icmp.h

此文档为采用FPGA实现的以太网MAC层

#ifndef _ICMP_H
#define _ICMP_H

#include "sys.h"

typedef struct
{
    Uint8 type;
    Uint8 code;
    Uint16 checksum;
    Uint16 ident;
    Uint16 sequence;
}
ICMPHEADER;

#define ICMP_SIZE sizeof(ICMPHEADER)
#define ICMP_OFFSET ETH_SIZE+IP_SIZE
#define ICMP_DATA_OFFSET ICMP_OFFSET+ICMP_SIZE

#define ICMP_PING 0x8
#define ICMP_ECHO 0x0

void icmp_process(ICMPHEADER *packet,Uint16 data_len, Uint16 src_ip_h, Uint16 src_ip_l);
void icmp_handler(ICMPHEADER *packet,Uint16 data_len, Uint16 src_ip_h, Uint16 src_ip_l);

#endif