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  • C++ UDP客户端服务器Socket编程

    UDPServer.cpp
    #include<WINSOCK2.H>
    #include<iostream>
    #pragma comment(lib,"WS2_32.lib")
    using namespace std;
    int main()
    {
    WSADATA wsaData;//初始化
    SOCKET SendSocket;
    sockaddr_in RecvAddr;//服务器地址
    int Port=4000;//服务器监听地址
    char SendBuf[1024];//发送数据的缓冲区
    int BufLen=1024;//缓冲区大小
    //初始化Socket
    WSAStartup(MAKEWORD(2,2),&wsaData);
    //创建Socket对象
    SendSocket=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
    //设置服务器地址
    RecvAddr.sin_family=AF_INET;
    RecvAddr.sin_port=htons(Port);
    RecvAddr.sin_addr.s_addr=inet_addr("192.168.137.1");
    //向服务器发送数据报
    printf("Sending a datagram to the receiver... ");
    sendto(SendSocket,SendBuf,BufLen,0,(SOCKADDR *)&RecvAddr,sizeof(RecvAddr));
    //发送完成,关闭Socket
    printf("finished sending,close socket. ");
    closesocket(SendSocket);
    printf("Exting. ");
    WSACleanup();
    return 0;
    }
    UDPClient.cpp
    #include<WINSOCK2.H>
    #include<iostream>
    #pragma comment(lib,"WS2_32.lib")
    using namespace std;
    int main()
    {
    WSADATA wsaData;//初始化
    SOCKET RecvSocket;
    sockaddr_in RecvAddr;//服务器地址
    int Port=4000;//服务器监听地址
    char RecvBuf[1024];//发送数据的缓冲区
    int BufLen=1024;//缓冲区大小
    sockaddr_in SenderAddr;
    int SenderAddrSize=sizeof(SenderAddr);
    //初始化Socket
    WSAStartup(MAKEWORD(2,2),&wsaData);
    //创建接收数据报的socket
    RecvSocket=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
    //将socket与制定端口和0.0.0.0绑定
    RecvAddr.sin_family=AF_INET;
    RecvAddr.sin_port=htons(Port);
    RecvAddr.sin_addr.s_addr=htonl(INADDR_ANY);
    bind(RecvSocket,(SOCKADDR *)&RecvAddr,sizeof(RecvAddr));
    //调用Recvfrom函数在绑定的socket上接收数据
    printf("receiving datagrams... ");
    recvfrom(RecvSocket,RecvBuf,BufLen,0,(SOCKADDR *)&SenderAddr,&SenderAddrSize);
    //关闭socket,结束接收数据
    printf("finished receiving,closing socket.. ");
    closesocket(RecvSocket);
    //释放资源,退出
    printf("Exiting. ");
    WSACleanup();
    return 0;
    }
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  • 原文地址:https://www.cnblogs.com/zhangaihua/p/3718090.html
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