@aikidosec/firewall
Version:
Zen by Aikido is an embedded Application Firewall that autonomously protects Node.js apps against common and critical attacks, provides rate limiting, detects malicious traffic (including bots), and more.
72 lines (71 loc) • 2.22 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.ip = ip;
const os = require("os");
/**
* Get the IP Address of the machine running this code
*/
function ip(interfaceName) {
const item = getInterfaceAddress("IPv4", interfaceName);
/* c8 ignore next */
return item === null || item === void 0 ? void 0 : item.address;
}
function getDefaultInterfaceName() {
let val = "eth";
const platform = os.platform();
if (platform === "darwin") {
val = "en";
}
else if (platform === "win32") {
val = undefined;
}
return val;
}
function matchName(actualFamily, expectedFamily) {
if (expectedFamily === "IPv4") {
return actualFamily === "IPv4" || actualFamily === 4;
}
/* c8 ignore start */
if (expectedFamily === "IPv6") {
return actualFamily === "IPv6" || actualFamily === 6;
}
return actualFamily === expectedFamily;
}
/* c8 ignore stop */
function getInterfaceAddress(family, name) {
const interfaces = os.networkInterfaces();
const noName = !name;
name = name || getDefaultInterfaceName();
/* c8 ignore next */
family = family || "IPv4";
if (name) {
for (let i = -1; i < 8; i++) {
const interfaceName = name + (i >= 0 ? i : ""); // support 'lo' and 'lo0'
const items = interfaces[interfaceName];
if (items) {
for (const item of items) {
if (matchName(item.family, family)) {
return item;
}
} /* c8 ignore start */
}
}
}
/* c8 ignore stop */
if (noName) {
// filter all loopback or local addresses
for (const k in interfaces) {
const items = interfaces[k];
if (items) {
for (const item of items) {
// all 127 addresses are local and should be ignored
if (matchName(item.family, family) &&
!item.address.startsWith("127.")) {
return item;
}
}
} /* c8 ignore start */
}
}
/* c8 ignore stop */
}