@aikidosec/firewall/sources/http-server/ipAllowedToAccessRoute.js

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.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ipAllowedToAccessRoute = ipAllowedToAccessRoute;
const isLocalhostIP_1 = require("../../helpers/isLocalhostIP");
function ipAllowedToAccessRoute(context, agent) {
    // Always allow localhost IPs
    if (context.remoteAddress && (0, isLocalhostIP_1.isLocalhostIP)(context.remoteAddress)) {
        return true;
    }
    // Get all matching endpoints with allowedIPAddresses defined
    const matches = agent
        .getConfig()
        .getEndpoints(context)
        .filter((m) => m.allowedIPAddresses !== undefined);
    if (!matches.length) {
        // No matches found, so we can allow access
        return true;
    }
    if (!context.remoteAddress) {
        // Always block if remote address is unknown
        return false;
    }
    // Check exact match first
    // If exact match allows the IP address, we can allow access without checking other matching endpoint configurations
    const exact = matches.find((m) => m.route === context.route);
    if (exact && exact.allowedIPAddresses) {
        if (exact.allowedIPAddresses.has(context.remoteAddress)) {
            return true;
        }
    }
    for (const endpoint of matches) {
        const { allowedIPAddresses } = endpoint;
        if (!allowedIPAddresses.has(context.remoteAddress)) {
            return false;
        }
    }
    return true;
}