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>

1 files changed, 45 insertions, 0 deletions

diff --git a/test/js/node/dns/node-dns.test.js b/test/js/node/dns/node-dns.test.js
index f905a2885..5c08f128f 100644
--- a/test/js/node/dns/node-dns.test.js
+++ b/test/js/node/dns/node-dns.test.js
@@ -223,3 +223,48 @@ test("dns.getServers", done => {
   }
   done();
 });
+
+test("dns.reverse", done => {
+  dns.reverse("8.8.8.8", (err, hostnames) => {
+    try {
+      expect(err).toBeNull();
+      expect(hostnames).toContain("dns.google");
+      done();
+    } catch (err) {
+      done(err);
+    }
+  });
+  dns.reverse("1.1.1.1", (err, hostnames) => {
+    try {
+      expect(err).toBeNull();
+      expect(hostnames).toContain("one.one.one.one");
+      done();
+    } catch (err) {
+      done(err);
+    }
+  });
+  dns.reverse("2606:4700:4700::1111", (err, hostnames) => {
+    try {
+      expect(err).toBeNull();
+      expect(hostnames).toContain("one.one.one.one");
+      done();
+    } catch (err) {
+      done(err);
+    }
+  });
+});
+
+test("dns.promises.reverse", async () => {
+  {
+    let hostnames = await dns.promises.reverse("8.8.8.8");
+    expect(hostnames).toContain("dns.google");
+  }
+  {
+    let hostnames = await dns.promises.reverse("1.1.1.1");
+    expect(hostnames).toContain("one.one.one.one");
+  }
+  {
+    let hostnames = await dns.promises.reverse("2606:4700:4700::1111");
+    expect(hostnames).toContain("one.one.one.one");
+  }
+});