| [6a3a178] | 1 | 'use strict';
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| 2 |
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| 3 | var ip = exports;
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| 4 | var Buffer = require('buffer').Buffer;
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| 5 | var os = require('os');
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| 6 |
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| 7 | ip.toBuffer = function(ip, buff, offset) {
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| 8 | offset = ~~offset;
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| 9 |
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| 10 | var result;
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| 11 |
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| 12 | if (this.isV4Format(ip)) {
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| 13 | result = buff || new Buffer(offset + 4);
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| 14 | ip.split(/\./g).map(function(byte) {
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| 15 | result[offset++] = parseInt(byte, 10) & 0xff;
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| 16 | });
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| 17 | } else if (this.isV6Format(ip)) {
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| 18 | var sections = ip.split(':', 8);
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| 19 |
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| 20 | var i;
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| 21 | for (i = 0; i < sections.length; i++) {
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| 22 | var isv4 = this.isV4Format(sections[i]);
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| 23 | var v4Buffer;
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| 24 |
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| 25 | if (isv4) {
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| 26 | v4Buffer = this.toBuffer(sections[i]);
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| 27 | sections[i] = v4Buffer.slice(0, 2).toString('hex');
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| 28 | }
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| 29 |
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| 30 | if (v4Buffer && ++i < 8) {
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| 31 | sections.splice(i, 0, v4Buffer.slice(2, 4).toString('hex'));
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| 32 | }
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| 33 | }
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| 34 |
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| 35 | if (sections[0] === '') {
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| 36 | while (sections.length < 8) sections.unshift('0');
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| 37 | } else if (sections[sections.length - 1] === '') {
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| 38 | while (sections.length < 8) sections.push('0');
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| 39 | } else if (sections.length < 8) {
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| 40 | for (i = 0; i < sections.length && sections[i] !== ''; i++);
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| 41 | var argv = [ i, 1 ];
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| 42 | for (i = 9 - sections.length; i > 0; i--) {
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| 43 | argv.push('0');
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| 44 | }
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| 45 | sections.splice.apply(sections, argv);
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| 46 | }
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| 47 |
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| 48 | result = buff || new Buffer(offset + 16);
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| 49 | for (i = 0; i < sections.length; i++) {
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| 50 | var word = parseInt(sections[i], 16);
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| 51 | result[offset++] = (word >> 8) & 0xff;
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| 52 | result[offset++] = word & 0xff;
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| 53 | }
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| 54 | }
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| 55 |
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| 56 | if (!result) {
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| 57 | throw Error('Invalid ip address: ' + ip);
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| 58 | }
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| 59 |
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| 60 | return result;
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| 61 | };
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| 62 |
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| 63 | ip.toString = function(buff, offset, length) {
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| 64 | offset = ~~offset;
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| 65 | length = length || (buff.length - offset);
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| 66 |
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| 67 | var result = [];
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| 68 | if (length === 4) {
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| 69 | // IPv4
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| 70 | for (var i = 0; i < length; i++) {
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| 71 | result.push(buff[offset + i]);
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| 72 | }
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| 73 | result = result.join('.');
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| 74 | } else if (length === 16) {
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| 75 | // IPv6
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| 76 | for (var i = 0; i < length; i += 2) {
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| 77 | result.push(buff.readUInt16BE(offset + i).toString(16));
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| 78 | }
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| 79 | result = result.join(':');
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| 80 | result = result.replace(/(^|:)0(:0)*:0(:|$)/, '$1::$3');
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| 81 | result = result.replace(/:{3,4}/, '::');
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| 82 | }
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| 83 |
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| 84 | return result;
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| 85 | };
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| 86 |
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| 87 | var ipv4Regex = /^(\d{1,3}\.){3,3}\d{1,3}$/;
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| 88 | var ipv6Regex =
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| 89 | /^(::)?(((\d{1,3}\.){3}(\d{1,3}){1})?([0-9a-f]){0,4}:{0,2}){1,8}(::)?$/i;
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| 90 |
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| 91 | ip.isV4Format = function(ip) {
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| 92 | return ipv4Regex.test(ip);
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| 93 | };
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| 94 |
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| 95 | ip.isV6Format = function(ip) {
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| 96 | return ipv6Regex.test(ip);
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| 97 | };
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| 98 | function _normalizeFamily(family) {
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| 99 | return family ? family.toLowerCase() : 'ipv4';
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| 100 | }
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| 101 |
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| 102 | ip.fromPrefixLen = function(prefixlen, family) {
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| 103 | if (prefixlen > 32) {
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| 104 | family = 'ipv6';
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| 105 | } else {
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| 106 | family = _normalizeFamily(family);
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| 107 | }
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| 108 |
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| 109 | var len = 4;
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| 110 | if (family === 'ipv6') {
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| 111 | len = 16;
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| 112 | }
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| 113 | var buff = new Buffer(len);
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| 114 |
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| 115 | for (var i = 0, n = buff.length; i < n; ++i) {
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| 116 | var bits = 8;
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| 117 | if (prefixlen < 8) {
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| 118 | bits = prefixlen;
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| 119 | }
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| 120 | prefixlen -= bits;
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| 121 |
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| 122 | buff[i] = ~(0xff >> bits) & 0xff;
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| 123 | }
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| 124 |
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| 125 | return ip.toString(buff);
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| 126 | };
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| 127 |
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| 128 | ip.mask = function(addr, mask) {
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| 129 | addr = ip.toBuffer(addr);
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| 130 | mask = ip.toBuffer(mask);
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| 131 |
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| 132 | var result = new Buffer(Math.max(addr.length, mask.length));
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| 133 |
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| 134 | var i = 0;
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| 135 | // Same protocol - do bitwise and
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| 136 | if (addr.length === mask.length) {
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| 137 | for (i = 0; i < addr.length; i++) {
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| 138 | result[i] = addr[i] & mask[i];
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| 139 | }
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| 140 | } else if (mask.length === 4) {
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| 141 | // IPv6 address and IPv4 mask
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| 142 | // (Mask low bits)
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| 143 | for (i = 0; i < mask.length; i++) {
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| 144 | result[i] = addr[addr.length - 4 + i] & mask[i];
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| 145 | }
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| 146 | } else {
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| 147 | // IPv6 mask and IPv4 addr
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| 148 | for (var i = 0; i < result.length - 6; i++) {
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| 149 | result[i] = 0;
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| 150 | }
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| 151 |
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| 152 | // ::ffff:ipv4
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| 153 | result[10] = 0xff;
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| 154 | result[11] = 0xff;
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| 155 | for (i = 0; i < addr.length; i++) {
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| 156 | result[i + 12] = addr[i] & mask[i + 12];
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| 157 | }
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| 158 | i = i + 12;
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| 159 | }
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| 160 | for (; i < result.length; i++)
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| 161 | result[i] = 0;
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| 162 |
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| 163 | return ip.toString(result);
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| 164 | };
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| 165 |
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| 166 | ip.cidr = function(cidrString) {
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| 167 | var cidrParts = cidrString.split('/');
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| 168 |
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| 169 | var addr = cidrParts[0];
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| 170 | if (cidrParts.length !== 2)
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| 171 | throw new Error('invalid CIDR subnet: ' + addr);
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| 172 |
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| 173 | var mask = ip.fromPrefixLen(parseInt(cidrParts[1], 10));
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| 174 |
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| 175 | return ip.mask(addr, mask);
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| 176 | };
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| 177 |
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| 178 | ip.subnet = function(addr, mask) {
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| 179 | var networkAddress = ip.toLong(ip.mask(addr, mask));
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| 180 |
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| 181 | // Calculate the mask's length.
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| 182 | var maskBuffer = ip.toBuffer(mask);
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| 183 | var maskLength = 0;
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| 184 |
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| 185 | for (var i = 0; i < maskBuffer.length; i++) {
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| 186 | if (maskBuffer[i] === 0xff) {
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| 187 | maskLength += 8;
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| 188 | } else {
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| 189 | var octet = maskBuffer[i] & 0xff;
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| 190 | while (octet) {
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| 191 | octet = (octet << 1) & 0xff;
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| 192 | maskLength++;
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| 193 | }
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| 194 | }
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| 195 | }
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| 196 |
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| 197 | var numberOfAddresses = Math.pow(2, 32 - maskLength);
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| 198 |
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| 199 | return {
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| 200 | networkAddress: ip.fromLong(networkAddress),
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| 201 | firstAddress: numberOfAddresses <= 2 ?
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| 202 | ip.fromLong(networkAddress) :
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| 203 | ip.fromLong(networkAddress + 1),
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| 204 | lastAddress: numberOfAddresses <= 2 ?
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| 205 | ip.fromLong(networkAddress + numberOfAddresses - 1) :
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| 206 | ip.fromLong(networkAddress + numberOfAddresses - 2),
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| 207 | broadcastAddress: ip.fromLong(networkAddress + numberOfAddresses - 1),
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| 208 | subnetMask: mask,
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| 209 | subnetMaskLength: maskLength,
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| 210 | numHosts: numberOfAddresses <= 2 ?
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| 211 | numberOfAddresses : numberOfAddresses - 2,
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| 212 | length: numberOfAddresses,
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| 213 | contains: function(other) {
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| 214 | return networkAddress === ip.toLong(ip.mask(other, mask));
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| 215 | }
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| 216 | };
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| 217 | };
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| 218 |
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| 219 | ip.cidrSubnet = function(cidrString) {
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| 220 | var cidrParts = cidrString.split('/');
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| 221 |
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| 222 | var addr = cidrParts[0];
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| 223 | if (cidrParts.length !== 2)
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| 224 | throw new Error('invalid CIDR subnet: ' + addr);
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| 225 |
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| 226 | var mask = ip.fromPrefixLen(parseInt(cidrParts[1], 10));
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| 227 |
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| 228 | return ip.subnet(addr, mask);
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| 229 | };
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| 230 |
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| 231 | ip.not = function(addr) {
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| 232 | var buff = ip.toBuffer(addr);
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| 233 | for (var i = 0; i < buff.length; i++) {
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| 234 | buff[i] = 0xff ^ buff[i];
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| 235 | }
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| 236 | return ip.toString(buff);
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| 237 | };
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| 238 |
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| 239 | ip.or = function(a, b) {
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| 240 | a = ip.toBuffer(a);
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| 241 | b = ip.toBuffer(b);
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| 242 |
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| 243 | // same protocol
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| 244 | if (a.length === b.length) {
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| 245 | for (var i = 0; i < a.length; ++i) {
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| 246 | a[i] |= b[i];
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| 247 | }
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| 248 | return ip.toString(a);
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| 249 |
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| 250 | // mixed protocols
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| 251 | } else {
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| 252 | var buff = a;
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| 253 | var other = b;
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| 254 | if (b.length > a.length) {
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| 255 | buff = b;
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| 256 | other = a;
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| 257 | }
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| 258 |
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| 259 | var offset = buff.length - other.length;
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| 260 | for (var i = offset; i < buff.length; ++i) {
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| 261 | buff[i] |= other[i - offset];
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| 262 | }
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| 263 |
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| 264 | return ip.toString(buff);
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| 265 | }
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| 266 | };
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| 267 |
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| 268 | ip.isEqual = function(a, b) {
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| 269 | a = ip.toBuffer(a);
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| 270 | b = ip.toBuffer(b);
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| 271 |
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| 272 | // Same protocol
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| 273 | if (a.length === b.length) {
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| 274 | for (var i = 0; i < a.length; i++) {
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| 275 | if (a[i] !== b[i]) return false;
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| 276 | }
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| 277 | return true;
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| 278 | }
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| 279 |
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| 280 | // Swap
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| 281 | if (b.length === 4) {
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| 282 | var t = b;
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| 283 | b = a;
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| 284 | a = t;
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| 285 | }
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| 286 |
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| 287 | // a - IPv4, b - IPv6
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| 288 | for (var i = 0; i < 10; i++) {
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| 289 | if (b[i] !== 0) return false;
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| 290 | }
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| 291 |
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| 292 | var word = b.readUInt16BE(10);
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| 293 | if (word !== 0 && word !== 0xffff) return false;
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| 294 |
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| 295 | for (var i = 0; i < 4; i++) {
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| 296 | if (a[i] !== b[i + 12]) return false;
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| 297 | }
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| 298 |
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| 299 | return true;
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| 300 | };
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| 301 |
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| 302 | ip.isPrivate = function(addr) {
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| 303 | return /^(::f{4}:)?10\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$/i
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| 304 | .test(addr) ||
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| 305 | /^(::f{4}:)?192\.168\.([0-9]{1,3})\.([0-9]{1,3})$/i.test(addr) ||
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| 306 | /^(::f{4}:)?172\.(1[6-9]|2\d|30|31)\.([0-9]{1,3})\.([0-9]{1,3})$/i
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| 307 | .test(addr) ||
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| 308 | /^(::f{4}:)?127\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$/i.test(addr) ||
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| 309 | /^(::f{4}:)?169\.254\.([0-9]{1,3})\.([0-9]{1,3})$/i.test(addr) ||
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| 310 | /^f[cd][0-9a-f]{2}:/i.test(addr) ||
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| 311 | /^fe80:/i.test(addr) ||
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| 312 | /^::1$/.test(addr) ||
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| 313 | /^::$/.test(addr);
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| 314 | };
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| 315 |
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| 316 | ip.isPublic = function(addr) {
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| 317 | return !ip.isPrivate(addr);
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| 318 | };
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| 319 |
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| 320 | ip.isLoopback = function(addr) {
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| 321 | return /^(::f{4}:)?127\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})/
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| 322 | .test(addr) ||
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| 323 | /^fe80::1$/.test(addr) ||
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| 324 | /^::1$/.test(addr) ||
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| 325 | /^::$/.test(addr);
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| 326 | };
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| 327 |
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| 328 | ip.loopback = function(family) {
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| 329 | //
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| 330 | // Default to `ipv4`
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| 331 | //
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| 332 | family = _normalizeFamily(family);
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| 333 |
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| 334 | if (family !== 'ipv4' && family !== 'ipv6') {
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| 335 | throw new Error('family must be ipv4 or ipv6');
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| 336 | }
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| 337 |
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| 338 | return family === 'ipv4' ? '127.0.0.1' : 'fe80::1';
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| 339 | };
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| 340 |
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| 341 | //
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| 342 | // ### function address (name, family)
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| 343 | // #### @name {string|'public'|'private'} **Optional** Name or security
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| 344 | // of the network interface.
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| 345 | // #### @family {ipv4|ipv6} **Optional** IP family of the address (defaults
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| 346 | // to ipv4).
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| 347 | //
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| 348 | // Returns the address for the network interface on the current system with
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| 349 | // the specified `name`:
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| 350 | // * String: First `family` address of the interface.
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| 351 | // If not found see `undefined`.
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| 352 | // * 'public': the first public ip address of family.
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| 353 | // * 'private': the first private ip address of family.
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| 354 | // * undefined: First address with `ipv4` or loopback address `127.0.0.1`.
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| 355 | //
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| 356 | ip.address = function(name, family) {
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| 357 | var interfaces = os.networkInterfaces();
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| 358 | var all;
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| 359 |
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| 360 | //
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| 361 | // Default to `ipv4`
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| 362 | //
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| 363 | family = _normalizeFamily(family);
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| 364 |
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| 365 | //
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| 366 | // If a specific network interface has been named,
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| 367 | // return the address.
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| 368 | //
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| 369 | if (name && name !== 'private' && name !== 'public') {
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| 370 | var res = interfaces[name].filter(function(details) {
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| 371 | var itemFamily = details.family.toLowerCase();
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| 372 | return itemFamily === family;
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| 373 | });
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| 374 | if (res.length === 0)
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| 375 | return undefined;
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| 376 | return res[0].address;
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| 377 | }
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| 378 |
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| 379 | var all = Object.keys(interfaces).map(function (nic) {
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| 380 | //
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| 381 | // Note: name will only be `public` or `private`
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| 382 | // when this is called.
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| 383 | //
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| 384 | var addresses = interfaces[nic].filter(function (details) {
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| 385 | details.family = details.family.toLowerCase();
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| 386 | if (details.family !== family || ip.isLoopback(details.address)) {
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| 387 | return false;
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| 388 | } else if (!name) {
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| 389 | return true;
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| 390 | }
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| 391 |
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| 392 | return name === 'public' ? ip.isPrivate(details.address) :
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| 393 | ip.isPublic(details.address);
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| 394 | });
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| 395 |
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| 396 | return addresses.length ? addresses[0].address : undefined;
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| 397 | }).filter(Boolean);
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| 398 |
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| 399 | return !all.length ? ip.loopback(family) : all[0];
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| 400 | };
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| 401 |
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| 402 | ip.toLong = function(ip) {
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| 403 | var ipl = 0;
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| 404 | ip.split('.').forEach(function(octet) {
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| 405 | ipl <<= 8;
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| 406 | ipl += parseInt(octet);
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| 407 | });
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| 408 | return(ipl >>> 0);
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| 409 | };
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| 410 |
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| 411 | ip.fromLong = function(ipl) {
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| 412 | return ((ipl >>> 24) + '.' +
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| 413 | (ipl >> 16 & 255) + '.' +
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| 414 | (ipl >> 8 & 255) + '.' +
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| 415 | (ipl & 255) );
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| 416 | };
|
|---|
