Oops here is a file that I forget to add before a recent commit

net/net_allocroute.c

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+/****************************************************************************
+ * net/net_allocroute.c
+ *
+ *   Copyright (C) 2013 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 <errno.h>
+
+#include <arch/irq.h>
+
+#include "net_internal.h"
+#include "net_route.h"
+
+#if defined(CONFIG_NET) && defined(CONFIG_NET_ROUTE)
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/* This is the routing table */
+
+sq_queue_t g_routes;
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/* This is a list of free routing table entries */
+
+static sq_queue_t g_freeroutes;
+
+/* This is an array of pre-allocated network routes */
+
+static struct net_route_s g_preallocroutes[CONFIG_NET_MAXROUTES];
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function: net_initroute
+ *
+ * Description:
+ *   Initialize to the routing table
+ *
+ * Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   None
+ *
+ * Assumptions:
+ *   Called early in initialization so that no special protection is needed.
+ *
+ ****************************************************************************/
+
+void net_initroute(void)
+{
+  int i;
+
+  /* Initialize the routing table and the free list */
+
+  sq_init(&g_routes);
+  sq_init(&g_freeroutes);
+
+  /* All all of the pre-allocated routing table entries to a free list */
+
+  for (i = 0; i < CONFIG_NET_MAXROUTES; i++)
+    {
+      sq_addlast((FAR sq_entry_t *)&g_preallocroutes[i],
+                 (FAR sq_queue_t *)&g_freeroutes);
+    }    
+}
+
+/****************************************************************************
+ * Function: net_allocroute
+ *
+ * Description:
+ *   Allocate one route by removing it from the free list
+ *
+ * Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   On success, a pointer to the newly allocated route table entry is
+ *   returned; NULL is returned on failure.
+ *
+ ****************************************************************************/
+
+FAR struct net_route_s *net_allocroute(void)
+{
+  FAR struct net_route_s *route;
+  uip_lock_t save;
+
+  /* Get exclusive address to the networking data structures */
+
+  save = uip_lock();
+
+  /* Then add the new entry to the table */
+
+  route = (FAR struct net_route_s *)
+    sq_remfirst((FAR sq_queue_t *)&g_freeroutes);
+
+  uip_unlock(save);
+  return route;
+}
+
+/****************************************************************************
+ * Function: net_allocroute
+ *
+ * Description:
+ *   Free one route by adding it from the free list
+ *
+ * Parameters:
+ *   route - The route to be freed
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+void net_freeroute(FAR struct net_route_s *route)
+{
+  uip_lock_t save;
+
+  DEBUGASSERT(route);
+
+  /* Get exclusive address to the networking data structures */
+
+  save = uip_lock();
+
+  /* Then add the new entry to the table */
+
+  sq_addlast((FAR sq_entry_t *)route, (FAR sq_queue_t *)&g_freeroutes);
+  uip_unlock(save);
+}
+
+#endif /* CONFIG_NET && CONFIG_NET_ROUTE */