知識影響格局，格局決定命運！TCPIP協議與網絡編程期末大作業編號TCP/IP協議與網絡編程期末大作業題目：基于Socket的網絡通信物聯網工程學院計算機科學與技術專業學號學生姓名任課教師二〇一六年X月摘要課題是基于TCP/UDP室系統主要包括注冊、登陸、群聊、單聊、顯示在線人員和退出功能。系統于TCP協議，服務器端向客戶顯示端發送數據是基于UDP協議。接字，達到數據傳送的目的，從而實現聊天室系統功能。關鍵詞：TCP/UDP；聊天室；網絡套接字；數據傳送目錄第1章總體設計2第2章客戶端設計32.1發送端設計32.11流程圖32.12代碼32.2接收端設計32.21流程圖32.22代碼3第3章服務器設計43.1流程圖43.2代碼4第4章運行結果5第1章總體設計1原理1.1TCPTCP/IP協議的程序是傳輸層使用TCP器之間先建立連接，在數據傳輸完成后要關閉連接，釋放網絡資源。面向連接的客戶/服務器程序工作模型如下：1.2UDP無連接的數據報（SOCK_DGRAM）傳輸服務在傳輸層使用的協議時UDP協只要關閉套接口，釋放網絡資源，通信過程就結束了。無連接的數據包傳輸服務通信是，客戶端與服務器端所使用的函數是類似的。面向無連接的客戶/服務器程序工作模型如下：1.3流程圖基于TCP/UDP分。功能主要是注冊、登陸、群聊、單聊、顯示在線人員和退出。客戶端與1知識影響格局，格局決定命運！服務器端的連接協議基于TCPUDP端與服務器端建立連接后，客戶端進行操作，將數據發送至客戶顯示端。第2章客戶端設計2.11流程圖2.12代碼#includewinsock2.h#includestdlib.h#includestdio.h#pragmacomment(lib,“Ws2_32.lib“)#defineBUFFER_SIZE1024voidMySendMessage(SOCKETsSocket,char*response,intresponseLen);intmain(intargc,char**argv){WSADATAwsaData;sockaddr_inser,cli;SOCKETsClient,wchysClient;intiLen,wchyiLen;intiRecv;charsend_buf[1000];charrecv_buf[BUFFER_SIZE];if(WSAStartup(MAKEWORD(2,2),wsaData)!=0){printf(“WSAStartup()＼n“);return0;}printf(“手動連接模式中....＼n“);charszServer[256];//連接的服務器地址，IP地址printf(“請輸入即將連接的服務器IP地址:“);gets(szServer);ser.sin_family=AF_INET;ser.sin_port=htons(5050);ser.sin_addr.s_addr=inet_addr(szServer);charuser[20],password[20];charstr[100],str1[100],wchystr[100];boolhasLogin=false;//只能綁定一次，開始放在了循環里，555wchysClient=socket(AF_INET,SOCK_DGRAM,0);if(wchysClient==INVALID_SOCKET){printf(“socket()Faild:%d＼n“,WSAGetLastError());return0;}cli.sin_family=AF_INET;cli.sin_port=htons(5053);cli.sin_addr.s_addr=htonl(INADDR_ANY);if(bind(wchysClient,(LPSOCKADDR)cli,sizeof(cli))==SOCKET_ERROR){printf(“bind()Faild:%d＼n“,WSAGetLastError());return0;}wchyiLen=sizeof(cli);memset(recv_buf,0,sizeof(recv_buf));sClient=socket(AF_INET,SOCK_STREAM,0);if(sClient==INVALID_SOCKET){printf(“socket()＼n“);return0;}if(connect(sClient,(sockaddr*)ser,sizeof(ser))==INVALID_SOCKET){printf(“socket()＼n“);return0;}else{boolhasLogin=false;while(!hasLogin){printf(“--------------------------------＼n“);printf(“0.注冊＼2知識影響格局，格局決定命運！n“);printf(“1.登陸＼n“);printf(“2.退出＼n“);printf(“請輸入相應的數字:＼nscanf(“%s“,str);switch(str[0]){case＇0＇:printf(“用戶名：“);scanf(“%s“,user);printf(“密碼：“);scanf(“%s“,password);strcpy(send_buf,“0“);strcat(send_buf,user);strcat(send_buf,“@“);strcat(send_buf,password);MySendMes戶名：“);scanf(“%s“,user);printf(“密碼:“);scanf(“%s“,password);strcpy(send_buf,“1“);strcat(send_buf,user);strcat(send_buf,“@“);strcat(send_buf,password);MySendMessage(sClient,send_buf,sizeof(send_buf));iRecv=recvfrom(wchysClient,recv_buf,BUFFER_SIZE,0,(SOCKADDR*)cli,wchyiLen);if(iRecv==SOCKET_ERROR){printf(“recvfrom()Faild:%d＼n“,WSAGetLastError());return0;}elseif(iRecv==0)break;else{//接收到了正確數據recv_buf[1]==＇@＇){hasLogin=0;system(“cls“);printf(“登錄失敗！*＇){hasLogin=0;system(“cls“);printf(“已經在其他地方登陸＼n“);printf(“登錄失敗！請重新選擇用戶登錄或注冊后登錄^_^＼n“);}if(recv_buf[0]==＇#＇recv_buf[1]==＇#＇){hasLogin=1;system(“cls“);printf(“登錄成功^_^＼n“);boolwchyhasLogin=false;while(!wchyhasLogin){printf(“--------------------------------＼n“);printf(“0.群聊＼n“);printf(“1.單聊＼n“);printf(“2.在線用戶＼n“);printf(“3.退出＼n“);printf(“請輸入相應的數字:＼nscanf(“%s“,wchystr);switch(wchystr[0]){case＇0＇:wchyhasLogin=1;printf(“輸入exit退出。＼n“);printf(“--------------------------------＼n“);while(wchyhasLogin){printf(“scanf(“%s“,str);if(strcmp(str,“exit“)!=0){strcpy(send_buf,“2“);strcat(send_buf,user);strca3知識影響格局，格局決定命運！t(send_buf,“@“);strcat(send_buf,str);MySendMessage(sClient,send_buf,sizeof(send_buf));}else{system(“cls“);wchyhasLogin=0;}}break;case＇1＇:wchyhasLogin=1;printf(“請輸入單聊對象的用戶名：“);scanf(“%s“,str1);strcpy(send_buf,“5“);strcat(send_buf,str1);strcat(send_buf,“@“);strcat(send_buf,user);strcat(send_buf,“*“);strcat(send_buf,“__Welcome__To__Single__Chat...“);MySendMessage(sClient,send_buf,sizeof(send_buf));iRecv=recvfrom(wchysClient,recv_buf,BUFFER_SIZE,0,(SOCKADDR*)cli,wchyiLen);if(iRecv==SOCKET_ERROR){printf(“recvfrom()Faild:%d＼n“,WSAGetLastError());return0;}elseif(iRecv==0)break;else{//接收未在線，退出了單聊模式＼n“);}if(recv_buf[0]==＇%＇recv_buf[1]==＇%＇){printf(“輸入exit退出。＼n“);printf(“--------------------------------＼n“);while(wchyhasLogin){printf(“scanf(“%s“,str);if(strcmp(str,“exit“)!=0){strcpy(send_buf,“5“);strcat(send_buf,str1);strcat(send_buf,“@“);strcat(send_buf,user);strcat(send_buf,“*“);strcat(send_buf,str);MySendMessage(sClient,send_buf,sizeof(send_buf));}else{system(“cls“);wchyhasLogin=0;}}}break;case＇2＇:strcpy(send_buf,“4“);strcat(send_buf,user);strcat(send_buf,“@“);strcat(send_buf,str);MySendMessage(sClient,send_buf,sizeof(send_buf));system(“cls“);break;case＇3＇:strcpy(send_buf,“3“);strcat(send_buf,user);strcat(send_buf,“@“);MySendMessage(sClient,send_buf,sizeof(send_buf));hasLogin=0;wchyhasLogin=1;system(“cls“);break;default:system(“cls“);printf(“請輸入正確信息＼n“);break;}}}break;case＇4知識影響格局，格局決定命運！2＇:exit(0);break;default:system(“cls“);printf(“請輸入正確信息“);}}}system(“PAUSE“);closesocket(sClient);WSACleanup();return0;}voidMySendMessage(SOCKETsSocket,char*response,intresponseLen){intiSend;iSend=send(sSocket,response,responseLen,0);if(iSend==SOCKET_ERROR){printf(“send()Failed.:%d＼n“,WSAGetLastError());}elseif(iSend==0);else{//printf(“send()succeeded!＼n“);printf(“----------------------＼n“);}}2.2接收端設計2.21流程圖2.22代碼#includestdlib.h#includestring.h//formain.cpp(1.cpp)#defineDEFAULT_PORT5051//FORRECV#defineDEFAULT_PORTSEND5052//FORSEND#defineBUFFER_LENGTH1000constboolDebug=0;#defineMaxUser1000//--------------------------------------------------------------------------------////當程序遇到異常而結束時會示出錯誤而退出//--------------------------------------------------------------------------------////成員結構信息#defineUserNameLen200#definePasswordLen200typedefstruct{charUserName[200];charPassword[200];boolLog;//是否登陸charIp[20];}UserData;#definethefile“config.txt“boolSaveData(UserData**userdata,intuserdatap);//--------------------------------------------------------------------------------////初始化用戶數據導入intfindUser(UserData**data,intnum,char*name){inti;for(i=0;i=num;i++){if(strcmp(name,data[i]-UserName)==0)returni;}return-1;}voiddeal(char*str,UserData**data,intnum,char*response,char*ip){charUser[UserNameLen];charPass[PasswordLen];//第一位字符是功能號//0注冊//1登陸//2會話//3退出0+name+@+passwordfor(i=1;istrlen(str);i++)if(str[i]==＇@＇)break;str[i]=＇＼0＇;strcpy(User,str+1);strcpy(Pass,str+i+1);t=findUser(data,num,U5知識影響格局，格局決定命運！ser);if(t==-1){//該用戶名不存在，可以注冊num++;data[num]=(UserData*)malloc(sizeof(UserData));if(data[num]==NULL){printf(“[+]ERROR:mallocfailed＼n“);exit(1);}strcpy(data[num]-UserName,User);strcpy(data[num]-Password,Pass);data[num]-Log=0;memset(data[num]-Ip,＇＼0＇,sizeof(data[num]-Ip));printf(“%s用戶注冊成功＼n“,User);//--------------------------------------------------注冊完成//返回成功信息strcpy(response,“00“);//第一位是功能號第二位是狀態號0表示成功1表示失敗SaveData(data,num);}else{//failprintf(“%s用戶注冊失敗＼n“,User);//-----------------------------------------------注冊失敗strcpy(response,“01“);}}elseif(str[0]==＇1＇){//登陸的消息格式為1+name+@+passwordfor(i=1;istrlen(str);i++)if(str[i]==＇@＇)break;str[i]=＇＼0＇;//printf(“i=%d＼n“,i);strcpy(User,str+1);strcpy(Pass,str+i+1);t=findUser(data,num,User);if(t!=-1){//找到該用戶//printf(“Pass=%s“,Pass);//printf(“Pawd=%s“,data[t]-Password);if(strcmp(Pass,data[t]-Password)==0data[t]-Log==0){//密碼驗證成功printf(“%s登陸成功＼n“,User);data[t]-Log=1;strcpy(data[t]-Ip,ip);strcpy(response,“10“);}elseif(strcmp(Pass,data[t]-Password)==0data[t]-Log==1){printf(“%s已經在其他地方登陸＼n“,User);strcpy(response,“1@“);}else{printf(“%s登陸密碼錯誤＼n“,User);strcpy(response,“11“);}}else{printf(“%s用戶不存在，登陸失敗＼n“,User);strcpy(response,“12“);}}elseif(str[0]==＇2＇){//會話的消息格式為2+＇name＇+＇@＇+＇(message)＇for(i=1;istrlen(str);i++)if(str[i]==＇@＇)break;str[i]=＇＼0＇;strcpy(User,str+1);t=findUser(data,num,User);if(t!=-1strcmp(data[t]-UserName,User)==0strcmp(data[t]-Ip,ip)==0){//表示確實是正6知識影響格局，格局決定命運！確用戶發來的會話strcpy(response,“20“);strcat(response,User);strcat(response,“:“);strcat(response,str+i+1);printf(“%s:%s＼n“,User,str+i+1);}else{strcpy(response,“21“);printf(“非正確用式為@＇)break;str[i]=＇＼0＇;strcpy(User,str+1);t=findUser(data,num,User);if(t!=-1strcmp(data[t]-UserName,User)==0strcmp(data[t]-Ip,ip)==0){//表示確實是正確用戶發來的會話strcpy(response,“30“);data[t]-Log=0;memset(data[t]-Ip,＇＼0＇,sizeof(data[t]-Ip));printf(“%s退出＼n“,data[t]-UserName);}else{strcpy(response,“31“);printf(“非正確用戶發來會話，不予處理!“);}}elseif(str[0]==＇4＇){for(i=1;istrlen(str);i++)if(str[i]==＇@＇)break;str[i]=＇＼0＇;strcpy(response,“40“);for(i=0;i=num;i++){if(data[i]-Log==1){printf(“%s[%s]在線＼n“,data[i]-UserName,data[i]-//printf(“%s＼n“,data[i]-UserName);strcat(response,data[i]-UserName);strcat(response,““);}else{//printf(“%s“,data[i]-}}}elseif(str[0]==＇5＇){for(i=1;istrlen(str);i++)if(str[i]==＇@＇)break;str[i]=＇＼0＇;strcpy(User,str+1);printf(“%s用戶接收＼n“,User);strcpy(Pass,str+i+1);for(i=1;istrlen(Pass);i++)if(Pass[i]==＇*＇)break;Pass[i]=＇＼0＇;printf(“%s用戶發送＼n“,Pass);t=findUser(data,num,User);if(t==-1){strcpy(response,“60“);printf(“單聊對象不存在“);}else{if(data[t]-Log==0){strcpy(response,“61“);printf(“%s未在線＼n“,User);}elseif(data[t]-Log==1){strcpy(response,“50“);strcat(7知識影響格局，格局決定命運！response,Pass);strcat(response,“:“);strcat(response,Pass+i+1);printf(“%s:%s＼n“,Pass,Pass+i+1);printf(“%s在線，可進行聊天＼n“,User);}}}}voidMySendMessage(intsSocket,char*response,intresponseLen,SOCKADDR*cli,intcliLen){intiSend;iSend=sendto(sSocket,response,responseLen,0,(SOCKADDR*)cli,cliLen);if(iSend==SOCKET_ERROR){printf(“sendto()Failed.:%d＼n“,WSAGetLastError());}elseif(iSend==0);else{//printf(“sendto()succeeded!＼n“);//printf(“----------------------＼n“);}}boolInitData(UserData**s,intnum,intp)//成功返回true發生錯誤返回false{//-----------------------------------------////讀取文件信息并返回FILE*fp;charUserBuf[UserNameLen];charPassBuf[PasswordLen];fp=fopen(thefile,“r“);if(!fp){if(Debug)printf(“config文件不存在＼n“);}else{if(Debug)printf(“findconfig.txt＼n“);while(!feof(fp)){//fgets(buf,sizeof(buf),fp);fscanf(fp,“%s“,UserBuf);fscanf(fp,“%s“,PassBuf);if(Debug)printf(“[+]User:%sPassword:%s＼n“,UserBuf,PassBuf);//addp++;s[p]=(UserData*)malloc(sizeof(UserData));if(!s[p]){printf(“[+]ERROR:mallocfailed!＼n“);returnfalse;}strcpy(s[p]-UserName,UserBuf);strcpy(s[p]-Password,PassBuf);s[p]-Log=0;memset(s[p]-Ip,＇＼0＇,sizeof(s[p]-Ip));}fclose(fp);}returntrue;}boolSaveData(UserData**userdata,intuserdatap){FILE*fp;///建立配置文件fp=fopen(thefile,“w“);if(!fp){printf(“[+]ERROR:無法創建config文件！“);returnfalse;};inti;for(i=0;i=userdatap;i++){fprintf(fp,“%s%s“,userdata[i]-UserName,userdata[i]-Password);if(i!=userdatap)fprintf(fp,“＼n“);}fclose(fp);}#includewinsock2.h#includestdlib.h#includestdio8知識影響格局，格局決定命運！.h#pragmacomment(lib,“ws2_32.lib“)#include“ser.h“//UserData*userdata[MaxUser];intuserdatap=-1;#defineBUFFER_SIZE2048voidCompressArrays(WSAEVENTevents[],SOCKETsockets[],DWORD*total,intindex){for(size_ti=index+1;i*total;i++){events[i-1]=events[i];}*total--;}intmain(intargc,char**argv){//InitData(userdata,MaxUser,userdatap);charresponse[BUFFER_LENGTH];WSADATAwsaData;charbuffer[BUFFER_SIZE];sockaddr_inInternetAddr;//客戶地址structsockaddr_incli;structsockaddr_incliArray[WSA_MAXIMUM_WAIT_EVENTS];intiLen;iLen=sizeof(cli);//udp發送SOCKETsSocket;structsockaddr_inser;charsend_buf[]=“udp!“;SOCKETsClient;SOCKETSocketArray[WSA_MAXIMUM_WAIT_EVENTS];WSANETWORKEVENTSNetworkEvents;WSAEVENTNewEvent;WSAEVENTEventArray[WSA_MAXIMUM_WAIT_EVENTS];SOCKETAccept,Listen;DWORDEventTotal=0;DWORDIndex;if(WSAStartup(MAKEWORD(2,2),wsaData)!=0){printf(“WSAStartup()＼n“);return0;}//創建一個流式套接口Listen=socket(AF_INET,SOCK_STREAM,0);InternetAddr.sin_family=AF_INET;InternetAddr.sin_addr.s_addr=htonl(INADDR_ANY);InternetAddr.sin_port=htons(5050);if(bind(Listen,(PSOCKADDR)InternetAddr,sizeof(InternetAddr))==SOCKET_ERROR){printf(“bind()＼n“);return0;}printf(“----------------------＼n“);printf(“ServerWaiting＼n“);printf(“----------------------＼n“);//創建一個事件對象NewEvent=WSACreateEvent();//在Listen套接口上注冊套接口連接和關閉的網絡事件WSAEventSelect(Listen,NewEvent,FD_ACCEPT|FD_CLOSE);if(listen(Listen,5)==SOCKET_ERROR){printf(“listen()＼n“);return0;}SocketArray[EventTotal]=Listen;EventArray[EventTotal]=NewEvent;EventTotal++;//udpsSocket=socket(AF_INET,SOCK_DGRAM,0);if(sSocket==INVALID_SOCKET){printf(“failed“);return0;}ser.sin_family=AF_INET;ser.sin_port=htons(5051);//ser.sin_addr.s_addr=in9知識影響格局，格局決定命運！et_addr(“127.0.0.1“);while(true){//在所有套接口上等待網絡事件的發生Index=WSAWaitForMultipleEvents(EventTotal,EventArray,FALSE,WSA_INFINITE,FALSE);if(WSAEnumNetworkEvents(SocketArray[Index-WSA_WAIT_EVENT_0],EventArray[Index-WSA_WAIT_EVENT_0],NetworkEvents)==SOCKET_ERROR){printf(“%d/n“,WSAGetLastError());printf(“WSAEnumNetworkEvents()＼n“);return0;}//檢查FD_ACCEPTif(NetworkEvents.lNetworkEventsFD_ACCEPT){if(NetworkEvents.iErrorCode[FD_ACCEPT_BIT]!=0){WSACloseEvent(EventArray[Index-WSA_WAIT_EVENT_0]);printf(“FD_ACCEPTfailedwitherror%d＼n“,NetworkEvents.iErrorCode[FD_ACCEPT_BIT]);break;}//接收新的連接，并將其存入套接口數組Accept=accept(SocketArray[Index-WSA_WAIT_EVENT_0],(structsockaddr*)cli,iLen);//當套接口的數量超界時，關閉該套接口if(EventTotalWSA_MAXIMUM_WAIT_EVENTS){printf(“Toomanyconnections“);closesocket(Accept);break;}NewEvent=WSACreateEvent();if(NewEvent==WSA_INVALID_EVENT){printf(“WSACreateEvent()＼n“);break;}WSAEventSelect(Accept,NewEvent,FD_READ|FD_WRITE|FD_CLOSE);EventArray[EventTotal]=NewEvent;SocketArray[EventTotal]=Accept;cliArray[EventTotal]=cli;EventTotal++;printf(“Socket%dconnected＼n“,Accept);}//一下處理FD_READ通知if(NetworkEvents.lNetworkEventsFD_READ){if(NetworkEvents.iErrorCode[FD_READ_BIT]!=0){WSACloseEvent(EventArray[Index-WSA_WAIT_EVENT_0]);printf(“FD_READfailedwitherror%d＼n“,NetworkEvents.iErrorCode[FD_READ_BIT]);break;}//從套接口讀入數據intiRecv=recv(SocketArray[Index-WSA_WAIT_EVENT_0],buffer,sizeof(buffer),0);if(iRecv==0){break;}elseif(iRecv==SOCKET_ERROR){printf(“recv()＼n“);break;}else{//請求端10知識影響格局，格局決定命運！IPser.sin_addr.s_addr=inet_addr(inet_ntoa(cliArray[Index-WSA_WAIT_EVENT_0].sin_addr));printf(“AcceptedclientIP:[%s],port:[%d]＼n“,inet_ntoa(cliArray[Index-WSA_WAIT_EVENT_0].sin_addr),ntohs(cliArray[Index-WSA_WAIT_EVENT_0].sin_port));printf(“recv:%s＼n“,buffer);memset(response,＇＼0＇,sizeof(response));deal(buffer,userdata,userdatap,response,inet_ntoa(cliArray[Index-WSA_WAIT_EVENT_0].sin_addr));printf(“response:%s＼n“,response);inti;if(response[0]==＇2＇response[1]==＇0＇){//處理20群聊printf(“recv:%s＼n“,buffer);for(i=0;i=userdatap;i++){if(userdata[i]-Log==0)continue;ser.sin_addr.s_addr=inet_addr(userdata[i]-MySendMessage(sSocket,response,sizeof(response),(SOCKADDR*)ser,sizeof(ser));}}elseif(response[0]==＇5＇response[1]==＇0＇){//處理50單聊charstrwchy[2048];strcpy(strwchy,response);printf(“recv:%s＼n“,buffer);for(i=1;istrlen(strwchy);i++)if(strwchy[i]==＇:＇)break;strwchy[i]=＇＼0＇;printf(“strwchy:%s＼n“,strwchy+2);for(i=0;i=userdatap;i++){if(strcmp((buffer+1),(strwchy+2))==0){if(strcmp((strwchy+2),userdata[i]-UserName)==0){//發送給單聊對象ser.sin_addr.s_addr=inet_addr(userdata[i]-MySendMessage(sSocket,response,sizeof(response),(SOCKADDR*)ser,sizeof(ser));}}else{if(strcmp((buffer+1),userdata[i]-UserName)==0){//發送給單聊對象ser.sin_addr.s_addr=inet_addr(userdata[i]-MySendMessage(sSocket,response,sizeof(response),(SOCKADDR*)ser,sizeof(ser));}if(strcmp((strwchy+2),userdata[i]-UserName)==0){//發送給單聊對象ser.sin_addr.s_addr=inet_addr(userdata[i]-MySendMessage(sSocket,response,sizeof(response),(SOCKADDR*)ser,sizeof(ser));}}}}elseif(response[0]==＇4＇response[1]==＇0＇){//處理40在線人數printf(“recv:%s＼11知識影響格局，格局決定命運！n“,buffer);for(i=0;i=userdatap;i++){if(strcmp((buffer+1),userdata[i]-UserName)==0){//發到請求方的接收端ser.sin_addr.s_addr=inet_addr(userdata[i]-MySendMessage(sSocket,response,sizeof(response),(SOCKADDR*)ser,sizeof(ser));}}}else{MySendMessage(sSocket,response,sizeof(response),(SOCKADDR*)ser,sizeof(ser));}}}//以下處理FD_CLOSE通知if(NetworkEvents.lNetworkEventsFD_CLOSE){if(NetworkEvents.iErrorCode[FD_WRITE_BIT]!=0){WSACloseEvent(EventArray[Index-WSA_WAIT_EVENT_0]);printf(“FD_WRITEfaieldwitherror%d＼n“,NetworkEvents.iErrorCode[FD_WRITE_BIT]);break;}//關閉套接口closesocket(SocketArray[Index-WSA_WAIT_EVENT_0]);//從套接口事件和事件數組中刪除關閉的套接口的有關信息CompressArrays(EventArray,SocketArray,EventTotal,Index-WSA_WAIT_EVENT_0);}}WSACleanup();return0;}第3章服務器設計3.1流程圖3.2代碼#includeWinSock2.h#includestdio.h#includestdlib.h#includestring.h#pragmacomment(lib,“ws2_32.lib“)#defineDEFAULT_PORT5051//FORRECV#defineBUFFER_LENGTH1000voidMySendMessage(SOCKETsSocket,char*response,intresponseLen,structsockaddr*cli,intcliLen);voidmain(){intiPort=DEFAULT_PORT;WSADATAwsaData;SOCKETsSocket,wchysSocket;intiLen,wchyiLen;intiSend;intiRecv;charsend_buf[1000];charname[255];charrecv_buf[BUFFER_LENGTH];char*ip;PHOSTENThostinfo;structsockaddr_inser,cli,wchy;if(WSAStartup(MAKEWORD(2,2),wsaData)!=0){printf(“FailedtoloadWinsock.＼n“);return;}if(gethostname(name,sizeof(name))==0){if((hostinfo=gethostbyname(name))!=NULL){ip=inet_ntoa(*(structin_addr*)*hostinfo-h_addr_list);}}printf(“----------------------＼n“);printf(“cServerWaiting＼n“);printf(“ip%s＼n“,ip);printf(“----------------------＼n“);sSocket=socket(AF_INET,SOCK_DGRAM,0);if(sSocket==INVALID_SOC12知識影響格局，格局決定命運！KET){printf(“socket()Faild:%d＼n“,WSAGetLastError());return;}ser.sin_family=AF_INET;ser.sin_port=htons(iPort);ser.sin_addr.s_addr=htonl(INADDR_ANY);if(bind(sSocket,(LPSOCKADDR)ser,sizeof(ser))==SOCKET_ERROR){printf(“bind()Faild:%d＼n“,WSAGetLastError());return;}iLen=sizeof(cli);memset(recv_buf,0,sizeof(recv_buf));while(1){//接收數據包確定cli表示cli存有客戶端發來的ip和portiRecv=recvfrom(sSocket,recv_buf,BUFFER_LENGTH,0,(SOCKADDR*)cli,iLen);if(iRecv==SOCKET_ERROR){printf(“recvfrom()Faild:%d＼n“,WSAGetLastError());return;}elseif(iRecv==0)break;else{//接收到了正確數據//printf(“[+]%s＼n“,recv_buf);//控制信息的種類有000110111220213031//00注冊成功01注冊失敗10登陸成功11.12表示登陸失敗20表示一次成功會話21表示錯誤會話30表示成功推出31表示錯誤推出冊成功＼n“);elseprintf(“注冊失敗＼n“);break;case＇1＇:if(recv_buf[1]==＇0＇){printf(“登陸成功＼n“);wchy.sin_family=AF_INET;wchy.sin_port=htons(5053);wchy.sin_addr.s_addr=inet_addr(“127.0.0.1“);wchysSocket=socket(AF_INET,SOCK_DGRAM,0);if(wchysSocket==INVALID_SOCKET){printf(“socket()Failed:%d＼n“,WSAGetLastError());return;}wchyiLen=sizeof(wchy);strcpy(send_buf,“##“);MySendMessage(wchysSocket,send_buf,sizeof(send_buf),(structsockaddr*)wchy,wchyiLen);}elseif(recv_buf[1]==＇@＇){printf(“已經在其他地方登陸＼n“);wchy.sin_family=AF_INET;wchy.sin_port=htons(5053);wchy.sin_addr.s_addr=inet_addr(“127.0.0.1“);wchysSocket=socket(AF_INET,SOCK_DGRAM,0);if(wchysSocket==INVALID_SOCKET){printf(“socket()Failed:%d＼13知識影響格局，格局決定命運！n“,WSAGetLastError());return;}wchyiLen=sizeof(wchy);strcpy(send_buf,“**“);MySendMessage(wchysSocket,send_buf,sizeof(send_buf),(structsockaddr*)wchy,wchyiLen);}else{printf(“登陸失敗＼n“);wchy.sin_family=AF_INET;wchy.sin_port=htons(5053);wchy.sin_addr.s_addr=inet_addr(“127.0.0.1“);wchysSocket=sock