基于UDP简单聊天程序

服务器端：

#include
#include

void main()
{
    //加载套接字库
    WORD wVersionRequest;
    WSADATA wsData;
    int err;
    wVersionRequest = MAKEWORD(1,1);

    err = WSAStartup(wVersionRequest,&wsData);
    if (err != 0)
    {
        return;
    }


    if (LOBYTE(wsData.wVersion) != 1 || HIBYTE(wsData.wVersion) != 1)
    {
        WSACleanup();
        return;
    }

    //创建套接字
    SOCKET sockSrv = socket(AF_INET, SOCK_DGRAM, 0);
    SOCKADDR_IN addrSrv;
    addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
    addrSrv.sin_family = AF_INET;
    addrSrv.sin_port = htons(6000);

    //绑定套接字
    bind(sockSrv, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR));

    //创建数据缓冲区
    char recvBuf[100];
    char sendBuf[100];
    char tempBuf[200];

    SOCKADDR_IN  addrClient;
    int len = sizeof(SOCKADDR);

    while (1)
    {
        //等待并接收数据
        recvfrom(sockSrv, recvBuf, 100, 0, (SOCKADDR*)&addrClient, &len);
        //对接收的数据进行判断
        if ('q' == recvBuf[0])
        {
            sendto(sockSrv, "q", strlen("q")+1, 0, (SOCKADDR*)&addrClient, len);
            printf("Chat end!\n");
            break;
        }

        sprintf(tempBuf, "%s say: %s", inet_ntoa(addrClient.sin_addr), recvBuf);
        printf("%s\n", tempBuf);

        //发送数据
        printf("Please input data:\n");
        gets(sendBuf);
        sendto(sockSrv, sendBuf, strlen(sendBuf)+1, 0, (SOCKADDR*)&addrClient, len);
    }

    //关闭套接字
    closesocket(sockSrv);
    WSACleanup();
}

客户端：

 

#include
#include

void  main()
{
    //加载套接字库
    WORD wVersionRequest;
    WSADATA wsData;
    int err;
    wVersionRequest = MAKEWORD(1,1);

    err = WSAStartup(wVersionRequest,&wsData);
    if (err != 0)
    {
        return;
    }


    if (LOBYTE(wsData.wVersion) != 1 || HIBYTE(wsData.wVersion) != 1)
    {
        WSACleanup();
        return;
    }

    //创建套接字
    SOCKET sockClient = socket(AF_INET, SOCK_DGRAM, 0);

    SOCKADDR_IN addrSrv;
    addrSrv.sin_family = AF_INET;
    addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
    addrSrv.sin_port = htons(6000);


    //创建数据缓冲区
    char recvBuf[100];
    char sendBuf[100];
    char tempBuf[200];

    int len = sizeof(SOCKADDR);

    while(1)
    {
        //发送数据
        printf("Please input data:\n");
        gets(sendBuf);
        sendto(sockClient, sendBuf, strlen(sendBuf)+1, 0, (SOCKADDR*)&addrSrv, len);

        //等待并接收数据
        recvfrom(sockClient, recvBuf, 100 ,0, (SOCKADDR*)&addrSrv, &len);
        if ('q' == recvBuf[0])
        {
            sendto(sockClient, "q", strlen("q")+1, 0, (SOCKADDR*)&addrSrv, len);
            printf("Chat end!\n");
            break;
        }

        sprintf(tempBuf, "%s say:%s", inet_ntoa(addrSrv.sin_addr), recvBuf);
        printf("%s\n", tempBuf);
    }

    //关闭套接字
    closesocket(sockClient);
    WSACleanup();

}

 

转载于:https://blog.51cto.com/lixiaomeng/708321