Support IPv6 endpoint (#707)

include/aws/crt/DnsUtils.h

@@ -0,0 +1,17 @@
+#pragma once
+/**
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0.
+ */
+#include <aws/crt/Exports.h>
+
+namespace Aws
+{
+    namespace Crt
+    {
+        namespace DnsUtils
+        {
+            AWS_CRT_CPP_API bool IsValidIpV6(const char *host, bool is_uri_encoded);
+        } // namespace DnsUtils
+    } // namespace Crt
+} // namespace Aws

source/DnsUtils.cpp

@@ -0,0 +1,24 @@
+/**
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0.
+ */
+
+#include <aws/common/host_utils.h>
+#include <aws/crt/DnsUtils.h>
+#include <aws/crt/Types.h>
+
+namespace Aws
+{
+    namespace Crt
+    {
+        namespace DnsUtils
+        {
+
+            bool IsValidIpV6(const char *host, bool is_uri_encoded)
+            {
+                return aws_host_utils_is_ipv6(Aws::Crt::ByteCursorFromCString(host), is_uri_encoded);
+            }
+
+        } // namespace DnsUtils
+    } // namespace Crt
+} // namespace Aws