【Chat】实验 -- 实现 C/C++下TCP, 服务器/客户端 "多人聊天室"

本次实验利用TCP/IP, 语言环境为 C/C++

利用套接字Socket编程，以及线程处理，

实现Server/CLient 之间多人的聊天系统的基本功能。

结果大致如：

下面贴上代码（参考参考...)

Server 部分：

 /* TCPdtd.cpp - main, TCPdaytimed */

 #include <stdlib.h>
 #include <stdio.h>
 #include <winsock2.h>
 #include <time.h>
 #include "conio.h"
 #include <windows.h>
 #include <process.h>
 #include <math.h>

 #define QLEN       5
 #define    WSVERS    MAKEWORD(2, 0)
 #define    BUFLEN    2000             // 缓冲区大小
 #pragma comment(lib,"ws2_32.lib")  //winsock 2.2 library

     SOCKET    msock, ssock;            /* master & slave sockets           */
     SOCKET    sockets[] = {NULL};

      int cc;
      char    *pts;                    /* pointer to time string           */
      time_t    now;                    /* current time                       */
      char buf[];                      /* buffer                          */
      char *input;
      HANDLE hThread1,hThread[] = {NULL};
     unsigned int threadID,ThreadID[],number;

     struct    sockaddr_in fsin;
     struct    sockaddr_in Sin;

 unsigned int __stdcall Chat(PVOID PM)
 {
         char buf1[];
         char buf2[];
         char buf3[];
         char buf4[];
         (void) time(&now);
         pts = ctime(&now);
         sockets[number] = ssock;
         SOCKET    sock = ssock;
         ThreadID[number] = threadID;
         unsigned int threadid = threadID;
         sprintf(buf1," 时间： %s  \t【我的线程号： %d 】\n",pts,threadid);
         (void) send(sock,buf1, sizeof(buf1), );
         sprintf(buf2," 线程号 <%d> 客户<IP:%s 端口:%d>  enter  \n",threadid,inet_ntoa(fsin.sin_addr),fsin.sin_port);
         printf("%s ",buf2);
         printf("\t将自动把此数据发送给所有客户！ \n");
         for(int i=;i<=number;i++)
         {
             if(sockets[i] != NULL && sockets[i] != sock)
             {
             (void) send(sockets[i],buf2, sizeof(buf2), );
             printf(" 发送至线程号<%d>成功！\n",ThreadID[i]);
             }
         }
         printf(" \n");

 flag1:cc = recv(sock, buf3, BUFLEN, );   //cc为接收的字符数
     if(cc == SOCKET_ERROR|| cc == )
     {
         (void) time(&now);
         pts = ctime(&now);
         sprintf( buf3," 线程号 <%d> 客户<IP:%s 端口:%d>  leave !  \n \t\t时间： %s",threadid,inet_ntoa(fsin.sin_addr),fsin.sin_port,pts);
         sock = NULL;
         sockets[number] = NULL;
         CloseHandle(hThread[number]);
         printf("%s ", buf3);
         printf("\t将自动把此数据发送给所有客户！ \n");
         for(int i=;i<=number;i++)
         {
             if(sockets[i] != NULL && sockets[i] != sock)
             {
             (void) send(sockets[i], buf3, sizeof(buf3), );
             printf(" 发送至线程号<%d>成功！\n",ThreadID[i]);
             }
         }
     printf(" \n");
     }

     else if(cc > )
     {
         (void) time(&now);
         pts = ctime(&now);
     sprintf(buf4," 线程号 <%d> 客户<IP:%s 端口:%d>说 ：%s  \n \t\t时间 ： %s",threadid,inet_ntoa(fsin.sin_addr),fsin.sin_port,buf3,pts);

         printf("%s ",buf4);
         printf("\t将自动把此数据发送给所有客户！ \n");
         for(int i=;i<=number;i++)
         {
             if(sockets[i] != NULL && sockets[i] != sock)
             {
             (void) send(sockets[i],buf4, sizeof(buf4), );
             printf(" 发送至线程号<%d>成功！\n",ThreadID[i]);
             }
         }
         printf(" \n");

         goto flag1;
     }
         (void) closesocket(sock);

         return ;
         }

 /*------------------------------------------------------------------------
  * main - Iterative TCP server for DAYTIME service
  *------------------------------------------------------------------------
  */
 void main(int argc, char *argv[])
 /* argc: 命令行参数个数， 例如：C:\> TCPdaytimed 8080
                      argc=2 argv[0]="TCPdaytimed",argv[1]="8080" */
 {
     int     alen;                    /* from-address length               */
     WSADATA wsadata;
     char    *service = "";
     WSAStartup(WSVERS, &wsadata);                         //加载 winsock 2.2 library
     msock = socket(PF_INET, SOCK_STREAM, );              //生成套接字。TCP协议号=6， UDP协议号=17
     memset(&Sin, , sizeof(Sin));
     Sin.sin_family = AF_INET;
     Sin.sin_addr.s_addr = INADDR_ANY;                    //指定绑定接口的IP地址。INADDR_ANY表示绑定(监听)所有的接口。
     Sin.sin_port = htons((u_short)atoi(service));        //atoi--把ascii转化为int，htons - 主机序(host)转化为网络序(network), s(short)
     bind(msock, (struct sockaddr *)&Sin, sizeof(Sin));   // 绑定端口号（和IP地址)
     listen(msock, );                                    //队列长度为5

     printf("\t\t\t\t Chat 多人聊天程序 \n");
     printf("\t\t\t\t       (Server) \n");
      (void) time(&now);
       pts = ctime(&now);
     printf("\t\t\t  时间 ：%s",pts);
         number = -;
     while()                                    //检测是否有按键
     {
         alen = sizeof(struct sockaddr);
         ssock = accept(msock, (struct sockaddr *)&fsin, &alen);
         number ++;
         hThread[number] = (HANDLE)_beginthreadex(NULL, ,Chat,NULL, , &threadID);
     }
     (void) closesocket(msock);
     WSACleanup();                         //卸载载 winsock 2.2 library
 }

Client 部分：

 /* TCPClient.cpp  -- 用于传递struct */
 #include <stdlib.h>
 #include <stdio.h>
 #include <winsock2.h>
 #include <string.h>
 #include <time.h>
 #include <windows.h>
 #include <process.h>
 #include <math.h>

 #define    BUFLEN        2000                  // 缓冲区大小
 #define WSVERS        MAKEWORD(2, 0)        // 指明版本2.0
 #pragma comment(lib,"ws2_32.lib")         // 指明winsock 2.0 Llibrary

 /*------------------------------------------------------------------------
  * main - TCP client for DAYTIME service
  *------------------------------------------------------------------------
  */

     SOCKET    sock,sockets[] = {NULL};                          /* socket descriptor            */
 //    int    cc;                                /* recv character count            */
     char    *packet = NULL;               /* buffer for one line of text    */
     char *pts,*input;
     HANDLE hThread;
     unsigned threadID;

 unsigned int __stdcall Chat(PVOID PM )
 {
        time_t    now;
       (void) time(&now);
        pts = ctime(&now);
        char buf[];

 while()
 {
     int cc = recv(sock, buf, BUFLEN, );   //cc为接收的字符数
     if(cc == SOCKET_ERROR|| cc == )
     {
         printf("Error: %d.----",GetLastError());
         printf("与服务器断开连接！\n");
         CloseHandle(hThread);
         (void)closesocket(sock);
         break;
     }
     else if(cc > )
     {
     //    buf[cc] = '\0';
         printf("%s\n",buf);
     //    printf("输入数据（exit退出):  \n");
     }
 }
     return ;
 }

 int main(int argc, char *argv[])
 {
     time_t    now;
      (void) time(&now);
        pts = ctime(&now);
     char    *host = "127.0.0.1";        /* server IP to connect         */
 //    char    *host = "172.18.33.155";
 //    char    *host = "172.18.33.93";
 //    char    *host = "172.18.187.1";
     char *service = "";          /* server port to connect       */
 //    char *service = "50000";
     struct  sockaddr_in sin;            /* an Internet endpoint address    */
     WSADATA wsadata;
     WSAStartup(WSVERS, &wsadata);       /* 启动某版本Socket的DLL        */        

     memset(&sin, , sizeof(sin));
     sin.sin_family = AF_INET;
     sin.sin_port = htons((u_short)atoi(service));    //atoi：把ascii转化为int. htons：主机序(host)转化为网络序(network), s--short
     sin.sin_addr.s_addr = inet_addr(host);           //如果host为域名，需要先用函数gethostbyname把域名转化为IP地址

     sock = socket(PF_INET, SOCK_STREAM,);

     connect(sock, (struct sockaddr *)&sin, sizeof(sin));

     printf("\t\t\t\tChat 多人聊天程序 \n");
     printf("\t\t\t\t       (Client) \n");
     hThread = (HANDLE)_beginthreadex(NULL, ,Chat, NULL, , &threadID);
     printf(" \t\t\t\t 【您可以自由发言】\n\n");
 while()
 {
     char buf1[];

     //     scanf("%s",&buf1);

          gets_s(buf1);
          if(!strcmp(buf1 ,"exit"))
              goto end;

         (void) send(sock,buf1, sizeof(buf1), );
         (void) time(&now);
         pts = ctime(&now);
        printf(" 发送成功！ ------时间： %s\n",pts);
 }

 end:    CloseHandle(hThread);
         closesocket(sock);
         WSACleanup();                     /* 卸载某版本的DLL */  

     printf("按回车键继续...");
     getchar();
     return ;                           /* exit */
 }