mirror of https://gitee.com/bigwinds/arangodb
127 lines
4.0 KiB
JavaScript
127 lines
4.0 KiB
JavaScript
(function() {
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var Netmask, ip2long, long2ip;
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long2ip = function(long) {
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var a, b, c, d;
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a = (long & (0xff << 24)) >>> 24;
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b = (long & (0xff << 16)) >>> 16;
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c = (long & (0xff << 8)) >>> 8;
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d = long & 0xff;
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return [a, b, c, d].join('.');
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};
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ip2long = function(ip) {
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var b, byte, i, _len;
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b = (ip + '').split('.');
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if (b.length === 0 || b.length > 4) throw new Error('Invalid IP');
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for (i = 0, _len = b.length; i < _len; i++) {
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byte = b[i];
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if (isNaN(parseInt(byte, 10))) throw new Error("Invalid byte: " + byte);
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if (byte < 0 || byte > 255) throw new Error("Invalid byte: " + byte);
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}
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return ((b[0] || 0) << 24 | (b[1] || 0) << 16 | (b[2] || 0) << 8 | (b[3] || 0)) >>> 0;
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};
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Netmask = (function() {
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function Netmask(net, mask) {
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var i, _ref;
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if (typeof net !== 'string') throw new Error("Missing `net' parameter");
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if (!mask) {
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_ref = net.split('/', 2), net = _ref[0], mask = _ref[1];
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if (!mask) {
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switch (net.split('.').length) {
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case 1:
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mask = 8;
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break;
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case 2:
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mask = 16;
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break;
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case 3:
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mask = 24;
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break;
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case 4:
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mask = 32;
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}
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}
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}
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if (typeof mask === 'string' && mask.indexOf('.') > -1) {
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try {
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this.maskLong = ip2long(mask);
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} catch (error) {
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throw new Error("Invalid mask: " + mask);
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}
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for (i = 32; i >= 0; i--) {
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if (this.maskLong === (0xffffffff << (32 - i)) >>> 0) {
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this.bitmask = i;
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break;
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}
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}
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} else if (mask) {
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this.bitmask = parseInt(mask, 10);
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this.maskLong = (0xffffffff << (32 - this.bitmask)) >>> 0;
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} else {
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throw new Error("Invalid mask: empty");
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}
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try {
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this.netLong = (ip2long(net) & this.maskLong) >>> 0;
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} catch (error) {
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throw new Error("Invalid net address: " + net);
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}
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if (!(this.bitmask <= 32)) throw new Error("Invalid mask for ip4: " + mask);
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this.size = Math.pow(2, 32 - this.bitmask);
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this.base = long2ip(this.netLong);
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this.mask = long2ip(this.maskLong);
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this.hostmask = long2ip(~this.maskLong);
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this.first = this.bitmask <= 30 ? long2ip(this.netLong + 1) : this.base;
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this.last = this.bitmask <= 30 ? long2ip(this.netLong + this.size - 2) : long2ip(this.netLong + this.size - 1);
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this.broadcast = this.bitmask <= 30 ? long2ip(this.netLong + this.size - 1) : void 0;
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}
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Netmask.prototype.contains = function(ip) {
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if (typeof ip === 'string' && (ip.indexOf('/') > 0 || ip.split('.').length !== 4)) {
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ip = new Netmask(ip);
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}
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if (ip instanceof Netmask) {
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return this.contains(ip.base) && this.contains(ip.broadcast);
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} else {
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return (ip2long(ip) & this.maskLong) >>> 0 === (this.netLong & this.maskLong) >>> 0;
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}
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};
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Netmask.prototype.next = function(count) {
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if (count == null) count = 1;
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return new Netmask(long2ip(this.netLong + (this.size * count)), this.mask);
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};
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Netmask.prototype.forEach = function(fn) {
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var index, long, range, _i, _len, _ref, _ref2, _results, _results2;
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range = (function() {
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_results = [];
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for (var _i = _ref = ip2long(this.first), _ref2 = ip2long(this.last); _ref <= _ref2 ? _i <= _ref2 : _i >= _ref2; _ref <= _ref2 ? _i++ : _i--){ _results.push(_i); }
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return _results;
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}).apply(this);
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_results2 = [];
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for (index = 0, _len = range.length; index < _len; index++) {
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long = range[index];
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_results2.push(fn(long2ip(long), long, index));
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}
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return _results2;
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};
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Netmask.prototype.toString = function() {
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return this.base + "/" + this.bitmask;
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};
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return Netmask;
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})();
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exports.ip2long = ip2long;
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exports.long2ip = long2ip;
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exports.Netmask = Netmask;
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}).call(this);
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