1 files changed, 67 insertions, 0 deletions
diff --git a/ext/node/polyfills/internal_binding/ares.ts b/ext/node/polyfills/internal_binding/ares.ts
new file mode 100644
index 000000000..1c9abb038
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+++ b/ext/node/polyfills/internal_binding/ares.ts
@@ -0,0 +1,67 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+/* Copyright 1998 by the Massachusetts Institute of Technology.
+ *
+ * Permission to use, copy, modify, and distribute this
+ * software and its documentation for any purpose and without
+ * fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in
+ * advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ */
+
+// REF: https://github.com/nodejs/node/blob/master/deps/cares/include/ares.h#L190
+
+export const ARES_AI_CANONNAME = 1 << 0;
+export const ARES_AI_NUMERICHOST = 1 << 1;
+export const ARES_AI_PASSIVE = 1 << 2;
+export const ARES_AI_NUMERICSERV = 1 << 3;
+export const AI_V4MAPPED = 1 << 4;
+export const AI_ALL = 1 << 5;
+export const AI_ADDRCONFIG = 1 << 6;
+export const ARES_AI_NOSORT = 1 << 7;
+export const ARES_AI_ENVHOSTS = 1 << 8;
+
+// REF: https://github.com/nodejs/node/blob/master/deps/cares/src/lib/ares_strerror.c
+
+// deno-lint-ignore camelcase
+export function ares_strerror(code: number) {
+  /* Return a string literal from a table. */
+  const errorText = [
+    "Successful completion",
+    "DNS server returned answer with no data",
+    "DNS server claims query was misformatted",
+    "DNS server returned general failure",
+    "Domain name not found",
+    "DNS server does not implement requested operation",
+    "DNS server refused query",
+    "Misformatted DNS query",
+    "Misformatted domain name",
+    "Unsupported address family",
+    "Misformatted DNS reply",
+    "Could not contact DNS servers",
+    "Timeout while contacting DNS servers",
+    "End of file",
+    "Error reading file",
+    "Out of memory",
+    "Channel is being destroyed",
+    "Misformatted string",
+    "Illegal flags specified",
+    "Given hostname is not numeric",
+    "Illegal hints flags specified",
+    "c-ares library initialization not yet performed",
+    "Error loading iphlpapi.dll",
+    "Could not find GetNetworkParams function",
+    "DNS query cancelled",
+  ];
+
+  if (code >= 0 && code < errorText.length) {
+    return errorText[code];
+  } else {
+    return "unknown";
+  }
+}