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diff --git a/apps/netutils/dnsclient/dns_resolver.c b/apps/netutils/dnsclient/dns_resolver.c
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+/****************************************************************************
+ * apps/netutils/dnsclient/dns_resolver.c
+ * DNS host name to IP address resolver.
+ *
+ * The uIP DNS resolver functions are used to lookup a hostname and
+ * map it to a numerical IP address. It maintains a list of resolved
+ * hostnames that can be queried. New hostnames can be resolved using the
+ * dns_whois() function.
+ *
+ *   Copyright (C) 2007, 2009, 2012, 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Based heavily on portions of uIP:
+ *
+ *   Author: Adam Dunkels <adam@dunkels.com>
+ *   Copyright (c) 2002-2003, Adam Dunkels.
+ *   All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <netinet/in.h>
+
+#include <apps/netutils/dnsclient.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static int g_sockfd = -1;
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: dns_bind
+ *
+ * Description:
+ *   Initialize the DNS resolver using an internal, share-able socket.
+ *
+ ****************************************************************************/
+
+int dns_bind(void)
+{
+  return dns_bind_sock(&g_sockfd);
+}
+
+/****************************************************************************
+ * Name: dns_query
+ *
+ * Description:
+ *   Using the internal DNS resolver socket, look up the the 'hostname', and
+ *   return its IP address in 'ipaddr'
+ *
+ * Returned Value:
+ *   Returns zero (OK) if the query was successful.
+ *
+ ****************************************************************************/
+
+int dns_query(FAR const char *hostname, FAR in_addr_t *ipaddr)
+{
+  return dns_query_sock(g_sockfd, hostname, ipaddr);
+}
+
+/****************************************************************************
+ * Name: dns_whois
+ *
+ * Description:
+ *   Get the binding for 'name' using the DNS server accessed via the DNS
+ *   resolvers internal socket.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_NET_IPv6
+int dns_whois(FAR const char *name, FAR struct sockaddr_in6 *addr)
+#else
+int dns_whois(FAR const char *name, FAR struct sockaddr_in *addr)
+#endif
+{
+  return dns_whois_socket(g_sockfd, name, addr);
+}