revamp to mysql for gateway configuration and major code refactor

lib/middleware.js

@@ -1,12 +1,28 @@
-const {fromInboundTrunk} = require('./utils');
-const config = require('config');
-const authenticator = require('drachtio-http-authenticator')(config.get('authCallback'));
+const debug = require('debug')('jambonz:sbc-inbound');
 
-function auth(req, res, next) {
-  if (fromInboundTrunk(req)) {
-    return next();
+module.exports = function(srf, logger) {
+  const {lookupSipGatewayBySignalingAddress, lookupAuthHook}  = srf.locals.dbHelpers;
+  const authenticator = require('drachtio-http-authenticator')(lookupAuthHook, logger);
+
+  async function challengeDeviceCalls(req, res, next) {
+    req.locals = req.locals || {};
+    try {
+      const gateway = await lookupSipGatewayBySignalingAddress(req.source_address, req.source_port);
+      if (!gateway) {
+        req.locals.originator = 'device';
+        return authenticator(req, res, next);
+      }
+      debug(`challengeDeviceCalls: call came from gateway: ${JSON.stringify(gateway)}`);
+      req.locals.originator = 'trunk';
+      req.locals.carrier = gateway.name;
+      next();
+    } catch (err) {
+      logger.error(err, `${req.get('Call-ID')} Error looking up related info for inbound call`);
+      res.send(500);
+    }
   }
-  authenticator(req, res, next);
-}
 
-module.exports = { auth };
+  return {
+    challengeDeviceCalls
+  };
+};