From c53372c9f34fe9cbcc2fd8593ce5bbfaefb3f9db Mon Sep 17 00:00:00 2001
From: Ai Hoshino <ambiguous404@gmail.com>
Date: Tue, 29 Aug 2023 11:10:33 +0800
Subject: feat(node:dns): implement `dns.reverse`. (#4332)

* feat(node:dns): implement `dns.reverse`.
Close: #4299

* fix dns reverse for ipv6

---------

Co-authored-by: Jarred Sumner <jarred@jarredsumner.com>
---
 src/js/node/dns.js | 35 ++++++++++++++++++++++++++++++++---
 1 file changed, 32 insertions(+), 3 deletions(-)

(limited to 'src/js/node/dns.js')

diff --git a/src/js/node/dns.js b/src/js/node/dns.js
index f8e5366f9..a6de07351 100644
--- a/src/js/node/dns.js
+++ b/src/js/node/dns.js
@@ -179,6 +179,21 @@ function lookupService(address, port, callback) {
   callback(null, address, port);
 }
 
+function reverse(ip, callback) {
+  if (typeof callback != "function") {
+    throw new TypeError("callback must be a function");
+  }
+
+  dns.reverse(ip, callback).then(
+    results => {
+      callback(null, results);
+    },
+    error => {
+      callback(error);
+    },
+  );
+}
+
 var InternalResolver = class Resolver {
   constructor(options) {}
 
@@ -395,7 +410,18 @@ var InternalResolver = class Resolver {
   }
 
   reverse(ip, callback) {
-    callback(null, []);
+    if (typeof callback != "function") {
+      throw new TypeError("callback must be a function");
+    }
+
+    dns.reverse(ip, callback).then(
+      results => {
+        callback(null, results);
+      },
+      error => {
+        callback(error);
+      },
+    );
   }
 
   setServers(servers) {}
@@ -549,6 +575,9 @@ const promises = {
   resolveCname(hostname) {
     return dns.resolveCname(hostname);
   },
+  reverse(ip) {
+    return dns.reverse(ip);
+  },
 
   Resolver: class Resolver {
     constructor(options) {}
@@ -627,13 +656,13 @@ const promises = {
     }
 
     reverse(ip) {
-      return Promise.resolve([]);
+      return dns.reverse(ip);
     }
 
     setServers(servers) {}
   },
 };
-for (const key of ["resolveAny", "reverse"]) {
+for (const key of ["resolveAny"]) {
   promises[key] = () => Promise.resolve(undefined);
 }
 
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