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diff --git a/apps/examples/igmp/igmp.c b/apps/examples/igmp/igmp.c
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+/****************************************************************************
+ * examples/igmp/igmp.c
+ *
+ *   Copyright (C) 2010-2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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 <stdint.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <debug.h>
+
+#include <net/if.h>
+#include <nuttx/net/uip/uip.h>
+#include <apps/netutils/uiplib.h>
+#include <apps/netutils/ipmsfilter.h>
+
+#include "igmp.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/* Check if the destination address is a multicast address
+ *
+ * - IPv4: multicast addresses lie in the class D group -- The address range
+ *   224.0.0.0 to 239.255.255.255 (224.0.0.0/4)
+ *
+ * - IPv6 multicast addresses are have the high-order octet of the
+ *   addresses=0xff (ff00::/8.)
+ */
+
+#if ((CONFIG_EXAMPLE_IGMP_GRPADDR & 0xffff0000) < 0xe0000000ul) || \
+    ((CONFIG_EXAMPLE_IGMP_GRPADDR & 0xffff0000) > 0xeffffffful)
+#  error "Bad range for IGMP group address"
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * igmp_main
+ ****************************************************************************/
+
+int igmp_main(int argc, char *argv[])
+{
+  struct in_addr addr;
+#if defined(CONFIG_EXAMPLE_IGMP_NOMAC)
+  uint8_t mac[IFHWADDRLEN];
+#endif
+
+  message("Configuring Ethernet...\n");
+  
+  /* Many embedded network interfaces must have a software assigned MAC */
+
+#ifdef CONFIG_EXAMPLE_IGMP_NOMAC
+  mac[0] = 0x00;
+  mac[1] = 0xe0;
+  mac[2] = 0xde;
+  mac[3] = 0xad;
+  mac[4] = 0xbe;
+  mac[5] = 0xef;
+  uip_setmacaddr("eth0", mac);
+#endif
+
+  /* Set up our host address */
+
+  addr.s_addr = HTONL(CONFIG_EXAMPLE_IGMP_IPADDR);
+  uip_sethostaddr("eth0", &addr);
+
+  /* Set up the default router address */
+
+  addr.s_addr = HTONL(CONFIG_EXAMPLE_IGMP_DRIPADDR);
+  uip_setdraddr("eth0", &addr);
+
+  /* Setup the subnet mask */
+
+  addr.s_addr = HTONL(CONFIG_EXAMPLE_IGMP_NETMASK);
+  uip_setnetmask("eth0", &addr);
+
+  /* Not much of a test for now */
+  /* Join the group */
+
+  message("Join group...\n");
+  addr.s_addr = HTONL(CONFIG_EXAMPLE_IGMP_GRPADDR);
+  ipmsfilter("eth0", &addr, MCAST_INCLUDE);
+
+  /* Wait a while */
+
+  message("Wait for timeout...\n");
+  sleep(5);
+
+  /* Leave the group */
+
+  message("Leave group...\n");
+  ipmsfilter("eth0", &addr, MCAST_EXCLUDE);
+
+  /* Wait a while */
+
+  sleep(5);
+  message("Exiting...\n");
+  return 0;
+}