IP解析数据包，编译，组建没有错误，就是执行结果只显示开始解析本机的IP数据包，怎么回事，求助
#include<stdio.h>#include<winsock2.h>
#include<ws2tcpip.h>
#include<iostream.h>
#pragma comment(lib,"ws2_32.lib")
//定义IP头部结构
#define IO_RCVALL _WSAIOW (IOC_VENDOR,1)
#define BUFFER_SIZE 65535
typedef struct _IP_HEADER //定义IP头部数据结构
{
union
{
BYTE Version; //版本（前4位）
BYTE HdrLen; //IP头部长度（后4位）
};
BYTE ServiceType; // 服务类型
WORD TotalLen; // 总长度
WORD ID; // 标识
union
{
WORD Flags; // 标志（前3位）
WORD FragOff; // 分段偏移（后13位）
};
BYTE TimeToLive; // 生命期
BYTE Protocol; // 协议
WORD HdrChksum; //头校验和
DWORD SrcAddr; // 源地址
DWORD DstAddr; // 目的地址
BYTE Options; // 选项
} IP_HEADER;
//解析IP包的版本信息
void getVersion(BYTE b,BYTE &version)
{
version=b>>4;
}
//解析IP包的头部长度
void getIHL(BYTE b,BYTE &result)
{
result=(b&0x0f)*4;
}
//解析IP包的服务类型
char* parseServiceType_getProcedence(BYTE b)
{
switch(b>>5)
{
case 7:
return "Network Control";
break;
case 6:
return "Internet work Control";
break;
case 5:
return "CRITIC/ECP";
break;
case 4:
return "Flash Override";
break;
case 3:
return "Flash";
break;
case 2:
return "Immediate";
break;
case 1:
return "Priority";
break;
case 0:
return "Routine";
break;
default:
return "Unknown";
}
}
//解析IP包的服务级别
char* parseServiceType_getTOS(BYTE b)
{
b = (b >> 1)&0x0f;
switch(b)
{
case 0:
return "Normal service";
break;
case 1:
return "Minimize monetary cost";
break;
case 2:
return "Maximize reliability";
break;
case 4:
return "Maximize thoughput";
break;
case 8:
return "Minimize delay";
break;
case 15:
return "Maximize security";
break;
default:
return "Unknown";
}
}
//解析IP包的标志位
void getFlags(WORD w,BYTE &DF,BYTE &MF)
{
DF = (w >> 14)&0x01;
MF = (w >> 13)&0x01;
}
//解析IP包的分段偏移
void getFragOff(WORD w,WORD &fragOff)
{
fragOff = w&0x1fff;
}
//解析IP包的协议类型
char* getProtocol (BYTE Protocol)
{
switch (Protocol)
{
case 1:
return "ICMP";
case 2:
return "IGMP";
case 4:
return "IP in IP";
case 6:
return "TCP";
case 8:
return "EGP";
case 17:
return "UDP";
case 41:
return "IPv6";
case 46:
return "RSVP";
case 89:
return "OSPF";
default:
return "UNKNOWN";
}
}
//解析IP数据包
void ipparse(FILE* file,char* buffer)
{
IP_HEADER ip=*(IP_HEADER*)buffer;
fseek(file,0,SEEK_END);
BYTE version;
getVersion(ip.Version,version);
fprintf(file,"版本号=%d\r\n",version);
BYTE headerLen;
getIHL(ip.HdrLen,headerLen);
fprintf(file,"报头标长=%d(BYTE)\r\n",headerLen);
fprintf(file,"服务类型=%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.ID);
BYTE DF,MF;
getFlags(ip.Flags,DF,MF);
fprintf(file,"标志 DF=%d,MF=%d\r\n",DF,MF);
WORD fragOff;
getFragOff(ip.FragOff,fragOff);
fprintf(file,"分段偏移值=%d\r\n",fragOff);
fprintf(file,"生存期=%d（hopes)\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.HdrChksum);
fprintf(file,"源IP地址=%s\r\n",inet_ntoa(*(in_addr*)&ip.SrcAddr));
fprintf(file,"目的IP地址=%s\r\n",inet_ntoa(*(in_addr*)&ip.DstAddr));
fprintf(file,"---------------------------------------------\r\n");
}
//主程序开始
main()
{
int nRetCode = 0;
{
FILE * file;
if((file=fopen("d:\\a.txt","wb+"))==NULL)
{
printf("fail to open file %s");
return -1;
}
WSADATA wsData;/* 启动2.2版本的Socket，并将Socket版本信息保存到wsData中 */
WSAStartup(MAKEWORD(2,2),&wsData);
SOCKET sock;/* 创建原始套接字 */
sock=socket(AF_INET,SOCK_RAW,IPPROTO_IP);
BOOL flag=TRUE;/* 设置IP头操作选项 */
setsockopt(sock,IPPROTO_IP,IP_HDRINCL,(char*)&flag,sizeof(flag));
char hostName[128];/* 获取本地主机名 */
gethostname(hostName,100);
hostent * pHostIP;/* 根据主机名获取主机信息 */
pHostIP=gethostbyname(hostName); /* 封装IP地址信息 */
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);
bind(sock,(PSOCKADDR)&addr_in,sizeof(addr_in));
DWORD dwValue=1;
#define IO_RCVALL _WSAIOW(IOC_VENDOR,1)
DWORD dwBufferLen[10];
DWORD dwBufferInLen=1;
DWORD dwBytesReturned=0;
WSAIoctl(sock,IO_RCVALL,&dwBufferInLen,sizeof(dwBufferInLen),
&dwBufferLen,sizeof(dwBufferLen),&dwBytesReturned,NULL,NULL);
#define BUFFER_SIZE 65535
char buffer[BUFFER_SIZE];
printf("开始解析经过本机的IP数据包:\n");
while(true)
{
/* 从套接字接收IP数据报 */
int size=recv(sock,buffer,BUFFER_SIZE,0);
if (size>0)
{
ipparse(stdout,buffer);
ipparse(file,buffer);
}
}
//关闭文件
fclose(file);
return 0;
}
return nRetCode;
}
