface and prefix length in CIDR notation
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ipaddr.IPv4.networkAddressFromCIDR = function (string) {
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let cidr, i, ipInterfaceOctets, octets, subnetMaskOctets;
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try {
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cidr = this.parseCIDR(string);
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ipInterfaceOctets = cidr[0].toByteArray();
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subnetMaskOctets = this.subnetMaskFromPrefixLength(cidr[1]).toByteArray();
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octets = [];
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i = 0;
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while (i < 4) {
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// Network address is bitwise AND between ip interface and mask
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octets.push(parseInt(ipInterfaceOctets[i], 10) & parseInt(subnetMaskOctets[i], 10));
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i++;
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}
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return new this(octets);
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} catch (e) {
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throw new Error('ipaddr: the address does not have IPv4 CIDR format');
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}
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};
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// Tries to parse and validate a string with IPv4 address.
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// Throws an error if it fails.
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ipaddr.IPv4.parse = function (string) {
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const parts = this.parser(string);
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if (parts === null) {
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throw new Error('ipaddr: string is not formatted like an IPv4 Address');
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}
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return new this(parts);
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};
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// Parses the string as an IPv4 Address with CIDR Notation.
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ipaddr.IPv4.parseCIDR = function (string) {
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let match;
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if ((match = string.match(/^(.+)\/(\d+)$/))) {
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const maskLength = parseInt(match[2]);
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if (maskLength >= 0 && maskLength <= 32) {
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const parsed = [this.parse(match[1]), maskLength];
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Object.defineProperty(parsed, 'toString', {
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value: function () {
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return this.join('/');
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}
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});
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return parsed;
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}
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}
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throw new Error('ipaddr: string is not formatted like an IPv4 CIDR range');
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};
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// Classful variants (like a.b, where a is an octet, and b is a 24-bit
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// value representing last three octets; this corresponds to a class C
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// address) are omitted due to classless nature of modern Internet.
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ipaddr.IPv4.parser = function (string) {
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let match, part, value;
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// parseInt recognizes all that octal & hexadecimal weirdness for us
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if ((match = string.match(ipv4Regexes.fourOctet))) {
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return (function () {
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const ref = match.slice(1, 6);
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const results = [];
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for (let i = 0; i < ref.length; i++) {
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part = ref[i];
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results.push(parseIntAuto(part));
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}
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return results;
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})();
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} else if ((match = string.match(ipv4Regexes.longValue))) {
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value = parseIntAuto(match[1]);
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if (value > 0xffffffff || value < 0) {
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throw new Error('ipaddr: address outside defined range');
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}
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return ((function () {
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const results = [];
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let shift;
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for (shift = 0; shift <= 24; shift += 8) {
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results.push((value >> shift) & 0xff);
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}
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return results;
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})()).reverse();
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} else if ((match = string.match(ipv4Regexes.twoOctet))) {
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return (function () {
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const ref = match.slice(1, 4);
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const results = [];
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value = parseIntAuto(ref[1]);
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if (value > 0xffffff || value < 0) {
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throw new Error('ipaddr: address outside defined range');
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}
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results.push(parseIntAuto(ref[0]));
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results.push((value >> 16) & 0xff);
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results.push((value >> 8) & 0xff);
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results.push( value & 0xff);
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return results;
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})();
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} else if ((match = string.match(ipv4Regexes.threeOctet))) {
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return (function () {
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const ref = match.slice(1, 5);
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const results = [];
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value = parseIntAuto(ref[2]);
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if (value > 0xffff || value < 0) {
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throw new Error('ipaddr: address outside defined range');
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}
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results.push(parseIntAuto(ref[0]));
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results.push(parseIntAuto(ref[1]));
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results.push((value >> 8) & 0xff);
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results.push( value & 0xff);
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return results;
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})();
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} else {
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return null;
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}
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};
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// A utility function to return subnet mask in IPv4 format given the prefix length
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ipaddr.IPv4.subnetMaskFromPrefixLength = function (prefix) {
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prefix = parseInt(prefix);
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if (prefix < 0 || prefix > 32) {
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throw new Error('ipaddr: invalid IPv4 prefix length');
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}
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const octets = [0, 0, 0, 0];
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let j = 0;
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const filledOctetCount = Math.floor(prefix / 8);
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while (j < filledOctetCount) {
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octets[j] = 255;
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j++;
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}
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if (filledOctetCount < 4) {
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octets[filledOctetCount] = Math.pow(2, prefix % 8) - 1 << 8 - (prefix % 8);
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}
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return new this(octets);
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};
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// An IPv6 address (RFC2460)
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ipaddr.IPv6 = (function () {
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// Constructs an IPv6 address from an array of eight 16 - bit parts
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// or sixteen 8 - bit parts in network order(MSB first).
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// Throws an error if the input is invalid.
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function IPv6 (parts, zoneId) {
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let i, part;
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if (parts.length === 16) {
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this.parts = [];
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for (i = 0; i <= 14; i += 2) {
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this.parts.push((parts[i] << 8) | parts[i + 1]);
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}
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} else if (parts.length === 8) {
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this.parts = parts;
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} else {
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throw new Error('ipaddr: ipv6 part count should be 8 or 16');
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}
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for (i = 0; i < this.parts.length; i++) {
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part = this.parts[i];
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if (!((0 <= part && part <= 0xffff))) {
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throw new Error('ipaddr: ipv6 part should fit in 16 bits');
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|
}
|
|
}
|
|
|
|
if (zoneId) {
|
|
this.zoneId = zoneId;
|
|
}
|
|
}
|
|
|
|
// Special IPv6 ranges
|
|
IPv6.prototype.SpecialRanges = {
|
|
// RFC4291, here and after
|
|
unspecified: [new IPv6([0, 0, 0, 0, 0, 0, 0, 0]), 128],
|
|
linkLocal: [new IPv6([0xfe80, 0, 0, 0, 0, 0, 0, 0]), 10],
|
|
multicast: [new IPv6([0xff00, 0, 0, 0, 0, 0, 0, 0]), 8],
|
|
loopback: [new IPv6([0, 0, 0, 0, 0, 0, 0, 1]), 128],
|
|
uniqueLocal: [new IPv6([0xfc00, 0, 0, 0, 0, 0, 0, 0]), 7],
|
|
ipv4Mapped: [new IPv6([0, 0, 0, 0, 0, 0xffff, 0, 0]), 96],
|
|
// RFC6145
|
|
rfc6145: [new IPv6([0, 0, 0, 0, 0xffff, 0, 0, 0]), 96],
|
|
// RFC6052
|
|
rfc6052: [new IPv6([0x64, 0xff9b, 0, 0, 0, 0, 0, 0]), 96],
|
|
// RFC3056
|
|
'6to4': [new IPv6([0x2002, 0, 0, 0, 0, 0, 0, 0]), 16],
|
|
// RFC6052, RFC6146
|
|
teredo: [new IPv6([0x2001, 0, 0, 0, 0, 0, 0, 0]), 32],
|
|
// RFC4291
|
|
reserved: [[new IPv6([0x2001, 0xdb8, 0, 0, 0, 0, 0, 0]), 32]]
|
|
};
|
|
|
|
// Checks if this address is an IPv4-mapped IPv6 address.
|
|
IPv6.prototype.isIPv4MappedAddress = function () {
|
|
return this.range() === 'ipv4Mapped';
|
|
};
|
|
|
|
// The 'kind' method exists on both IPv4 and IPv6 classes.
|
|
IPv6.prototype.kind = function () {
|
|
return 'ipv6';
|
|
};
|
|
|
|
// Checks if this address matches other one within given CIDR range.
|
|
IPv6.prototype.match = function (other, cidrRange) {
|
|
let ref;
|
|
|
|
if (cidrRange === undefined) {
|
|
ref = other;
|
|
other = ref[0];
|
|
cidrRange = ref[1];
|
|
}
|
|
|
|
if (other.kind() !== 'ipv6') {
|
|
throw new Error('ipaddr: cannot match ipv6 address with non-ipv6 one');
|
|
}
|
|
|
|
return matchCIDR(this.parts, other.parts, 16, cidrRange);
|
|
};
|
|
|
|
// returns a number of leading ones in IPv6 address, making sure that
|
|
// the rest is a solid sequence of 0's (valid netmask)
|
|
// returns either the CIDR length or null if mask is not valid
|
|
IPv6.prototype.prefixLengthFromSubnetMask = function () {
|
|
let cidr = 0;
|
|
// non-zero encountered stop scanning for zeroes
|
|
let stop = false;
|
|
// number of zeroes in octet
|
|
const zerotable = {
|
|
0: 16,
|
|
32768: 15,
|
|
49152: 14,
|
|
57344: 13,
|
|
61440: 12,
|
|
63488: 11,
|
|
64512: 10,
|
|
65024: 9,
|
|
65280: 8,
|
|
65408: 7,
|
|
65472: 6,
|
|
65504: 5,
|
|
65520: 4,
|
|
65528: 3,
|
|
65532: 2,
|
|
65534: 1,
|
|
65535: 0
|
|
};
|
|
let part, zeros;
|
|
|
|
for (let i = 7; i >= 0; i -= 1) {
|
|
part = this.parts[i];
|
|
if (part in zerotable) {
|
|
zeros = zerotable[part];
|
|
if (stop && zeros !== 0) {
|
|
return null;
|
|
}
|
|
|
|
if (zeros !== 16) {
|
|
stop = true;
|
|
}
|
|
|
|
cidr += zeros;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
return 128 - cidr;
|
|
};
|
|
|
|
|
|
// Checks if the address corresponds to one of the special ranges.
|
|
IPv6.prototype.range = function () {
|
|
return ipaddr.subnetMatch(this, this.SpecialRanges);
|
|
};
|
|
|
|
// Returns an array of byte-sized values in network order (MSB first)
|
|
IPv6.prototype.toByteArray = function () {
|
|
let part;
|
|
const bytes = [];
|
|
const ref = this.parts;
|
|
for (let i = 0; i < ref.length; i++) {
|
|
part = ref[i];
|
|
bytes.push(part >> 8);
|
|
bytes.push(part & 0xff);
|
|
}
|
|
|
|
return bytes;
|
|
};
|
|
|
|
// Returns the address in expanded format with all zeroes included, like
|
|
// 2001:0db8:0008:0066:0000:0000:0000:0001
|
|
IPv6.prototype.toFixedLengthString = function () {
|
|
const addr = ((function () {
|
|
const results = [];
|
|
for (let i = 0; i < this.parts.length; i++) {
|
|
results.push(padPart(this.parts[i].toString(16), 4));
|
|
}
|
|
|
|
return results;
|
|
}).call(this)).join(':');
|
|
|
|
let suffix = '';
|
|
|
|
if (this.zoneId) {
|
|
suffix = `%${this.zoneId}`;
|
|
}
|
|
|
|
return addr + suffix;
|
|
};
|
|
|
|
// Converts this address to IPv4 address if it is an IPv4-mapped IPv6 address.
|
|
// Throws an error otherwise.
|
|
IPv6.prototype.toIPv4Address = function () {
|
|
if (!this.isIPv4MappedAddress()) {
|
|
throw new Error('ipaddr: trying to convert a generic ipv6 address to ipv4');
|
|
}
|
|
|
|
const ref = this.parts.slice(-2);
|
|
const high = ref[0];
|
|
const low = ref[1];
|
|
|
|
return new ipaddr.IPv4([high >> 8, high & 0xff, low >> 8, low & 0xff]);
|
|
};
|
|
|
|
// Returns the address in expanded format with all zeroes included, like
|
|
// 2001:db8:8:66:0:0:0:1
|
|
//
|
|
// Deprecated: use toFixedLengthString() instead.
|
|
IPv6.prototype.toNormalizedString = function () {
|
|
const addr = ((function () {
|
|
const results = [];
|
|
|
|
for (let i = 0; i < this.parts.length; i++) {
|
|
results.push(this.parts[i].toString(16));
|
|
}
|
|
|
|
return results;
|
|
}).call(this)).join(':');
|
|
|
|
let suffix = '';
|
|
|
|
if (this.zoneId) {
|
|
suffix = `%${this.zoneId}`;
|
|
}
|
|
|
|
return addr + suffix;
|
|
};
|
|
|
|
// Returns the address in compact, human-readable format like
|
|
// 2001:db8:8:66::1
|
|
// in line with RFC 5952 (see https://tools.ietf.org/html/rfc5952#section-4)
|
|
IPv6.prototype.toRFC5952String = function () {
|
|
const regex = /((^|:)(0(:|$)){2,})/g;
|
|
const string = this.toNormalizedString();
|
|
let bestMatchIndex = 0;
|
|
let bestMatchLength = -1;
|
|
let match;
|
|
|
|
while ((match = regex.exec(string))) {
|
|
if (match[0].length > bestMatchLength) {
|
|
bestMatchIndex = match.index;
|
|
bestMatchLength = match[0].length;
|
|
}
|
|
}
|
|
|
|
if (bestMatchLength < 0) {
|
|
return string;
|
|
}
|
|
|
|
return `${string.substring(0, bestMatchIndex)}::${string.substring(bestMatchIndex + bestMatchLength)}`;
|
|
};
|
|
|
|
// Returns the address in compact, human-readable format like
|
|
// 2001:db8:8:66::1
|
|
//
|
|
// Deprecated: use toRFC5952String() instead.
|
|
IPv6.prototype.toString = function () {
|
|
// Replace the first sequence of 1 or more '0' parts with '::'
|
|
return this.toNormalizedString().replace(/((^|:)(0(:|$))+)/, '::');
|
|
};
|
|
|
|
return IPv6;
|
|
|
|
})();
|
|
|
|
// A utility function to return broadcast address given the IPv6 interface and prefix length in CIDR notation
|
|
ipaddr.IPv6.broadcastAddressFromCIDR = function (string) {
|
|
try {
|
|
const cidr = this.parseCIDR(string);
|
|
const ipInterfaceOctets = cidr[0].toByteArray();
|
|
const subnetMaskOctets = this.subnetMaskFromPrefixLength(cidr[1]).toByteArray();
|
|
const octets = [];
|
|
let i = 0;
|
|
while (i < 16) {
|
|
// Broadcast address is bitwise OR between ip interface and inverted mask
|
|
octets.push(parseInt(ipInterfaceOctets[i], 10) | parseInt(subnetMaskOctets[i], 10) ^ 255);
|
|
i++;
|
|
}
|
|
|
|
return new this(octets);
|
|
} catch (e) {
|
|
throw new Error(`ipaddr: the address does not have IPv6 CIDR format (${e})`);
|
|
}
|
|
};
|
|
|
|
// Checks if a given string is formatted like IPv6 address.
|
|
ipaddr.IPv6.isIPv6 = function (string) {
|
|
return this.parser(string) !== null;
|
|
};
|
|
|
|
// Checks to see if string is a valid IPv6 Address
|
|
ipaddr.IPv6.isValid = function (string) {
|
|
|
|
// Since IPv6.isValid is always called first, this shortcut
|
|
// provides a substantial performance gain.
|
|
if (typeof string === 'string' && string.indexOf(':') === -1) {
|
|
return false;
|
|
}
|
|
|
|
try {
|
|
const addr = this.parser(string);
|
|
new this(addr.parts, addr.zoneId);
|
|
return true;
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
};
|
|
|
|
// A utility function to return network address given the IPv6 interface and prefix length in CIDR notation
|
|
ipaddr.IPv6.networkAddressFromCIDR = function (string) {
|
|
let cidr, i, ipInterfaceOctets, octets, subnetMaskOctets;
|
|
|
|
try {
|
|
cidr = this.parseCIDR(string);
|
|
ipInterfaceOctets = cidr[0].toByteArray();
|
|
subnetMaskOctets = this.subnetMaskFromPrefixLength(cidr[1]).toByteArray();
|
|
octets = [];
|
|
i = 0;
|
|
while (i < 16) {
|
|
// Network address is bitwise AND between ip interface and mask
|
|
octets.push(parseInt(ipInterfaceOctets[i], 10) & parseInt(subnetMaskOctets[i], 10));
|
|
i++;
|
|
}
|
|
|
|
return new this(octets);
|
|
} catch (e) {
|
|
throw new Error(`ipaddr: the address does not have IPv6 CIDR format (${e})`);
|
|
}
|
|
};
|
|
|
|
// Tries to parse and validate a string with IPv6 address.
|
|
// Throws an error if it fails.
|
|
ipaddr.IPv6.parse = function (string) {
|
|
const addr = this.parser(string);
|
|
|
|
if (addr.parts === null) {
|
|
throw new Error('ipaddr: string is not formatted like an IPv6 Address');
|
|
}
|
|
|
|
return new this(addr.parts, addr.zoneId);
|
|
};
|
|
|
|
ipaddr.IPv6.parseCIDR = function (string) {
|
|
let maskLength, match, parsed;
|
|
|
|
if ((match = string.match(/^(.+)\/(\d+)$/))) {
|
|
maskLength = parseInt(match[2]);
|
|
if (maskLength >= 0 && maskLength <= 128) {
|
|
parsed = [this.parse(match[1]), maskLength];
|
|
Object.defineProperty(parsed, 'toString', {
|
|
value: function () {
|
|
return this.join('/');
|
|
}
|
|
});
|
|
return parsed;
|
|
}
|
|
}
|
|
|
|
throw new Error('ipaddr: string is not formatted like an IPv6 CIDR range');
|
|
};
|
|
|
|
// Parse an IPv6 address.
|
|
ipaddr.IPv6.parser = function (string) {
|
|
let addr, i, match, octet, octets, zoneId;
|
|
|
|
if ((match = string.match(ipv6Regexes.deprecatedTransitional))) {
|
|
return this.parser(`::ffff:${match[1]}`);
|
|
}
|
|
if (ipv6Regexes.native.test(string)) {
|
|
return expandIPv6(string, 8);
|
|
}
|
|
if ((match = string.match(ipv6Regexes.transitional))) {
|
|
zoneId = match[6] || '';
|
|
addr = expandIPv6(match[1].slice(0, -1) + zoneId, 6);
|
|
if (addr.parts) {
|
|
octets = [
|
|
parseInt(match[2]),
|
|
parseInt(match[3]),
|
|
parseInt(match[4]),
|
|
parseInt(match[5])
|
|
];
|
|
for (i = 0; i < octets.length; i++) {
|
|
octet = octets[i];
|
|
if (!((0 <= octet && octet <= 255))) {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
addr.parts.push(octets[0] << 8 | octets[1]);
|
|
addr.parts.push(octets[2] << 8 | octets[3]);
|
|
return {
|
|
parts: addr.parts,
|
|
zoneId: addr.zoneId
|
|
};
|
|
}
|
|
}
|
|
|
|
return null;
|
|
};
|
|
|
|
// A utility function to return subnet mask in IPv6 format given the prefix length
|
|
ipaddr.IPv6.subnetMaskFromPrefixLength = function (prefix) {
|
|
prefix = parseInt(prefix);
|
|
if (prefix < 0 || prefix > 128) {
|
|
throw new Error('ipaddr: invalid IPv6 prefix length');
|
|
}
|
|
|
|
const octets = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
|
|
let j = 0;
|
|
const filledOctetCount = Math.floor(prefix / 8);
|
|
|
|
while (j < filledOctetCount) {
|
|
octets[j] = 255;
|
|
j++;
|
|
}
|
|
|
|
if (filledOctetCount < 16) {
|
|
octets[filledOctetCount] = Math.pow(2, prefix % 8) - 1 << 8 - (prefix % 8);
|
|
}
|
|
|
|
return new this(octets);
|
|
};
|
|
|
|
// Try to parse an array in network order (MSB first) for IPv4 and IPv6
|
|
ipaddr.fromByteArray = function (bytes) {
|
|
const length = bytes.length;
|
|
|
|
if (length === 4) {
|
|
return new ipaddr.IPv4(bytes);
|
|
} else if (length === 16) {
|
|
return new ipaddr.IPv6(bytes);
|
|
} else {
|
|
throw new Error('ipaddr: the binary input is neither an IPv6 nor IPv4 address');
|
|
}
|
|
};
|
|
|
|
// Checks if the address is valid IP address
|
|
ipaddr.isValid = function (string) {
|
|
return ipaddr.IPv6.isValid(string) || ipaddr.IPv4.isValid(string);
|
|
};
|
|
|
|
|
|
// Attempts to parse an IP Address, first through IPv6 then IPv4.
|
|
// Throws an error if it could not be parsed.
|
|
ipaddr.parse = function (string) {
|
|
if (ipaddr.IPv6.isValid(string)) {
|
|
return ipaddr.IPv6.parse(string);
|
|
} else if (ipaddr.IPv4.isValid(string)) {
|
|
return ipaddr.IPv4.parse(string);
|
|
} else {
|
|
throw new Error('ipaddr: the address has neither IPv6 nor IPv4 format');
|
|
}
|
|
};
|
|
|
|
// Attempt to parse CIDR notation, first through IPv6 then IPv4.
|
|
// Throws an error if it could not be parsed.
|
|
ipaddr.parseCIDR = function (string) {
|
|
try {
|
|
return ipaddr.IPv6.parseCIDR(string);
|
|
} catch (e) {
|
|
try {
|
|
return ipaddr.IPv4.parseCIDR(string);
|
|
} catch (e2) {
|
|
throw new Error('ipaddr: the address has neither IPv6 nor IPv4 CIDR format');
|
|
}
|
|
}
|
|
};
|
|
|
|
// Parse an address and return plain IPv4 address if it is an IPv4-mapped address
|
|
ipaddr.process = function (string) {
|
|
const addr = this.parse(string);
|
|
|
|
if (addr.kind() === 'ipv6' && addr.isIPv4MappedAddress()) {
|
|
return addr.toIPv4Address();
|
|
} else {
|
|
return addr;
|
|
}
|
|
};
|
|
|
|
// An utility function to ease named range matching. See examples below.
|
|
// rangeList can contain both IPv4 and IPv6 subnet entries and will not throw errors
|
|
// on matching IPv4 addresses to IPv6 ranges or vice versa.
|
|
ipaddr.subnetMatch = function (address, rangeList, defaultName) {
|
|
let i, rangeName, rangeSubnets, subnet;
|
|
|
|
if (defaultName === undefined || defaultName === null) {
|
|
defaultName = 'unicast';
|
|
}
|
|
|
|
for (rangeName in rangeList) {
|
|
if (Object.prototype.hasOwnProperty.call(rangeList, rangeName)) {
|
|
rangeSubnets = rangeList[rangeName];
|
|
// ECMA5 Array.isArray isn't available everywhere
|
|
if (rangeSubnets[0] && !(rangeSubnets[0] instanceof Array)) {
|
|
rangeSubnets = [rangeSubnets];
|
|
}
|
|
|
|
for (i = 0; i < rangeSubnets.length; i++) {
|
|
subnet = rangeSubnets[i];
|
|
if (address.kind() === subnet[0].kind() && address.match.apply(address, subnet)) {
|
|
return rangeName;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return defaultName;
|
|
};
|
|
|
|
// Export for both the CommonJS and browser-like environment
|
|
if (typeof module !== 'undefined' && module.exports) {
|
|
module.exports = ipaddr;
|
|
|
|
} else {
|
|
root.ipaddr = ipaddr;
|
|
}
|
|
|
|
}(this));
|