Add netdev_unregister()

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3415 42af7a65-404d-4744-a932-0658087f49c3

include/nuttx/net.h

@@ -202,6 +202,11 @@ EXTERN int net_vfcntl(int sockfd, int cmd, va_list ap);
 
 EXTERN int netdev_register(FAR struct uip_driver_s *dev);
 
+/* netdev-unregister.c *********************************************************/
+/* Unregister a network device driver. */
+
+EXTERN int netdev_unregister(FAR struct uip_driver_s *dev);
+
 /* net_foreach.c ************************************************************/
 /* Enumerates all registered network devices */
 

net/Makefile

@@ -58,7 +58,7 @@ endif
 NETDEV_ASRCS	=
 NETDEV_CSRCS	= netdev_register.c netdev_ioctl.c net_poll.c netdev_txnotify.c \
 		  netdev_findbyname.c netdev_findbyaddr.c netdev_count.c \
-		  netdev_foreach.c
+		  netdev_foreach.c netdev_unregister.c
 
 include uip/Make.defs
 endif

net/netdev_register.c

@@ -104,7 +104,7 @@ void netdev_semtake(void)
 
   while (uip_lockedwait(&g_netdev_sem) != 0)
     {
-      /* The only case that an error should occr here is if
+      /* The only case that an error should occur here is if
        * the wait was awakened by a signal.
        */
 
@@ -116,17 +116,17 @@ void netdev_semtake(void)
  * Function: netdev_register
  *
  * Description:
- *   Register a netword device driver and assign a name to it so tht it can
+ *   Register a network device driver and assign a name to it so tht it can
  *   be found in subsequent network ioctl operations on the device.
  *
  * Parameters:
  *   dev - The device driver structure to register
  *
  * Returned Value:
- *  0:Success; -1 on failure
+ *   0:Success; negated errno on failure
  *
  * Assumptions:
- *  Called during system initialization from normal user mode
+ *   Called during system initialization from normal user mode
  *
  ****************************************************************************/
 
@@ -140,7 +140,7 @@ int netdev_register(FAR struct uip_driver_s *dev)
       /* Assign a device name to the interface */
 
       devnum = g_next_devnum++;
-      snprintf( dev->d_ifname, IFNAMSIZ, NETDEV_FORMAT, devnum );
+      snprintf(dev->d_ifname, IFNAMSIZ, NETDEV_FORMAT, devnum );
 
       /* Add the device to the list of known network devices */
 

net/netdev_unregister.c

+/****************************************************************************
+ * net/netdev_unregister.c
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 <stdio.h>
+#include <semaphore.h>
+#include <assert.h>
+#include <string.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <net/if.h>
+#include <net/ethernet.h>
+#include <net/uip/uip-arch.h>
+
+#include "net_internal.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+#ifdef CONFIG_NET_SLIP
+#  define NETDEV_FORMAT "sl%d"
+#else
+#  define NETDEV_FORMAT "eth%d"
+#endif
+
+/****************************************************************************
+ * Priviate Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static int g_next_devnum = 0;
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function: netdev_unregister
+ *
+ * Description:
+ *   Unregister a network device driver.
+ *
+ * Parameters:
+ *   dev - The device driver structure to un-register
+ *
+ * Returned Value:
+ *   0:Success; negated errno on failure
+ *
+ * Assumptions:
+ *   Currently only called for USB networking devices when the device is
+ *   physically removed from the slot
+ *
+ ****************************************************************************/
+
+int netdev_unregister(FAR struct uip_driver_s *dev)
+{
+  struct uip_driver_s *prev;
+  struct uip_driver_s *curr;
+
+  if (dev)
+    {
+      netdev_semtake();
+
+      /* Find the device in the list of known network devices */
+
+      for (prev = NULL, curr = g_netdevices;
+           curr && curr != dev;
+           prev = curr, curr = curr->flink);
+
+      /* Remove the device to the list of known network devices */
+
+      if (curr)
+        {
+          /* Where was the entry */
+
+          if (prev)
+            {
+              /* The entry was in the middle or at the end of the list */
+
+              prev->flink = curr->flink;
+            }
+          else
+            {
+               /* The entry was at the beginning of the list */
+
+               g_netdevices = curr;
+            }
+
+          curr->flink = NULL;
+        }
+
+      netdev_semgive();
+
+#ifdef CONFIG_NET_ETHERNET
+      nlldbg("Unregistered MAC: %02x:%02x:%02x:%02x:%02x:%02x as dev: %s\n",
+             dev->d_mac.ether_addr_octet[0], dev->d_mac.ether_addr_octet[1],
+             dev->d_mac.ether_addr_octet[2], dev->d_mac.ether_addr_octet[3],
+             dev->d_mac.ether_addr_octet[4], dev->d_mac.ether_addr_octet[5],
+             dev->d_ifname);
+#else
+      nlldbg("Registered dev: %s\n", dev->d_ifname);
+#endif
+      return OK;
+    }
+
+  return -EINVAL;
+}
+
+#endif /* CONFIG_NET && CONFIG_NSOCKET_DESCRIPTORS */

net/uip/uip_igmpinit.c

@@ -80,6 +80,7 @@ uip_ipaddr_t g_allrouters;
  *   Perform one-time IGMP initialization.
  *
  ****************************************************************************/
+
 void uip_igmpinit(void)
 {
   nvdbg("IGMP initializing\n");