C++ Socket编程：TCP客户端与服务器实现

#include 
#include 
#include 
#include 
#include 

int main() {
    int server_fd, client_fd;
    struct sockaddr_in address;
    int addrlen = sizeof(address);
    char buffer[1024] = {0};

    // 创建Socket
    if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
        std::cerr << "Socket创建失败\n";
        return -1;
    }

    // 配置地址结构
    address.sin_family = AF_INET;
    address.sin_addr.s_addr = INADDR_ANY;
    address.sin_port = htons(8888);

    // 绑定
    if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {
        std::cerr << "Bind失败\n";
        return -1;
    }

    // 监听
    if (listen(server_fd, 3) < 0) {
        std::cerr << "Listen失败\n";
        return -1;
    }

    std::cout << "服务器正在监听8888端口...\n";

    // 接受连接
    if ((client_fd = accept(server_fd, (struct sockaddr *)&address, (socklen_t*)&addrlen)) < 0) {
        std::cerr << "Accept失败\n";
        return -1;
    }

    // 接收数据
    int valread = read(client_fd, buffer, 1024);
    std::cout << "收到: " << buffer << "\n";

    // 发送响应
    const char *response = "Hello from server";
    send(client_fd, response, strlen(response), 0);

    // 关闭连接
    close(client_fd);
    close(server_fd);
    return 0;
}

#include 
#include 
#include 
#include 
#include 

int main() {
    int sock = 0;
    struct sockaddr_in serv_addr;
    char buffer[1024] = {0};
    const char *hello = "Hello from client";

    // 创建Socket
    if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
        std::cerr << "Socket创建失败\n";
        return -1;
    }

    serv_addr.sin_family = AF_INET;
    serv_addr.sin_port = htons(8888);

    // 将IP地址从文本转换为二进制
    if (inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr) <= 0) {
        std::cerr << "无效地址或地址不支持\n";
        return -1;
    }

    // 连接服务器
    if (connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
        std::cerr << "连接失败\n";
        return -1;
    }

    // 发送数据
    send(sock, hello, strlen(hello), 0);
    std::cout << "消息已发送\n";

    // 接收响应
    int valread = read(sock, buffer, 1024);
    std::cout << "服务器响应: " << buffer << "\n";

    // 关闭连接
    close(sock);
    return 0;
}