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解析ip报文包的一个源代码 能生成日志文件

#include<iostream.h> 
#include<winsock2.h> 
#include<ws2tcpip.h> 
#pragma comment(lib,"ws2_32") 
#define IO_RCVALL _WSAIOW(IOC_VENDOR,1) 
typedef struct IP_HEAD 
{ 
union 
{ 
unsigned char Version; 
unsigned char HeadLen; 
}; 
unsigned char ServiceType; 
unsigned short TotalLen; 
unsigned short Identifier; 
union 
{ 
unsigned short Flags; 
unsigned short FragOffset; 
}; 
unsigned char TimeToLive; 
unsigned char Protocol; 
unsigned short HeadChecksum; 
unsigned int SourceAddr; 
unsigned int DestinAddr; 
unsigned char Options; 
}ip_head; 
void main(int argc,char *argv[]) 
{ 
if(argc!=2) 
{ 
cout<<endl<<"请以下格式输入命令行:PackParse packet_sum"<<endl; 
return; 
} 
WSADATA WSAData; 
if(WSAStartup(MAKEWORD(2,2), &WSAData)!=0) 
{ 
cout<<endl<<"WSASTartup初始化失败"<<endl; 
return; 
} 
SOCKET sock=socket(AF_INET,SOCK_RAW,IPPROTO_IP); 
if(sock==INVALID_SOCKET) 
{ 
cout<<endl<<"创建Socket失败!"<<endl; 
return; 
} 
bool flag=true; 
if(setsockopt(sock,IPPROTO_IP,IP_HDRINCL,(char *) &flag,sizeof(flag))==SOCKET_ERROR) 
{ 
cout<<endl<<"setsockopt操作失败"<<endl; 
return; 
} 
char hostName[128]; 
if(gethostname(hostName,100)==SOCKET_ERROR) 
{ 
cout<<endl<<"gethostname操作失败"<<endl; 
return; 
} 
hostent *pHostIP; 
if((pHostIP=gethostbyname(hostName))==NULL) 
{ 
cout<<endl<<"gethostbyname操作失败"<<endl; 
return; 
} 
sockaddr_in host_addr; 
host_addr.sin_family=AF_INET; 
host_addr.sin_port=htons(6000); 
host_addr.sin_addr=*(in_addr *)pHostIP->h_addr_list[0]; 
if(bind(sock,(PSOCKADDR)&host_addr,sizeof(host_addr))==SOCKET_ERROR) 
{ 
cout<<endl<<"bind操作失败"<<endl; 
return; 
} 
DWORD dwBufferLen[10]; 
DWORD dwBufferInLen=1; 
DWORD dwBytesReturned=0; 
if(WSAIoctl(sock , IO_RCVALL ,&dwBufferInLen , sizeof(dwBufferInLen) , &dwBufferLen,sizeof(dwBufferLen),&dwBytesReturned,NULL,NULL)==SOCKET_ERROR) 
{ 
cout<<endl<<"WSAIoctl操作失败"<<endl; 
return; 
} 
cout<<endl<<"开始解析IP包:"<<endl; 
char buffer[65535]; 
int packsum=atoi(argv[1]); 
for(int i=0;i<packsum;i++) 
{ 
if(recv(sock,buffer,65535,0)>0) 
{ 
ip_head ip=*(ip_head *)buffer; 
cout<<"-----------------------"<<endl; 
cout<<"版本:"<<(ip.Version>>4)<<endl; 
cout<<"头部长度:"<<((ip.HeadLen &0x0f)*4)<<endl; 
cout<<"服务类型:Priority"<<(ip.ServiceType>>5)<<",Service"<<((ip.ServiceType>>1)&0x0f)<<endl; 
cout<<"总长度:"<<ip.TotalLen<<endl; 
cout<<"标识符:"<<ip.Identifier<<endl; 
cout<<"标志位:"<<((ip.Flags>>15)&0x01)<<",DF="<<((ip.Flags>>14)&0x01)<<",Mf="<<((ip.Flags>>13)&0x01)<<endl; 
cout<<"片偏移:"<<(ip.FragOffset&0x1fff)<<endl; 
cout<<"生存周期:"<<(int)ip.TimeToLive<<endl; 
cout<<"协议:Protocol"<<(int)ip.Protocol<<endl; 
cout<<"头部校验和:"<<ip.HeadChecksum<<endl; 
cout<<"原地址:"<<inet_ntoa(*(in_addr *)&ip.SourceAddr)<<endl; 
cout<<"目的IP地址:"<<inet_ntoa(*(in_addr *)&ip.DestinAddr)<<endl; 
} 
} 
closesocket(sock); 
WSACleanup(); 
}
提问者： yujianjiang11 - 经理 五级 最佳答案
改了一个问题，其他没错 
另外，这里也不需要setsockopt 
#include<iostream> 
#include<winsock2.h> 
#include<ws2tcpip.h> 

#pragma comment(lib,"ws2_32") 

#define IO_RCVALL _WSAIOW(IOC_VENDOR,1) 

typedef struct IP_HEAD 
{ 
union 
{ 
unsigned char Version; 
unsigned char HeadLen; 
}; 
unsigned char ServiceType; 
unsigned short TotalLen; 
unsigned short Identifier; 
union 
{ 
unsigned short Flags; 
unsigned short FragOffset; 
}; 
unsigned char TimeToLive; 
unsigned char Protocol; 
unsigned short HeadChecksum; 
unsigned int SourceAddr; 
unsigned int DestinAddr; 
unsigned char Options; 
}ip_head; 

void main(int argc,char *argv[]) 
{ 
using namespace std; 
if(argc!=2) 
{ 
cout<<endl<<"请以下格式输入命令行:PackParse packet_sum"<<endl; 
return; 
} 
WSADATA WSAData; 
if(WSAStartup(MAKEWORD(2,2), &WSAData)!=0) 
{ 
cout<<endl<<"WSASTartup初始化失败"<<endl; 
return; 
} 
SOCKET sock=socket(AF_INET,SOCK_RAW,IPPROTO_IP); 
if(sock==INVALID_SOCKET) 
{ 
cout<<endl<<"创建Socket失败!"<<endl; 
goto exit_clean; 
} 
BOOL flag=TRUE; 
if(setsockopt(sock,IPPROTO_IP,IP_HDRINCL,(char *) &flag,sizeof(flag))==SOCKET_ERROR) 
{ 
cout<<endl<<"setsockopt操作失败:"<<WSAGetLastError()<<endl; 
goto exit_clean; 
} 
char hostName[128]; 
if(gethostname(hostName,100)==SOCKET_ERROR) 
{ 
cout<<endl<<"gethostname操作失败:"<<WSAGetLastError()<<endl; 
goto exit_clean; 
} 
hostent *pHostIP; 
if((pHostIP=gethostbyname(hostName))==NULL) 
{ 
cout<<endl<<"gethostbyname操作失败:"<<WSAGetLastError()<<endl; 
goto exit_clean; 
} 
sockaddr_in host_addr; 
host_addr.sin_family=AF_INET; 
host_addr.sin_port=htons(6000); 
host_addr.sin_addr=*(in_addr *)pHostIP->h_addr_list[0]; 
if(bind(sock,(PSOCKADDR)&host_addr,sizeof(host_addr))==SOCKET_ERROR) 
{ 
cout<<endl<<"bind操作失败:"<<WSAGetLastError()<<endl; 
goto exit_clean; 
} 
DWORD dwBufferLen[10]; 
DWORD dwBufferInLen=1; 
DWORD dwBytesReturned=0; 
if(WSAIoctl(sock , IO_RCVALL ,&dwBufferInLen , sizeof(dwBufferInLen) , &dwBufferLen,sizeof(dwBufferLen),&dwBytesReturned,NULL,NULL)==SOCKET_ERROR) 
{ 
cout<<endl<<"WSAIoctl操作失败:"<<WSAGetLastError()<<endl; 
goto exit_clean; 
} 
cout<<endl<<"开始解析IP包:"<<endl; 
char buffer[65535]; 
int packsum=atoi(argv[1]); 
for(int i=0;i<packsum;i++) 
{ 
if(recv(sock,buffer,65535,0)>0) 
{ 
ip_head ip=*(ip_head *)buffer; 
cout<<"-----------------------"<<endl; 
cout<<"版本:"<<(ip.Version>>4)<<endl; 
cout<<"头部长度:"<<((ip.HeadLen &0x0f)*4)<<endl; 
cout<<"服务类型:Priority"<<(ip.ServiceType>>5)<<", Service"<<((ip.ServiceType>>1)&0x0f)<<endl; 
cout<<"总长度:"<<ip.TotalLen<<endl; 
cout<<"标识符:"<<ip.Identifier<<endl; 
cout<<"标志位:"<<((ip.Flags>>15)&0x01)<<",DF= "<<((ip.Flags>>14)&0x01)<<",Mf="<<((ip.Flags>>13)&0x01)<<endl; 
cout<<"片偏移:"<<(ip.FragOffset&0x1fff)<<endl; 
cout<<"生存周期:"<<(int)ip.TimeToLive<<endl; 
cout<<"协议:Protocol"<<(int)ip.Protocol<<endl; 
cout<<"头部校验和:"<<ip.HeadChecksum<<endl; 
cout<<"原地址:"<<inet_ntoa(*(in_addr *)&ip.SourceAddr)<<endl; 
cout<<"目的IP地址:"<<inet_ntoa(*(in_addr *)&ip.DestinAddr)<<endl; 
} 
} 

exit_clean: 
closesocket(sock); 
WSACleanup(); 
}