Kyle Lemons / Mbed 2 deprecated NetTool

This is a low-level network debugging utility that utilizes raw packet i/o to construct and deconstruct tcp, udp, ipv4, arp, and icmp packets over ethernet.

Dependencies:   mbed

net/arp.h@8:1c1f6ce348c6, 2010-10-12 (annotated)

Committer:
etherealflaim
Date:
Tue Oct 12 06:48:59 2010 +0000
Revision:
8:1c1f6ce348c6
Parent:
5:c56386b9fc33 
Documentation

Who changed what in which revision?

UserRevisionLine numberNew contents of line
etherealflaim 0:d494b853ce97 1 #ifndef ARP_H
etherealflaim 0:d494b853ce97 2 #define ARP_H
etherealflaim 0:d494b853ce97 3
etherealflaim 0:d494b853ce97 4 #include "net.h"
etherealflaim 0:d494b853ce97 5
etherealflaim 5:c56386b9fc33 6 /**
etherealflaim 5:c56386b9fc33 7 \file
etherealflaim 5:c56386b9fc33 8 \brief ARP packet
etherealflaim 5:c56386b9fc33 9
etherealflaim 5:c56386b9fc33 10 This file contains the memory map and associated functions for ARP packet
etherealflaim 5:c56386b9fc33 11 creation and deconstruction.
etherealflaim 5:c56386b9fc33 12 */
etherealflaim 5:c56386b9fc33 13
etherealflaim 0:d494b853ce97 14 #define ETHERTYPE_ARP 0x0806
etherealflaim 1:63d4ff534d65 15
etherealflaim 3:c32d9660b888 16 /// ARP Packet memory map
etherealflaim 0:d494b853ce97 17 typedef struct {
etherealflaim 1:63d4ff534d65 18 u16 hardware_type; ///< 0x0001 for ethernet
etherealflaim 1:63d4ff534d65 19 u16 protocol_type; ///< 0x0800 for IPv4
etherealflaim 1:63d4ff534d65 20 u8 hardware_length; ///< Bytes. Ethernet is 6
etherealflaim 1:63d4ff534d65 21 u8 protocol_length; ///< Bytes. IPv4 is 4
etherealflaim 1:63d4ff534d65 22 u16 operation; ///< Operation. 1 for request, 2 for reply or announce
etherealflaim 0:d494b853ce97 23 // The following are only valid for IPv4 over Ethernet
etherealflaim 1:63d4ff534d65 24 u8 sender_hardware_address[6]; ///< Generator of the request or reply
etherealflaim 1:63d4ff534d65 25 u8 sender_protocol_address[4]; ///< All zeroes for an ARP probe
etherealflaim 1:63d4ff534d65 26 u8 target_hardware_address[6]; ///< Announce - same as SHA
etherealflaim 1:63d4ff534d65 27 u8 target_protocol_address[4]; ///< Announce - Same as TPA
etherealflaim 0:d494b853ce97 28 } ARP_Packet;
etherealflaim 0:d494b853ce97 29
etherealflaim 2:e8e09adc41fc 30 /// Convert from wire to host or host to wire endianness
etherealflaim 0:d494b853ce97 31 inline void fix_endian_arp(ARP_Packet *packet)
etherealflaim 0:d494b853ce97 32 {
etherealflaim 0:d494b853ce97 33 fix_endian_u16(&packet->hardware_type);
etherealflaim 0:d494b853ce97 34 fix_endian_u16(&packet->protocol_type);
etherealflaim 0:d494b853ce97 35 fix_endian_u16(&packet->operation);
etherealflaim 0:d494b853ce97 36 }
etherealflaim 0:d494b853ce97 37
etherealflaim 2:e8e09adc41fc 38 /// Print the ARP packet
etherealflaim 0:d494b853ce97 39 inline void print_arp(ARP_Packet *packet)
etherealflaim 0:d494b853ce97 40 {
etherealflaim 0:d494b853ce97 41 main_log.printf("ARP Packet:");
etherealflaim 0:d494b853ce97 42 main_log.printf(" Hardware: 0x%04X", packet->hardware_type);
etherealflaim 0:d494b853ce97 43 main_log.printf(" Protocol: 0x%04X", packet->protocol_type);
etherealflaim 0:d494b853ce97 44 main_log.printf(" Type: %d", packet->operation);
etherealflaim 0:d494b853ce97 45 if (packet->hardware_type != 0x0001 || packet->protocol_type != 0x0800) return;
etherealflaim 0:d494b853ce97 46
etherealflaim 0:d494b853ce97 47 u8 *bytes;
etherealflaim 0:d494b853ce97 48 bytes = packet->sender_hardware_address;
etherealflaim 0:d494b853ce97 49 main_log.printf(" Source: MAC - %02X:%02X:%02X:%02X:%02X:%02X", bytes[0],bytes[1],bytes[2],bytes[3],bytes[4],bytes[5]);
etherealflaim 0:d494b853ce97 50 bytes = packet->target_hardware_address;
etherealflaim 0:d494b853ce97 51 main_log.printf(" Target: MAC - %02X:%02X:%02X:%02X:%02X:%02X", bytes[0],bytes[1],bytes[2],bytes[3],bytes[4],bytes[5]);
etherealflaim 0:d494b853ce97 52 bytes = packet->sender_protocol_address;
etherealflaim 0:d494b853ce97 53 main_log.printf(" Source: IP - %03d.%03d.%03d.%03d", bytes[0], bytes[1], bytes[2], bytes[3]);
etherealflaim 0:d494b853ce97 54 bytes = packet->target_protocol_address;
etherealflaim 0:d494b853ce97 55 main_log.printf(" Target: IP - %03d.%03d.%03d.%03d", bytes[0], bytes[1], bytes[2], bytes[3]);
etherealflaim 0:d494b853ce97 56 }
etherealflaim 0:d494b853ce97 57
etherealflaim 0:d494b853ce97 58 #endif