相关疑难解决方法(0)

我正在为课堂上的家庭作业问题做准备.我想启动一个侦听文件请求的UDP服务器.它打开文件并使用UDP将其发送回请求客户端.

继承人的服务器代码.

    // Create UDP Socket
    if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
        perror("Can't create socket");
        exit(-1);
    }

    // Configure socket
    memset(&server, 0, sizeof server);
    server.sin_family = AF_INET; // Use IPv4
    server.sin_addr.s_addr = htonl(INADDR_ANY); // My IP
    server.sin_port = htons(atoi(argv[1])); // Server Port

    // Bind socket
    if ((bind(sockfd, (struct sockaddr *) &server, sizeof(server))) == -1) {
        close(sockfd);
        perror("Can't bind");
    }

    printf("listener: waiting to recvfrom...\n");
    if (listen(sockfd, 5) == -1) {
        perror("Can't listen for connections");
        exit(-1);
    }

while (1) …