From b51554d765616f17fd165ad4477a8cfad1c243ea Mon Sep 17 00:00:00 2001 From: Christopher Jeffrey Date: Mon, 19 Dec 2016 02:28:56 -0800 Subject: [PATCH] utils: rewrite ip module. --- lib/utils/ip.js | 352 +++++++++++++++++++++++++++++--------- vendor/ip.js | 439 ------------------------------------------------ 2 files changed, 273 insertions(+), 518 deletions(-) delete mode 100644 vendor/ip.js diff --git a/lib/utils/ip.js b/lib/utils/ip.js index b758d397..a4007c44 100644 --- a/lib/utils/ip.js +++ b/lib/utils/ip.js @@ -1,25 +1,35 @@ /*! * ip.js - ip utils for bcoin - * Copyright (c) 2014-2015, Fedor Indutny (MIT License) + * Copyright (c) 2014-2015, Fedor Indutny (MIT License). * Copyright (c) 2014-2016, Christopher Jeffrey (MIT License). * https://github.com/bcoin-org/bcoin + * + * Parts of this software are based on node-ip. + * https://github.com/indutny/node-ip + * Copyright (c) 202, Fedor Indutny (MIT License). */ 'use strict'; -var IP = require('../../vendor/ip'); var assert = require('assert'); +var IP = exports; + +/* + * Constants + */ + +var ipv4Regex = /^(\d{1,3}\.){3}\d{1,3}$/; +var ipv6Regex = + /^(::)?(((\d{1,3}\.){3}(\d{1,3}){1})?([0-9a-f]){0,4}:{0,2}){1,8}(::)?$/i; /** * Parse a hostname. - * @example - * IP.parseHost('127.0.0.1:3000'); * @param {String} addr * @param {Number?} fallback - Fallback port. - * @returns {Object} Contains `host` and `port`. + * @returns {Object} Contains `host`, `port`, and `version`. */ -exports.parseHost = function parseHost(addr, fallback) { +IP.parseHost = function parseHost(addr, fallback) { var port = fallback || 0; var parts, host, version; @@ -54,10 +64,10 @@ exports.parseHost = function parseHost(addr, fallback) { port = parseInt(port, 10); } - version = exports.version(host); + version = IP.version(host); if (version !== -1) - host = exports.normalize(host); + host = IP.normalize(host); return new Address(host, port, version); }; @@ -69,7 +79,7 @@ exports.parseHost = function parseHost(addr, fallback) { * @returns {String} */ -exports.hostname = function hostname(host, port) { +IP.hostname = function hostname(host, port) { var version; assert(typeof host === 'string'); @@ -78,10 +88,10 @@ exports.hostname = function hostname(host, port) { assert(!/[\[\]]/.test(host), 'Bad host.'); - version = exports.version(host); + version = IP.version(host); if (version !== -1) - host = exports.normalize(host); + host = IP.normalize(host); if (version === 6) host = '[' + host + ']'; @@ -91,104 +101,310 @@ exports.hostname = function hostname(host, port) { /** * Test whether a string is an IP address. - * @param {String?} ip + * @param {String?} str * @returns {Number} IP version (4 or 6). */ -exports.version = function version(ip) { - assert(typeof ip === 'string'); +IP.version = function version(str) { + assert(typeof str === 'string'); - if (IP.isV4Format(ip)) + if (IP.isV4Format(str)) return 4; - if (IP.isV6Format(ip)) + if (IP.isV6Format(str)) return 6; return -1; }; /** - * Test whether a buffer is an ipv4-mapped ipv6 address. - * @param {Buffer} ip + * Test whether a string is IPv4. + * @param {String?} str * @returns {Boolean} */ -exports.isMapped = function isMapped(ip) { +IP.isV4Format = function(str) { + return ipv4Regex.test(str); +}; + +/** + * Test whether a string is IPv6. + * @param {String?} str + * @returns {Boolean} + */ + +IP.isV6Format = function(str) { + return ipv6Regex.test(str); +}; + +/** + * Test whether a buffer is an ipv4-mapped ipv6 address. + * @param {Buffer} buf + * @returns {Boolean} + */ + +IP.isMapped = function isMapped(buf) { var i; - assert(Buffer.isBuffer(ip)); - assert(ip.length === 16); + assert(Buffer.isBuffer(buf)); + assert(buf.length === 16); - for (i = 0; i < ip.length - 6; i++) { - if (ip[i] !== 0) + if (buf[10] !== 0xff && buf[11] !== 0xff) + return false; + + for (i = 0; i < 10; i++) { + if (buf[i] !== 0) return false; } - if (ip[ip.length - 6] !== 0xff && ip[ip.length - 5] !== 0xff) - return false; - return true; }; /** * Convert an IP string to a buffer. - * @param {String} ip + * @param {String} str * @returns {Buffer} */ -exports.toBuffer = function toBuffer(ip) { - var out; +IP.toBuffer = function(str) { + var buf = new Buffer(16); - assert(typeof ip === 'string'); - assert(exports.version(ip) !== -1); + assert(typeof str === 'string'); - ip = IP.toBuffer(ip); - - if (ip.length === 4) { - out = new Buffer(16); - out.fill(0); - out[10] = 0xff; - out[11] = 0xff; - out[12] = ip[0]; - out[13] = ip[1]; - out[14] = ip[2]; - out[15] = ip[3]; - return out; + if (IP.isV4Format(str)) { + buf.fill(0); + buf[10] = 0xff; + buf[11] = 0xff; + return IP.parseV4(str, buf, 12); } - return ip; + if (IP.isV6Format(str)) + return IP.parseV6(str, buf, 0); + + throw Error('Invalid IP address: ' + str); +}; + +/** + * Convert an IPv4 string to a buffer. + * @private + * @param {String} str + * @param {Buffer} buf + * @param {Number} offset + * @returns {Buffer} + */ + +IP.parseV4 = function parseV4(str, buf, offset) { + var parts = str.split('.'); + var i, ch; + + assert(parts.length === 4); + + for (i = 0; i < parts.length; i++) { + ch = parts[i]; + assert(ch.length > 0); + assert(ch.length <= 3); + ch = parseInt(ch, 10); + assert(ch >= 0 && ch <= 255); + buf[offset++] = ch; + } + + return buf; +}; + +/** + * Convert an IPv6 string to a buffer. + * @private + * @param {String} str + * @param {Buffer} buf + * @param {Number} offset + * @returns {Buffer} + */ + +IP.parseV6 = function parseV6(str, buf, offset) { + var parts = str.split(':'); + var missing = 8 - parts.length; + var start = offset; + var len = parts.length; + var i = 0; + var word; + + assert(missing >= 0, 'IPv6 address is too long.'); + assert(parts.length >= 2, 'Not an IPv6 address.'); + + if (parts[0].length === 0) { + assert(parts[1].length === 0, + 'Empty leading colon in IPv6 address.'); + missing += 1; + i++; + } else if (parts[len - 1].length === 0) { + assert(parts[len - 2].length === 0, + 'Empty trailing colon in IPv6 address.'); + missing += 1; + len--; + } + + for (; i < len; i++) { + word = parts[i]; + + if (word.length === 0) { + assert(missing > 0, 'Overuse of double colon in IPv6 address.'); + + missing += 1; + + // Eat extra colons. + // e.g. :::0 + while (i + 1 < len) { + word = parts[i + 1]; + if (word.length !== 0) + break; + missing += 1; + i++; + } + + while (missing > 0) { + buf[offset++] = 0; + buf[offset++] = 0; + missing--; + } + + continue; + } + + if (IP.isV4Format(word)) { + IP.parseV4(word, buf, offset); + offset += 4; + continue; + } + + assert(word.length <= 4); + + word = parseInt(word, 16); + + assert(word === word, 'Non-number in IPv6 address.'); + + buf[offset++] = (word >> 8) & 0xff; + buf[offset++] = word & 0xff; + } + + assert(missing === 0, 'IPv6 address has missing sections.'); + assert.equal(offset, start + 16); + + return buf; }; /** * Convert a buffer to an ip string. - * @param {Buffer} ip + * @param {Buffer} buf * @returns {String} */ -exports.toString = function toString(ip) { - assert(Buffer.isBuffer(ip)); - assert(ip.length === 16); +IP.toString = function(buf) { + var str = ''; + var i; - if (exports.isMapped(ip)) { - return ip[ip.length - 4] - + '.' + ip[ip.length - 3] - + '.' + ip[ip.length - 2] - + '.' + ip[ip.length - 1]; + assert(Buffer.isBuffer(buf)); + + if (buf.length === 4) { + str += buf[0]; + str += '.' + buf[1]; + str += '.' + buf[2]; + str += '.' + buf[3]; + return str; } - return IP.toString(ip); + if (buf.length === 16) { + if (IP.isMapped(buf)) { + str += buf[12]; + str += '.' + buf[13]; + str += '.' + buf[14]; + str += '.' + buf[15]; + return str; + } + + str += buf.readUInt16BE(0, true).toString(16); + + for (i = 2; i < 16; i += 2) { + str += ':'; + str += buf.readUInt16BE(i, true).toString(16); + } + + str = str.replace(/(^|:)0(:0)*:0(:|$)/, '$1::$3'); + str = str.replace(/:{3,4}/, '::'); + + return str; + } + + throw Error('Invalid IP address: ' + buf.toString('hex')); }; /** * Normalize an ip. - * @param {String} ip + * @param {String} str * @returns {String} */ -exports.normalize = function normalize(ip) { - return exports.toString(exports.toBuffer(ip)); +IP.normalize = function normalize(str) { + return IP.toString(IP.toBuffer(str)); }; +/** + * Test whether a string is a private address. + * @param {String} str + * @returns {Boolean} + */ + +IP.isPrivate = function(str) { + return /^(::f{4}:)?10\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$/i.test(str) + || /^(::f{4}:)?192\.168\.([0-9]{1,3})\.([0-9]{1,3})$/i.test(str) + || /^(::f{4}:)?172\.(1[6-9]|2\d|30|31)\.([0-9]{1,3})\.([0-9]{1,3})$/i.test(str) + || /^(::f{4}:)?127\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$/i.test(str) + || /^(::f{4}:)?169\.254\.([0-9]{1,3})\.([0-9]{1,3})$/i.test(str) + || /^f[cd][0-9a-f]{2}:/i.test(str) + || /^fe80:/i.test(str) + || /^::1$/.test(str) + || /^::$/.test(str); +}; + +/** + * Test whether a string is a public address. + * @param {String} str + * @returns {Boolean} + */ + +IP.isPublic = function(str) { + return !IP.isPrivate(str); +}; + +/** + * Test whether a string is a loopback address. + * @param {String} str + * @returns {Boolean} + */ + +IP.isLoopback = function(str) { + return /^(::f{4}:)?127\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})/.test(str) + || /^fe80::1$/.test(str) + || /^::1$/.test(str) + || /^::$/.test(str); +}; + +/** + * Get loopback address for ip family. + * @param {String} family - ipv4 or ipv6. + * @returns {String} + */ + +IP.loopback = function(family) { + if (!family) + family = 'ipv4'; + + family = family.toLowerCase(); + + if (family !== 'ipv4' && family !== 'ipv6') + throw new Error('Family must be ipv4 or ipv6.'); + + return family === 'ipv4' ? '127.0.0.1' : 'fe80::1'; +}; /* * Helpers @@ -199,25 +415,3 @@ function Address(host, port, version) { this.port = port; this.version = version; } - -/* - * Expose IP functions. - */ - -exports.isV4Format = IP.isV4Format; -exports.isV6Format = IP.isV6Format; -exports.fromPrefixLen = IP.fromPrefixLen; -exports.mask = IP.mask; -exports.cidr = IP.cidr; -exports.subnet = IP.subnet; -exports.cidrSubnet = IP.cidrSubnet; -exports.not = IP.not; -exports.or = IP.or; -exports.isEqual = IP.isEqual; -exports.isPrivate = IP.isPrivate; -exports.isPublic = IP.isPublic; -exports.isLoopback = IP.isLoopback; -exports.loopback = IP.loopback; -exports.address = IP.address; -exports.toLong = IP.toLong; -exports.fromLong = IP.fromLong; diff --git a/vendor/ip.js b/vendor/ip.js deleted file mode 100644 index ad182714..00000000 --- a/vendor/ip.js +++ /dev/null @@ -1,439 +0,0 @@ -'use strict'; - -/*! - * https://github.com/indutny/node-ip - * - * This software is licensed under the MIT License. - * - * Copyright Fedor Indutny, 2012. - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to - * deal in the Software without restriction, including without limitation the - * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or - * sell copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS - * IN THE SOFTWARE. - */ - -var os = require('os'); -var ip = exports; - -ip.toBuffer = function(ip, buff, offset) { - offset = ~~offset; - - var result; - - if (this.isV4Format(ip)) { - result = buff || new Buffer(offset + 4); - ip.split(/\./g).map(function(byte) { - result[offset++] = parseInt(byte, 10) & 0xff; - }); - } else if (this.isV6Format(ip)) { - var sections = ip.split(':', 8); - - var i; - for (i = 0; i < sections.length; i++) { - var isv4 = this.isV4Format(sections[i]); - var v4Buffer; - - if (isv4) { - v4Buffer = this.toBuffer(sections[i]); - sections[i] = v4Buffer.slice(0, 2).toString('hex'); - } - - if (v4Buffer && ++i < 8) { - sections.splice(i, 0, v4Buffer.slice(2, 4).toString('hex')); - } - } - - if (sections[0] === '') { - while (sections.length < 8) sections.unshift('0'); - } else if (sections[sections.length - 1] === '') { - while (sections.length < 8) sections.push('0'); - } else if (sections.length < 8) { - for (i = 0; i < sections.length && sections[i] !== ''; i++); - var argv = [ i, 1 ]; - for (i = 9 - sections.length; i > 0; i--) { - argv.push('0'); - } - sections.splice.apply(sections, argv); - } - - result = buff || new Buffer(offset + 16); - for (i = 0; i < sections.length; i++) { - var word = parseInt(sections[i], 16); - result[offset++] = (word >> 8) & 0xff; - result[offset++] = word & 0xff; - } - } - - if (!result) { - throw Error('Invalid ip address: ' + ip); - } - - return result; -}; - -ip.toString = function(buff, offset, length) { - offset = ~~offset; - length = length || (buff.length - offset); - - var result = []; - if (length === 4) { - // IPv4 - for (var i = 0; i < length; i++) { - result.push(buff[offset + i]); - } - result = result.join('.'); - } else if (length === 16) { - // IPv6 - for (var i = 0; i < length; i += 2) { - result.push(buff.readUInt16BE(offset + i).toString(16)); - } - result = result.join(':'); - result = result.replace(/(^|:)0(:0)*:0(:|$)/, '$1::$3'); - result = result.replace(/:{3,4}/, '::'); - } - - return result; -}; - -var ipv4Regex = /^(\d{1,3}\.){3,3}\d{1,3}$/; -var ipv6Regex = - /^(::)?(((\d{1,3}\.){3}(\d{1,3}){1})?([0-9a-f]){0,4}:{0,2}){1,8}(::)?$/i; - -ip.isV4Format = function(ip) { - return ipv4Regex.test(ip); -}; - -ip.isV6Format = function(ip) { - return ipv6Regex.test(ip); -}; -function _normalizeFamily(family) { - return family ? family.toLowerCase() : 'ipv4'; -} - -ip.fromPrefixLen = function(prefixlen, family) { - if (prefixlen > 32) { - family = 'ipv6'; - } else { - family = _normalizeFamily(family); - } - - var len = 4; - if (family === 'ipv6') { - len = 16; - } - var buff = new Buffer(len); - - for (var i = 0, n = buff.length; i < n; ++i) { - var bits = 8; - if (prefixlen < 8) { - bits = prefixlen; - } - prefixlen -= bits; - - buff[i] = ~(0xff >> bits); - } - - return ip.toString(buff); -}; - -ip.mask = function(addr, mask) { - addr = ip.toBuffer(addr); - mask = ip.toBuffer(mask); - - var result = new Buffer(Math.max(addr.length, mask.length)); - - // Same protocol - do bitwise and - if (addr.length === mask.length) { - for (var i = 0; i < addr.length; i++) { - result[i] = addr[i] & mask[i]; - } - } else if (mask.length === 4) { - // IPv6 address and IPv4 mask - // (Mask low bits) - for (var i = 0; i < mask.length; i++) { - result[i] = addr[addr.length - 4 + i] & mask[i]; - } - } else { - // IPv6 mask and IPv4 addr - for (var i = 0; i < result.length - 6; i++) { - result[i] = 0; - } - - // ::ffff:ipv4 - result[10] = 0xff; - result[11] = 0xff; - for (var i = 0; i < addr.length; i++) { - result[i + 12] = addr[i] & mask[i + 12]; - } - } - - return ip.toString(result); -}; - -ip.cidr = function(cidrString) { - var cidrParts = cidrString.split('/'); - - var addr = cidrParts[0]; - if (cidrParts.length !== 2) - throw new Error('invalid CIDR subnet: ' + addr); - - var mask = ip.fromPrefixLen(parseInt(cidrParts[1], 10)); - - return ip.mask(addr, mask); -}; - -ip.subnet = function(addr, mask) { - var networkAddress = ip.toLong(ip.mask(addr, mask)); - - // Calculate the mask's length. - var maskBuffer = ip.toBuffer(mask); - var maskLength = 0; - - for (var i = 0; i < maskBuffer.length; i++) { - if (maskBuffer[i] === 0xff) { - maskLength += 8; - } else { - var octet = maskBuffer[i] & 0xff; - while (octet) { - octet = (octet << 1) & 0xff; - maskLength++; - } - } - } - - var numberOfAddresses = Math.pow(2, 32 - maskLength); - - return { - networkAddress: ip.fromLong(networkAddress), - firstAddress: numberOfAddresses <= 2 ? - ip.fromLong(networkAddress) : - ip.fromLong(networkAddress + 1), - lastAddress: numberOfAddresses <= 2 ? - ip.fromLong(networkAddress + numberOfAddresses - 1) : - ip.fromLong(networkAddress + numberOfAddresses - 2), - broadcastAddress: ip.fromLong(networkAddress + numberOfAddresses - 1), - subnetMask: mask, - subnetMaskLength: maskLength, - numHosts: numberOfAddresses <= 2 ? - numberOfAddresses : numberOfAddresses - 2, - length: numberOfAddresses, - contains: function(other) { - return networkAddress === ip.toLong(ip.mask(other, mask)); - } - }; -}; - -ip.cidrSubnet = function(cidrString) { - var cidrParts = cidrString.split('/'); - - var addr = cidrParts[0]; - if (cidrParts.length !== 2) - throw new Error('invalid CIDR subnet: ' + addr); - - var mask = ip.fromPrefixLen(parseInt(cidrParts[1], 10)); - - return ip.subnet(addr, mask); -}; - -ip.not = function(addr) { - var buff = ip.toBuffer(addr); - for (var i = 0; i < buff.length; i++) { - buff[i] = 0xff ^ buff[i]; - } - return ip.toString(buff); -}; - -ip.or = function(a, b) { - a = ip.toBuffer(a); - b = ip.toBuffer(b); - - // same protocol - if (a.length === b.length) { - for (var i = 0; i < a.length; ++i) { - a[i] |= b[i]; - } - return ip.toString(a); - - // mixed protocols - } else { - var buff = a; - var other = b; - if (b.length > a.length) { - buff = b; - other = a; - } - - var offset = buff.length - other.length; - for (var i = offset; i < buff.length; ++i) { - buff[i] |= other[i - offset]; - } - - return ip.toString(buff); - } -}; - -ip.isEqual = function(a, b) { - a = ip.toBuffer(a); - b = ip.toBuffer(b); - - // Same protocol - if (a.length === b.length) { - for (var i = 0; i < a.length; i++) { - if (a[i] !== b[i]) return false; - } - return true; - } - - // Swap - if (b.length === 4) { - var t = b; - b = a; - a = t; - } - - // a - IPv4, b - IPv6 - for (var i = 0; i < 10; i++) { - if (b[i] !== 0) return false; - } - - var word = b.readUInt16BE(10); - if (word !== 0 && word !== 0xffff) return false; - - for (var i = 0; i < 4; i++) { - if (a[i] !== b[i + 12]) return false; - } - - return true; -}; - -ip.isPrivate = function(addr) { - return /^(::f{4}:)?10\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$/i - .test(addr) || - /^(::f{4}:)?192\.168\.([0-9]{1,3})\.([0-9]{1,3})$/i.test(addr) || - /^(::f{4}:)?172\.(1[6-9]|2\d|30|31)\.([0-9]{1,3})\.([0-9]{1,3})$/i - .test(addr) || - /^(::f{4}:)?127\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$/i.test(addr) || - /^(::f{4}:)?169\.254\.([0-9]{1,3})\.([0-9]{1,3})$/i.test(addr) || - /^f[cd][0-9a-f]{2}:/i.test(addr) || - /^fe80:/i.test(addr) || - /^::1$/.test(addr) || - /^::$/.test(addr); -}; - -ip.isPublic = function(addr) { - return !ip.isPrivate(addr); -}; - -ip.isLoopback = function(addr) { - return /^(::f{4}:)?127\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})/ - .test(addr) || - /^fe80::1$/.test(addr) || - /^::1$/.test(addr) || - /^::$/.test(addr); -}; - -ip.loopback = function(family) { - // - // Default to `ipv4` - // - family = _normalizeFamily(family); - - if (family !== 'ipv4' && family !== 'ipv6') { - throw new Error('family must be ipv4 or ipv6'); - } - - return family === 'ipv4' ? '127.0.0.1' : 'fe80::1'; -}; - -// -// ### function address (name, family) -// #### @name {string|'public'|'private'} **Optional** Name or security -// of the network interface. -// #### @family {ipv4|ipv6} **Optional** IP family of the address (defaults -// to ipv4). -// -// Returns the address for the network interface on the current system with -// the specified `name`: -// * String: First `family` address of the interface. -// If not found see `undefined`. -// * 'public': the first public ip address of family. -// * 'private': the first private ip address of family. -// * undefined: First address with `ipv4` or loopback address `127.0.0.1`. -// -ip.address = function(name, family) { - if (os.unsupported) - return '127.0.0.1'; - - var interfaces = os.networkInterfaces(); - - // - // Default to `ipv4` - // - family = _normalizeFamily(family); - - // - // If a specific network interface has been named, - // return the address. - // - if (name && name !== 'private' && name !== 'public') { - var res = interfaces[name].filter(function(details) { - var itemFamily = details.family.toLowerCase(); - return itemFamily === family; - }); - if (res.length === 0) - return undefined; - return res[0].address; - } - - var all = Object.keys(interfaces).map(function (nic) { - // - // Note: name will only be `public` or `private` - // when this is called. - // - var addresses = interfaces[nic].filter(function (details) { - details.family = details.family.toLowerCase(); - if (details.family !== family || ip.isLoopback(details.address)) { - return false; - } else if (!name) { - return true; - } - - return name === 'public' ? ip.isPrivate(details.address) : - ip.isPublic(details.address); - }); - - return addresses.length ? addresses[0].address : undefined; - }).filter(Boolean); - - return !all.length ? ip.loopback(family) : all[0]; -}; - -ip.toLong = function(ip) { - var ipl = 0; - ip.split('.').forEach(function(octet) { - ipl <<= 8; - ipl += parseInt(octet); - }); - return(ipl >>> 0); -}; - -ip.fromLong = function(ipl) { - return ((ipl >>> 24) + '.' + - (ipl >> 16 & 255) + '.' + - (ipl >> 8 & 255) + '.' + - (ipl & 255) ); -};