ARP: Add missing configuration option to select dumping of ARP packet headers....

ARP: Add missing configuration option to select dumping of ARP packet headers.  Move ARP dumping logic from arp_inout.c to its own file

net/arp/Kconfig

@@ -34,5 +34,12 @@ config NET_ARP_IPIN
 		Harvest IP/MAC address mappings from the ARP table
 		from incoming IP packets.
 
+config NET_ARP_DUMP
+	bool "Dump ARP packet header"
+	default n
+	depends on DEBUG
+	---help---
+		Dump ARP packets to the SYSLOG device.
+
 endif # NET_ARP
 endmenu # ARP Configuration

net/arp/Make.defs

@@ -38,6 +38,10 @@
 ifneq ($(CONFIG_NET_SLIP),y)
 NET_CSRCS += arp_inout.c arp_table.c arp_timer.c
 
+ifeq ($(CONFIG_NET_ARP_DUMP),y)
+NET_CSRCS += arp_dump.c
+endif
+
 # Include arp build support
 
 DEPPATH += --dep-path arp

net/arp/arp.h

@@ -36,14 +36,76 @@
 #ifndef __NET_ARP_ARP_H
 #define __NET_ARP_ARP_H
 
+/* The Address Resolution Protocol ARP is used for mapping between IP
+ * addresses and link level addresses such as the Ethernet MAC
+ * addresses. ARP uses broadcast queries to ask for the link level
+ * address of a known IP address and the host which is configured with
+ * the IP address for which the query was meant, will respond with its
+ * link level address.
+ *
+ * Note: This ARP implementation only supports Ethernet.
+ */
+
 /****************************************************************************
  * Included Files
  ****************************************************************************/
 
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+/* Configuration ************************************************************/
+
+#ifndef CONFIG_DEBUG
+#  undef CONFIG_NET_ARP_DUMP
+#endif
+
+/* ARP Definitions **********************************************************/
+
+#define ARP_REQUEST    1
+#define ARP_REPLY      2
+
+#define ARP_HWTYPE_ETH 1
+
+#define RASIZE         4  /* Size of ROUTER ALERT */
+
 /****************************************************************************
  * Public Types
  ****************************************************************************/
 
+/* ARP header -- Size 28 bytes */
+
+struct arp_hdr_s
+{
+  uint16_t ah_hwtype;        /* 16-bit Hardware type (Ethernet=0x001) */
+  uint16_t ah_protocol;      /* 16-bit Protocol type (IP=0x0800) */
+  uint8_t  ah_hwlen;         /*  8-bit Hardware address size (6) */
+  uint8_t  ah_protolen;      /*  8-bit Procotol address size (4) */
+  uint16_t ah_opcode;        /* 16-bit Operation */
+  uint8_t  ah_shwaddr[6];    /* 48-bit Sender hardware address */
+  uint16_t ah_sipaddr[2];    /* 32-bit Sender IP adress */
+  uint8_t  ah_dhwaddr[6];    /* 48-bit Target hardware address */
+  uint16_t ah_dipaddr[2];    /* 32-bit Target IP address */
+};
+
+/* IP header -- Size 20 or 24 bytes */
+
+struct arp_iphdr_s
+{
+  uint8_t  eh_vhl;           /*  8-bit Version (4) and header length (5 or 6) */
+  uint8_t  eh_tos;           /*  8-bit Type of service (e.g., 6=TCP) */
+  uint8_t  eh_len[2];        /* 16-bit Total length */
+  uint8_t  eh_ipid[2];       /* 16-bit Identification */
+  uint8_t  eh_ipoffset[2];   /* 16-bit IP flags + fragment offset */
+  uint8_t  eh_ttl;           /*  8-bit Time to Live */
+  uint8_t  eh_proto;         /*  8-bit Protocol */
+  uint16_t eh_ipchksum;      /* 16-bit Header checksum */
+  uint16_t eh_srcipaddr[2];  /* 32-bit Source IP address */
+  uint16_t eh_destipaddr[2]; /* 32-bit Destination IP address */
+  uint16_t eh_ipoption[2];   /* (optional) */
+};
+
 /****************************************************************************
  * Public Function Prototypes
  ****************************************************************************/
@@ -92,6 +154,26 @@ void arp_timer_initialize(void);
 
 void arp_timer(void);
 
+/****************************************************************************
+ * Name: arp_dump
+ *
+ * Description:
+ *   Dump the contents of an ARP packet to the SYSLOG device
+ *
+ * Input Parameters:
+ *   arp - A reference to the ARP header to be dumped.
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_NET_ARP_DUMP
+void arp_dump(FAR struct arp_hdr_s *arp);
+#else
+# define arp_dump(arp)
+#endif
+
 #else /* CONFIG_NET_ARP */
 
 /* If ARP is disabled, stub out all ARP interfaces */
@@ -99,6 +181,7 @@ void arp_timer(void);
 # define arp_reset()
 # define arp_timer_initialize(void)
 # define arp_timer()
+# define arp_dump(arp)
 
 #endif /* CONFIG_NET_ARP */
-#endif /* __UIP-NEIGHBOR_H__ */
+#endif /* __NET_ARP_ARP_H */

net/arp/arp_dump.c

+/****************************************************************************
+ * net/arp/arp_dump.c
+ *
+ *   Copyright (C) 2007-2011, 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Based on uIP which also has a BSD style license:
+ *
+ *   Author: Adam Dunkels <adam@dunkels.com>
+ *   Copyright (c) 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>
+
+#include <debug.h>
+
+#include "arp/arp.h"
+
+#ifdef CONFIG_NET_ARP_DUMP
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: arp_dump
+ *
+ * Description:
+ *   Dump the contents of an ARP packet to the SYSLOG device
+ *
+ * Input Parameters:
+ *   arp - A reference to the ARP header to be dumped.
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+void arp_dump(FAR struct arp_hdr_s *arp)
+{
+  nlldbg("  HW type: %04x Protocol: %04x\n",
+         arp->ah_hwtype, arp->ah_protocol);\
+  nlldbg("  HW len: %02x Proto len: %02x Operation: %04x\n",
+         arp->ah_hwlen, arp->ah_protolen, arp->ah_opcode);
+  nlldbg("  Sender MAC: %02x:%02x:%02x:%02x:%02x:%02x IP: %d.%d.%d.%d\n",
+         arp->ah_shwaddr[0], arp->ah_shwaddr[1], arp->ah_shwaddr[2],
+         arp->ah_shwaddr[3], arp->ah_shwaddr[4], arp->ah_shwaddr[5],
+         arp->ah_sipaddr[0] & 0xff, arp->ah_sipaddr[0] >> 8,
+         arp->ah_sipaddr[1] & 0xff, arp->ah_sipaddr[1] >> 8);
+  nlldbg("  Dest MAC:   %02x:%02x:%02x:%02x:%02x:%02x IP: %d.%d.%d.%d\n",
+         arp->ah_dhwaddr[0], arp->ah_dhwaddr[1], arp->ah_dhwaddr[2],
+         arp->ah_dhwaddr[3], arp->ah_dhwaddr[4], arp->ah_dhwaddr[5],
+         arp->ah_dipaddr[0] & 0xff, arp->ah_dipaddr[0] >> 8,
+         arp->ah_dipaddr[1] & 0xff, arp->ah_dipaddr[1] >> 8);
+}
+
+#endif /* CONFIG_NET_ARP_DUMP */

net/arp/arp_inout.c

 /****************************************************************************
- * net/arp/arm_inout.c
+ * net/arp/arp_inout.c
  * Implementation of the ARP Address Resolution Protocol.
  *
  *   Copyright (C) 2007-2011, 2014 Gregory Nutt. All rights reserved.
@@ -38,16 +38,6 @@
  *
  ****************************************************************************/
 
-/* The Address Resolution Protocol ARP is used for mapping between IP
- * addresses and link level addresses such as the Ethernet MAC
- * addresses. ARP uses broadcast queries to ask for the link level
- * address of a known IP address and the host which is configured with
- * the IP address for which the query was meant, will respond with its
- * link level address.
- *
- * Note: This ARP implementation only supports Ethernet.
- */
-
 /****************************************************************************
  * Included Files
  ****************************************************************************/
@@ -79,13 +69,6 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
-#define ARP_REQUEST    1
-#define ARP_REPLY      2
-
-#define ARP_HWTYPE_ETH 1
-
-#define RASIZE         4  /* Size of ROUTER ALERT */
-
 #define ETHBUF        ((struct eth_hdr_s *)&dev->d_buf[0])
 #define ARPBUF        ((struct arp_hdr_s *)&dev->d_buf[NET_LL_HDRLEN])
 #define IPBUF         ((struct arp_iphdr_s *)&dev->d_buf[NET_LL_HDRLEN])
@@ -94,38 +77,6 @@
  * Private Types
  ****************************************************************************/
 
-/* ARP header -- Size 28 bytes */
-
-struct arp_hdr_s
-{
-  uint16_t ah_hwtype;        /* 16-bit Hardware type (Ethernet=0x001) */
-  uint16_t ah_protocol;      /* 16-bit Protocol type (IP=0x0800) */
-  uint8_t  ah_hwlen;         /*  8-bit Hardware address size (6) */
-  uint8_t  ah_protolen;      /*  8-bit Procotol address size (4) */
-  uint16_t ah_opcode;        /* 16-bit Operation */
-  uint8_t  ah_shwaddr[6];    /* 48-bit Sender hardware address */
-  uint16_t ah_sipaddr[2];    /* 32-bit Sender IP adress */
-  uint8_t  ah_dhwaddr[6];    /* 48-bit Target hardware address */
-  uint16_t ah_dipaddr[2];    /* 32-bit Target IP address */
-};
-
-/* IP header -- Size 20 or 24 bytes */
-
-struct arp_iphdr_s
-{
-  uint8_t  eh_vhl;           /*  8-bit Version (4) and header length (5 or 6) */
-  uint8_t  eh_tos;           /*  8-bit Type of service (e.g., 6=TCP) */
-  uint8_t  eh_len[2];        /* 16-bit Total length */
-  uint8_t  eh_ipid[2];       /* 16-bit Identification */
-  uint8_t  eh_ipoffset[2];   /* 16-bit IP flags + fragment offset */
-  uint8_t  eh_ttl;           /*  8-bit Time to Live */
-  uint8_t  eh_proto;         /*  8-bit Protocol */
-  uint16_t eh_ipchksum;      /* 16-bit Header checksum */
-  uint16_t eh_srcipaddr[2];  /* 32-bit Source IP address */
-  uint16_t eh_destipaddr[2]; /* 32-bit Destination IP address */
-  uint16_t eh_ipoption[2];   /* (optional) */
-};
-
 /****************************************************************************
  * Private Data
  ****************************************************************************/
@@ -160,28 +111,6 @@ static const uint8_t g_multicast_ethaddr[3] = {0x01, 0x00, 0x5e};
  * Private Functions
  ****************************************************************************/
 
-#if defined(CONFIG_NET_DUMPARP) && defined(CONFIG_DEBUG)
-static void arp_dump(FAR struct arp_hdr_s *arp)
-{
-  nlldbg("  HW type: %04x Protocol: %04x\n",
-         arp->ah_hwtype, arp->ah_protocol);\
-  nlldbg("  HW len: %02x Proto len: %02x Operation: %04x\n",
-         arp->ah_hwlen, arp->ah_protolen, arp->ah_opcode);
-  nlldbg("  Sender MAC: %02x:%02x:%02x:%02x:%02x:%02x IP: %d.%d.%d.%d\n",
-         arp->ah_shwaddr[0], arp->ah_shwaddr[1], arp->ah_shwaddr[2],
-         arp->ah_shwaddr[3], arp->ah_shwaddr[4], arp->ah_shwaddr[5],
-         arp->ah_sipaddr[0] & 0xff, arp->ah_sipaddr[0] >> 8,
-         arp->ah_sipaddr[1] & 0xff, arp->ah_sipaddr[1] >> 8);
-  nlldbg("  Dest MAC:   %02x:%02x:%02x:%02x:%02x:%02x IP: %d.%d.%d.%d\n",
-         arp->ah_dhwaddr[0], arp->ah_dhwaddr[1], arp->ah_dhwaddr[2],
-         arp->ah_dhwaddr[3], arp->ah_dhwaddr[4], arp->ah_dhwaddr[5],
-         arp->ah_dipaddr[0] & 0xff, arp->ah_dipaddr[0] >> 8,
-         arp->ah_dipaddr[1] & 0xff, arp->ah_dipaddr[1] >> 8);
-}
-#else
-# define arp_dump(arp)
-#endif
-
 /****************************************************************************
  * Public Functions
  ****************************************************************************/