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@0:d494b853ce97, 2010-10-12 (annotated)

Committer:
etherealflaim
Date:
Tue Oct 12 05:32:59 2010 +0000
Revision:
0:d494b853ce97
Child:
1:63d4ff534d65
Initial Publish - Slightly unfinished, but usable

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 0:d494b853ce97 6 #define ETHERTYPE_ARP 0x0806
etherealflaim 0:d494b853ce97 7 typedef struct {
etherealflaim 0:d494b853ce97 8 u16 hardware_type; // 0x0001 for ethernet
etherealflaim 0:d494b853ce97 9 u16 protocol_type; // 0x0800 for IPv4
etherealflaim 0:d494b853ce97 10 u8 hardware_length; // Bytes. Ethernet is 6
etherealflaim 0:d494b853ce97 11 u8 protocol_length; // Bytes. IPv4 is 4
etherealflaim 0:d494b853ce97 12 u16 operation; // Operation. 1 for request, 2 for reply or announce
etherealflaim 0:d494b853ce97 13 // The following are only valid for IPv4 over Ethernet
etherealflaim 0:d494b853ce97 14 u8 sender_hardware_address[6]; // Generator of the request or reply
etherealflaim 0:d494b853ce97 15 u8 sender_protocol_address[4]; // All zeroes for an ARP probe
etherealflaim 0:d494b853ce97 16 u8 target_hardware_address[6]; // Announce - same as SHA
etherealflaim 0:d494b853ce97 17 u8 target_protocol_address[4]; // Announce - Same as TPA
etherealflaim 0:d494b853ce97 18 } ARP_Packet;
etherealflaim 0:d494b853ce97 19
etherealflaim 0:d494b853ce97 20 inline void fix_endian_arp(ARP_Packet *packet)
etherealflaim 0:d494b853ce97 21 {
etherealflaim 0:d494b853ce97 22 fix_endian_u16(&packet->hardware_type);
etherealflaim 0:d494b853ce97 23 fix_endian_u16(&packet->protocol_type);
etherealflaim 0:d494b853ce97 24 fix_endian_u16(&packet->operation);
etherealflaim 0:d494b853ce97 25 }
etherealflaim 0:d494b853ce97 26
etherealflaim 0:d494b853ce97 27 inline void print_arp(ARP_Packet *packet)
etherealflaim 0:d494b853ce97 28 {
etherealflaim 0:d494b853ce97 29 main_log.printf("ARP Packet:");
etherealflaim 0:d494b853ce97 30 main_log.printf(" Hardware: 0x%04X", packet->hardware_type);
etherealflaim 0:d494b853ce97 31 main_log.printf(" Protocol: 0x%04X", packet->protocol_type);
etherealflaim 0:d494b853ce97 32 main_log.printf(" Type: %d", packet->operation);
etherealflaim 0:d494b853ce97 33 if (packet->hardware_type != 0x0001 || packet->protocol_type != 0x0800) return;
etherealflaim 0:d494b853ce97 34
etherealflaim 0:d494b853ce97 35 u8 *bytes;
etherealflaim 0:d494b853ce97 36 bytes = packet->sender_hardware_address;
etherealflaim 0:d494b853ce97 37 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 38 bytes = packet->target_hardware_address;
etherealflaim 0:d494b853ce97 39 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 40 bytes = packet->sender_protocol_address;
etherealflaim 0:d494b853ce97 41 main_log.printf(" Source: IP - %03d.%03d.%03d.%03d", bytes[0], bytes[1], bytes[2], bytes[3]);
etherealflaim 0:d494b853ce97 42 bytes = packet->target_protocol_address;
etherealflaim 0:d494b853ce97 43 main_log.printf(" Target: IP - %03d.%03d.%03d.%03d", bytes[0], bytes[1], bytes[2], bytes[3]);
etherealflaim 0:d494b853ce97 44 }
etherealflaim 0:d494b853ce97 45
etherealflaim 0:d494b853ce97 46 #endif