Skip to content
Permalink
 
 
Cannot retrieve contributors at this time
1002 lines (840 sloc) 33.6 KB
(function (root) {
'use strict';
// A list of regular expressions that match arbitrary IPv4 addresses,
// for which a number of weird notations exist.
// Note that an address like 0010.0xa5.1.1 is considered legal.
const ipv4Part = '(0?\\d+|0x[a-f0-9]+)';
const ipv4Regexes = {
fourOctet: new RegExp(`^${ipv4Part}\\.${ipv4Part}\\.${ipv4Part}\\.${ipv4Part}$`, 'i'),
threeOctet: new RegExp(`^${ipv4Part}\\.${ipv4Part}\\.${ipv4Part}$`, 'i'),
twoOctet: new RegExp(`^${ipv4Part}\\.${ipv4Part}$`, 'i'),
longValue: new RegExp(`^${ipv4Part}$`, 'i')
};
// Regular Expression for checking Octal numbers
const octalRegex = new RegExp(`^0[0-7]+$`, 'i');
const hexRegex = new RegExp(`^0x[a-f0-9]+$`, 'i');
const zoneIndex = '%[0-9a-z]{1,}';
// IPv6-matching regular expressions.
// For IPv6, the task is simpler: it is enough to match the colon-delimited
// hexadecimal IPv6 and a transitional variant with dotted-decimal IPv4 at
// the end.
const ipv6Part = '(?:[0-9a-f]+::?)+';
const ipv6Regexes = {
zoneIndex: new RegExp(zoneIndex, 'i'),
'native': new RegExp(`^(::)?(${ipv6Part})?([0-9a-f]+)?(::)?(${zoneIndex})?$`, 'i'),
deprecatedTransitional: new RegExp(`^(?:::)(${ipv4Part}\\.${ipv4Part}\\.${ipv4Part}\\.${ipv4Part}(${zoneIndex})?)$`, 'i'),
transitional: new RegExp(`^((?:${ipv6Part})|(?:::)(?:${ipv6Part})?)${ipv4Part}\\.${ipv4Part}\\.${ipv4Part}\\.${ipv4Part}(${zoneIndex})?$`, 'i')
};
// Expand :: in an IPv6 address or address part consisting of `parts` groups.
function expandIPv6 (string, parts) {
// More than one '::' means invalid adddress
if (string.indexOf('::') !== string.lastIndexOf('::')) {
return null;
}
let colonCount = 0;
let lastColon = -1;
let zoneId = (string.match(ipv6Regexes.zoneIndex) || [])[0];
let replacement, replacementCount;
// Remove zone index and save it for later
if (zoneId) {
zoneId = zoneId.substring(1);
string = string.replace(/%.+$/, '');
}
// How many parts do we already have?
while ((lastColon = string.indexOf(':', lastColon + 1)) >= 0) {
colonCount++;
}
// 0::0 is two parts more than ::
if (string.substr(0, 2) === '::') {
colonCount--;
}
if (string.substr(-2, 2) === '::') {
colonCount--;
}
// The following loop would hang if colonCount > parts
if (colonCount > parts) {
return null;
}
// replacement = ':' + '0:' * (parts - colonCount)
replacementCount = parts - colonCount;
replacement = ':';
while (replacementCount--) {
replacement += '0:';
}
// Insert the missing zeroes
string = string.replace('::', replacement);
// Trim any garbage which may be hanging around if :: was at the edge in
// the source strin
if (string[0] === ':') {
string = string.slice(1);
}
if (string[string.length - 1] === ':') {
string = string.slice(0, -1);
}
parts = (function () {
const ref = string.split(':');
const results = [];
for (let i = 0; i < ref.length; i++) {
results.push(parseInt(ref[i], 16));
}
return results;
})();
return {
parts: parts,
zoneId: zoneId
};
}
// A generic CIDR (Classless Inter-Domain Routing) RFC1518 range matcher.
function matchCIDR (first, second, partSize, cidrBits) {
if (first.length !== second.length) {
throw new Error('ipaddr: cannot match CIDR for objects with different lengths');
}
let part = 0;
let shift;
while (cidrBits > 0) {
shift = partSize - cidrBits;
if (shift < 0) {
shift = 0;
}
if (first[part] >> shift !== second[part] >> shift) {
return false;
}
cidrBits -= partSize;
part += 1;
}
return true;
}
function parseIntAuto (string) {
// Hexadedimal base 16 (0x#)
if (hexRegex.test(string)) {
return parseInt(string, 16);
}
// While octal representation is discouraged by ECMAScript 3
// and forbidden by ECMAScript 5, we silently allow it to
// work only if the rest of the string has numbers less than 8.
if (string[0] === '0' && !isNaN(parseInt(string[1], 10))) {
if (octalRegex.test(string)) {
return parseInt(string, 8);
}
throw new Error(`ipaddr: cannot parse ${string} as octal`);
}
// Always include the base 10 radix!
return parseInt(string, 10);
}
function padPart (part, length) {
while (part.length < length) {
part = `0${part}`;
}
return part;
}
const ipaddr = {};
// An IPv4 address (RFC791).
ipaddr.IPv4 = (function () {
// Constructs a new IPv4 address from an array of four octets
// in network order (MSB first)
// Verifies the input.
function IPv4 (octets) {
if (octets.length !== 4) {
throw new Error('ipaddr: ipv4 octet count should be 4');
}
let i, octet;
for (i = 0; i < octets.length; i++) {
octet = octets[i];
if (!((0 <= octet && octet <= 255))) {
throw new Error('ipaddr: ipv4 octet should fit in 8 bits');
}
}
this.octets = octets;
}
// Special IPv4 address ranges.
// See also https://en.wikipedia.org/wiki/Reserved_IP_addresses
IPv4.prototype.SpecialRanges = {
unspecified: [[new IPv4([0, 0, 0, 0]), 8]],
broadcast: [[new IPv4([255, 255, 255, 255]), 32]],
// RFC3171
multicast: [[new IPv4([224, 0, 0, 0]), 4]],
// RFC3927
linkLocal: [[new IPv4([169, 254, 0, 0]), 16]],
// RFC5735
loopback: [[new IPv4([127, 0, 0, 0]), 8]],
// RFC6598
carrierGradeNat: [[new IPv4([100, 64, 0, 0]), 10]],
// RFC1918
'private': [
[new IPv4([10, 0, 0, 0]), 8],
[new IPv4([172, 16, 0, 0]), 12],
[new IPv4([192, 168, 0, 0]), 16]
],
// Reserved and testing-only ranges; RFCs 5735, 5737, 2544, 1700
reserved: [
[new IPv4([192, 0, 0, 0]), 24],
[new IPv4([192, 0, 2, 0]), 24],
[new IPv4([192, 88, 99, 0]), 24],
[new IPv4([198, 18, 0, 0]), 15],
[new IPv4([198, 51, 100, 0]), 24],
[new IPv4([203, 0, 113, 0]), 24],
[new IPv4([240, 0, 0, 0]), 4]
]
};
// The 'kind' method exists on both IPv4 and IPv6 classes.
IPv4.prototype.kind = function () {
return 'ipv4';
};
// Checks if this address matches other one within given CIDR range.
IPv4.prototype.match = function (other, cidrRange) {
let ref;
if (cidrRange === undefined) {
ref = other;
other = ref[0];
cidrRange = ref[1];
}
if (other.kind() !== 'ipv4') {
throw new Error('ipaddr: cannot match ipv4 address with non-ipv4 one');
}
return matchCIDR(this.octets, other.octets, 8, cidrRange);
};
// returns a number of leading ones in IPv4 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
IPv4.prototype.prefixLengthFromSubnetMask = function () {
let cidr = 0;
// non-zero encountered stop scanning for zeroes
let stop = false;
// number of zeroes in octet
const zerotable = {
0: 8,
128: 7,
192: 6,
224: 5,
240: 4,
248: 3,
252: 2,
254: 1,
255: 0
};
let i, octet, zeros;
for (i = 3; i >= 0; i -= 1) {
octet = this.octets[i];
if (octet in zerotable) {
zeros = zerotable[octet];
if (stop && zeros !== 0) {
return null;
}
if (zeros !== 8) {
stop = true;
}
cidr += zeros;
} else {
return null;
}
}
return 32 - cidr;
};
// Checks if the address corresponds to one of the special ranges.
IPv4.prototype.range = function () {
return ipaddr.subnetMatch(this, this.SpecialRanges);
};
// Returns an array of byte-sized values in network order (MSB first)
IPv4.prototype.toByteArray = function () {
return this.octets.slice(0);
};
// Converts this IPv4 address to an IPv4-mapped IPv6 address.
IPv4.prototype.toIPv4MappedAddress = function () {
return ipaddr.IPv6.parse(`::ffff:${this.toString()}`);
};
// Symmetrical method strictly for aligning with the IPv6 methods.
IPv4.prototype.toNormalizedString = function () {
return this.toString();
};
// Returns the address in convenient, decimal-dotted format.
IPv4.prototype.toString = function () {
return this.octets.join('.');
};
return IPv4;
})();
// A utility function to return broadcast address given the IPv4 interface and prefix length in CIDR notation
ipaddr.IPv4.broadcastAddressFromCIDR = function (string) {
try {
const cidr = this.parseCIDR(string);
const ipInterfaceOctets = cidr[0].toByteArray();
const subnetMaskOctets = this.subnetMaskFromPrefixLength(cidr[1]).toByteArray();
const octets = [];
let i = 0;
while (i < 4) {
// Broadcast address is bitwise OR between ip interface and inverted mask
octets.push(parseInt(ipInterfaceOctets[i], 10) | parseInt(subnetMaskOctets[i], 10) ^ 255);
i++;
}
return new this(octets);
} catch (e) {
throw new Error('ipaddr: the address does not have IPv4 CIDR format');
}
};
// Checks if a given string is formatted like IPv4 address.
ipaddr.IPv4.isIPv4 = function (string) {
return this.parser(string) !== null;
};
// Checks if a given string is a valid IPv4 address.
ipaddr.IPv4.isValid = function (string) {
try {
new this(this.parser(string));
return true;
} catch (e) {
return false;
}
};
// Checks if a given string is a full four-part IPv4 Address.
ipaddr.IPv4.isValidFourPartDecimal = function (string) {
if (ipaddr.IPv4.isValid(string) && string.match(/^(0|[1-9]\d*)(\.(0|[1-9]\d*)){3}$/)) {
return true;
} else {
return false;
}
};
// A utility function to return network address given the IPv4 interface and prefix length in CIDR notation
ipaddr.IPv4.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 < 4) {
// 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 IPv4 CIDR format');
}
};
// Tries to parse and validate a string with IPv4 address.
// Throws an error if it fails.
ipaddr.IPv4.parse = function (string) {
const parts = this.parser(string);
if (parts === null) {
throw new Error('ipaddr: string is not formatted like an IPv4 Address');
}
return new this(parts);
};
// Parses the string as an IPv4 Address with CIDR Notation.
ipaddr.IPv4.parseCIDR = function (string) {
let match;
if ((match = string.match(/^(.+)\/(\d+)$/))) {
const maskLength = parseInt(match[2]);
if (maskLength >= 0 && maskLength <= 32) {
const 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 IPv4 CIDR range');
};
// Classful variants (like a.b, where a is an octet, and b is a 24-bit
// value representing last three octets; this corresponds to a class C
// address) are omitted due to classless nature of modern Internet.
ipaddr.IPv4.parser = function (string) {
let match, part, value;
// parseInt recognizes all that octal & hexadecimal weirdness for us
if ((match = string.match(ipv4Regexes.fourOctet))) {
return (function () {
const ref = match.slice(1, 6);
const results = [];
for (let i = 0; i < ref.length; i++) {
part = ref[i];
results.push(parseIntAuto(part));
}
return results;
})();
} else if ((match = string.match(ipv4Regexes.longValue))) {
value = parseIntAuto(match[1]);
if (value > 0xffffffff || value < 0) {
throw new Error('ipaddr: address outside defined range');
}
return ((function () {
const results = [];
let shift;
for (shift = 0; shift <= 24; shift += 8) {
results.push((value >> shift) & 0xff);
}
return results;
})()).reverse();
} else if ((match = string.match(ipv4Regexes.twoOctet))) {
return (function () {
const ref = match.slice(1, 4);
const results = [];
value = parseIntAuto(ref[1]);
if (value > 0xffffff || value < 0) {
throw new Error('ipaddr: address outside defined range');
}
results.push(parseIntAuto(ref[0]));
results.push((value >> 16) & 0xff);
results.push((value >> 8) & 0xff);
results.push( value & 0xff);
return results;
})();
} else if ((match = string.match(ipv4Regexes.threeOctet))) {
return (function () {
const ref = match.slice(1, 5);
const results = [];
value = parseIntAuto(ref[2]);
if (value > 0xffff || value < 0) {
throw new Error('ipaddr: address outside defined range');
}
results.push(parseIntAuto(ref[0]));
results.push(parseIntAuto(ref[1]));
results.push((value >> 8) & 0xff);
results.push( value & 0xff);
return results;
})();
} else {
return null;
}
};
// A utility function to return subnet mask in IPv4 format given the prefix length
ipaddr.IPv4.subnetMaskFromPrefixLength = function (prefix) {
prefix = parseInt(prefix);
if (prefix < 0 || prefix > 32) {
throw new Error('ipaddr: invalid IPv4 prefix length');
}
const octets = [0, 0, 0, 0];
let j = 0;
const filledOctetCount = Math.floor(prefix / 8);
while (j < filledOctetCount) {
octets[j] = 255;
j++;
}
if (filledOctetCount < 4) {
octets[filledOctetCount] = Math.pow(2, prefix % 8) - 1 << 8 - (prefix % 8);
}
return new this(octets);
};
// An IPv6 address (RFC2460)
ipaddr.IPv6 = (function () {
// Constructs an IPv6 address from an array of eight 16 - bit parts
// or sixteen 8 - bit parts in network order(MSB first).
// Throws an error if the input is invalid.
function IPv6 (parts, zoneId) {
let i, part;
if (parts.length === 16) {
this.parts = [];
for (i = 0; i <= 14; i += 2) {
this.parts.push((parts[i] << 8) | parts[i + 1]);
}
} else if (parts.length === 8) {
this.parts = parts;
} else {
throw new Error('ipaddr: ipv6 part count should be 8 or 16');
}
for (i = 0; i < this.parts.length; i++) {
part = this.parts[i];
if (!((0 <= part && part <= 0xffff))) {
throw new Error('ipaddr: ipv6 part should fit in 16 bits');
}
}
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]],
benchmarking: [new IPv6([0x2001, 0x2, 0, 0, 0, 0, 0, 0]), 48],
amt: [new IPv6([0x2001, 0x3, 0, 0, 0, 0, 0, 0]), 32],
as112v6: [new IPv6([0x2001, 0x4, 0x112, 0, 0, 0, 0, 0]), 48],
deprecated: [new IPv6([0x2001, 0x10, 0, 0, 0, 0, 0, 0]), 28],
orchid2: [new IPv6([0x2001, 0x20, 0, 0, 0, 0, 0, 0]), 28]
};
// 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));