Add interfaces flags, extend ifconfig, add ifup and ifdown commands (Darcy Gong

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5308 42af7a65-404d-4744-a932-0658087f49c3

19 files changed, 905 insertions, 132 deletions

diff --git a/apps/ChangeLog.txt b/apps/ChangeLog.txt
index 0c4e94fd9..cd1b4eb53 100644
--- a/apps/ChangeLog.txt
+++ b/apps/ChangeLog.txt
@@ -400,3 +400,9 @@
 	* apps/netutils/webclient, apps/netutils.codes, and apps/examples/wgetjson:
 	  Add support for wget POST interface.  Contributed by Darcy Gong.
 	* apps/examples/relays:  A relay example contributed by Darcy Gong.
+	* apps/nshlib/nsh_netcmds: Add ifup and ifdown commands (from Darcy
+	  Gong).
+	* apps/nshlib/nsh_netcmds: Extend the ifconfig command so that it
+	  supports setting IP addresses, network masks, name server addresses,
+	  and hardware address (from Darcy Gong).
+
diff --git a/apps/include/netutils/uiplib.h b/apps/include/netutils/uiplib.h
index b99417362..8e66fb970 100644
--- a/apps/include/netutils/uiplib.h
+++ b/apps/include/netutils/uiplib.h
@@ -102,6 +102,7 @@ extern "C" {
  */
 
 EXTERN bool uiplib_ipaddrconv(const char *addrstr, uint8_t *addr);
+EXTERN bool uiplib_hwmacconv(const char *hwstr, uint8_t *hw);
 
 /* Get and set IP/MAC addresses (Ethernet L2 only) */
 
@@ -135,6 +136,10 @@ EXTERN int  uip_parsehttpurl(const char *url, uint16_t *port,
 EXTERN int uip_listenon(uint16_t portno);
 EXTERN void uip_server(uint16_t portno, pthread_startroutine_t handler, int stacksize);
 
+EXTERN int uip_getifstatus(const char *ifname, bool *status);
+EXTERN int uip_ifup(const char *ifname);
+EXTERN int uip_ifdown(const char *ifname);
+
 #undef EXTERN
 #ifdef __cplusplus
 }
diff --git a/apps/netutils/uiplib/Makefile b/apps/netutils/uiplib/Makefile
index 189b32acc..c1b128c26 100644
--- a/apps/netutils/uiplib/Makefile
+++ b/apps/netutils/uiplib/Makefile
@@ -41,7 +41,8 @@ include $(APPDIR)/Make.defs
 
 ASRCS		=
 CSRCS		= uiplib.c uip_sethostaddr.c uip_gethostaddr.c uip_setdraddr.c \
-			  uip_setnetmask.c uip_parsehttpurl.c
+		  uip_setnetmask.c uip_parsehttpurl.c uip_setifflag.c \
+		  uip_getifflag.c
 
 # These require TCP support
 
diff --git a/apps/netutils/uiplib/uip_gethostaddr.c b/apps/netutils/uiplib/uip_gethostaddr.c
index c5c70b1be..0b2b5dd28 100644
--- a/apps/netutils/uiplib/uip_gethostaddr.c
+++ b/apps/netutils/uiplib/uip_gethostaddr.c
@@ -45,6 +45,7 @@
 
 #include <string.h>
 #include <errno.h>
+#include <unistd.h>
 
 #include <netinet/in.h>
 #include <net/if.h>
@@ -97,6 +98,7 @@ int uip_gethostaddr(const char *ifname, struct in_addr *addr)
               memcpy(addr, &req.ifr_addr, sizeof(struct in_addr));
 #endif
             }
+          close(sockfd);
         }
     }
   return ret;
diff --git a/apps/netutils/uiplib/uip_getifflag.c b/apps/netutils/uiplib/uip_getifflag.c
new file mode 100644
index 000000000..8574d331a
--- /dev/null
+++ b/apps/netutils/uiplib/uip_getifflag.c
@@ -0,0 +1,118 @@
+/****************************************************************************
+ * netutils/uiplib/uip_getifflag.c
+ *
+ *   Copyright (C) 2007-2009, 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>
+#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0
+
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include <netinet/in.h>
+#include <net/if.h>
+
+#include <apps/netutils/uiplib.h>
+
+/****************************************************************************
+ * Global Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: uip_getifstatus
+ *
+ * Description:
+ *   Get the network driver ifup/ifdown status
+ *
+ * Parameters:
+ *   ifname   The name of the interface to use
+ *   status   interface flag ifup or ifdown status
+ *
+ * Return:
+ *   0 on sucess; -1 on failure
+ *
+ ****************************************************************************/
+
+int uip_getifstatus(const char *ifname, bool *status)
+{
+  int ret = ERROR;
+  if (ifname)
+    {
+      /* Get a socket (only so that we get access to the INET subsystem) */
+
+      int sockfd = socket(PF_INET, UIPLIB_SOCK_IOCTL, 0);
+      if (sockfd >= 0)
+        {
+          struct ifreq req;
+          memset (&req, 0, sizeof(struct ifreq));
+
+          /* Put the driver name into the request */
+
+          strncpy(req.ifr_name, ifname, IFNAMSIZ);
+
+          /* Perform the ioctl to ifup or ifdown status */
+
+          ret = ioctl(sockfd, SIOCGIFFLAGS, (unsigned long)&req);
+          if (!ret)
+            {
+              /* Return the ifup or ifdown status */
+
+              if ((req.ifr_flags & IF_FLAG_IFUP) == (req.ifr_flags & IF_FLAG_IFDOWN))
+                {
+                  ret = ERROR;
+                }
+              else if(req.ifr_flags & IF_FLAG_IFUP)
+                {
+                  *status = true;
+                }
+              else
+                {
+                  *status = false;
+                }
+            }
+          close(sockfd);
+        }
+    }
+  return ret;
+}
+
+#endif /* CONFIG_NET && CONFIG_NSOCKET_DESCRIPTORS */
diff --git a/apps/netutils/uiplib/uip_getmacaddr.c b/apps/netutils/uiplib/uip_getmacaddr.c
index f4f01a7f3..e0f72f4a7 100644
--- a/apps/netutils/uiplib/uip_getmacaddr.c
+++ b/apps/netutils/uiplib/uip_getmacaddr.c
@@ -44,6 +44,7 @@
 #include <sys/ioctl.h>
 #include <stdint.h>
 #include <string.h>
+#include <unistd.h>
 #include <errno.h>
 
 #include <netinet/in.h>
@@ -96,6 +97,7 @@ int uip_getmacaddr(const char *ifname, uint8_t *macaddr)
 
               memcpy(macaddr, &req.ifr_hwaddr.sa_data, IFHWADDRLEN);
             }
+          close(sockfd);
         }
     }
   return ret;
diff --git a/apps/netutils/uiplib/uip_setifflag.c b/apps/netutils/uiplib/uip_setifflag.c
new file mode 100644
index 000000000..317ddcce1
--- /dev/null
+++ b/apps/netutils/uiplib/uip_setifflag.c
@@ -0,0 +1,141 @@
+/****************************************************************************
+ * netutils/uiplib/uip_setifflag.c
+ *
+ *   Copyright (C) 2007-2009, 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>
+#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0
+
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include <netinet/in.h>
+#include <net/if.h>
+
+#include <apps/netutils/uiplib.h>
+
+/****************************************************************************
+ * Global Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: uip_ifup
+ *
+ * Description:
+ *   Set the network interface UP
+ *
+ * Parameters:
+ *   ifname   The name of the interface to use
+ *
+ * Return:
+ *   0 on sucess; -1 on failure
+ *
+ ****************************************************************************/
+
+int uip_ifup(const char *ifname)
+{
+  int ret = ERROR;
+  if (ifname)
+    {
+      /* Get a socket (only so that we get access to the INET subsystem) */
+
+      int sockfd = socket(PF_INET, UIPLIB_SOCK_IOCTL, 0);
+      if (sockfd >= 0)
+        {
+          struct ifreq req;
+          memset (&req, 0, sizeof(struct ifreq));
+
+          /* Put the driver name into the request */
+
+          strncpy(req.ifr_name, ifname, IFNAMSIZ);
+
+          /* Perform the ioctl to ifup flag */
+          req.ifr_flags |= IF_FLAG_IFUP;
+
+          ret = ioctl(sockfd, SIOCSIFFLAGS, (unsigned long)&req);
+          close(sockfd);
+        }
+    }
+  return ret;
+}
+
+/****************************************************************************
+ * Name: uip_ifdown
+ *
+ * Description:
+ *   Set the network interface DOWN
+ *
+ * Parameters:
+ *   ifname   The name of the interface to use
+ *
+ * Return:
+ *   0 on sucess; -1 on failure
+ *
+ ****************************************************************************/
+
+int uip_ifdown(const char *ifname)
+{
+  int ret = ERROR;
+  if (ifname)
+    {
+      /* Get a socket (only so that we get access to the INET subsystem) */
+
+      int sockfd = socket(PF_INET, UIPLIB_SOCK_IOCTL, 0);
+      if (sockfd >= 0)
+        {
+          struct ifreq req;
+          memset (&req, 0, sizeof(struct ifreq));
+
+          /* Put the driver name into the request */
+
+          strncpy(req.ifr_name, ifname, IFNAMSIZ);
+
+          /* Perform the ioctl to ifup flag */
+          req.ifr_flags |= IF_FLAG_IFDOWN;
+
+          ret = ioctl(sockfd, SIOCSIFFLAGS, (unsigned long)&req);
+          close(sockfd);
+        }
+    }
+  return ret;
+}
+
+#endif /* CONFIG_NET && CONFIG_NSOCKET_DESCRIPTORS */
diff --git a/apps/netutils/uiplib/uiplib.c b/apps/netutils/uiplib/uiplib.c
index f863b7343..32ffaeb06 100644
--- a/apps/netutils/uiplib/uiplib.c
+++ b/apps/netutils/uiplib/uiplib.c
@@ -45,10 +45,12 @@
 
 #include <stdint.h>
 #include <stdbool.h>
+#include <debug.h>
 
 #include <nuttx/net/uip/uip.h>
 #include <apps/netutils/uiplib.h>
 
+
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
@@ -93,3 +95,58 @@ bool uiplib_ipaddrconv(const char *addrstr, uint8_t *ipaddr)
     }
   return true;
 }
+
+bool uiplib_hwmacconv(const char *hwstr, uint8_t *hw)
+{
+  unsigned char tmp;
+  char c;
+  unsigned char i;
+  unsigned char j;
+
+  if (strlen(hwstr)!=17)
+    {
+      return false;
+    }
+
+  tmp = 0;
+
+  for (i = 0; i < 6; ++i)
+    {
+      j = 0;
+      do
+        {
+          c = *hwstr;
+          ++j;
+          if (j > 3)
+           {
+             return false;
+           }
+          if (c == ':' || c == 0)
+            {
+              *hw = tmp;
+              nvdbg("HWMAC[%d]%0.2X\n",i,tmp);
+              ++hw;
+              tmp = 0;
+            }
+          else if(c >= '0' && c <= '9')
+            {
+              tmp = (tmp << 4) + (c - '0');
+            }
+          else if(c >= 'a' && c <= 'f')
+            {
+              tmp = (tmp << 4) + (c - 'a' + 10);
+            }
+          else if(c >= 'A' && c <= 'F')
+            {
+              tmp = (tmp << 4) + (c - 'A' + 10);
+            }
+          else
+            {
+              return false;
+            }
+          ++hwstr;
+        }
+      while(c != ':' && c != 0);
+    }
+  return true;
+}
diff --git a/apps/netutils/webclient/webclient.c b/apps/netutils/webclient/webclient.c
index 4dbd130ec..2604ce020 100644
--- a/apps/netutils/webclient/webclient.c
+++ b/apps/netutils/webclient/webclient.c
@@ -56,6 +56,7 @@
 
 #include <sys/socket.h>
 #include <stdint.h>
+#include <stdio.h>
 #include <stdbool.h>
 #include <unistd.h>
 #include <string.h>
diff --git a/apps/nshlib/README.txt b/apps/nshlib/README.txt
index 9f371678e..227f01c0a 100644
--- a/apps/nshlib/README.txt
+++ b/apps/nshlib/README.txt
@@ -385,7 +385,7 @@ o help [-v] [<cmd>]
   <cmd>
     Show full command usage only for this command
 
-o ifconfig
+o ifconfig [nic_name [ip]] [dr|gw|gateway <dr-address>] [netmask <net-mask>] [dns <dns-address>] [hw <hw-mac>]
 
   Show the current configuration of the network, for example:
 
@@ -396,6 +396,22 @@ o ifconfig
   if uIP statistics are enabled (CONFIG_NET_STATISTICS), then
   this command will also show the detailed state of uIP.
 
+o ifdown <nic-name>
+
+  Take down the interface identified by the name <nic-name>.
+
+  Example:
+
+    ifdown eth0
+
+o ifup <nic-name>
+
+  Bring up down the interface identified by the name <nic-name>.
+
+  Example:
+
+    ifup eth0
+
 o kill -<signal> <pid>
 
   Send the <signal> to the task identified by <pid>.
@@ -850,6 +866,8 @@ Command Dependencies on Configuration Settings
   get        CONFIG_NET && CONFIG_NET_UDP && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NET_BUFSIZE >= 558  (see note 1)
   help       --
   ifconfig   CONFIG_NET
+  ifdown     CONFIG_NET
+  ifup       CONFIG_NET
   kill       !CONFIG_DISABLE_SIGNALS
   losetup    !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0
   ls         CONFIG_NFILE_DESCRIPTORS > 0
@@ -899,17 +917,18 @@ also allow it to squeeze into very small memory footprints.
   CONFIG_NSH_DISABLE_CD,        CONFIG_NSH_DISABLE_CP,        CONFIG_NSH_DISABLE_DD,
   CONFIG_NSH_DISABLE_DF,        CONFIG_NSH_DISABLE_ECHO,      CONFIG_NSH_DISABLE_EXEC,
   CONFIG_NSH_DISABLE_EXIT,      CONFIG_NSH_DISABLE_FREE,      CONFIG_NSH_DISABLE_GET,
-  CONFIG_NSH_DISABLE_HELP,      CONFIG_NSH_DISABLE_IFCONFIG,  CONFIG_NSH_DISABLE_KILL,
-  CONFIG_NSH_DISABLE_LOSETUP,   CONFIG_NSH_DISABLE_LS,        CONFIG_NSH_DISABLE_MD5
-  CONFIG_NSH_DISABLE_MB,        CONFIG_NSH_DISABLE_MKDIR,     CONFIG_NSH_DISABLE_MKFATFS,
-  CONFIG_NSH_DISABLE_MKFIFO,    CONFIG_NSH_DISABLE_MKRD,      CONFIG_NSH_DISABLE_MH,
-  CONFIG_NSH_DISABLE_MOUNT,     CONFIG_NSH_DISABLE_MW,        CONFIG_NSH_DISABLE_MV,
-  CONFIG_NSH_DISABLE_NFSMOUNT,  CONFIG_NSH_DISABLE_PS,        CONFIG_NSH_DISABLE_PING,
-  CONFIG_NSH_DISABLE_PUT,       CONFIG_NSH_DISABLE_PWD,       CONFIG_NSH_DISABLE_RM,
-  CONFIG_NSH_DISABLE_RMDIR,     CONFIG_NSH_DISABLE_SET,       CONFIG_NSH_DISABLE_SH,
-  CONFIG_NSH_DISABLE_SLEEP,     CONFIG_NSH_DISABLE_TEST,      CONFIG_NSH_DISABLE_UMOUNT,
-  CONFIG_NSH_DISABLE_UNSET,     CONFIG_NSH_DISABLE_URLDECODE, CONFIG_NSH_DISABLE_URLENCODE,
-  CONFIG_NSH_DISABLE_USLEEP,    CONFIG_NSH_DISABLE_WGET,      CONFIG_NSH_DISABLE_XD
+  CONFIG_NSH_DISABLE_HELP,      CONFIG_NSH_DISABLE_IFCONFIG,  CONFIG_NSH_DISABLE_IFUPDOWN,
+  CONFIG_NSH_DISABLE_KILL,      CONFIG_NSH_DISABLE_LOSETUP,   CONFIG_NSH_DISABLE_LS,
+  CONFIG_NSH_DISABLE_MD5        CONFIG_NSH_DISABLE_MB,        CONFIG_NSH_DISABLE_MKDIR,
+  CONFIG_NSH_DISABLE_MKFATFS,   CONFIG_NSH_DISABLE_MKFIFO,    CONFIG_NSH_DISABLE_MKRD,
+  CONFIG_NSH_DISABLE_MH,        CONFIG_NSH_DISABLE_MOUNT,     CONFIG_NSH_DISABLE_MW,
+  CONFIG_NSH_DISABLE_MV,        CONFIG_NSH_DISABLE_NFSMOUNT,  CONFIG_NSH_DISABLE_PS,
+  CONFIG_NSH_DISABLE_PING,      CONFIG_NSH_DISABLE_PUT,       CONFIG_NSH_DISABLE_PWD,
+  CONFIG_NSH_DISABLE_RM,        CONFIG_NSH_DISABLE_RMDIR,     CONFIG_NSH_DISABLE_SET,
+  CONFIG_NSH_DISABLE_SH,        CONFIG_NSH_DISABLE_SLEEP,     CONFIG_NSH_DISABLE_TEST,
+  CONFIG_NSH_DISABLE_UMOUNT,    CONFIG_NSH_DISABLE_UNSET,     CONFIG_NSH_DISABLE_URLDECODE,
+  CONFIG_NSH_DISABLE_URLENCODE, CONFIG_NSH_DISABLE_USLEEP,    CONFIG_NSH_DISABLE_WGET,
+  CONFIG_NSH_DISABLE_XD
 
 Verbose help output can be suppressed by defining CONFIG_NSH_HELP_TERSE.  In that
 case, the help command is still available but will be slightly smaller.
diff --git a/apps/nshlib/nsh.h b/apps/nshlib/nsh.h
index 9f36b1d1f..ac75cf2e1 100644
--- a/apps/nshlib/nsh.h
+++ b/apps/nshlib/nsh.h
@@ -267,9 +267,35 @@
 #  undef CONFIG_NSH_ROMFSSECTSIZE
 #endif
 
-/* This is the maximum number of arguments that will be accepted for a command */
+/* This is the maximum number of arguments that will be accepted for a
+ * command.  Here we attempt to select the smallest number possible depending
+ * upon the of commands that are available.  Most commands use six or fewer
+ * arguments, but there are a few that require more.
+ *
+ * This value is also configurable with CONFIG_NSH_MAXARGUMENTS.  This
+ * configurability is necessary since there may also be external, "built-in"
+ * commands that require more commands than NSH is aware of.
+ */
+
+#ifndef CONFIG_NSH_MAXARGUMENTS
+#  define CONFIG_NSH_MAXARGUMENTS 6
+#endif
+
+#if CONFIG_NSH_MAXARGUMENTS < 11
+#  if defined(CONFIG_NET) && !defined(CONFIG_NSH_DISABLE_IFCONFIG)
+#    undef CONFIG_NSH_MAXARGUMENTS
+#    define CONFIG_NSH_MAXARGUMENTS 11
+#  endif
+#endif
 
-#define NSH_MAX_ARGUMENTS 6
+#if CONFIG_NSH_MAXARGUMENTS < 7
+#  if defined(CONFIG_NET_UDP) && CONFIG_NFILE_DESCRIPTORS > 0
+#    if !defined(CONFIG_NSH_DISABLE_GET) || !defined(CONFIG_NSH_DISABLE_PUT)
+#      undef CONFIG_NSH_MAXARGUMENTS
+#      define CONFIG_NSH_MAXARGUMENTS 7
+#    endif
+# endif
+#endif
 
 /* strerror() produces much nicer output but is, however, quite large and
  * will only be used if CONFIG_NSH_STRERROR is defined.  Note that the strerror
@@ -602,6 +628,10 @@ void nsh_usbtrace(void);
 #  ifndef CONFIG_NSH_DISABLE_IFCONFIG
       int cmd_ifconfig(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
 #  endif
+#  ifndef CONFIG_NSH_DISABLE_IFUPDOWN
+      int cmd_ifup(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
+      int cmd_ifdown(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
+#  endif
 #if defined(CONFIG_NET_UDP) && CONFIG_NFILE_DESCRIPTORS > 0
 #  ifndef CONFIG_NSH_DISABLE_GET
       int cmd_get(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
diff --git a/apps/nshlib/nsh_netcmds.c b/apps/nshlib/nsh_netcmds.c
index f3457a809..d28fe873d 100644
--- a/apps/nshlib/nsh_netcmds.c
+++ b/apps/nshlib/nsh_netcmds.c
@@ -277,14 +277,34 @@ int ifconfig_callback(FAR struct uip_driver_s *dev, void *arg)
 {
   struct nsh_vtbl_s *vtbl = (struct nsh_vtbl_s*)arg;
   struct in_addr addr;
+  bool is_running = false;
+  int ret;
+
+  ret = uip_getifstatus(dev->d_ifname,&is_running);
+  if (ret != OK)
+    {
+      nsh_output(vtbl, "\tGet %s interface flags error: %d\n",
+                 dev->d_ifname, ret);
+    }
+
+  nsh_output(vtbl, "%s\tHWaddr %s at %s\n",
+             dev->d_ifname, ether_ntoa(&dev->d_mac), (is_running)?"UP":"DOWN");
 
-  nsh_output(vtbl, "%s\tHWaddr %s\n", dev->d_ifname, ether_ntoa(&dev->d_mac));
   addr.s_addr = dev->d_ipaddr;
   nsh_output(vtbl, "\tIPaddr:%s ", inet_ntoa(addr));
+
   addr.s_addr = dev->d_draddr;
   nsh_output(vtbl, "DRaddr:%s ", inet_ntoa(addr));
+
   addr.s_addr = dev->d_netmask;
-  nsh_output(vtbl, "Mask:%s\n\n", inet_ntoa(addr));
+  nsh_output(vtbl, "Mask:%s\n", inet_ntoa(addr));
+
+#if defined(CONFIG_NSH_DHCPC) || defined(CONFIG_NSH_DNS)
+  resolv_getserver(&addr);
+  nsh_output(vtbl, "\tDNSaddr:%s\n", inet_ntoa(addr));
+#endif
+
+  nsh_output(vtbl, "\n");
   return OK;
 }
 
@@ -484,6 +504,54 @@ int cmd_get(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
 #endif
 
 /****************************************************************************
+ * Name: cmd_ifup
+ ****************************************************************************/
+
+#ifndef CONFIG_NSH_DISABLE_IFUPDOWN
+int cmd_ifup(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
+{
+  FAR char *intf = NULL;
+  int ret;
+
+  if (argc != 2)
+    {
+      nsh_output(vtbl, "Please select nic_name:\n");
+      netdev_foreach(ifconfig_callback, vtbl);
+      return OK;
+    }
+
+  intf = argv[1];
+  ret  = uip_ifup(intf);
+  nsh_output(vtbl, "ifup %s...%s\n", intf, (ret == OK) ? "OK" : "Failed");
+  return ret;
+}
+#endif
+
+/****************************************************************************
+ * Name: cmd_ifdown
+ ****************************************************************************/
+
+#ifndef CONFIG_NSH_DISABLE_IFUPDOWN
+int cmd_ifdown(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
+{
+  FAR char *intf = NULL;
+  int ret;
+
+  if (argc != 2)
+    {
+      nsh_output(vtbl, "Please select nic_name:\n");
+      netdev_foreach(ifconfig_callback, vtbl);
+      return OK;
+    }
+
+  intf = argv[1];
+  ret = uip_ifdown(intf);
+  nsh_output(vtbl, "ifdown %s...%s\n", intf, (ret == OK) ? "OK" : "Failed");
+  return ret;
+}
+#endif
+
+/****************************************************************************
  * Name: cmd_ifconfig
  ****************************************************************************/
 
@@ -491,7 +559,17 @@ int cmd_get(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
 int cmd_ifconfig(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
 {
   struct in_addr addr;
-  in_addr_t ip;
+  in_addr_t gip;
+  int i;
+  FAR char *intf = NULL;
+  FAR char *hostip = NULL;
+  FAR char *gwip = NULL;
+  FAR char *mask = NULL;
+  FAR char *tmp = NULL;
+  FAR char *hw = NULL;
+  FAR char *dns = NULL;
+  bool badarg=false;
+  uint8_t mac[6];
 
   /* With one or no arguments, ifconfig simply shows the status of ethernet
    * device:
@@ -513,24 +591,142 @@ int cmd_ifconfig(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
    *    ifconfig nic_name ip_address
    */
 
+  if (argc > 2)
+    {
+      for(i = 0; i < argc; i++)
+        {
+          if (i == 1)
+            {
+              intf = argv[i];
+            }
+          else if (i == 2)
+            {
+              hostip = argv[i];
+            }
+          else
+            {
+              tmp = argv[i];
+              if (!strcmp(tmp, "dr") || !strcmp(tmp, "gw") || !strcmp(tmp, "gateway"))
+                {
+                  if (argc-1 >= i+1)
+                    {
+                      gwip = argv[i+1];
+                      i++;
+                    }
+                  else
+                    {
+                      badarg = true;
+                    }
+                }
+              else if(!strcmp(tmp, "netmask"))
+                {
+                  if (argc-1 >= i+1)
+                    {
+                      mask = argv[i+1];
+                      i++;
+                    }
+                  else
+                    {
+                      badarg = true;
+                    }
+                }
+              else if(!strcmp(tmp, "hw"))
+                {
+                  if (argc-1>=i+1)
+                    {
+                      hw = argv[i+1];
+                      i++;
+                      badarg = !uiplib_hwmacconv(hw, mac);
+                    }
+                  else
+                    {
+                      badarg = true;
+                    }
+                }
+              else if(!strcmp(tmp, "dns"))
+                {
+                  if (argc-1 >= i+1)
+                    {
+                      dns = argv[i+1];
+                      i++;
+                    }
+                  else
+                    {
+                      badarg = true;
+                    }
+                }
+            }
+        }
+    }
+
+  if (badarg)
+    {
+      nsh_output(vtbl, g_fmtargrequired, argv[0]);
+      return ERROR;
+    }
+
+  /* Set Hardware ethernet MAC addr */
+
+  if (hw)
+    {
+      ndbg("HW MAC: %s\n", hw);
+      uip_setmacaddr(intf, mac);
+    }
+
   /* Set host ip address */
 
-  ip = addr.s_addr = inet_addr(argv[2]);
-  uip_sethostaddr(argv[1], &addr);
+  ndbg("Host IP: %s\n", hostip);
+  gip = addr.s_addr = inet_addr(hostip);
+  uip_sethostaddr(intf, &addr);
 
   /* Set gateway */
 
-  ip = NTOHL(ip);
-  ip &= ~0x000000ff;
-  ip |= 0x00000001;
+  if (gwip)
+    {
+      ndbg("Gateway: %s\n", gwip);
+      gip = addr.s_addr = inet_addr(gwip);
+    }
+  else
+    {
+      ndbg("Gateway: default\n");
+      gip  = NTOHL(gip);
+      gip &= ~0x000000ff;
+      gip |= 0x00000001;
+      gip  = HTONL(gip);
+      addr.s_addr = gip;
+    }
+
+  uip_setdraddr(intf, &addr);
+
+  /* Set network mask */
+
+  if (mask)
+    {
+      ndbg("Netmask: %s\n",mask);
+      addr.s_addr = inet_addr(mask);
+    }
+  else
+    {
+      ndbg("Netmask: Default\n");
+      addr.s_addr = inet_addr("255.255.255.0");
+    }
 
-  addr.s_addr = HTONL(ip);
-  uip_setdraddr(argv[1], &addr);
+  uip_setnetmask(intf, &addr);
 
-  /* Set netmask */
+#if defined(CONFIG_NSH_DHCPC) || defined(CONFIG_NSH_DNS)
+  if (dns)
+    {
+      ndbg("DNS: %s\n", dns);
+      addr.s_addr = inet_addr(dns);
+    }
+  else
+    {
+      ndbg("DNS: Default\n");
+      addr.s_addr = gip;
+    }
 
-  addr.s_addr = inet_addr("255.255.255.0");
-  uip_setnetmask(argv[1], &addr);
+  resolv_conf(&addr);
+#endif
 
   return OK;
 }
diff --git a/apps/nshlib/nsh_parse.c b/apps/nshlib/nsh_parse.c
index f9642809f..bf2b8a4a4 100644
--- a/apps/nshlib/nsh_parse.c
+++ b/apps/nshlib/nsh_parse.c
@@ -73,19 +73,19 @@
 /* Argument list size
  *
  *   argv[0]:      The command name. 
- *   argv[1]:      The beginning of argument (up to NSH_MAX_ARGUMENTS)
+ *   argv[1]:      The beginning of argument (up to CONFIG_NSH_MAXARGUMENTS)
  *   argv[argc-3]: Possibly '>' or '>>'
  *   argv[argc-2]: Possibly <file>
  *   argv[argc-1]: Possibly '&' (if pthreads are enabled)
  *   argv[argc]:   NULL terminating pointer
  *
- * Maximum size is NSH_MAX_ARGUMENTS+5
+ * Maximum size is CONFIG_NSH_MAXARGUMENTS+5
  */
 
 #ifndef CONFIG_NSH_DISABLEBG
-#  define MAX_ARGV_ENTRIES (NSH_MAX_ARGUMENTS+5)
+#  define MAX_ARGV_ENTRIES (CONFIG_NSH_MAXARGUMENTS+5)
 #else
-#  define MAX_ARGV_ENTRIES (NSH_MAX_ARGUMENTS+4)
+#  define MAX_ARGV_ENTRIES (CONFIG_NSH_MAXARGUMENTS+4)
 #endif
 
 /* Help command summary layout */
@@ -146,7 +146,7 @@ static const char g_failure[]    = "1";
 static const struct cmdmap_s g_cmdmap[] =
 {
 #if !defined(CONFIG_NSH_DISABLESCRIPT) && !defined(CONFIG_NSH_DISABLE_TEST)
-  { "[",        cmd_lbracket, 4, NSH_MAX_ARGUMENTS, "<expression> ]" },
+  { "[",        cmd_lbracket, 4, CONFIG_NSH_MAXARGUMENTS, "<expression> ]" },
 #endif
 
 #ifndef CONFIG_NSH_DISABLE_HELP
@@ -164,7 +164,7 @@ static const struct cmdmap_s g_cmdmap[] =
 
 #if CONFIG_NFILE_DESCRIPTORS > 0
 # ifndef CONFIG_NSH_DISABLE_CAT
-  { "cat",      cmd_cat,      2, NSH_MAX_ARGUMENTS, "<path> [<path> [<path> ...]]" },
+  { "cat",      cmd_cat,      2, CONFIG_NSH_MAXARGUMENTS, "<path> [<path> [<path> ...]]" },
 # endif
 #ifndef CONFIG_DISABLE_ENVIRON
 # ifndef CONFIG_NSH_DISABLE_CD
@@ -196,9 +196,9 @@ static const struct cmdmap_s g_cmdmap[] =
 
 #ifndef CONFIG_NSH_DISABLE_ECHO
 # ifndef CONFIG_DISABLE_ENVIRON
-  { "echo",     cmd_echo,     0, NSH_MAX_ARGUMENTS, "[<string|$name> [<string|$name>...]]" },
+  { "echo",     cmd_echo,     0, CONFIG_NSH_MAXARGUMENTS, "[<string|$name> [<string|$name>...]]" },
 # else
-  { "echo",     cmd_echo,     0, NSH_MAX_ARGUMENTS, "[<string> [<string>...]]" },
+  { "echo",     cmd_echo,     0, CONFIG_NSH_MAXARGUMENTS, "[<string> [<string>...]]" },
 # endif
 #endif
 
@@ -229,7 +229,11 @@ static const struct cmdmap_s g_cmdmap[] =
 
 #ifdef CONFIG_NET
 # ifndef CONFIG_NSH_DISABLE_IFCONFIG
-  { "ifconfig", cmd_ifconfig, 1, 3, "[nic_name [ip]]" },
+  { "ifconfig", cmd_ifconfig, 1, 11, "[nic_name [ip]] [dr|gw|gateway <dr-address>] [netmask <net-mask>] [dns <dns-address>] [hw <hw-mac>]" },
+# endif
+# ifndef CONFIG_NSH_DISABLE_IFUPDOWN
+  { "ifdown",   cmd_ifdown,   2, 2,  "<nic_name>" },
+  { "ifup",     cmd_ifup,     2, 2,  "<nic_name>" },
 # endif
 #endif
 
@@ -363,7 +367,7 @@ static const struct cmdmap_s g_cmdmap[] =
 #endif
 
 #if !defined(CONFIG_NSH_DISABLESCRIPT) && !defined(CONFIG_NSH_DISABLE_TEST)
-  { "test",     cmd_test,     3, NSH_MAX_ARGUMENTS, "<expression>" },
+  { "test",     cmd_test,     3, CONFIG_NSH_MAXARGUMENTS, "<expression>" },
 #endif
 
 #if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_FS_READABLE)
@@ -736,7 +740,7 @@ static int nsh_execute(FAR struct nsh_vtbl_s *vtbl, int argc, char *argv[])
    *
    * argv[0]:      The command name.  This is argv[0] when the arguments
    *               are, finally, received by the command vtblr
-   * argv[1]:      The beginning of argument (up to NSH_MAX_ARGUMENTS)
+   * argv[1]:      The beginning of argument (up to CONFIG_NSH_MAXARGUMENTS)
    * argv[argc]:   NULL terminating pointer
    */
 
@@ -1343,13 +1347,13 @@ int nsh_parse(FAR struct nsh_vtbl_s *vtbl, char *cmdline)
    * of argv is:
    *
    *   argv[0]:      The command name. 
-   *   argv[1]:      The beginning of argument (up to NSH_MAX_ARGUMENTS)
+   *   argv[1]:      The beginning of argument (up to CONFIG_NSH_MAXARGUMENTS)
    *   argv[argc-3]: Possibly '>' or '>>'
    *   argv[argc-2]: Possibly <file>
    *   argv[argc-1]: Possibly '&'
    *   argv[argc]:   NULL terminating pointer
    *
-   * Maximum size is NSH_MAX_ARGUMENTS+5
+   * Maximum size is CONFIG_NSH_MAXARGUMENTS+5
    */
 
   argv[0] = cmd;
@@ -1423,7 +1427,7 @@ int nsh_parse(FAR struct nsh_vtbl_s *vtbl, char *cmdline)
 
   /* Check if the maximum number of arguments was exceeded */
 
-  if (argc > NSH_MAX_ARGUMENTS)
+  if (argc > CONFIG_NSH_MAXARGUMENTS)
     {
       nsh_output(vtbl, g_fmttoomanyargs, cmd);
     }
diff --git a/nuttx/ChangeLog b/nuttx/ChangeLog
index 3b60fc812..f4bdc7ed0 100644
--- a/nuttx/ChangeLog
+++ b/nuttx/ChangeLog
@@ -3564,4 +3564,6 @@
 	* RGMP 4.0 updated from Qiany Yu.
 	* configs/*/Make.defs and configs/*/ld.script:  Massive clean-up
 	  and standardization of linker scripts from Freddie Chopin.
+	* net/netdev_ioctl.c:  Add interface state flags and ioctl calls
+	  to bring network interfaces up and down (from Darcy Gong).
 
diff --git a/nuttx/Documentation/NuttShell.html b/nuttx/Documentation/NuttShell.html
index f8ef41fb9..31546a100 100644
--- a/nuttx/Documentation/NuttShell.html
+++ b/nuttx/Documentation/NuttShell.html
@@ -8,7 +8,7 @@
   <tr align="center" bgcolor="#e4e4e4">
     <td>
       <h1><big><font color="#3c34ec"><i>NuttShell (NSH)</i></font></big></h1>
-      <p>Last Updated: October 31, 2012</p>
+      <p>Last Updated: November 4, 2012</p>
     </td>
   </tr>
 </table>
@@ -173,175 +173,187 @@
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdifconfig">2.16 Show Network Configuration (ifconfig)</a>
+    <a href="#cmdifconfig">2.16 Manage Network Configuration (ifconfig)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdkill">2.17 Send a signal to a task (kill)</a>
+    <a href="#cmdifdown">2.17 Take a network down (ifdown)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdlosetup">2.18 Setup/teardown the Loop Device (losetup)</a>
+    <a href="#cmdifup">2.18 Bring a network up (ifup)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdls">2.19 List Directory Contents (ls)</a>
+    <a href="#cmdkill">2.19 Send a signal to a task (kill)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdmd5">2.20 Calculate MD5 (md5)</a>
+    <a href="#cmdlosetup">2.20 Setup/teardown the Loop Device (losetup)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdmbhw">2.21 Access Memory (mb, mh, and mw)</a>
+    <a href="#cmdls">2.21 List Directory Contents (ls)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdps">2.22 Show Current Tasks and Threads (ps)</a>
+    <a href="#cmdmd5">2.22 Calculate MD5 (md5)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdmkdir">2.23 Create a Directory (mkdir)</a>
+    <a href="#cmdmbhw">2.23 Access Memory (mb, mh, and mw)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdmkfatfs">2.24 Create a FAT Filesystem (mkfatfs)</a>
+    <a href="#cmdps">2.24 Show Current Tasks and Threads (ps)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdmkfifo">2.25 Create a FIFO (mkfifo)</a>
+    <a href="#cmdmkdir">2.25 Create a Directory (mkdir)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdmkrd">2.26 Create a RAMDISK (mkrd)</a>
+    <a href="#cmdmkfatfs">2.26 Create a FAT Filesystem (mkfatfs)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdmount">2.27 Mount a File System (mount)</a>
+    <a href="#cmdmkfifo">2.27 Create a FIFO (mkfifo)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdmv">2.28 Rename a File (mv)</a>
+    <a href="#cmdmkrd">2.28 Create a RAMDISK (mkrd)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdnfsmount">2.29 Mount an NFS file system (nfsmount)</a>
+    <a href="#cmdmount">2.29 Mount a File System (mount)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdping">2.30 Check Network Peer (ping)</a>
+    <a href="#cmdmv">2.30 Rename a File (mv)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdput">2.31 Send File Via TFTP (put)</a>
+    <a href="#cmdnfsmount">2.31 Mount an NFS file system (nfsmount)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdpwd">2.32 Show Current Working Directory (pwd)</a>
+    <a href="#cmdping">2.32 Check Network Peer (ping)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdrm">2.33 Remove a File (rm)</a>
+    <a href="#cmdput">2.33 Send File Via TFTP (put)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdrmdir">2.34 Remove a Directory (rmdir)</a>
+    <a href="#cmdpwd">2.34 Show Current Working Directory (pwd)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdset">2.35 Set an Environment Variable (set)</a>
+    <a href="#cmdrm">2.35 Remove a File (rm)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdsh">2.36 Execute an NSH Script (sh)</a>
+    <a href="#cmdrmdir">2.36 Remove a Directory (rmdir)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdsleep">2.37 Wait for Seconds (sleep)</a>
+    <a href="#cmdset">2.37 Set an Environment Variable (set)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdunmount">2.38 Unmount a File System (umount)</a>
+    <a href="#cmdsh">2.38 Execute an NSH Script (sh)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdunset">2.39 Unset an Environment Variable (unset)</a>
+    <a href="#cmdsleep">2.39 Wait for Seconds (sleep)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdurldec">2.40 URL Decode (urldecode)</a>
+    <a href="#cmdunmount">2.40 Unmount a File System (umount)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdurlencode">2.41 URL Encode (urlencode)</a>
+    <a href="#cmdunset">2.41 Unset an Environment Variable (unset)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdusleep">2.42 Wait for Microseconds (usleep)</a>
+    <a href="#cmdurldec">2.42 URL Decode (urldecode)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdwget">2.43 Get File Via HTTP (wget)</a>
+    <a href="#cmdurlencode">2.43 URL Encode (urlencode)</a>
   </td>
 </tr>
 <tr>
   <td><br></td>
   <td>
-    <a href="#cmdxd">2.44 Hexadecimal Dump (xd)</a>
+    <a href="#cmdusleep">2.44 Wait for Microseconds (usleep)</a>
+  </td>
+</tr>
+<tr>
+  <td><br></td>
+  <td>
+    <a href="#cmdwget">2.45 Get File Via HTTP (wget)</a>
+  </td>
+</tr>
+<tr>
+  <td><br></td>
+  <td>
+    <a href="#cmdxd">2.46 Hexadecimal Dump (xd)</a>
   </td>
 </tr>
 <tr>
@@ -1170,18 +1182,18 @@ help [-v] [&lt;cmd&gt;]
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdifconfig"><h2>2.16 Show Network Configuration (ifconfig)</h2></a>
+    <a name="cmdifconfig"><h2>2.16 Manage Network Configuration (ifconfig)</h2></a>
   </td>
   </tr>
 </table>
 
 <p><b>Command Syntax:</b></p>
 <ul><pre>
-ifconfig [nic_name [ip_address]]
+ifconfig [nic_name [ip]] [dr|gw|gateway &lt;dr-address&gt;] [netmask &lt;net-mask&gt;] [dns &lt;dns-address&gt;] [hw &lt;hw-mac&gt;]]
 </pre></ul>
 <p>
   <b>Synopsis</b>.
-  Two forms of the <code>ifconfig</code>command are supported:
+  Multiple forms of the <code>ifconfig</code>command are supported:
 </p>
 <ol>
   <li>
@@ -1214,14 +1226,63 @@ eth0    HWaddr 00:18:11:80:10:06
     </p>
     <ul><pre>
 ifconfig nic_name ip_address
-</pre><ul>
+</pre></ul>
+  </li>
+  <li>
+    Other forms <i>to be provided</i>
   </li>
 </ol>
 
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdkill"><h2>2.17 Send a signal to a task (kill)</h2></a>
+    <a name="cmdifdown"><h2>2.17 Take a network down (ifdown)</h2></a>
+  </td>
+  </tr>
+</table>
+
+<p><b>Command Syntax:</b></p>
+<ul><pre>
+ifdown &lt;nic-name&gt;
+</pre></ul>
+<p>
+  <b>Synopsis</b>.
+  Take down the interface identified by the name &lt;nic-name&gt;.
+</p>
+<p>
+  <b>Example:</b>
+</p>
+<ul><pre>
+ifdown eth0
+</pre></ul>
+
+<table width ="100%">
+  <tr bgcolor="#e4e4e4">
+  <td>
+    <a name="cmdifup"><h2>2.18 Bring a network up (ifup)</h2></a>
+  </td>
+  </tr>
+</table>
+
+<p><b>Command Syntax:</b></p>
+<ul><pre>
+ifup &lt;nic-name&gt;
+</pre></ul>
+<p>
+  <b>Synopsis</b>.
+  Bring up down the interface identified by the name &lt;nic-name&gt;.
+</p>
+<p>
+  <b>Example:</b>
+</p>
+<ul><pre>
+ifup eth0
+</pre></ul>
+
+<table width ="100%">
+  <tr bgcolor="#e4e4e4">
+  <td>
+    <a name="cmdkill"><h2>2.19 Send a signal to a task (kill)</h2></a>
   </td>
   </tr>
 </table>
@@ -1262,7 +1323,7 @@ nsh&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdlosetup"><h2>2.18 Setup/teardown the Loop Device (losetup)</h2></a>
+    <a name="cmdlosetup"><h2>2.20 Setup/teardown the Loop Device (losetup)</h2></a>
   </td>
   </tr>
 </table>
@@ -1315,7 +1376,7 @@ losetup d &lt;dev-path&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdls"><h2>2.19 List Directory Contents (ls)</h2></a>
+    <a name="cmdls"><h2>2.21 List Directory Contents (ls)</h2></a>
   </td>
   </tr>
 </table>
@@ -1352,7 +1413,7 @@ ls [-lRs] &lt;dir-path&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdmd5"><h2>2.20 Calculate MD5 (md5)</h2></a>
+    <a name="cmdmd5"><h2>2.22 Calculate MD5 (md5)</h2></a>
   </td>
   </tr>
 </table>
@@ -1369,7 +1430,7 @@ md5 [-f] &lt;string or filepath&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdmbhw"><h2>2.21 Access Memory (mb, mh, and mw)</h2></a>
+    <a name="cmdmbhw"><h2>2.23 Access Memory (mb, mh, and mw)</h2></a>
   </td>
   </tr>
 </table>
@@ -1423,7 +1484,7 @@ nsh&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdps"><h2>2.22 Show Current Tasks and Threads (ps)</h2></a>
+    <a name="cmdps"><h2>2.24 Show Current Tasks and Threads (ps)</h2></a>
   </td>
   </tr>
 </table>
@@ -1449,7 +1510,7 @@ nsh&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdmkdir"><h2>2.23 Create a Directory (mkdir)</h2></a>
+    <a name="cmdmkdir"><h2>2.25 Create a Directory (mkdir)</h2></a>
   </td>
 </tr>
 </table>
@@ -1484,7 +1545,7 @@ nsh>
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdmkfatfs"><h2>2.24 Create a FAT Filesystem (mkfatfs)</h2></a>
+    <a name="cmdmkfatfs"><h2>2.26 Create a FAT Filesystem (mkfatfs)</h2></a>
   </td>
 </tr>
 </table>
@@ -1504,7 +1565,7 @@ mkfatfs &lt;path&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdmkfifo"><h2>2.25 Create a FIFO (mkfifo)</h2></a>
+    <a name="cmdmkfifo"><h2>2.27 Create a FIFO (mkfifo)</h2></a>
   </td>
 </tr>
 </table>
@@ -1542,7 +1603,7 @@ nsh>
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdmkrd"><h2>2.26 Create a RAMDISK (mkrd)</h2></a>
+    <a name="cmdmkrd"><h2>2.28 Create a RAMDISK (mkrd)</h2></a>
   </td>
 </tr>
 </table>
@@ -1593,7 +1654,7 @@ nsh&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdmount"><h2>2.27 Mount a File System (mount)</h2></a>
+    <a name="cmdmount"><h2>2.29 Mount a File System (mount)</h2></a>
   </td>
 </tr>
 </table>
@@ -1672,7 +1733,7 @@ nsh> mount
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdmv"><h2>2.28 Rename a File (mv)</h2></a>
+    <a name="cmdmv"><h2>2.30 Rename a File (mv)</h2></a>
   </td>
   </tr>
 </table>
@@ -1690,7 +1751,7 @@ mv &lt;old-path&gt; &lt;new-path&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdnfsmount"><h2>2.29 Mount an NFS file system (nfsmount)</h2></a>
+    <a name="cmdnfsmount"><h2>2.31 Mount an NFS file system (nfsmount)</h2></a>
   </td>
   </tr>
 </table>
@@ -1709,7 +1770,7 @@ nfsmount &lt;server-address&gt; &lt;mount-point&gt; &lt;remote-path&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdping"><h2>2.30 Check Network Peer (ping)</h2></a>
+    <a name="cmdping"><h2>2.32 Check Network Peer (ping)</h2></a>
   </td>
   </tr>
 </table>
@@ -1742,7 +1803,7 @@ nsh&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdput"><h2>2.31 Send File Via TFTP (put)</h2></a>
+    <a name="cmdput"><h2>2.33 Send File Via TFTP (put)</h2></a>
   </td>
   </tr>
 </table>
@@ -1777,7 +1838,7 @@ put [-b|-n] [-f &lt;remote-path&gt;] -h &lt;ip-address&gt; &lt;local-path&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdpwd"><h2>2.32 Show Current Working Directory (pwd)</h2></a>
+    <a name="cmdpwd"><h2>2.34 Show Current Working Directory (pwd)</h2></a>
   </td>
   </tr>
 </table>
@@ -1807,7 +1868,7 @@ nsh&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdrm"><h2>2.33 Remove a File (rm)</h2></a>
+    <a name="cmdrm"><h2>2.35 Remove a File (rm)</h2></a>
   </td>
 </tr>
 </table>
@@ -1841,7 +1902,7 @@ nsh>
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdrmdir"><h2>2.34 Remove a Directory (rmdir)</h2></a>
+    <a name="cmdrmdir"><h2>2.36 Remove a Directory (rmdir)</h2></a>
   </td>
 </tr>
 </table>
@@ -1876,7 +1937,7 @@ nsh>
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdset"><h2>2.35 Set an Environment Variable (set)</h2></a>
+    <a name="cmdset"><h2>2.37 Set an Environment Variable (set)</h2></a>
   </td>
   </tr>
 </table>
@@ -1902,7 +1963,7 @@ nsh&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdsh"><h2>2.36 Execute an NSH Script (sh)</h2></a>
+    <a name="cmdsh"><h2>2.38 Execute an NSH Script (sh)</h2></a>
   </td>
   </tr>
 </table>
@@ -1920,7 +1981,7 @@ sh &lt;script-path&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdsleep"><h2>2.37 Wait for Seconds (sleep)</h2></a>
+    <a name="cmdsleep"><h2>2.39 Wait for Seconds (sleep)</h2></a>
   </td>
   </tr>
 </table>
@@ -1937,7 +1998,7 @@ sleep &lt;sec&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdunmount"><h2>2.38 Unmount a File System (umount)</h2></a>
+    <a name="cmdunmount"><h2>2.40 Unmount a File System (umount)</h2></a>
   </td>
 </tr>
 </table>
@@ -1967,7 +2028,7 @@ nsh>
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdunset"><h2>2.39 Unset an Environment Variable (unset)</h2></a>
+    <a name="cmdunset"><h2>2.41 Unset an Environment Variable (unset)</h2></a>
   </td>
   </tr>
 </table>
@@ -1993,7 +2054,7 @@ nsh&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdurldec"><h2>2.40 URL Decode (urldecode)</h2></a>
+    <a name="cmdurldec"><h2>2.42 URL Decode (urldecode)</h2></a>
   </td>
   </tr>
 </table>
@@ -2010,7 +2071,7 @@ urldecode [-f] &lt;string or filepath&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdurlencode"><h2>2.41 URL Encode (urlencode)</h2></a>
+    <a name="cmdurlencode"><h2>2.43 URL Encode (urlencode)</h2></a>
   </td>
   </tr>
 </table>
@@ -2027,7 +2088,7 @@ urlencode [-f] &lt;string or filepath&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdusleep"><h2>2.42 Wait for Microseconds (usleep)</h2></a>
+    <a name="cmdusleep"><h2>2.44 Wait for Microseconds (usleep)</h2></a>
   </td>
   </tr>
 </table>
@@ -2044,7 +2105,7 @@ usleep &lt;usec&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdwget">2.43 Get File Via HTTP (wget)</a>
+    <a name="cmdwget">2.45 Get File Via HTTP (wget)</a>
   </td>
   </tr>
 </table>
@@ -2071,7 +2132,7 @@ wget [-o &lt;local-path&gt;] &lt;url&gt;
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
   <td>
-    <a name="cmdxd"><h2>2.44 Hexadecimal dump (xd)</h2></a>
+    <a name="cmdxd"><h2>2.46 Hexadecimal dump (xd)</h2></a>
   </td>
   </tr>
 </table>
@@ -2216,6 +2277,16 @@ nsh>
     <td><code>CONFIG_NSH_DISABLE_IFCONFIG</code></td>
   </tr>
   <tr>
+    <td><b><code>ifdown</code></b></td>
+    <td><code>CONFIG_NET</code></td>
+    <td><code>CONFIG_NSH_DISABLE_IFUPDOWN</code></td>
+  </tr>
+  <tr>
+    <td><b><code>ifup</code></b></td>
+    <td><code>CONFIG_NET</code></td>
+    <td><code>CONFIG_NSH_DISABLE_IFUPDOWN</code></td>
+  </tr>
+  <tr>
     <td><b><code>kill</code></b></td>
     <td>!<code>CONFIG_DISABLE_SIGNALS</code></td>
     <td><code>CONFIG_NSH_DISABLE_KILL</code></td>
@@ -3723,9 +3794,9 @@ mount -t vfat /dev/ram1 /tmp
   <li><a href="#startupscript"><code>/etc/init.d/rcS</code></a>
   <li><a href="#cmdexec"><code>exec</code></a></li>
   <li><a href="#custapps"><code>exec_namedapp()</code></a></li>
+  <li><a href="#cmdexit"><code>exit</code></a></li>
 </ul></td>
 <td></ul>
-  <li><a href="#cmdexit"><code>exit</code></a></li>
   <li><a href="#cmdfree"><code>free</code></a></li>
   <li><a href="#custoncmds"><code>g_cmdmap</code></a></li>
   <li><a href="#custinit"><code>genromfs</code></a></li>
@@ -3734,6 +3805,8 @@ mount -t vfat /dev/ram1 /tmp
   <li><a href="#cmdhelp"><code>help</code></a></li>
   <li><a href="#conditional"><code>if-then[-else]-fi</code></a></li>
   <li><a href="#cmdifconfig"><code>ifconfig</code></a></li>
+  <li><a href="#cmdifdown"><code>ifdown</code></a></li>
+  <li><a href="#cmdifup"><code>ifup</code></a></li>
   <li><a href="#custonshlib">Initialization sequence</a></li>
   <li><a href="#cmdkill"><code>kill</code></a></li>
   <li><a href="#cmdlosetup"><code>losetup</code></a></li>
diff --git a/nuttx/include/net/if.h b/nuttx/include/net/if.h
index e64b58563..1ff8ebc38 100644
--- a/nuttx/include/net/if.h
+++ b/nuttx/include/net/if.h
@@ -52,6 +52,10 @@
 #define IF_NAMESIZE     6   /* Newer naming standard */
 #define IFHWADDRLEN     6
 
+#define IFF_RUNNING     (1 << 0)
+#define IF_FLAG_IFUP    (1 << 0)
+#define IF_FLAG_IFDOWN  (2 << 0)
+
 /*******************************************************************************************
  * Public Type Definitions
  *******************************************************************************************/
@@ -72,6 +76,7 @@ struct lifreq
     struct sockaddr         lifru_hwaddr;             /* MAC address */
     int                     lifru_count;              /* Number of devices */
     int                     lifru_mtu;                /* MTU size */
+    uint8_t                 lifru_flags;              /* Interface flags */
   } lifr_ifru;
 };
 
@@ -82,6 +87,7 @@ struct lifreq
 #define lifr_hwaddr         lifr_ifru.lifru_hwaddr    /* MAC address */
 #define lifr_mtu            lifr_ifru.lifru_mtu       /* MTU */
 #define lifr_count          lifr_ifru.lifru_count     /* Number of devices */
+#define lifr_flags          lifr_ifru.lifru_flags     /* interface flags */
 
 /* This is the older I/F request that should only be used with IPv4.  However, since
  * NuttX only supports IPv4 or 6 (not both), we can force the older structure to
@@ -101,6 +107,7 @@ struct ifreq
     struct sockaddr         ifru_hwaddr;              /* MAC address */
     int                     ifru_count;               /* Number of devices */
     int                     ifru_mtu;                 /* MTU size */
+    uint8_t                 ifru_flags;               /* Interface flags */
   } ifr_ifru;
 };
 
@@ -111,6 +118,7 @@ struct ifreq
 #define ifr_hwaddr          ifr_ifru.ifru_hwaddr      /* MAC address */
 #define ifr_mtu             ifr_ifru.ifru_mtu         /* MTU */
 #define ifr_count           ifr_ifru.ifru_count       /* Number of devices */
+#define ifr_flags           ifr_ifru.ifru_flags       /* interface flags */
 
 #else /* CONFIG_NET_IPv6 */
 
@@ -123,6 +131,7 @@ struct ifreq
 #define ifr_hwaddr          lifr_ifru.lifru_hwaddr    /* MAC address */
 #define ifr_mtu             lifr_ifru.lifru_mtu       /* MTU */
 #define ifr_count           lifr_ifru.lifru_count     /* Number of devices */
+#define ifr_flags           lifr_ifru.lifru_flags     /* interface flags */
 
 #endif /* CONFIG_NET_IPv6 */
 
diff --git a/nuttx/include/nuttx/net/ioctl.h b/nuttx/include/nuttx/net/ioctl.h
index be3f597f4..d5d1a001c 100644
--- a/nuttx/include/nuttx/net/ioctl.h
+++ b/nuttx/include/nuttx/net/ioctl.h
@@ -146,9 +146,15 @@
 
 #define SIOCSIWPMKSA     _SIOC(0x0036) /* PMKSA cache operation */
 
+/* Interface flags */
+
+#define SIOCSIFFLAGS     _SIOC(0x0037) /* Sets the interface flags */
+#define SIOCGIFFLAGS     _SIOC(0x0038) /* Gets the interface flags */
+
 /****************************************************************************
  * Type Definitions
  ****************************************************************************/
+
 /* See include/net/if.h */
 
 /****************************************************************************
diff --git a/nuttx/include/nuttx/net/uip/uip-arch.h b/nuttx/include/nuttx/net/uip/uip-arch.h
index 9546de04e..73805c6fb 100644
--- a/nuttx/include/nuttx/net/uip/uip-arch.h
+++ b/nuttx/include/nuttx/net/uip/uip-arch.h
@@ -90,6 +90,10 @@ struct uip_driver_s
   char d_ifname[IFNAMSIZ];
 #endif
 
+  /* Drivers interface flags.  See IFF_* definitions in include/net/if.h */
+
+  uint8_t d_flags;
+
   /* Ethernet device identity */
 
 #ifdef CONFIG_NET_ETHERNET
diff --git a/nuttx/net/netdev_ioctl.c b/nuttx/net/netdev_ioctl.c
index 4b5876efa..ea5c0e436 100644
--- a/nuttx/net/netdev_ioctl.c
+++ b/nuttx/net/netdev_ioctl.c
@@ -138,19 +138,47 @@ static void ioctl_setipaddr(FAR uip_ipaddr_t *outaddr, FAR const void *inaddr)
  *
  ****************************************************************************/
 
-static inline void ioctl_ifup(FAR struct uip_driver_s *dev)
+static void ioctl_ifup(FAR struct uip_driver_s *dev)
 {
+  /* Make sure that the device supports the d_ifup() method */
+
   if (dev->d_ifup)
     {
-      dev->d_ifup(dev);
+      /* Is the interface already up? */
+
+      if ((dev->d_flags & IFF_RUNNING) == 0)
+        {
+          /* No, bring the interface up now */
+
+          if (dev->d_ifup(dev) == OK)
+            {
+              /* Mark the interface as up */
+
+              dev->d_flags |= IFF_RUNNING;
+            }
+        }
     }
 }
 
-static inline void ioctl_ifdown(FAR struct uip_driver_s *dev)
+static void ioctl_ifdown(FAR struct uip_driver_s *dev)
 {
+  /* Make sure that the device supports the d_ifdown() method */
+
   if (dev->d_ifdown)
     {
-      dev->d_ifdown(dev);
+      /* Is the interface already down? */
+
+      if ((dev->d_flags & IFF_RUNNING) != 0)
+        {
+          /* No, take the interface down now */
+
+          if (dev->d_ifdown(dev) == OK)
+            {
+              /* Mark the interface as down */
+
+              dev->d_flags &= ~IFF_RUNNING;
+            }
+        }
     }
 }
 
@@ -194,63 +222,130 @@ static int netdev_ifrioctl(FAR struct socket *psock, int cmd, struct ifreq *req)
 
   switch (cmd)
     {
-      case SIOCGIFADDR:     /* Get IP address */
-        ioctl_getipaddr(&req->ifr_addr, &dev->d_ipaddr);
+      case SIOCGIFADDR:  /* Get IP address */
+        {
+          ioctl_getipaddr(&req->ifr_addr, &dev->d_ipaddr);
+        }
         break;
 
-      case SIOCSIFADDR:     /* Set IP address */
-        ioctl_ifdown(dev);
-        ioctl_setipaddr(&dev->d_ipaddr, &req->ifr_addr);
-        ioctl_ifup(dev);
+      case SIOCSIFADDR:  /* Set IP address */
+        {
+          ioctl_ifdown(dev);
+          ioctl_setipaddr(&dev->d_ipaddr, &req->ifr_addr);
+          ioctl_ifup(dev);
+        }
         break;
 
       case SIOCGIFDSTADDR:  /* Get P-to-P address */
-        ioctl_getipaddr(&req->ifr_dstaddr, &dev->d_draddr);
+        {
+          ioctl_getipaddr(&req->ifr_dstaddr, &dev->d_draddr);
+        }
         break;
 
       case SIOCSIFDSTADDR:  /* Set P-to-P address */
-        ioctl_setipaddr(&dev->d_draddr, &req->ifr_dstaddr);
+        {
+          ioctl_setipaddr(&dev->d_draddr, &req->ifr_dstaddr);
+        }
         break;
 
       case SIOCGIFNETMASK:  /* Get network mask */
-        ioctl_getipaddr(&req->ifr_addr, &dev->d_netmask);
+        {
+          ioctl_getipaddr(&req->ifr_addr, &dev->d_netmask);
+        }
         break;
 
       case SIOCSIFNETMASK:  /* Set network mask */
-        ioctl_setipaddr(&dev->d_netmask, &req->ifr_addr);
+        {
+          ioctl_setipaddr(&dev->d_netmask, &req->ifr_addr);
+        }
         break;
 
       case SIOCGIFMTU:  /* Get MTU size */
-        req->ifr_mtu = CONFIG_NET_BUFSIZE;
+        {
+          req->ifr_mtu = CONFIG_NET_BUFSIZE;
+        }
+        break;
+
+      case SIOCSIFFLAGS:  /* Sets the interface flags */
+        {
+          /* Is this a request to bring the interface up? */
+
+          if (req->ifr_flags & IF_FLAG_IFUP)
+            {
+              /* Yes.. bring the interface up */
+
+              ioctl_ifup(dev);
+            }
+
+          /* Is this a request to take the interface down? */
+
+          else if (req->ifr_flags & IF_FLAG_IFDOWN)
+            {
+              /* Yes.. take the interface down */
+
+              ioctl_ifdown(dev);
+            }
+        }
+        break;
+
+      case SIOCGIFFLAGS:  /* Gets the interface flags */
+        {
+          req->ifr_flags = 0;
+
+          /* Is the interface running? */
+
+          if (dev->d_flags & IFF_RUNNING)
+            {
+              /* Yes.. report interface up */
+
+              req->ifr_flags |= IF_FLAG_IFUP;
+            }
+          else
+            {
+              /* No.. report interface down */
+
+              req->ifr_flags |= IF_FLAG_IFDOWN;
+            }
+        }
         break;
 
       /* MAC address operations only make sense if Ethernet is supported */
 
 #ifdef CONFIG_NET_ETHERNET
       case SIOCGIFHWADDR:  /* Get hardware address */
-        req->ifr_hwaddr.sa_family = AF_INETX;
-        memcpy(req->ifr_hwaddr.sa_data, dev->d_mac.ether_addr_octet, IFHWADDRLEN);
+        {
+          req->ifr_hwaddr.sa_family = AF_INETX;
+          memcpy(req->ifr_hwaddr.sa_data, dev->d_mac.ether_addr_octet, IFHWADDRLEN);
+        }
         break;
 
       case SIOCSIFHWADDR:  /* Set hardware address -- will not take effect until ifup */
-        req->ifr_hwaddr.sa_family = AF_INETX;
-        memcpy(dev->d_mac.ether_addr_octet, req->ifr_hwaddr.sa_data, IFHWADDRLEN);
+        {
+          req->ifr_hwaddr.sa_family = AF_INETX;
+          memcpy(dev->d_mac.ether_addr_octet, req->ifr_hwaddr.sa_data, IFHWADDRLEN);
+        }
         break;
 #endif
 
       case SIOCDIFADDR:  /* Delete IP address */
-        ioctl_ifdown(dev);
-        memset(&dev->d_ipaddr, 0, sizeof(uip_ipaddr_t));
+        {
+          ioctl_ifdown(dev);
+          memset(&dev->d_ipaddr, 0, sizeof(uip_ipaddr_t));
+        }
         break;
 
       case SIOCGIFCOUNT:  /* Get number of devices */
-        req->ifr_count = netdev_count();
-        ret = -ENOSYS;
+        {
+          req->ifr_count = netdev_count();
+          ret = -ENOSYS;
+        }
         break;
 
-      case SIOCGIFBRDADDR:  /* Get broadcast IP address	*/
-      case SIOCSIFBRDADDR:  /* Set broadcast IP address	*/
-        ret = -ENOSYS;
+      case SIOCGIFBRDADDR:  /* Get broadcast IP address */
+      case SIOCSIFBRDADDR:  /* Set broadcast IP address */
+        {
+          ret = -ENOSYS;
+        }
         break;
 
 #ifdef CONFIG_NET_ARPIOCTLS
@@ -261,7 +356,9 @@ static int netdev_ifrioctl(FAR struct socket *psock, int cmd, struct ifreq *req)
 #endif
 
       default:
-        ret = -EINVAL;
+        {
+          ret = -EINVAL;
+        }
         break;;
     }