ICMPv6: This completes coding of the ICMPv6 auto-configuration feature. It is not yet functional

11 files changed, 141 insertions, 109 deletions

diff --git a/apps/examples/nettest/Kconfig b/apps/examples/nettest/Kconfig
index d5cd9b610..49d885a80 100644
--- a/apps/examples/nettest/Kconfig
+++ b/apps/examples/nettest/Kconfig
@@ -76,6 +76,7 @@ config EXAMPLES_NETTEST_CLIENTIP
 endif # EXAMPLES_NETTEST_IPv4
 
 if EXAMPLES_NETTEST_IPv6
+if !NET_ICMPv6_AUTOCONF
 
 comment "Target IPv6 address"
 
@@ -323,6 +324,8 @@ config EXAMPLES_NETTEST_IPv6NETMASK_8
 		individually.  This is the eighth of the 8-values.  The default for
 		all eight values is fe00::0.
 
+#endif /* NET_ICMPv6_AUTOCONF */
+
 comment "Client IPv6 address"
 
 config EXAMPLES_NETTEST_CLIENTIPv6ADDR_1
diff --git a/apps/examples/nettest/nettest.c b/apps/examples/nettest/nettest.c
index e4c9a1db3..b03b288c1 100644
--- a/apps/examples/nettest/nettest.c
+++ b/apps/examples/nettest/nettest.c
@@ -60,8 +60,7 @@
  * Private Data
  ****************************************************************************/
 
-#ifdef CONFIG_EXAMPLES_NETTEST_IPv6
-#ifndef CONFIG_NET_ICMPv6_AUTOCONF
+#if defined(CONFIG_EXAMPLES_NETTEST_IPv6) && !defined(CONFIG_NET_ICMPv6_AUTOCONF)
 /* Our host IPv6 address */
 
 static const uint16_t g_ipv6_hostaddr[8] =
@@ -75,7 +74,6 @@ static const uint16_t g_ipv6_hostaddr[8] =
   HTONS(CONFIG_EXAMPLES_NETTEST_IPv6ADDR_7),
   HTONS(CONFIG_EXAMPLES_NETTEST_IPv6ADDR_8),
 };
-#endif
 
 /* Default routine IPv6 address */
 
@@ -104,7 +102,7 @@ static const uint16_t g_ipv6_netmask[8] =
   HTONS(CONFIG_EXAMPLES_NETTEST_IPv6NETMASK_7),
   HTONS(CONFIG_EXAMPLES_NETTEST_IPv6NETMASK_8),
 };
-#endif /* CONFIG_EXAMPLES_NETTEST_IPv6 */
+#endif /* CONFIG_EXAMPLES_NETTEST_IPv6 && !CONFIG_NET_ICMPv6_AUTOCONF */
 
 /****************************************************************************
  * Public Functions
@@ -145,12 +143,12 @@ int nettest_main(int argc, char *argv[])
 
   netlib_icmpv6_autoconfiguration("eth0");
 
-#else
+#else /* CONFIG_NET_ICMPv6_AUTOCONF */
+
   /* Set up our fixed host address */
 
   netlib_set_ipv6addr("eth0",
                       (FAR const struct in6_addr *)g_ipv6_hostaddr);
-#endif
 
   /* Set up the default router address */
 
@@ -161,7 +159,10 @@ int nettest_main(int argc, char *argv[])
 
   netlib_set_ipv6netmask("eth0",
                         (FAR const struct in6_addr *)g_ipv6_netmask);
-#else
+
+#endif /* CONFIG_NET_ICMPv6_AUTOCONF */
+#else /* CONFIG_EXAMPLES_NETTEST_IPv6 */
+
   /* Set up our host address */
 
   addr.s_addr = HTONL(CONFIG_EXAMPLES_NETTEST_IPADDR);
@@ -176,7 +177,8 @@ int nettest_main(int argc, char *argv[])
 
   addr.s_addr = HTONL(CONFIG_EXAMPLES_NETTEST_NETMASK);
   netlib_set_ipv4netmask("eth0", &addr);
-#endif
+
+#endif /* CONFIG_EXAMPLES_NETTEST_IPv6 */
 
 #ifdef CONFIG_EXAMPLES_NETTEST_SERVER
   recv_server();
diff --git a/apps/examples/udp/Kconfig b/apps/examples/udp/Kconfig
index eecd937b0..ff357750e 100644
--- a/apps/examples/udp/Kconfig
+++ b/apps/examples/udp/Kconfig
@@ -56,6 +56,7 @@ config EXAMPLES_UDP_SERVERIP
 endif # EXAMPLES_UDP_IPv4
 
 if EXAMPLES_UDP_IPv6
+if !NET_ICMPv6_AUTOCONF
 
 comment "Target IPv6 address"
 
@@ -303,7 +304,9 @@ config EXAMPLES_UDP_IPv6NETMASK_8
 		individually.  This is the eighth of the 8-values.  The default for
 		all eight values is fe00::0.
 
-comment "Client IPv6 address"
+#endif /* NET_ICMPv6_AUTOCONF */
+
+comment "Server IPv6 address"
 
 config EXAMPLES_UDP_SERVERIPv6ADDR_1
 	hex "[0]"
diff --git a/apps/examples/udp/target.c b/apps/examples/udp/target.c
index 2d80ac0dc..48e28be8d 100644
--- a/apps/examples/udp/target.c
+++ b/apps/examples/udp/target.c
@@ -57,8 +57,7 @@
  * Private Data
  ****************************************************************************/
 
-#ifdef CONFIG_EXAMPLES_UDP_IPv6
-#ifdef CONFIG_NET_ICMPv6_AUTOCONF
+#if defined(CONFIG_EXAMPLES_UDP_IPv6) && !defined(CONFIG_NET_ICMPv6_AUTOCONF)
 /* Our host IPv6 address */
 
 static const uint16_t g_ipv6_hostaddr[8] =
@@ -72,7 +71,6 @@ static const uint16_t g_ipv6_hostaddr[8] =
   HTONS(CONFIG_EXAMPLES_UDP_IPv6ADDR_7),
   HTONS(CONFIG_EXAMPLES_UDP_IPv6ADDR_8),
 };
-#endif
 
 /* Default routine IPv6 address */
 
@@ -101,7 +99,7 @@ static const uint16_t g_ipv6_netmask[8] =
   HTONS(CONFIG_EXAMPLES_UDP_IPv6NETMASK_7),
   HTONS(CONFIG_EXAMPLES_UDP_IPv6NETMASK_8),
 };
-#endif /* CONFIG_EXAMPLES_UDP_IPv6 */
+#endif /* CONFIG_EXAMPLES_UDP_IPv6 && !CONFIG_NET_ICMPv6_AUTOCONF */
 
 /****************************************************************************
  * Public Functions
@@ -123,12 +121,12 @@ int udp_main(int argc, char *argv[])
 
   netlib_icmpv6_autoconfiguration("eth0");
 
-#else
+#else /* CONFIG_NET_ICMPv6_AUTOCONF */
+
   /* Set up our fixed host address */
 
   netlib_set_ipv6addr("eth0",
                       (FAR const struct in6_addr *)g_ipv6_hostaddr);
-#endif
 
   /* Set up the default router address */
 
@@ -139,7 +137,10 @@ int udp_main(int argc, char *argv[])
 
   netlib_set_ipv6netmask("eth0",
                         (FAR const struct in6_addr *)g_ipv6_netmask);
-#else
+
+#endif /* CONFIG_NET_ICMPv6_AUTOCONF */
+#else /* CONFIG_EXAMPLES_UDP_IPv6 */
+
   struct in_addr addr;
 
   /* Set up our host address */
@@ -156,7 +157,8 @@ int udp_main(int argc, char *argv[])
 
   addr.s_addr = HTONL(CONFIG_EXAMPLES_UDP_NETMASK);
   netlib_set_ipv4netmask("eth0", &addr);
-#endif
+
+#endif /* CONFIG_EXAMPLES_UDP_IPv6 */
 
 #ifdef CONFIG_EXAMPLES_UDP_SERVER
   recv_server();
diff --git a/apps/nshlib/Kconfig b/apps/nshlib/Kconfig
index 8bcd5eda7..dc1001020 100644
--- a/apps/nshlib/Kconfig
+++ b/apps/nshlib/Kconfig
@@ -930,8 +930,7 @@ config NSH_NETMASK
 
 endif # NET_IPv4
 
-if NET_IPv6
-if !NET_ICMPv6_AUTOCONF
+if NET_IPv6 && !NET_ICMPv6_AUTOCONF
 
 comment "Target IPv6 address"
 
@@ -1023,8 +1022,6 @@ config NSH_IPv6ADDR_8
 		individually.  This is the last of the 8-values.  The default for
 		all eight values is fc00::2.
 
-endif # !NET_ICMPv6_AUTOCONF
-
 comment "Router IPv6 address"
 
 config NSH_DRIPv6ADDR_1
@@ -1189,7 +1186,7 @@ config NSH_IPv6NETMASK_8
 		individually.  This is the eighth of the 8-values.  The default for
 		all eight values is fe00::0.
 
-endif #NET_IPv6
+endif #NET_IPv6 && !NET_ICMPv6_AUTOCONF
 endmenu # IP Address Configuration
 
 config NSH_DNS
diff --git a/apps/nshlib/nsh_netinit.c b/apps/nshlib/nsh_netinit.c
index c2b8bf952..1c4722909 100644
--- a/apps/nshlib/nsh_netinit.c
+++ b/apps/nshlib/nsh_netinit.c
@@ -131,8 +131,7 @@
 static sem_t g_notify_sem;
 #endif
 
-#ifdef CONFIG_NET_IPv6
-#ifndef CONFIG_NET_ICMPv6_AUTOCONF
+#if defined(CONFIG_NET_IPv6) && !defined(CONFIG_NET_ICMPv6_AUTOCONF)
 /* Host IPv6 address */
 
 static const uint16_t g_ipv6_hostaddr[8] =
@@ -146,7 +145,6 @@ static const uint16_t g_ipv6_hostaddr[8] =
   HTONS(CONFIG_NSH_IPv6ADDR_7),
   HTONS(CONFIG_NSH_IPv6ADDR_8),
 };
-#endif /* CONFIG_NET_ICMPv6_AUTOCONF */
 
 /* Default routine IPv6 address */
 
@@ -175,7 +173,7 @@ static const uint16_t g_ipv6_netmask[8] =
   HTONS(CONFIG_NSH_IPv6NETMASK_7),
   HTONS(CONFIG_NSH_IPv6NETMASK_8),
 };
-#endif /* CONFIG_NET_IPv6 */
+#endif /* CONFIG_NET_IPv6 && !CONFIG_NET_ICMPv6_AUTOCONF*/
 
 /****************************************************************************
  * Private Function Prototypes
@@ -260,13 +258,12 @@ static void nsh_netinit_configure(void)
 
   netlib_icmpv6_autoconfiguration(NET_DEVNAME);
 
-#else
+#else /* CONFIG_NET_ICMPv6_AUTOCONF */
 
   /* Set up our fixed host address */
 
   netlib_set_ipv6addr(NET_DEVNAME,
                       (FAR const struct in6_addr *)g_ipv6_hostaddr);
-#endif
 
   /* Set up the default router address */
 
@@ -277,7 +274,9 @@ static void nsh_netinit_configure(void)
 
   netlib_set_ipv6netmask(NET_DEVNAME,
                         (FAR const struct in6_addr *)g_ipv6_netmask);
-#endif
+
+#endif /* CONFIG_NET_ICMPv6_AUTOCONF */
+#endif /* CONFIG_NET_IPv6 */
 
 #if defined(CONFIG_NSH_DHCPC) || defined(CONFIG_NSH_DNS)
   /* Set up the resolver */
diff --git a/nuttx/net/icmpv6/icmpv6.h b/nuttx/net/icmpv6/icmpv6.h
index 2a9a094f2..67a6be624 100644
--- a/nuttx/net/icmpv6/icmpv6.h
+++ b/nuttx/net/icmpv6/icmpv6.h
@@ -93,10 +93,6 @@ struct icmpv6_rnotify_s
 {
 #ifdef CONFIG_NET_MULTILINK
   FAR struct icmpv6_notify_s *rn_flink; /* Supports singly linked list */
-#endif
-  net_ipv6addr_t rn_prefix;             /* Waited for router prefix */
-  uint8_t rn_preflen;                   /* Prefix length (# valid leading bits) */
-#ifdef CONFIG_NET_MULTILINK
   char rn_ifname[IFNAMSIZ];             /* Device name */
 #endif
   sem_t rn_sem;                         /* Will wake up the waiter */
@@ -431,6 +427,9 @@ int icmpv6_rwait(FAR struct icmpv6_rnotify_s *notify,
  *   wake-up any threads that may be waiting for this particular Router
  *   Advertisement.
  *
+ *   NOTE:  On success the network has the new address applied and is in
+ *   the down state.
+ *
  * Assumptions:
  *   This function is called from the MAC device driver indirectly through
  *   icmpv6_icmpv6in() will execute with the network locked.
@@ -438,8 +437,8 @@ int icmpv6_rwait(FAR struct icmpv6_rnotify_s *notify,
  ****************************************************************************/
 
 #ifdef CONFIG_NET_ICMPv6_AUTOCONF
-void icmpv6_rnotify(FAR struct net_driver_s *dev, const net_ipv6addr_t prefix,
-                    unsigned int preflen);
+void icmpv6_rnotify(FAR struct net_driver_s *dev, const net_ipv6addr_t draddr,
+                    const net_ipv6addr_t prefix, unsigned int preflen);
 #else
 #  define icmpv6_rnotify(d,p,l)
 #endif
diff --git a/nuttx/net/icmpv6/icmpv6_autoconfig.c b/nuttx/net/icmpv6/icmpv6_autoconfig.c
index ed7577d08..747651e3d 100644
--- a/nuttx/net/icmpv6/icmpv6_autoconfig.c
+++ b/nuttx/net/icmpv6/icmpv6_autoconfig.c
@@ -52,6 +52,7 @@
 #include <nuttx/net/netdev.h>
 
 #include "devif/devif.h"
+#include "netdev/netdev.h"
 #include "icmpv6/icmpv6.h"
 
 /****************************************************************************
@@ -327,7 +328,7 @@ int icmpv6_autoconfig(FAR struct net_driver_s *dev)
   ndbg("ERROR: Only Ethernet is supported\n");
   return -ENOSYS;
 
-#else
+#else /* CONFIG_NET_ETHERNET */
   struct icmpv6_rnotify_s notify;
   net_ipv6addr_t lladdr;
   net_lock_t save;
@@ -348,6 +349,11 @@ int icmpv6_autoconfig(FAR struct net_driver_s *dev)
       return -ENOSYS;
     }
 #endif
+  /* The interface should be in the down state */
+
+ save = net_lock();
+ netdev_ifdown(dev);
+ net_unlock(save);
 
   /* IPv6 Stateless Autoconfiguration
    * Reference: http://www.tcpipguide.com/free/t_IPv6AutoconfiguratinoandRenumbering.htm
@@ -378,6 +384,10 @@ int icmpv6_autoconfig(FAR struct net_driver_s *dev)
   memset(&lladdr[1], 0, 4* sizeof(uint16_t));                /* 64 more zeroes */
   memcpy(&lladdr[5], dev->d_mac.ether_addr_octet, sizeof(struct ether_addr)); /* 48-bit Ethernet address */
 
+  nvdbg("lladdr=%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
+        lladdr[0], lladdr[1], lladdr[2], lladdr[3],
+        lladdr[4], lladdr[6], lladdr[6], lladdr[7]);
+
 #ifdef CONFIG_NET_ICMPv6_NEIGHBOR
   /* 2. Link-Local Address Uniqueness Test: The node tests to ensure that
    *    the address it generated isn't for some reason already in use on the
@@ -410,6 +420,11 @@ int icmpv6_autoconfig(FAR struct net_driver_s *dev)
 
   net_ipv6addr_copy(dev->d_ipv6addr, lladdr);
 
+  /* Bring the interface up with the new, temporary IP address */
+
+  save = net_lock();
+  netdev_ifup(dev);
+
   /* 4. Router Contact: The node next attempts to contact a local router for
    *    more information on continuing the configuration. This is done either
    *    by listening for Router Advertisement messages sent periodically by
@@ -417,7 +432,6 @@ int icmpv6_autoconfig(FAR struct net_driver_s *dev)
    *    for information on what to do next.
    */
 
-  save = net_lock();
   for (retries = 0; retries < CONFIG_ICMPv6_AUTOCONF_MAXTRIES; retries++)
     {
       /* Set up the Router Advertisement BEFORE we send the Router
@@ -447,17 +461,22 @@ int icmpv6_autoconfig(FAR struct net_driver_s *dev)
           break;
         }
 
-      nvdbg("Timed out... retrying\n");
+      nvdbg("Timed out... retrying %d\n", retries + 1);
     }
 
-  net_unlock(save);
-
-  /* Check for failures */
+  /* Check for failures.  Note:  On successful return, the network will be 
+   * in the down state, but not in the event of failures.
+   */
 
   if (ret < 0)
     {
       ndbg("ERROR: Failed to get the router advertisement: %d (retries=%d)\n",
            ret, retries);
+
+      /* Take the network down and return the failure */
+
+      netdev_ifdown(dev);
+      net_unlock(save);
       return ret;
     }
 
@@ -466,20 +485,23 @@ int icmpv6_autoconfig(FAR struct net_driver_s *dev)
    *    network "stateful" auto-configuration is in use, and tell it the
    *    address of a DHCP server to use. Alternately, it will tell the host
    *    how to determine its global Internet address.
-   */
-#warning Missing logic
-
-  /* 6. Global Address Configuration: Assuming that stateless auto-
+   *
+   * 6. Global Address Configuration: Assuming that stateless auto-
    *    configuration is in use on the network, the host will configure
    *    itself with its globally-unique Internet address. This address is
    *    generally formed from a network prefix provided to the host by the
    *    router, combined with the device's identifier as generated in the
    *    first step.
    */
-#warning Missing logic
 
-  return ret;
-#endif
+   /* On success, the new address was already set (in icmpv_rnotify()).  We
+    * need only to bring the network back to the up state and return success.
+    */
+
+  netdev_ifup(dev);
+  net_unlock(save);
+  return OK;
+#endif /* CONFIG_NET_ETHERNET */
 }
 
 #endif /* CONFIG_NET_ICMPv6_AUTOCONF */
diff --git a/nuttx/net/icmpv6/icmpv6_input.c b/nuttx/net/icmpv6/icmpv6_input.c
index e3dc4d24b..8aeaddfe8 100644
--- a/nuttx/net/icmpv6/icmpv6_input.c
+++ b/nuttx/net/icmpv6/icmpv6_input.c
@@ -321,7 +321,7 @@ void icmpv6_input(FAR struct net_driver_s *dev)
               {
                 /* Yes.. Notify any waiting threads */
 
-                icmpv6_rnotify(dev, opt->prefix, opt->preflen);
+                icmpv6_rnotify(dev, icmp->srcipaddr, opt->prefix, opt->preflen);
                 goto icmpv_send_nothing;
               }
 
diff --git a/nuttx/net/netdev/netdev.h b/nuttx/net/netdev/netdev.h
index 28dbf83f1..d0083723b 100644
--- a/nuttx/net/netdev/netdev.h
+++ b/nuttx/net/netdev/netdev.h
@@ -85,6 +85,11 @@ void netdev_semtake(void);
 void netdev_semgive(void);
 #endif
 
+/* netdev_ioctl.c ************************************************************/
+
+void netdev_ifup(FAR struct net_driver_s *dev);
+void netdev_ifdown(FAR struct net_driver_s *dev);
+
 /* netdev_findbyname.c *******************************************************/
 
 #if CONFIG_NSOCKET_DESCRIPTORS > 0
diff --git a/nuttx/net/netdev/netdev_ioctl.c b/nuttx/net/netdev/netdev_ioctl.c
index 7a61897dc..5eae3b816 100644
--- a/nuttx/net/netdev/netdev_ioctl.c
+++ b/nuttx/net/netdev/netdev_ioctl.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * net/netdev/netdev_ioctl.c
  *
- *   Copyright (C) 2007-2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007-2012, 2015 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -316,58 +316,6 @@ static void ioctl_setipv6addr(FAR net_ipv6addr_t outaddr,
 #endif
 
 /****************************************************************************
- * Name: ioctl_ifup / ioctl_ifdown
- *
- * Description:
- *   Bring the interface up/down
- *
- ****************************************************************************/
-
-static void ioctl_ifup(FAR struct net_driver_s *dev)
-{
-  /* Make sure that the device supports the d_ifup() method */
-
-  if (dev->d_ifup)
-    {
-      /* Is the interface already up? */
-
-      if ((dev->d_flags & IFF_UP) == 0)
-        {
-          /* No, bring the interface up now */
-
-          if (dev->d_ifup(dev) == OK)
-            {
-              /* Mark the interface as up */
-
-              dev->d_flags |= IFF_UP;
-            }
-        }
-    }
-}
-
-static void ioctl_ifdown(FAR struct net_driver_s *dev)
-{
-  /* Make sure that the device supports the d_ifdown() method */
-
-  if (dev->d_ifdown)
-    {
-      /* Is the interface already down? */
-
-      if ((dev->d_flags & IFF_UP) != 0)
-        {
-          /* No, take the interface down now */
-
-          if (dev->d_ifdown(dev) == OK)
-            {
-              /* Mark the interface as down */
-
-              dev->d_flags &= ~IFF_UP;
-            }
-        }
-    }
-}
-
-/****************************************************************************
  * Name: netdev_ifrdev
  *
  * Description:
@@ -445,9 +393,9 @@ static int netdev_ifrioctl(FAR struct socket *psock, int cmd,
           dev = netdev_ifrdev(req);
           if (dev)
             {
-              ioctl_ifdown(dev);
+              netdev_ifdown(dev);
               ioctl_setipv4addr(&dev->d_ipaddr, &req->ifr_addr);
-              ioctl_ifup(dev);
+              netdev_ifup(dev);
               ret = OK;
             }
         }
@@ -538,9 +486,9 @@ static int netdev_ifrioctl(FAR struct socket *psock, int cmd,
             {
               FAR struct lifreq *lreq = (FAR struct lifreq *)req;
 
-              ioctl_ifdown(dev);
+              netdev_ifdown(dev);
               ioctl_setipv6addr(dev->d_ipv6addr, &lreq->lifr_addr);
-              ioctl_ifup(dev);
+              netdev_ifup(dev);
               ret = OK;
             }
         }
@@ -650,7 +598,7 @@ static int netdev_ifrioctl(FAR struct socket *psock, int cmd,
                 {
                   /* Yes.. bring the interface up */
 
-                  ioctl_ifup(dev);
+                  netdev_ifup(dev);
                 }
 
               /* Is this a request to take the interface down? */
@@ -659,7 +607,7 @@ static int netdev_ifrioctl(FAR struct socket *psock, int cmd,
                 {
                   /* Yes.. take the interface down */
 
-                  ioctl_ifdown(dev);
+                  netdev_ifdown(dev);
                 }
             }
 
@@ -713,7 +661,7 @@ static int netdev_ifrioctl(FAR struct socket *psock, int cmd,
           dev = netdev_ifrdev(req);
           if (dev)
             {
-              ioctl_ifdown(dev);
+              netdev_ifdown(dev);
 #ifdef CONFIG_NET_IPv4
               dev->d_ipaddr = 0;
 #endif
@@ -1051,4 +999,56 @@ errout:
   return ERROR;
 }
 
+/****************************************************************************
+ * Name: netdev_ifup / netdev_ifdown
+ *
+ * Description:
+ *   Bring the interface up/down
+ *
+ ****************************************************************************/
+
+void netdev_ifup(FAR struct net_driver_s *dev)
+{
+  /* Make sure that the device supports the d_ifup() method */
+
+  if (dev->d_ifup)
+    {
+      /* Is the interface already up? */
+
+      if ((dev->d_flags & IFF_UP) == 0)
+        {
+          /* No, bring the interface up now */
+
+          if (dev->d_ifup(dev) == OK)
+            {
+              /* Mark the interface as up */
+
+              dev->d_flags |= IFF_UP;
+            }
+        }
+    }
+}
+
+void netdev_ifdown(FAR struct net_driver_s *dev)
+{
+  /* Make sure that the device supports the d_ifdown() method */
+
+  if (dev->d_ifdown)
+    {
+      /* Is the interface already down? */
+
+      if ((dev->d_flags & IFF_UP) != 0)
+        {
+          /* No, take the interface down now */
+
+          if (dev->d_ifdown(dev) == OK)
+            {
+              /* Mark the interface as down */
+
+              dev->d_flags &= ~IFF_UP;
+            }
+        }
+    }
+}
+
 #endif /* CONFIG_NET && CONFIG_NSOCKET_DESCRIPTORS */