diff options
Diffstat (limited to 'testing/xpcshell/node_ip/lib/ip.js')
| -rw-r--r-- | testing/xpcshell/node_ip/lib/ip.js | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/testing/xpcshell/node_ip/lib/ip.js b/testing/xpcshell/node_ip/lib/ip.js new file mode 100644 index 0000000000..a66a2555c6 --- /dev/null +++ b/testing/xpcshell/node_ip/lib/ip.js @@ -0,0 +1,416 @@ +'use strict'; + +var ip = exports; +var Buffer = require('buffer').Buffer; +var os = require('os'); + +ip.toBuffer = function(ip, buff, offset) { + offset = ~~offset; + + var result; + + if (this.isV4Format(ip)) { + result = buff || Buffer.alloc(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 || Buffer.alloc(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 = Buffer.alloc(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) & 0xff; + } + + return ip.toString(buff); +}; + +ip.mask = function(addr, mask) { + addr = ip.toBuffer(addr); + mask = ip.toBuffer(mask); + + var result = Buffer.alloc(Math.max(addr.length, mask.length)); + + var i = 0; + // Same protocol - do bitwise and + if (addr.length === mask.length) { + for (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 (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 (i = 0; i < addr.length; i++) { + result[i + 12] = addr[i] & mask[i + 12]; + } + i = i + 12; + } + for (; i < result.length; i++) + result[i] = 0; + + 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) { + var interfaces = os.networkInterfaces(); + var all; + + // + // 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) ); +}; |