/*

* Definitions for ICMP protocol implementation

*/

////

// Constants

////

#define ICMPV4_TYPE_ECHO_REPLY 0

#define ICMPV4_TYPE_UNREACHABLE 3

#define ICMPV4_TYPE_ECHO_REQUEST 8

#define ICMPV4_TYPE_TIME_EXCEEDED 11

#define ICMPV4_UNREACHABLE_CODE_NETWORK 0

#define ICMPV4_UNREACHABLE_CODE_MACHINE 1

#define ICMPV4_UNREACHABLE_CODE_PROTOCOL 2

#define ICMPV4_UNREACHABLE_CODE_PORT 3

#define ICMPV4_UNREACHABLE_CODE_FRAGMENT 4

#define ICMPV4_CODE_NONE 0

////

// Structures

////

#pragma pack(1)

typedef struct{

unsigned char type;

unsigned char code;

unsigned short int checksum;

unsigned char data[1];

} ICMPv4_fields;

#pragma pack()

////

// Prototypes

////

#ifdef VERBOSE

void displayICMPv4Packet(FILE *output,ICMPv4_fields *icmp,int size);

#endif

unsigned char icmpDecodePacket(EventsEvent *event,EventsSelector *selector);

unsigned char icmpSendPacket(EventsEvent *event,EventsSelector *selector);