ip数据包解析源程序

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1、#include"winsock2.h"#include"ws2tcpip.h"#include#include#includeusingnamespacestd;typedefstruct_IP_HEADER{union{BYTEVersion;BYTEHdrLen;};BYTEServiceType;WORDTotalLen;WORDID;union{WORDFlags;WORDFragoff;};BYTETimeToLive;BYTEProtocol;WORDHdrChksum;DWORDSrcAddr;DWORD

2、DstAddr;BYTEOptions;}IP_HEADER;intmain(){SOCKETsock;WSADATAwsData;if(WSAStartup(MAKEWORD(2,2),&wsData)!=0){printf("WSAStartupfailed!");return-1;}if((sock=socket(AF_INET,SOCK_RAW,IPPROTO_IP))==INVALID_SOCKET){printf("createsocketfailed");return-1;}BOOLflag=true;if(setsockopt(sock,IPPROTO_I

3、P,IP_HDRINCL,(char*)&flag,sizeof(flag))==SOCKET_ERROR){printf("setsockoptfailed!");return-1;}charhostName[128];if(gethostname(hostName,100)==SOCKET_ERROR){printf("gethostnamefailed!");return-1;}hostent*pHostIP;if((pHostIP=gethostbyname(hostName))==NULL){printf("gethostbynamefailed");ret

4、urn-1;}sockaddr_inaddr_in;addr_in.sin_addr=*(in_addr*)pHostIP->h_addr_list[0];addr_in.sin_family=AF_INET;addr_in.sin_port=htons(6000);if(bind(sock,(PSOCKADDR)&addr_in,sizeof(addr_in))==SOCKET_ERROR){printf("bindfailed");return-1;}#defineIO_RCVALL_WSAIOW(IOC_VENDOR,1)DWORDdwBufferLen[10];DWO

5、RDdwBufferInLen=1;DWORDdwBytesReturned=0;charbuffer[100];if(WSAIoctl(sock,IO_RCVALL,&dwBufferInLen,sizeof(dwBufferInLen),&dwBufferLen,sizeof(dwBufferLen),&dwBytesReturned,NULL,NULL)==SOCKET_ERROR){printf("ioctlsocketfaild");return-1;}printf("开始解析经过本机的IP数据包!");while(true){intsize=recv(so

6、ck,buffer,sizeof(buffer),0);IP_HEADERip=*(IP_HEADER*)buffer;cout<<"-----------------------"<>4)<>5)<<",Service"<<((ip.ServiceType>>1)&0x0f)<

7、dl;cout<<"标识符:"<>15)&0x01)<<",DF="<<((ip.Flags>>14)&0x01)<<",Mf="<<((ip.Flags>>13)&0x01)<