replace ipaddr.js

src/ipaddr.js

@@ -0,0 +1,62 @@
+'use strict';
+
+exports = module.exports = {
+    isValid,
+    isValidCIDR,
+    isEqual,
+    includes,
+};
+
+const assert = require('assert'),
+    net = require('net');
+
+function isValid(ip) {
+    assert.strictEqual(typeof ip, 'string');
+
+    const type = net.isIP(ip);
+    return type === 4 || type === 6;
+}
+
+function isValidCIDR(cidr) {
+    assert.strictEqual(typeof cidr, 'string');
+
+    const parts = cidr.split('/');
+    if (parts.length !== 2) return false;
+
+    const [ ip, prefixString ] = parts;
+    const type = net.isIP(ip);
+    if (type === 0) return false;
+
+    const prefix = Number.parseInt(prefixString, 10);
+    if (!Number.isInteger(prefix) || prefix < 0 || (prefix > (type === 4 ? 32 : 128)) || String(prefix) !== prefixString) return false;
+
+    return true;
+}
+
+function isEqual(ip1, ip2) {
+    assert.strictEqual(typeof ip1, 'string');
+    assert.strictEqual(typeof ip2, 'string');
+
+    if (ip1 === ip2) return true;
+
+    const type1 = net.isIP(ip1), type2 = net.isIP(ip2);
+    if (type1 === 0 || type2 === 0) return false; // otherwise, it will throw invalid socket address below
+
+    // use blocklist to compare since strings may not be in RFC 5952 format
+    const blockList = new net.BlockList();
+    blockList.addAddress(ip1, `ipv${type1}`);
+    return blockList.check(ip2, `ipv${type2}`);
+}
+
+function includes(cidr, ip) {
+    assert.strictEqual(typeof cidr, 'string');
+    assert.strictEqual(typeof ip, 'string');
+
+    const type = net.isIP(ip);
+    const [ subnet, prefix ] = cidr.split('/');
+    const subnetType = net.isIP(subnet);
+
+    const blockList = new net.BlockList();
+    blockList.addSubnet(subnet, parseInt(prefix, 10), `ipv${subnetType}`);
+    return blockList.check(ip, `ipv${type}`);
+}