C/C++:sys/Socket .h >在循环中使用sEnter(),发送多条消息

我让它工作了(修改了一个在线示例),但我不确定它是否是发送多条消息的正确方式。问题是,在我的例子中,我不能在循环的客户端使用send()函数,除非:

• 代码在两边的循环之前,但在这种情况下,客户端无法重新连接。

服务器:

    int main(int argc, char const *argv[]) {
    int server_fd, new_socket, valread;
    struct sockaddr_in address;
    int opt = 1;
    int addrlen = sizeof(address);
    char buffer[1024] = {0};
    char *hello = "Hello from server";

    // Creating socket file descriptor
    if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }

    // Forcefully attaching socket to the port 8080
    if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt))) {
        perror("setsockopt");
        exit(EXIT_FAILURE);
    }

    address.sin_family = AF_INET;
    address.sin_addr.s_addr = INADDR_ANY;
    address.sin_port = htons(PORT);

    // Forcefully attaching socket to the port 8080
    if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }

    if (listen(server_fd, 3) < 0) {
        perror("listen");
        exit(EXIT_FAILURE);
    }


    // Accept
    if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t *)&addrlen)) < 0) {
        perror("accept");
        exit(EXIT_FAILURE);
    }

    while (true) {

        // valread = read( new_socket , buffer, 1024);
        // printf("Buffer: %s\n",buffer );

        // if (recv(new_socket, buffer, 1024, MSG_PEEK) > 0) {
        //     printf("Buffer: %s\n",buffer );
        // }

        if (read(new_socket, buffer, 1024) > 0) {
            printf("Buffer: %s\n", buffer);
        }
        bzero(buffer, 1024);
    }

    send(new_socket, hello, strlen(hello), 0);
    printf("Hello message sent\n");

    return 0;
}

客户:

    int main(int argc, char const *argv[]) { 
    struct sockaddr_in address; 
    int sock = 0, valread; 
    struct sockaddr_in serv_addr; 
    // char *hello = "Hel0o from client"; 
    char *hello; 
    char buffer[1024] = {0}; 

    std::string msg;

    if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 
        printf("\n Socket creation error \n"); 
        return -1; 
    } 

    memset(&serv_addr, '0', sizeof(serv_addr)); 

    serv_addr.sin_family = AF_INET; 
    serv_addr.sin_port = htons(PORT); 

    // Convert IPv4 and IPv6 addresses from text to binary form 
    if(inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr) <= 0)  { 
        printf("\nInvalid address/ Address not supported \n"); 
        return -1; 
    } 

    if (connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) { 
        printf("\nConnection Failed \n"); 
        return -1; 
    }

    while (true) {
        std::cout << "msg: ";
        std::cin >> msg;

        hello = new char[msg.length() + 1];
        std::strcpy(hello, msg.c_str());

        send(sock , hello , strlen(hello) , 0 );
    }

    printf("Hello message sent\n"); 
    valread = read( sock , buffer, 1024); 
    printf("%s\n",buffer ); 
    return 0; 
}

正确的做法是什么?