这段代码不知道哪里出了问题，求大神指点下。
#include <stdio.h>#include <iostream.h>
#include <Winsock2.h>
#include <ws2tcpip.h>
#pragma comment (lib,"Ws2_32.lib")
#define BUFFER_SIZE 65535
#define IO_RCVALL _WSAIOW(IOC_VENDOR,1)
typedef struct IP_HEAD //定义IP头
{
union
{
unsigned char Version; //版本（前4位）
unsigned char HeadLen; //报头标长（后4位），IP头长度
};
unsigned char ServiceType; //服务类型
unsigned short TotalLen; //数据报总长
unsigned short Identifier; //标识
union
{
unsigned short Flags; //标识（前3位）
unsigned short FragOffset; //分段偏移（后13位）
};
unsigned char TimeToLive; //生存周期
unsigned char Protocol; //协议
unsigned short HeadChecksum; //头校验和
unsigned int SourceAddr; //源地址
unsigned int DestinAddr; //目地地址
unsigned char Options; //选项
}IP_HEAD;
char * parseServiceType_getProcedence(BYTE b)
{
switch(b>>5) //获取服务类型字段中优先级子域
{
case 7:
return "Network Control"; //网络控制
break;
case 6:
return "Internet work Control"; //网络控制
break;
case 5:
return "CRITIC/ECP";
break;
case 4:
return "Flash Override"; //最优先信号
break;
case 3:
return "Flsah";
break;
case 2:
return "Immediate";
break;
case 1:
return "Priority"; //协议
break;
case 0:
return "Routine"; //路由
break;
default:
return "Unknow";
break;
}
}
char * parseServiceType_getTOS(BYTE b)
{
b=(b>>1)&0x0f; //获取服务类型字段中的TOS子域
switch(b)
{
case 0:
return "Normal service"; //正常运行
break;
case 1:
return "Minimize monetary cost"; //成本
break;
case 2:
return "Maximize reliability"; //可靠性
break;
case 4:
return "Maximize throughput"; //吞吐量
break;
case 8:
return "Minimize delay"; //延迟
break;
case 15:
return "Maximize security"; //安全性
break;
default:
return "Unknow";
}
}
char * getProtocol(BYTE Protocol) //获取协议字段共8位
{
switch(Protocol) //以下为协议号说明：
{
case 1:
return "ICMP"; //Internet控制报文协议
case 2:
return "IGMP"; //Internet组管理协议
case 4:
return "IP in IP"; //移动IP数据封装和隧道
case 6:
return "TCP"; //传输控制协议
case 8:
return "EGP"; //外部网关协议
case 17:
return "UDP"; //用户数据报文协议
case 41:
return "IPv6";
case 46:
return "RSVP"; //资源预留协议
case 89:
return "OSPF"; //Open Shortest Path First 开发式最短路径优先
default:
return "UNKNOW";
}
}
void ipparse(FILE* file,char* buffer)
{
IP_HEAD ip=*(IP_HEAD*)buffer; //通过指针把缓冲区的内容强制转化为IP_HEADER数据结构
fseek(file,0,SEEK_END);
fprintf(file,"版本号=%d\r\n",ip.Version>>4);
fprintf(file,"报头标长= %d (BYTE)\r\n",((ip.HeadLen & 0x0f)*4));
fprintf(file,"服务器类型 = %s,%s\r\n",parseServiceType_getProcedence(ip.ServiceType),
parseServiceType_getTOS(ip.ServiceType));
fprintf(file,"总长度 = %d(BYTE)\r\n",ip.TotalLen);
fprintf(file,"标识 = %d\r\n",ip.Identifier);
fprintf(file,"标志位 DF=%d , MF=%d\r\n",((ip.Flags>>14)&0x01),((ip.Flags>>13)&0x01));
fprintf(file,"分段偏移值 = %d\r\n",(ip.FragOffset&0x1fff));
fprintf(file,"生存期 = %d (hops)\r\n",ip.TimeToLive);
fprintf(file,"协议 = %s\r\n",getProtocol(ip.Protocol));
fprintf(file,"头校验和 = 0x%0x\r\n",ip.HeadChecksum);
fprintf(file,"源IP地址 = %s\r\n",inet_ntoa(*(in_addr*)&ip.SourceAddr));
fprintf(file,"目的IP地址 = %s\r\n",inet_ntoa(*(in_addr*)&ip.DestinAddr));
fprintf(file,"---------------------------------------------\r\n");
}
int main()
{
FILE * file;
if((file=fopen("history.txt","wb+"))==NULL)
{
printf("fail to open file %s");
return -1;
}
unsigned char rv;
WSADATA WSAData; //定义了能够储存WSAStarup调用返回值的结构
rv=MAKEWORD(2,2); //Winsock2版本
WSAStartup(rv,&WSAData);
SOCKET sock=socket(AF_INET,SOCK_RAW,IPPROTO_IP); //创建套接字，sock为套接字描述符
BOOL flag=true;
setsockopt(sock,IPPROTO_IP,IP_HDRINCL,(CHAR*)&flag,sizeof(flag));//任意类型、任意状态套接口的设置选项值
char hostName[128];
gethostname(hostName,100); //获取主机名
hostent * pHostIP; //获取本地IP地址
pHostIP = gethostbyname(hostName);
sockaddr_in addr_in;
addr_in.sin_addr=*(in_addr *)pHostIP->h_addr_list[0];
addr_in.sin_family = AF_INET;
addr_in.sin_port = htons(6000); //将无符号短整型主机数据转换为网络字节顺序数据
bind(sock,(PSOCKADDR)&addr_in,sizeof(addr_in));
DWORD dwBufferLen[10]; //设置网卡为混杂模式
DWORD dwBufferInLen=1;
DWORD dwBytesReturned=0;
WSAIoctl(sock, IO_RCVALL,&dwBufferInLen,sizeof(dwBufferInLen),
&dwBufferLen,sizeof(dwBufferLen),&dwBytesReturned,NULL,NULL);
char buffer[BUFFER_SIZE]; //设置缓冲区
char i,a;
printf("数据包捕捉和解析程序正在启动\n");
for(a=1;a<=10;a++)
{
printf("...");
Sleep(300);
}
printf("\n\n确定要接收并解析本机的数据包吗？ Y/N \n");
scanf("%c",&i);
system("cls");
while(i=='Y'||i=='y')
{
int size=recv(sock,buffer,BUFFER_SIZE,0); //接收数据包
if (size>0)
{
printf("\n\n数据包捕获解析程序\n");
printf("---------------------------------------------\n");
ipparse(stdout,buffer);
ipparse(file,buffer);
printf("是否要继续接收并解析本机的数据包？ Y/N \n");
fflush(stdin);
scanf("%c",&i);
continue;
}
else
fclose(file);
return 0;
}
closesocket(sock);
}
