/* The IP header */
typedef struct iphdr {
unsigned int h_len:4; //4位首部长度
unsigned int version:4; //IP版本号，4表示IPV4
unsigned char tos; //8位服务类型TOS
unsigned short total_len; //16位总长度（字节）
unsigned short ident; //16位标识
unsigned short frag_and_flags; //3位标志位
unsigned char ttl; //8位生存时间 TTL
unsigned char proto; //8位协议 (TCP, UDP 或其他)
unsigned short checksum; //16位IP首部校验和
unsigned int sourceIP; //32位源IP地址
unsigned int destIP; //32位目的IP地址
}IpHeader;
//定义ICMP首部
typedef struct _ihdr
{
BYTE i_type; //8位类型
BYTE i_code; //8位代码
USHORT i_cksum; //16位校验和
USHORT i_id; //识别号（一般用进程号作为识别号）
USHORT i_seq; //报文序列号
ULONG timestamp; //时间戳
}IcmpHeader;
#define STATUS_FAILED 0xFFFF
#define DEF_PACKET_SIZE 640
#define MAX_PACKET 6500
#define xmalloc(s) HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,(s))
#define xfree(p) HeapFree (GetProcessHeap(),0,(p))
void fill_icmp_data(char *, int);
USHORT checksum(USHORT *, int);
void decode_resp(char *,int ,struct sockaddr_in *);
int main(int argc, char **argv){
WSADATA wsaData;
SOCKET sockRaw = (SOCKET)NULL;
struct sockaddr_in dest,from;
struct hostent * hp;
int bread,datasize,retval;
int fromlen = sizeof(from);
int timeout = 1000;
char *icmp_data;
char *recvbuf;
unsigned int addr=0;
USHORT seq_no = 0;
if ((retval = WSAStartup(MAKEWORD(2,1),&wsaData)) != 0){
fprintf(stderr,"WSAStartup failed: %d\n",retval);
ExitProcess(STATUS_FAILED);
}
sockRaw = WSASocket (AF_INET,SOCK_RAW,IPPROTO_ICMP,NULL,0,WSA_FLAG_OVERLAPPED);
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