通过UDP服务器发送const char*

Question

我正在尝试在我的代码中实现基本的UDP套接字来发送字符串。在C ++中创建了UDP服务器，以发送某种“ Hello World”和Python的客户端以接收它。为此，我将G4G的示例用作基础，只是稍作修改：

#define PORT xxxx

void initializeUDP(int stop) {

    int sockfd;
    const char *hello = "Hello from server.\n";
    struct sockaddr_in servaddr, cliaddr;

    //Initialize Winsock
    WSADATA data;
    WORD version = MAKEWORD(2, 2);
    int wsOk = WSAStartup(version, &data);
    if (wsOk != 0) {
        cout << "Cannot start Winsock! " << wsOk;
        return;
    }

    // Creating socket and binding with address
    if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
        perror("socket creation failed");
        exit(EXIT_FAILURE);
    }

    memset(&servaddr, 0, sizeof(servaddr));
    memset(&cliaddr, 0, sizeof(cliaddr));

    servaddr.sin_family = AF_INET; // IPv4 
    servaddr.sin_addr.s_addr = INADDR_ANY;
    servaddr.sin_port = htons(PORT);


    if (::bind(sockfd, (const struct sockaddr *)&servaddr, sizeof(servaddr)) < 0)
    {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }

    int len;

    len = sizeof(cliaddr);  //len is value/result 

    while (globalVariableNameInPortuguese == 0) {
        sendto(sockfd, (const char *)hello, 1024, 0, (const struct sockaddr *) &cliaddr, len);
    }

    closesocket(sockfd);
    WSACleanup();

}

还创建了这几行，以尝试接收该字符串作为Python中的客户端：

import socket

bufferSize = 1024

ip = "localhost"
port = xxxx
UDPClientSocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
UDPClientSocket.connect((ip, port))
while True:
    message, address = UDPClientSocket.recvfrom(bufferSize)

    print(message)

UDPClientSocket.close()

C ++代码正常执行，但我不确定它是否实际在做应该做的事情。但是，如果我将python代码中的IP设置为“ localhost”，它就会陷入recvfrom，如果我将IP设置为0.0.0.0，它将获得WinError 10049。不确定我做错了什么以及如何继续进行操作。实际获取此字符串。