(完整word版)計(jì)算機(jī)課程設(shè)計(jì)-IP數(shù)據(jù)包解析

成都信息工程學(xué)院成都信息工程學(xué)院成都信息工程學(xué)院成都信息工程學(xué)院iiii如果鏈表的長(zhǎng)度達(dá)到指定的長(zhǎng)度，創(chuàng)建一個(gè)線(xiàn)程對(duì)該鏈表的IP包進(jìn)行解析；再設(shè)置一個(gè)在IP數(shù)據(jù)包鏈表不足給定的長(zhǎng)度，而又中止IP捕獲時(shí)，對(duì)鏈表的處理；為下一個(gè)IP包鏈表創(chuàng)建一個(gè)鏈表頭。建立一個(gè)進(jìn)行IP包解析并顯示的線(xiàn)程，進(jìn)行解析IP數(shù)據(jù)包，然后顯示IP數(shù)據(jù)包。5、運(yùn)行結(jié)果截獲IP數(shù)據(jù)包程序運(yùn)行結(jié)果如下:6、總結(jié)這次計(jì)算機(jī)網(wǎng)絡(luò)課程設(shè)計(jì)是解析IP數(shù)據(jù)包，通過(guò)這次上機(jī)充分應(yīng)用了所學(xué)的計(jì)算機(jī)網(wǎng)絡(luò)和C語(yǔ)言的知識(shí)，并上網(wǎng)搜索一部分相當(dāng)資料，粗略設(shè)計(jì)出該程序通過(guò)本次課程設(shè)計(jì)，充分運(yùn)用了所學(xué)的計(jì)算機(jī)網(wǎng)絡(luò)知識(shí)，設(shè)計(jì)出了如何解析IP數(shù)據(jù)包，從而更加深刻的了解到了IP數(shù)據(jù)包的結(jié)構(gòu)及IP協(xié)議的相關(guān)問(wèn)題，從而對(duì)IP層的工作原理有更好的理解和認(rèn)識(shí)。在課程設(shè)計(jì)的過(guò)程也碰到的不少問(wèn)題。該程序也存在著不少的缺陷，比如并不是所有的數(shù)據(jù)包都能捕獲，女口：IP數(shù)據(jù)包以外的數(shù)據(jù)包都抓不到；只支持ICMRIGMPTCPUDP這些協(xié)議。7、課程設(shè)計(jì)參考資料1.《計(jì)算機(jī)網(wǎng)絡(luò)（第5版）》主編：謝希仁 出版社：電子工業(yè)出版社出版時(shí)間：2009年11月2.《數(shù)據(jù)通信與網(wǎng)絡(luò)（第四版）》吳時(shí)霖周正康吳永輝譯&源程序代碼#include"winsock2.h"#include"ws2tcpip.h"#include"iostream.h"#include"stdio.h"#pragmacomment(lib,"ws2_32.lib")#defineIO_RCVALL_WSAIOW(IOC_VENDOR,1)#defineBUFFER_SIZE65535/*定義IP頭部數(shù)據(jù)結(jié)構(gòu)*/typedefstruct_IP_HEADER{union{BYTEVersion;//版本(前4位)BYTEHdrLen;II報(bào)頭標(biāo)長(zhǎng)(后四位)，IP頭長(zhǎng)度};BYTEServiceType;II服務(wù)類(lèi)型WORDTotalLen;II總長(zhǎng)度WORDID;II標(biāo)識(shí)union{WORDFlags;WORDFragOff;};BYTETimeToLive;BYTEProtocol;WORDHdrChksum;DWORDSrcAddr;DWORDDstAddr;BYTEOptions;}IP_HEADER;//逐位解析IP頭中的信息，獲取版本號(hào)voidgetVersion(BYTEb,BYTE&version){version=b>>4;}voidgetlHL(BYTEb,BYTE&result){result=(b&0x0f)*4;}//解析服務(wù)類(lèi)型char*parseServiceType_getProcedence(BYTEb){switch(b>>5){case7:return"NetworkControl";case6:return"InternetworkControl";case5:return"CRITIC/ECP";case4:return"FlashOverride";case3:return"Falsh";case2:return"Immediate";case1:return"Priority";case0:return"Routine";default:return"Unknown";}}char*parseServiceType_getTOS(BYTEb){b=(b>>1)&OxOf;switch(b){case0:return"Normalservice";case1:return"Minimizemonetarycost";case2:return"Maximizereliability";case4:return"Maximizethroughput";case8:return"Minimizedelay";case15:return"Maximizesecurity";default:return"Unknown";}}/*獲取禁止分片標(biāo)志和分片標(biāo)志 */voidgetFlags(WORDw,BYTE&DF,BYTE&MF){DF=(w>>14)&0x01;MF=(w>>13)&0x01;}/*獲取分片偏移量*/voidgetFragoff(WORDw,WORD&fragoff){fragoff=w&0x1ffff;}〃獲取協(xié)議char*getProtocol(BYTEProtocol){switch(Protocol){case1:return"ICMP";case2:return"IGMP";case3:return"GGP";case4:return"IPinIP";case6:return"TCP";case8:return"EGP";case17:return"UDP";case41:return"IPv6";case46:return"OSPF";default:return"UNKNOWN";}}/*解析IP數(shù)據(jù)包*/voidipparse(FILE*file,char*buffer){IP_HEADERip=*(IP_HEADER*)buffer;fseek(file,O,SEEK_END);BYTEversion;getVersion(ip.Version,version);fprintf(file,"版本=IPV%d\r\n",version);BYTEheaderLen;getIHL(ip.HdrLen,headerLen);fprintf(file,"頭長(zhǎng)度=%d(BYTE)\r\n",headerLen);fprintf(file,"服務(wù)類(lèi)型=%s,%s\r\n",parseServiceType_getProcedence(ip.ServiceType),parseServiceType_getTOS(ip.ServiceType));fprintf(file,"數(shù)據(jù)報(bào)長(zhǎng)度=%d(BYTE)\r\n",ip.TotalLen);fprintf(file,"數(shù)據(jù)報(bào)ID=%d\r\n",ip.ID);/*DF表示禁止分片標(biāo)志， MF表示分片標(biāo)記 */BYTEDF,MF;getFlags(ip.Flags,DF,MF);fprintf(file,"分段標(biāo)志DF=%d,MF=%d\r\n",DF,MF);WORDfragOff;getFragoff(ip.FragOff,fragOff);fprintf(file,"分段偏移值=%d\r\in",fragOff);fprintf(file,"生存期=%d(hops)\r\n",ip.TimeToLive);fprintf(file,"協(xié)議=%s\r\in",getProtocol(ip.Protocol));fprintf(file,"頭校驗(yàn)和=0x%0x\r\n",ip.HdrChksum);fprintf(file,"源IP地址=%s\r\in",inet_ntoa(*(in_addr*)&ip.SrcAddr));fprintf(file,"目的IP地址=%s\r\n",inet_intoa(*(in_addr*)&ip.DstAddr));fprintf(file," \r\n");}/*程序入口*/intmain(intargc,char*argv[]){/*cmd參數(shù)*/if(argc!=2){printf("usageerror!'n");return-1;}FILE*file;/*以讀寫(xiě)的方式建立一個(gè)文本文件 logfile.txt*/if((file=fopen(argv[1],"w+"))==NULL){printf("failtoopenfile%s","logfile.txt");return-1;}WSADatawsData;/*啟動(dòng)2.2版本的Socket，并將Socket版本信息保存到wsData中*/if(WSAStartup(MAKEWORD(2,2),&wsData)!=0){printf("WSAstartupfailed!'n");return-1;}fprintf(file,"Socket初始化...\r\n");fprintf(file,"==================================\r\n");fprintf(file,"描述：%s\r\n",wsData.szDescription);fprintf(file,"狀態(tài)：%s\r\n",wsData.szSystemStatus);fprintf(file,"==================================\r\n");SOCKETsock;/*創(chuàng)建原始套接字*/if((sock=socket(AF_INET,SOCK_RAW,IPPROTO_IP))==INVALID_SOCKET){printf("Cannotcreatesocket!\n");return-1;}BOOLflag=true;/*設(shè)置IP頭操作選項(xiàng)*/if(setsockopt(sock,IPPROTO_IP,IP_HDRINCL,(CHAR*)&flag,sizeof(flag))==SOCKET_ERROR){printf("setsockoptfailed!\n");return-1;}charhostName[128];/*獲取本地主機(jī)名 */

if(gethostname(hostName,100)==SOCKET_ERROR){printf("gethostnamefailed!\n");return-1;}hostent*pHostlP;/*根據(jù)主機(jī)名獲取主機(jī)信息 */if((pHostlP=gethostbyname(hostName))==NULL){printf("gethostbynamefailed!\n");return-1;}printf("Hostname:%s\r\n",pHostlP->h_name);printf("IPAddress:%s\r\n",inet_ntoa(*((structin_addr*)pHostlP->h_addr)));/*封裝IP地址信息*/sockaddr_inaddr_in;addr_in.sin_addr=*(in_addr*)pHostlP->h_addr_list[0];addr_in.sin_family=AF_INET;addr_in.sin_port=htons(6000);//監(jiān)聽(tīng)的端口號(hào)/*把Socket綁定到本地網(wǎng)卡 */if(bind(sock,(PSOCKADDR)&addr_in,sizeof(addr_in))==SOCKET_ERROR){printf("bindfailed");return-1;}DWORDdwBufferLen[10];DWORDdwBufferlnLen=1;DWORDdwBytesReturned=O;/*設(shè)置網(wǎng)卡為混雜模式 */if(WSAIoctl(sock,IO_RCVALL,&dwBufferlnLen,sizeof(dwBufferlnLen),R){&dwBufferLen,sizeof(dwBufferLen),&dwBytesReturned,NULL,NULL)==SOCKET_ERROprintf("icotlsocketfailed\n");R){return-1;}charbuffer[BUFFER_SIZE];printf(”=============開(kāi)始解析