解析IP数据包课程设计

1、 程序源代码#includewinsock2.h#includews2tcpip.h#include#include#include#pragmacomment(lib,ws2_32.lib)usingnamespacestd;typedefstruct_IP_HEADERunion/版本/版本/ip头部长度BYTEHdrLen;BYTEServiceType;/服务类型WORDTotalLen;/总长度WORDID;/标识unionWORDFlags;/标志WORDFragoff;/分段偏移;BYTETimeToLive;/生命期BYTEProtocol;/协议WORDHdrChksum;/

2、头校验和DWORDSrcAddr;/源地址DWORDDstAddr;/目的地址BYTEOptions;/选项IP_HEADER;intmain()SOCKETsock;WSADATAwsData;if(WSAStartup(MAKEWORD(2,2),&wsData)!=0)printf(WSAStartupfailed!n);return-1;if(sock=socket(AF_INET,SOCK_RAW,IPPROTO_IP)=INVALID_SOCKET)printf(createsocketfailedn);return-1;BOOLflag=true;if(setsockopt(so

3、ck,IPPROTO_IP,IP_HDRINCL,(char*)&flag,sizeof(flag)=SOCKET_ERROR)printf(setsockoptfailed!n);return-1;charhostName128;if(gethostname(hostName,100)=SOCKET_ERROR)printf(gethostnamefailed!n);return-1;hostent*pHostIP;if(pHostIP=gethostbyname(hostName)=NULL)printf(gethostbynamefailedn);return-1;sockaddr_in

4、addr_in;addr_in.sin_addr=*(in_addr*)pHostIP-h_addr_list0;addr_in.sin_family=AF_INET;addr_in.sin_port=htons(6000);if(bind(sock,(PSOCKADDR)&addr_in,sizeof(addr_in)=SOCKET_ERROR)printf(bindfailedn);return-1;#defineIO_RCVALL_WSAIOW(IOC_VENDOR,1)DWORDdwBufferLen10;DWORDdwBufferInLen=1;DWORDdwBytesReturne

5、d=0;charbuffer100;if(WSAIoctl(sock,IO_RCVALL,&dwBufferInLen,sizeof(dwBufferInLen),&dwBufferLen,sizeof(dwBufferLen),&dwBytesReturned,NULL,NULL)=SOCKET_ERROR)printf(ioctlsocketfaildn);return-1;printf(开始解析经过本机的IP数据包!nn);while(true)intsize=recv(sock,buffer,sizeof(buffer),0);IP_HEADERip=*(IP_HEADER*)buff

6、er;coutendl;cout版本:4)endl;coutIP头部长度:(ip.HdrLen&0 x0f)*4)endl;cout服务类型:Priority5)Service1)&0 x0f)endl;cout总长度:ip.TotalLenendl7cout标识符:ip.IDendl;cout标志位:15)&0 x01),DF=14)&0 x01)13)&0 x01)endl;cout分段偏移:(ip.Fragoff&0 x1fff)endl;(ipcout生存周期:(int)ip.TimeToLiveendl;cout协议:Protocol(int)ip.Protocolcout头校验和:ip.HdrChksumendl;cout源地endl;址:inet_ntoa(*(in_addr*)&ip.SrcAdd