Finished partitioning uip.c (now system is broken)

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@375 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 243 insertions, 0 deletions

diff --git a/nuttx/net/uip/uip-icmpinput.c b/nuttx/net/uip/uip-icmpinput.c
new file mode 100644
index 000000000..c3d30dd4e
--- /dev/null
+++ b/nuttx/net/uip/uip-icmpinput.c
@@ -0,0 +1,243 @@
+/****************************************************************************
+ * net/uip/uip-icmpinput.c
+ * Handling incoming ICMP/ICMP6 input
+ *
+ *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Adapted for NuttX from logic in uIP which also has a BSD-like license:
+ *
+ *   Original author Adam Dunkels <adam@dunkels.com>
+ *   Copyright () 2001-2003, Adam Dunkels.
+ *   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. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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>
+#ifdef CONFIG_NET
+
+#include <sys/types.h>
+#include <debug.h>
+
+#include <net/uip/uipopt.h>
+#include <net/uip/uip.h>
+#include <net/uip/uip-arch.h>
+
+#include "uip-internal.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+#define ICMPBUF ((struct uip_icmpip_hdr *)&dev->d_buf[UIP_LLH_LEN])
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: uip_icmpinput
+ *
+ * Description:
+ *   Handle incoming ICMP/ICMP6 input
+ *
+ * Parameters:
+ *   dev - The device driver structure containing the received ICMP/ICMP6
+ *         packet
+ *
+ * Return:
+ *   None
+ *
+ * Assumptions:
+ *   Called from the interrupt level or with interrupts disabled.
+ *
+ ****************************************************************************/
+
+void uip_icmpinput(struct uip_driver_s *dev)
+{
+#ifdef CONFIG_NET_STATISTICS
+  uip_stat.icmp.recv++;
+#endif
+
+#ifndef CONFIG_NET_IPv6
+  /* ICMPv4 processing code follows. */
+
+  /* ICMP echo (i.e., ping) processing. This is simple, we only change the
+   * ICMP type from ECHO to ECHO_REPLY and adjust the ICMP checksum before
+   * we return the packet.
+   */
+
+  if (ICMPBUF->type != ICMP_ECHO)
+    {
+      uip_log("icmp: not ICMP echo.");
+      goto typeerr;
+    }
+
+  /* If we are configured to use ping IP address assignment, we use
+   * the destination IP address of this ping packet and assign it to
+   * ourself.
+   */
+
+#if UIP_PINGADDRCONF
+  if (dev->d_ipaddr == 0)
+    {
+      dev->d_ipaddr = ICMPBUF->destipaddr;
+    }
+#endif /* UIP_PINGADDRCONF */
+
+  ICMPBUF->type = ICMP_ECHO_REPLY;
+
+  if (ICMPBUF->icmpchksum >= HTONS(0xffff - (ICMP_ECHO << 8)))
+    {
+      ICMPBUF->icmpchksum += HTONS(ICMP_ECHO << 8) + 1;
+    }
+  else
+    {
+      ICMPBUF->icmpchksum += HTONS(ICMP_ECHO << 8);
+    }
+
+  /* Swap IP addresses. */
+
+  uiphdr_ipaddr_copy(ICMPBUF->destipaddr, ICMPBUF->srcipaddr);
+  uiphdr_ipaddr_copy(ICMPBUF->srcipaddr, &dev->d_ipaddr);
+
+  vdbg("Outgoing ICMP packet length: %d (%d)\n",
+       dev->d_len, (ICMPBUF->len[0] << 8) | ICMPBUF->len[1]);
+
+#ifdef CONFIG_NET_STATISTICS
+  uip_stat.icmp.sent++;
+  uip_stat.ip.sent++;
+#endif
+  return;
+
+typeerr:
+#ifdef CONFIG_NET_STATISTICS
+  uip_stat.icmp.typeerr++;
+  uip_stat.icmp.drop++;
+#endif
+  dev->d_len = 0;
+
+#else /* !CONFIG_NET_IPv6 */
+
+  /* If we get a neighbor solicitation for our address we should send
+   * a neighbor advertisement message back.
+   */
+
+  if (ICMPBUF->type == ICMP6_NEIGHBOR_SOLICITATION)
+    {
+      if (uip_ipaddr_cmp(ICMPBUF->icmp6data, dev->d_ipaddr))
+        {
+          if (ICMPBUF->options[0] == ICMP6_OPTION_SOURCE_LINK_ADDRESS)
+            {
+              /* Save the sender's address in our neighbor list. */
+
+              uiphdr_neighbor_add(ICMPBUF->srcipaddr, &(ICMPBUF->options[2]));
+            }
+
+          /* We should now send a neighbor advertisement back to where the
+           * neighbor solicication came from.
+           */
+
+          ICMPBUF->type = ICMP6_NEIGHBOR_ADVERTISEMENT;
+          ICMPBUF->flags = ICMP6_FLAG_S; /* Solicited flag. */
+
+          ICMPBUF->reserved1 = ICMPBUF->reserved2 = ICMPBUF->reserved3 = 0;
+
+          uiphdr_ipaddr_copy(ICMPBUF->destipaddr, ICMPBUF->srcipaddr);
+          uiphdr_ipaddr_copy(ICMPBUF->srcipaddr, dev->d_ipaddr);
+          ICMPBUF->options[0] = ICMP6_OPTION_TARGET_LINK_ADDRESS;
+          ICMPBUF->options[1] = 1;  /* Options length, 1 = 8 bytes. */
+          memcpy(&(ICMPBUF->options[2]), &dev->d_mac, IFHWADDRLEN);
+          ICMPBUF->icmpchksum = 0;
+          ICMPBUF->icmpchksum = ~uip_icmp6chksum(dev);
+        }
+      else
+        {
+          goto drop;
+        }
+    }
+  else if (ICMPBUF->type == ICMP6_ECHO)
+    {
+      /* ICMP echo (i.e., ping) processing. This is simple, we only
+       * change the ICMP type from ECHO to ECHO_REPLY and update the
+       * ICMP checksum before we return the packet.
+       */
+
+      ICMPBUF->type = ICMP6_ECHO_REPLY;
+
+      uiphdr_ipaddr_copy(ICMPBUF->destipaddr, ICMPBUF->srcipaddr);
+      uiphdr_ipaddr_copy(ICMPBUF->srcipaddr, dev->d_ipaddr);
+      ICMPBUF->icmpchksum = 0;
+      ICMPBUF->icmpchksum = ~uip_icmp6chksum(dev);
+    }
+  else
+    {
+      uip_log("icmp: unknown ICMP6 message.");
+      goto typeerr;
+    }
+
+  vdbg("Outgoing ICMP6 packet length: %d (%d)\n",
+       dev->d_len, (ICMPBUF->len[0] << 8) | ICMPBUF->len[1]);
+
+#ifdef CONFIG_NET_STATISTICS
+  uip_stat.icmp.sent++;
+  uip_stat.ip.sent++;
+#endif
+  return;
+
+typeerr:
+#ifdef CONFIG_NET_STATISTICS
+  uip_stat.icmp.typeerr++;
+#endif
+
+drop:
+#ifdef CONFIG_NET_STATISTICS
+  uip_stat.icmp.drop++;
+#endif
+  dev->d_len = 0;
+
+#endif /* !CONFIG_NET_IPv6 */
+}
+
+#endif /* CONFIG_NET */