From e4d9dbb55853ae5e5a2cca5f0514db2a2f5665e5 Mon Sep 17 00:00:00 2001
From: Girish Ramakrishnan <girish@cloudron.io>
Date: Wed, 25 Jan 2023 09:57:07 +0100
Subject: [PATCH] dns: resolve cname records using unbound

cname record can be external and the original NS may not respond to
recursive queries
---
 src/dns/waitfordns.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/dns/waitfordns.js b/src/dns/waitfordns.js
index 582d26e92..8d3a1204c 100644
--- a/src/dns/waitfordns.js
+++ b/src/dns/waitfordns.js
@@ -7,7 +7,8 @@ const assert = require('assert'),
     debug = require('debug')('box:dns/waitfordns'),
     dig = require('../dig.js'),
     promiseRetry = require('../promise-retry.js'),
-    safe = require('safetydance');
+    safe = require('safetydance'),
+    _ = require('underscore');
 
 async function resolveIp(hostname, type, options) {
     assert.strictEqual(typeof hostname, 'string');
@@ -20,12 +21,12 @@ async function resolveIp(hostname, type, options) {
     if (!error && results.length !== 0) return results;
 
     // try CNAME record at authoritative server
-    debug(`resolveIp: Checking if ${hostname} has CNAME record at ${options.server}`);
+    debug(`resolveIp: No A record. Checking if ${hostname} has CNAME record at ${options.server}`);
     const cnameResults = await dig.resolve(hostname, 'CNAME', options);
     if (cnameResults.length === 0) return cnameResults;
 
     // recurse lookup the CNAME record
-    debug(`resolveIp: Resolving ${hostname}'s CNAME record ${cnameResults[0]}`);
+    debug(`resolveIp: CNAME record found. Resolving ${hostname}'s CNAME record ${cnameResults[0]} using unbound`);
     return await dig.resolve(cnameResults[0], type, options);
 }