console 内网聊天 (TcpChat)

最新推荐文章于 2025-03-10 17:08:22 发布

Qwangzhi

最新推荐文章于 2025-03-10 17:08:22 发布

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分类专栏：学习笔记+代码文章标签：聊天服务器 socket string stream network

本文链接：https://blog.youkuaiyun.com/Qwangzhi/article/details/5879503

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本文展示了如何使用C++通过TCP协议创建一个简单的内网聊天室。包括服务器端(TcpChatSrv)和客户端(TcpChatClient)的代码实现，允许用户通过命令行输入消息并进行交流。服务器监听6000端口，客户端连接到127.0.0.1的6000端口进行通信。当接收到'q'字符时，会终止聊天并关闭连接。

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(1)
/*console 下的内网聊天室*/
TcpChatSrv(服务器端)

#include <stdio.h>
#include <winsock2.h>
#pragma comment (lib,"ws2_32")

void main()
{
WORD wVersionRequested;
WSADATA wsaData;
int err;

wVersionRequested = MAKEWORD( 2, 2 );

err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
return;
}

if ( LOBYTE( wsaData.wVersion ) != 2 ||
   HIBYTE( wsaData.wVersion ) != 2 ) {
  WSACleanup( );
  return;
}

SOCKET SockSrv=socket(AF_INET,SOCK_STREAM,0);

SOCKADDR_IN addrsrv;
addrsrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
/Sockets htonl function converts a u_long from host to TCP/IP network byte order (which is big-endian).
转换主机字节序到网络字节序
服务器端绑定INADDR_ANY (0.0.0.0) 即是服务器有多个ip。告诉操作系统：“我需要在 yyyy 端口上侦听，所以发送到服务器的这个端口，不管是哪个网卡/哪个IP地址接收到的数据，都是我处理的。”这时候，服务器程序则在0.0.0.0这个地址上进行侦听。*/
addrsrv.sin_family=AF_INET;
addrsrv.sin_port=6000;

bind(SockSrv,(sockaddr*)&addrsrv,sizeof(SOCKADDR));
listen(SockSrv,10);

int len=sizeof(SOCKADDR);
SOCKADDR_IN addrclient;

SOCKET SockConnect=accept(SockSrv,(sockaddr*)&addrclient,&len);

char sendbuf[100];
char recvbuf[100];
char tempbuf[100];

while (1)
{
  recv(SockConnect,recvbuf,100,0);
  if('q'==recvbuf[0]){
      printf("%s/n","客户端请求退出！");
   send(SockConnect,"q",sizeof('q')+1,0);
   break;}

  sprintf(tempbuf,"%s say:%s",inet_ntoa(addrclient.sin_addr),recvbuf);
  /*格式化几个字符数组到一个数组中，inet_ntoa function convers an (ipv4)network address into a     string */
  printf("%s/n",tempbuf);
  printf("please input data!/n");

  gets(sendbuf);
  send(SockConnect,sendbuf,strlen(sendbuf)+1,0);
}
closesocket(SockConnect);
closesocket(SockSrv);
WSACleanup();

}

TcpChatClient(客户端)

#include <stdio.h>
#include <winsock2.h>
#pragma comment (lib,"ws2_32")

void main()
{
WORD wVersionRequested;
WSADATA wsaData;
int err;

wVersionRequested = MAKEWORD( 2, 2 );

err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
return;
}

if ( LOBYTE( wsaData.wVersion ) != 2 ||
   HIBYTE( wsaData.wVersion ) != 2 ) {
  WSACleanup( );
  return;
}

SOCKET SocketClient=socket(AF_INET,SOCK_STREAM,0);

SOCKADDR_IN AddrSrv;
AddrSrv.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");
/*inet_addr convers string(ipv4) to address for the IN_ADDR structrue.转换string 到 IN_ADDR*/
AddrSrv.sin_family=AF_INET;
AddrSrv.sin_port=6000;

connect(SocketClient,(sockaddr*)&AddrSrv,sizeof(SOCKADDR));

char sendbuf[100];
char recvbuf[100];
char tempbuf[100];

while (1)
{
  printf("please input data!/n");
  gets(sendbuf);
          send(SocketClient,sendbuf,strlen(sendbuf)+1,0);
  recv(SocketClient,recvbuf,100,0);
  if(recvbuf[0]=='q')
  {
   printf("%s/n","服务器端请求退出！");
   send(SocketClient,"q",2,0);
   break;
  }

  sprintf(tempbuf,"%s say:%s",inet_ntoa(AddrSrv.sin_addr),recvbuf);
  printf("%s",recvbuf);


}

closesocket(SocketClient);
WSACleanup();