Network: Add a file of IPv6 globals

net/ipv6/Make.defs

@@ -37,7 +37,7 @@
 
 ifeq ($(CONFIG_NET_IPv6),y)
 
-NET_CSRCS += net_neighbor.c
+NET_CSRCS += ipv6_global.c ipv6_neighbor.c
 
 # Include utility build support
 

net/ipv6/ipv6.h

@@ -51,6 +51,8 @@
 
 #include <nuttx/net/ip.h>
 
+#ifdef CONFIG_NET_IPv6
+
 /****************************************************************************
  * Public Types
  ****************************************************************************/
@@ -64,6 +66,12 @@ struct net_neighbor_addr_s
 #endif
 };
 
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+extern const in6_addr_t g_in6addr_any;
+
 /****************************************************************************
  * Public Function Prototypes
  ****************************************************************************/
@@ -74,4 +82,6 @@ void net_neighbor_update(net_ipaddr_t ipaddr);
 struct net_neighbor_addr_s *net_neighbor_lookup(net_ipaddr_t ipaddr);
 void net_neighbor_periodic(void);
 
+#endif /* CONFIG_NET_IPv6 */
 #endif /* __NET_IPV6_IPV6_H */
+

net/ipv6/ipv6_global.c

+/****************************************************************************
+ * net/ipv6/ipv6_global.c
+ *
+ *   Copyright (C) 2012, 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 <netinit/in.h>
+#include "ipv6/ipv6.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+const in6_addr_t g_in6addr_any = IN6ADDR_ANY_INIT;
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/

net/ipv6/ipv6_neighbor.c

+/****************************************************************************
+ * net/ipv6/ipv6_neighbor.c
+ * Database of link-local neighbors, used by IPv6 code and to be used by
+ * a future ARP code rewrite.
+ *
+ *   Author: Adam Dunkels <adam@sics.se>
+ *   Copyright (c) 2006, Swedish Institute of Computer Science.
+ *  All rights reserved.
+ *
+ * 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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 <string.h>
+#include <debug.h>
+
+#include <nuttx/net/ip.h>
+
+#include "ipv6/ipv6.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define MAX_TIME 128
+
+#ifdef CONFIG_NET_IPV6_NCONF_ENTRIES
+#  define ENTRIES CONFIG_NET_IPV6_NCONF_ENTRIES
+#else /* CONFIG_NET_IPV6_NCONF_ENTRIES */
+#  define ENTRIES 8
+#endif /* CONFIG_NET_IPV6_NCONF_ENTRIES */
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct neighbor_entry
+{
+  net_ipaddr_t ipaddr;
+  struct net_neighbor_addr_s addr;
+  uint8_t time;
+};
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static struct neighbor_entry entries[ENTRIES];
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static struct neighbor_entry *find_entry(net_ipaddr_t ipaddr)
+{
+  int i;
+
+  for (i = 0; i < ENTRIES; ++i)
+    {
+      if (net_ipaddr_cmp(entries[i].ipaddr, ipaddr))
+        {
+          return &entries[i];
+        }
+    }
+
+  return NULL;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+void net_neighbor_init(void)
+{
+  int i;
+
+  for (i = 0; i < ENTRIES; ++i)
+    {
+      entries[i].time = MAX_TIME;
+    }
+}
+
+void net_neighbor_periodic(void)
+{
+  int i;
+
+  for (i = 0; i < ENTRIES; ++i)
+    {
+      if (entries[i].time < MAX_TIME)
+        {
+        entries[i].time++;
+        }
+    }
+}
+
+void net_neighbor_add(net_ipaddr_t ipaddr, struct net_neighbor_addr_s *addr)
+{
+  uint8_t oldest_time;
+  int     oldest;
+  int     i;
+
+  nlldbg("Add neighbor: %02x:%02x:%02x:%02x:%02x:%02x\n",
+         addr->addr.ether_addr_octet[0], addr->addr.ether_addr_octet[1],
+         addr->addr.ether_addr_octet[2], addr->addr.ether_addr_octet[3],
+         addr->addr.ether_addr_octet[4], addr->addr.ether_addr_octet[5]);
+
+  /* Find the first unused entry or the oldest used entry. */
+
+  oldest_time = 0;
+  oldest = 0;
+
+  for (i = 0; i < ENTRIES; ++i)
+    {
+      if (entries[i].time == MAX_TIME)
+        {
+          oldest = i;
+          break;
+        }
+      if (net_ipaddr_cmp(entries[i].ipaddr, addr))
+        {
+          oldest = i;
+          break;
+        }
+      if (entries[i].time > oldest_time)
+        {
+          oldest = i;
+          oldest_time = entries[i].time;
+        }
+    }
+
+  /* Use the oldest or first free entry (either pointed to by the
+   * "oldest" variable).
+   */
+
+  entries[oldest].time = 0;
+  net_ipaddr_copy(entries[oldest].ipaddr, ipaddr);
+  memcpy(&entries[oldest].addr, addr, sizeof(struct net_neighbor_addr_s));
+}
+
+void net_neighbor_update(net_ipaddr_t ipaddr)
+{
+  struct neighbor_entry *e;
+
+  e = find_entry(ipaddr);
+  if (e != NULL)
+    {
+      e->time = 0;
+    }
+}
+
+struct net_neighbor_addr_s *net_neighbor_lookup(net_ipaddr_t ipaddr)
+{
+  struct neighbor_entry *e;
+
+  e = find_entry(ipaddr);
+  if (e != NULL)
+    {
+      nlldbg("Lookup neighbor: %02x:%02x:%02x:%02x:%02x:%02x\n",
+             e->addr.addr.ether_addr_octet[0], e->addr.addr.ether_addr_octet[1],
+             e->addr.addr.ether_addr_octet[2], e->addr.addr.ether_addr_octet[3],
+             e->addr.addr.ether_addr_octet[4], e->addr.addr.ether_addr_octet[5]);
+
+      return &e->addr;
+    }
+
+  return NULL;
+}