Initial commit on Forgejo

Fresh repository history for elektrine/elektrine-haraka hosted at
https://git.elektrine.com/elektrine/elektrine-haraka.

plugins/elektrine_local_mx.js

@@ -0,0 +1,79 @@
+/**
+ * Elektrine Local MX Routing Plugin
+ *
+ * Routes local/protected domains to the internal inbound service instead of
+ * external/public MX records. This keeps local delivery on the
+ * inbound -> queue -> worker -> Phoenix path.
+ */
+
+'use strict';
+
+const constants = require('haraka-constants');
+const { domains } = require('../lib');
+
+const DEFAULTS = {
+    enabled: true,
+    host: 'haraka-inbound',
+    port: 25
+};
+
+function to_int(value, fallback) {
+    const parsed = parseInt(value, 10);
+    return Number.isFinite(parsed) ? parsed : fallback;
+}
+
+exports.register = function () {
+    this.load_config();
+    this.register_hook('get_mx', 'route_local_mx');
+
+    domains.init((msg) => this.logdebug(`domains: ${msg}`))
+        .catch((err) => {
+            this.logwarn(`Domain cache init failed: ${err.message}`);
+        });
+
+    if (this.cfg.enabled) {
+        this.loginfo(`Local MX routing enabled -> ${this.cfg.host}:${this.cfg.port}`);
+    } else {
+        this.loginfo('Local MX routing disabled');
+    }
+};
+
+exports.load_config = function () {
+    const plugin = this;
+    const cfg = this.config.get('elektrine_local_mx.ini', {
+        booleans: ['+main.enabled']
+    }, () => {
+        plugin.load_config();
+    });
+
+    const main = (cfg && cfg.main) ? cfg.main : {};
+
+    this.cfg = {
+        enabled: main.enabled !== undefined ? main.enabled : DEFAULTS.enabled,
+        host: main.host || DEFAULTS.host,
+        port: to_int(main.port, DEFAULTS.port)
+    };
+
+    if (process.env.ELEKTRINE_LOCAL_MX_HOST) {
+        this.cfg.host = process.env.ELEKTRINE_LOCAL_MX_HOST;
+    }
+    if (process.env.ELEKTRINE_LOCAL_MX_PORT) {
+        this.cfg.port = to_int(process.env.ELEKTRINE_LOCAL_MX_PORT, this.cfg.port);
+    }
+};
+
+exports.route_local_mx = function (next, hmail, domain) {
+    if (!this.cfg.enabled) return next();
+
+    const recipient_domain = String(domain || '').toLowerCase();
+    if (!recipient_domain) return next();
+
+    if (!domains.is_local_domain(recipient_domain)) return next();
+
+    this.loginfo(`Routing local domain ${recipient_domain} to ${this.cfg.host}:${this.cfg.port}`);
+    return next(constants.OK, {
+        priority: 0,
+        exchange: this.cfg.host,
+        port: this.cfg.port
+    });
+};