//ArpCheat.h

#ifndef MY_ARP_CHEAT_INCLUDE_H
#define MY_ARP_CHEAT_INCLUDE_H

//字节对齐必须是1
#pragma pack (1)
struct ethernet_head
{
unsigned char dest_mac[6]; //目标主机MAC地址
unsigned char source_mac[6]; //源端MAC地址
unsigned short eh_type; //以太网类型
};

struct arp_head
{
unsigned short hardware_type; //硬件类型：以太网接口类型为1
unsigned short protocol_type; //协议类型：IP协议类型为0X0800
unsigned char add_len; //硬件地址长度：MAC地址长度为6B
unsigned char pro_len; //协议地址长度：IP地址长度为4B
unsigned short option; //操作：ARP请求为1，ARP应答为2
unsigned char sour_addr[6]; //源MAC地址：发送方的MAC地址
unsigned long sour_ip; //源IP地址：发送方的IP地址
unsigned char dest_addr[6]; //目的MAC地址：ARP请求中该字段没有意义；ARP响应中为接收方的MAC地址
unsigned long dest_ip; //目的IP地址：ARP请求中为请求解析的IP地址；ARP响应中为接收方的IP地址
unsigned char padding[18];
};

struct arp_packet //最终arp包结构
{
ethernet_head eth; //以太网头部
arp_head arp; //arp数据包头部
};
#pragma pack ()
/**
* 获得网卡的MAC地址
* pDevName 网卡的设备名称
*/
unsigned char* GetSelfMac(char* pDevName);
/**
* 封装ARP请求包
* source_mac 源MAC地址
* srcIP 源IP
* destIP 目的IP
*/
unsigned char* BuildArpPacket(unsigned char* source_mac,

unsigned long srcIP, unsigned long destIP);

#endif