集美大學(xué)計(jì)算機(jī)工程學(xué)院實(shí)驗(yàn)報告課程名稱：TCP/IP協(xié)議與通訊程序設(shè)計(jì)班級：實(shí)驗(yàn)成績：實(shí)驗(yàn)項(xiàng)目名稱：網(wǎng)絡(luò)嗅探器的編程仿真學(xué)號：上機(jī)實(shí)踐日期：2016-06-14實(shí)驗(yàn)項(xiàng)目編號：12組號：1上機(jī)實(shí)踐時間：2學(xué)時一、實(shí)驗(yàn)?zāi)康恼J(rèn)識利用原始套接字進(jìn)行通訊程序的編寫，編譯和執(zhí)行。二、實(shí)驗(yàn)內(nèi)容與設(shè)計(jì)思想利用原始套接字編程將網(wǎng)卡設(shè)置為混雜模式，對網(wǎng)絡(luò)上傳輸?shù)臄?shù)據(jù)包進(jìn)行捕捉與剖析，要求析出并顯示數(shù)據(jù)包的發(fā)送端IP地址以及接收端的IP地址。三、實(shí)驗(yàn)使用環(huán)境操作系統(tǒng)：

MicrosoftWindowsXPSP2編程環(huán)境：

VisualC++6.0四、實(shí)驗(yàn)步驟和調(diào)試過程源代碼：#include"initsock.h"#include"protoinfo.h"#include<stdio.h>#include"mstcpip.h"#pragmacomment(lib,"Advapi32.lib")CInitSocktheSock;剖析tcp數(shù)據(jù)voidDecodeTCPPacket(char*pData){TCPHeader*pTCPHdr=(TCPHeader*)pData;printf("Port:%d->%d\n",ntohs(pTCPHdr->sourcePort),ntohs(pTCPHdr->destinationPort));下邊還可以依據(jù)目的端口號進(jìn)一步剖析應(yīng)用層協(xié)議switch(::ntohs(pTCPHdr->destinationPort)){case21:break;case80:case8080:break;}}剖析ip數(shù)據(jù)voidDecodeIPPacket(char*pData){IPHeader*pIPHdr=(IPHeader*)pData;in_addrsource,dest;charszSourceIp[32],szDestIp[32];printf("\n\n-------------------------------\n");從IP頭中拿出源IP地址和目的IP地址source.S_un.S_addr=pIPHdr->ipSource;dest.S_un.S_addr=pIPHdr->ipDestination;strcpy(szSourceIp,::inet_ntoa(source));strcpy(szDestIp,::inet_ntoa(dest));printf("%s->%s\n",szSourceIp,szDestIp);IP頭長度intnHeaderLen=(pIPHdr->iphVerLen&0xf)*sizeof(ULONG);switch(pIPHdr->ipProtocol){協(xié)議DecodeTCPPacket(pData+nHeaderLen);break;caseIPPROTO_UDP:break;caseIPPROTO_ICMP:break;}}voidmain( ){創(chuàng)辦原始套節(jié)字SOCKETsRaw=socket(AF_INET,SOCK_RAW,IPPROTO_IP);獲適合地IP地址charszHostName[56];SOCKADDR_INaddr_in;structhostent*pHost;gethostname(szHostName,56);if((pHost=gethostbyname((char*)szHostName))==NULL)return;在調(diào)用ioctl從前，套節(jié)字必定綁定addr_in.sin_family=AF_INET;addr_in.sin_port=htons(0);將當(dāng)?shù)豬p復(fù)制到addr_in結(jié)構(gòu)體memcpy(&addr_in.sin_addr.S_un.S_addr,pHost->h_addr_list[0],pHost->h_length);//ip變換為字符串輸出printf("Bindingtointerface:%s\n",::inet_ntoa(addr_in.sin_addr));if(bind(sRaw,(PSOCKADDR)&addr_in,sizeof(addr_in))==SOCKET_ERROR){}//return;設(shè)置SIO_RCVALL控制代碼，以便接收全部的IP包DWORDdwValue=1;設(shè)置原始套接字能接收全部數(shù)據(jù)if(ioctlsocket(sRaw,SIO_RCVALL,&dwValue)!=0){}return;開始接收封包c(diǎn)harbuff[1024];intnRet;while(TRUE){nRet=recv(sRaw,buff,1024,0);if(nRet>0){DecodeIPPacket(buff);}}closesocket(sRaw);}執(zhí)行結(jié)果：查察當(dāng)?shù)氐膇p五、實(shí)驗(yàn)小結(jié)為了使網(wǎng)卡接收全部經(jīng)過它的封包，要將網(wǎng)卡設(shè)置為混雜模式，詳盡是在創(chuàng)辦原始