c++socket编程cs架构

C++中的Socket编程是一种用于创建网络应用程序的常见方法，它基于传输控制协议（TCP）或用户数据报协议（UDP）来实现不同的通信需求。CS架构（Client-Server架构）是一种常见的网络应用程序设计模式，其中服务器端提供服务，而客户端通过Socket连接请求服务。

在C++中进行Socket编程，可以使用操作系统提供的原生Socket API或者一些封装库，如Boost.Asio、Poco、ACE等。下面是一个简单的CS架构的Socket编程示例：

服务器端代码：

#include <iostream>
#include <cstring>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>

int main() {
    // 创建Socket
    int serverSocket = socket(AF_INET, SOCK_STREAM, 0);
    if (serverSocket == -1) {
        std::cerr << "Failed to create socket" << std::endl;
        return 1;
    }

    // 绑定IP地址和端口
    sockaddr_in serverAddress{};
    serverAddress.sin_family = AF_INET;
    serverAddress.sin_addr.s_addr = INADDR_ANY;
    serverAddress.sin_port = htons(12345);
    if (bind(serverSocket, (struct sockaddr*)&serverAddress, sizeof(serverAddress)) == -1) {
        std::cerr << "Failed to bind address" << std::endl;
        close(serverSocket);
        return 1;
    }

    // 监听连接请求
    if (listen(serverSocket, 5) == -1) {
        std::cerr << "Failed to listen" << std::endl;
        close(serverSocket);
        return 1;
    }

    // 接受客户端连接
    sockaddr_in clientAddress{};
    socklen_t clientAddressLength = sizeof(clientAddress);
    int clientSocket = accept(serverSocket, (struct sockaddr*)&clientAddress, &clientAddressLength);
    if (clientSocket == -1) {
        std::cerr << "Failed to accept client connection" << std::endl;
        close(serverSocket);
        return 1;
    }

    // 接收和发送数据
    char buffer[1024];
    std::memset(buffer, 0, sizeof(buffer));
    if (recv(clientSocket, buffer, sizeof(buffer), 0) == -1) {
        std::cerr << "Failed to receive data" << std::endl;
        close(clientSocket);
        close(serverSocket);
        return 1;
    }
    std::cout << "Received message from client: " << buffer << std::endl;

    const char* response = "Hello from server!";
    if (send(clientSocket, response, std::strlen(response), 0) == -1) {
        std::cerr << "Failed to send data" << std::endl;
        close(clientSocket);
        close(serverSocket);
        return 1;
    }

    // 关闭连接
    close(clientSocket);
    close(serverSocket);

    return 0;
}

客户端代码：

#include <iostream>
#include <cstring>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

int main() {
    // 创建Socket
    int clientSocket = socket(AF_INET, SOCK_STREAM, 0);
    if (clientSocket == -1) {
        std::cerr << "Failed to create socket" << std::endl;
        return 1;
    }

    // 连接服务器
    sockaddr_in serverAddress{};
    serverAddress.sin_family = AF_INET;
    serverAddress.sin_port = htons(12345);
    if (inet_pton(AF_INET, "127.0.0.1", &(serverAddress.sin_addr)) <= 0) {
        std::cerr << "Invalid address" << std::endl;
        close(clientSocket);
        return 1;
    }
    if (connect(clientSocket, (struct sockaddr*)&serverAddress, sizeof(serverAddress)) == -1) {
        std::cerr << "Failed to connect to server" << std::endl;
        close(clientSocket);
        return 1;
    }

    // 发送和接收数据
    const char* message = "Hello from client!";
    if (send(clientSocket, message, std::strlen(message), 0) == -1) {
        std::cerr << "Failed to send data" << std::endl;
        close(clientSocket);
        return 1;
    }

    char buffer[1024];
    std::memset(buffer, 0, sizeof(buffer));
    if (recv(clientSocket, buffer, sizeof(buffer), 0) == -1) {
        std::cerr << "Failed to receive data" << std::endl;
        close(clientSocket);
        return 1;
    }
    std::cout << "Received message from server: " << buffer << std::endl;

    // 关闭连接
    close(clientSocket);

    return 0;
}

上述代码展示了一个简单的CS架构的Socket编程示例，其中服务器端监听连接请求并与客户端进行通信，客户端通过Socket连接服务器并发送消息，服务器接收消息并回复。你可以根据实际需求进行修改和扩展。